Upgrade all Rust dependencies

This fixes a bug where setting anything in `rust-cache-parameters` caused the input to the
`rust-cache` to be broken.

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: autarch

.github/workflows/lint.yml

@@ -0,0 +1,22 @@
+name: Lint
+
+on: [push, pull_request]
+
+env:
+  GITHUB_TOKEN: ${{ github.token }}
+
+jobs:
+  lint:
+    name: Check that code is lint clean using precious
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install mise
+        run: |
+          set -e
+          set -x
+          curl https://mise.run | sh
+          mise install
+      - name: Run precious
+        run: |
+          mise exec -- precious lint -a

.github/workflows/test.yml

@@ -0,0 +1,445 @@
+name: Self-test
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test-action:
+    name: Test action
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - name: FreeBSD-x86_64
+            runs-on: ubuntu-24.04
+            target: x86_64-unknown-freebsd
+            cache-cross-binary: true
+            expect-file-re: "x86-64.+FreeBSD"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: false
+
+          - name: Linux-x86_64
+            runs-on: ubuntu-24.04
+            # It's important to use a musl target here to make sure that the step to install
+            # musl-tools works.
+            target: x86_64-unknown-linux-musl
+            cache-cross-binary: true
+            expect-file-re: "ELF.+x86-64"
+            expect-cross: ""
+            expect-stripped: "--expect-stripped"
+            can-execute: true
+
+          - name: Linux-x86_64 (beta)
+            runs-on: ubuntu-24.04
+            target: x86_64-unknown-linux-musl
+            toolchain: beta
+            cache-cross-binary: true
+            expect-file-re: "ELF.+x86-64"
+            expect-cross: ""
+            expect-stripped: "--expect-stripped"
+            can-execute: true
+
+          - name: Linux-x86_64 (nightly)
+            runs-on: ubuntu-24.04
+            target: x86_64-unknown-linux-musl
+            toolchain: nightly
+            cache-cross-binary: true
+            expect-file-re: "ELF.+x86-64"
+            expect-cross: ""
+            expect-stripped: "--expect-stripped"
+            can-execute: true
+
+          - name: Linux-x86_64 (force cross)
+            runs-on: ubuntu-24.04
+            target: x86_64-unknown-linux-gnu
+            force-use-cross: true
+            cache-cross-binary: true
+            expect-file-re: "ELF.+x86-64"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-x86_64 (stable 8 months ago)
+            runs-on: ubuntu-24.04
+            target: x86_64-unknown-linux-gnu
+            toolchain: "stable 8 months ago"
+            cache-cross-binary: true
+            expect-file-re: "ELF.+x86-64"
+            expect-cross: ""
+            expect-stripped: "--expect-stripped"
+            can-execute: true
+
+          - name: Linux-aarch64
+            runs-on: ubuntu-24.04
+            target: aarch64-unknown-linux-musl
+            cache-cross-binary: true
+            expect-file-re: "aarch64"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-aarch64 (no cache)
+            runs-on: ubuntu-24.04
+            target: aarch64-unknown-linux-gnu
+            cache-cross-binary: false
+            expect-file-re: "aarch64"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-aarch64 with cross v0.2.3
+            runs-on: ubuntu-24.04
+            target: aarch64-unknown-linux-gnu
+            cross-version: "v0.2.3"
+            cache-cross-binary: true
+            expect-file-re: "aarch64"
+            expect-cross: "--expect-cross"
+            expect-cross-version: "0.2.3"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-aarch64 with cross v0.2.3 (no cache)
+            runs-on: ubuntu-24.04
+            target: aarch64-unknown-linux-gnu
+            cross-version: "v0.2.3"
+            cache-cross-binary: false
+            expect-file-re: "aarch64"
+            expect-cross: "--expect-cross"
+            expect-cross-version: "0.2.3"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-aarch64 with cross 19be834
+            runs-on: ubuntu-24.04
+            target: aarch64-unknown-linux-gnu
+            cross-version: "19be834"
+            cache-cross-binary: true
+            expect-file-re: "aarch64"
+            expect-cross: "--expect-cross"
+            expect-cross-version: "19be834"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-aarch64 with cross 19be834 (no cache)
+            runs-on: ubuntu-24.04
+            target: aarch64-unknown-linux-gnu
+            cross-version: "19be834"
+            cache-cross-binary: false
+            expect-file-re: "aarch64"
+            expect-cross: "--expect-cross"
+            expect-cross-version: "19be834"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-aarch64 with arm64 host
+            runs-on: ubuntu-24.04-arm
+            target: aarch64-unknown-linux-gnu
+            cache-cross-binary: true
+            expect-file-re: "aarch64"
+            expect-cross: ""
+            expect-stripped: "--expect-stripped"
+            can-execute: true
+
+          # This fails because of some sort of weird bug in cross. See
+          # https://github.com/cross-rs/cross/issues/1628 for more details. Until that's fixed
+          # cross-compiling on Linux ARM won't work without a custom Docker image, which I don't
+          # want to do just for the sake of testing this.
+          #
+          # - name: Linux-aarch64 with arm64 host compile to x86-64
+          #   runs-on: ubuntu-24.04-arm
+          #   target: x86_64-unknown-linux-gnu
+          #   # Until cross produces arm64 binary releases we _have_ to set this when running on
+          #   # arm64.
+          #   cross-version: "c7dee4d"
+          #   cache-cross-binary: true
+          #   expect-file-re: "ELF.+x86-64"
+          #   expect-cross: "--expect-cross"
+          #   expect-stripped: ""
+          #   can-execute: true
+
+          - name: Linux-arm
+            runs-on: ubuntu-24.04
+            target: arm-unknown-linux-gnueabi
+            cache-cross-binary: true
+            expect-file-re: "32.+ARM"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-i586
+            runs-on: ubuntu-24.04
+            target: i586-unknown-linux-gnu
+            cache-cross-binary: true
+            expect-file-re: "ELF.+80386"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-i686
+            runs-on: ubuntu-24.04
+            target: i686-unknown-linux-gnu
+            cache-cross-binary: true
+            expect-file-re: "ELF.+80386"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-powerpc
+            runs-on: ubuntu-24.04
+            target: powerpc-unknown-linux-gnu
+            cache-cross-binary: true
+            expect-file-re: "32.+PowerPC"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-powerpc64
+            runs-on: ubuntu-24.04
+            target: powerpc64-unknown-linux-gnu
+            cache-cross-binary: true
+            expect-file-re: "64.+PowerPC"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-powerpc64le
+            runs-on: ubuntu-24.04
+            target: powerpc64le-unknown-linux-gnu
+            cache-cross-binary: true
+            expect-file-re: "64.+PowerPC"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-riscv64
+            runs-on: ubuntu-24.04
+            target: riscv64gc-unknown-linux-gnu
+            cache-cross-binary: true
+            expect-file-re: "64.+RISC-V"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: Linux-s390x
+            runs-on: ubuntu-24.04
+            target: s390x-unknown-linux-gnu
+            cache-cross-binary: true
+            expect-file-re: "64.+S/390"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: true
+
+          - name: NetBSD-x86_64
+            runs-on: ubuntu-24.04
+            target: x86_64-unknown-netbsd
+            cache-cross-binary: true
+            expect-file-re: "x86-64.+NetBSD"
+            expect-cross: "--expect-cross"
+            expect-stripped: ""
+            can-execute: false
+
+          - name: Windows-aarch64
+            runs-on: windows-latest
+            target: aarch64-pc-windows-msvc
+            cache-cross-binary: true
+            expect-file-re: "Windows.+ARM64"
+            expect-cross: ""
+            expect-stripped: ""
+            can-execute: false
+
+          - name: Windows-i686
+            runs-on: windows-latest
+            target: i686-pc-windows-msvc
+            cache-cross-binary: true
+            expect-file-re: "Windows.+Intel i386"
+            expect-cross: ""
+            expect-stripped: "--expect-stripped"
+            can-execute: true
+
+          - name: Windows-x86_64
+            runs-on: windows-latest
+            target: x86_64-pc-windows-msvc
+            cache-cross-binary: true
+            expect-file-re: "Windows.+x86-64"
+            expect-stripped: "--expect-stripped"
+            can-execute: true
+
+          - name: macOS-x86_64
+            runs-on: macOS-latest
+            target: x86_64-apple-darwin
+            cache-cross-binary: true
+            expect-file-re: "Mach-O.+x86_64"
+            expect-cross: ""
+            expect-stripped: "--expect-stripped"
+            can-execute: true
+
+          - name: macOS-aarch64
+            runs-on: macOS-latest
+            target: aarch64-apple-darwin
+            cache-cross-binary: true
+            expect-file-re: "Mach-O.+arm64"
+            expect-cross: ""
+            expect-stripped: "--expect-stripped"
+            can-execute: false
+
+    runs-on: ${{ matrix.platform.runs-on }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Copy test project to root
+        shell: bash
+        run: |
+          cp -a test-project/* .
+          rm -fr test-project
+      - name: Run both commands
+        uses: ./
+        with:
+          command: both
+          force-use-cross: ${{ matrix.platform.force-use-cross || false }}
+          cross-version: ${{ matrix.platform.cross-version }}
+          cache-cross-binary: ${{ matrix.platform.cache-cross-binary }}
+          target: ${{ matrix.platform.target }}
+          toolchain: ${{ matrix.platform.toolchain || 'stable' }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        if: ${{ matrix.platform.can-execute }}
+      - name: Run test command
+        uses: ./
+        with:
+          command: test
+          force-use-cross: ${{ matrix.platform.force-use-cross || false }}
+          cross-version: ${{ matrix.platform.cross-version }}
+          cache-cross-binary: ${{ matrix.platform.cache-cross-binary }}
+          target: ${{ matrix.platform.target }}
+          toolchain: ${{ matrix.platform.toolchain || 'stable' }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        if: ${{ matrix.platform.can-execute }}
+      - name: Run test command with args
+        uses: ./
+        with:
+          command: test
+          force-use-cross: ${{ matrix.platform.force-use-cross || false }}
+          cross-version: ${{ matrix.platform.cross-version }}
+          cache-cross-binary: ${{ matrix.platform.cache-cross-binary }}
+          target: ${{ matrix.platform.target }}
+          toolchain: ${{ matrix.platform.toolchain || 'stable' }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          args: "-- --ignored"
+        if: ${{ matrix.platform.can-execute }}
+      - name: Run build command
+        uses: ./
+        with:
+          command: build
+          force-use-cross: ${{ matrix.platform.force-use-cross || false }}
+          cross-version: ${{ matrix.platform.cross-version }}
+          cache-cross-binary: ${{ matrix.platform.cache-cross-binary }}
+          target: ${{ matrix.platform.target }}
+          toolchain: ${{ matrix.platform.toolchain || 'stable' }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          strip: true
+          # This is the default cache-provider. This is just added to make sure that we handle
+          # additional rust-cache parameters properly. See
+          # https://github.com/houseabsolute/actions-rust-cross/issues/46 for an example of how this
+          # was broken.
+          rust-cache-parameters: '{ "cache-provider": "github" }'
+      - name: Check binary and cross for main crate on ${{ matrix.platform.name }}
+        shell: bash
+        run: |
+          set -e
+          set -x
+          cargo run --manifest-path ./run-tests/Cargo.toml -- \
+              --checkout-root "$PWD" \
+              --target "${{ matrix.platform.target }}" \
+              --expect-file-re "${{ matrix.platform.expect-file-re }}" \
+              --expect-cross-version "${{ matrix.platform.expect-cross-version }}" \
+              ${{ matrix.platform.expect-cross }} \
+              ${{ matrix.platform.expect-stripped }}
+      - name: Run build command for subdir
+        uses: ./
+        with:
+          command: build
+          force-use-cross: ${{ matrix.platform.force-use-cross || false }}
+          cross-version: ${{ matrix.platform.cross-version }}
+          cache-cross-binary: ${{ matrix.platform.cache-cross-binary }}
+          working-directory: subcrate
+          target: ${{ matrix.platform.target }}
+          toolchain: ${{ matrix.platform.toolchain || 'stable' }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          strip: true
+      - name: Check binary and cross for subcrate on ${{ matrix.platform.name }}
+        shell: bash
+        run: |
+          set -e
+          set -x
+          cargo run --manifest-path ./run-tests/Cargo.toml -- \
+              --checkout-root "$PWD" \
+              --target "${{ matrix.platform.target }}" \
+              --expect-file-re "${{ matrix.platform.expect-file-re }}" \
+              --expect-cross-version "${{ matrix.platform.expect-cross-version }}" \
+              ${{ matrix.platform.expect-cross }} \
+              ${{ matrix.platform.expect-stripped }} \
+              --is-subcrate
+      - name: Run bench command
+        uses: ./
+        with:
+          command: bench
+          force-use-cross: ${{ matrix.platform.force-use-cross || false }}
+          cross-version: ${{ matrix.platform.cross-version }}
+          cache-cross-binary: ${{ matrix.platform.cache-cross-binary }}
+          target: ${{ matrix.platform.target }}
+          working-directory: bench
+          toolchain: ${{ matrix.platform.toolchain || 'stable' }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        if: ${{ matrix.platform.can-execute }}
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-artifacts-${{ matrix.platform.name }}
+          path: |
+            target/${{ matrix.platform.target }}/debug/bin*
+            subcrate/target/${{ matrix.platform.target }}/debug/subcrate
+
+  test-validate-inputs:
+    name: Test validate-inputs
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Run tests
+        shell: bash
+        run: ./validate-inputs.py --test
+
+  test-other-cargo-commands:
+    name: Test a "cargo foo" command
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Copy test project to root
+        shell: bash
+        run: |
+          cp -a test-project/* .
+          rm -fr test-project
+      - name: Create cargo-foo command
+        shell: bash
+        run: |
+          set -e
+          set -x
+
+          dir="${{ github.workspace }}/bin"
+          mkdir -p "$dir"
+
+          bin="$dir/cargo-foo"          
+
+          echo "#!/bin/bash" >> "$bin"
+          echo "echo 'This is cargo-foo!'" >> "$bin"
+          echo "exit 0" >> "$bin"
+          chmod 0755 "$bin"
+
+          echo "PATH=$dir:$PATH" >> "$GITHUB_ENV"
+      - name: Run cargo-foo command
+        uses: ./
+        with:
+          command: foo
+          target: x86_64-unknown-linux-gnu

.gitignore

@@ -3,3 +3,5 @@
 /package.json
 .\#*
 \#*\#
+run-tests/**/target/**
+test-project/**/target/**

CODE_OF_CONDUCT.md

@@ -2,17 +2,15 @@
 
 ## Our Pledge
 
-In the interest of fostering an open and welcoming environment, we as
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers
-contributors and maintainers pledge to making participation in our project and
+pledge to making participation in our project and our community a harassment-free experience for
-our community a harassment-free experience for everyone, regardless of age,
+everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level
-body size, disability, ethnicity, gender identity and expression, level of
+of experience, education, socio-economic status, nationality, personal appearance, race, religion,
-experience, education, socio-economic status, nationality, personal
+or sexual identity and orientation.
-appearance, race, religion, or sexual identity and orientation.
 
 ## Our Standards
 
-Examples of behavior that contributes to creating a positive environment
+Examples of behavior that contributes to creating a positive environment include:
-include:
 
 - Using welcoming and inclusive language
 - Being respectful of differing viewpoints and experiences
@@ -22,53 +20,46 @@ include:
 
 Examples of unacceptable behavior by participants include:
 
-- The use of sexualized language or imagery and unwelcome sexual attention or
+- The use of sexualized language or imagery and unwelcome sexual attention or advances
-  advances
 - Trolling, insulting/derogatory comments, and personal or political attacks
 - Public or private harassment
-- Publishing others' private information, such as a physical or electronic
+- Publishing others' private information, such as a physical or electronic address, without explicit
-  address, without explicit permission
+  permission
-- Other conduct which could reasonably be considered inappropriate in a
+- Other conduct which could reasonably be considered inappropriate in a professional setting
-  professional setting
 
 ## Our Responsibilities
 
-Project maintainers are responsible for clarifying the standards of acceptable
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are
-behavior and are expected to take appropriate and fair corrective action in
+expected to take appropriate and fair corrective action in response to any instances of unacceptable
-response to any instances of unacceptable behavior.
+behavior.
 
-Project maintainers have the right and responsibility to remove, edit, or
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits,
-reject comments, commits, code, wiki edits, issues, and other contributions
+code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or
-that are not aligned to this Code of Conduct, or to ban temporarily or
+to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate,
-permanently any contributor for other behaviors that they deem inappropriate,
 threatening, offensive, or harmful.
 
 ## Scope
 
-This Code of Conduct applies both within project spaces and in public spaces
+This Code of Conduct applies both within project spaces and in public spaces when an individual is
-when an individual is representing the project or its community. Examples of
+representing the project or its community. Examples of representing a project or community include
-representing a project or community include using an official project e-mail
+using an official project e-mail address, posting via an official social media account, or acting as
-address, posting via an official social media account, or acting as an
+an appointed representative at an online or offline event. Representation of a project may be
-appointed representative at an online or offline event. Representation of a
+further defined and clarified by project maintainers.
-project may be further defined and clarified by project maintainers.
 
 ## Enforcement
 
-Instances of abusive, harassing, or otherwise unacceptable behavior may be
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting
-reported by contacting the project team at autarch@urth.org. All complaints
+the project team at autarch@urth.org. All complaints will be reviewed and investigated and will
-will be reviewed and investigated and will result in a response that is deemed
+result in a response that is deemed necessary and appropriate to the circumstances. The project team
-necessary and appropriate to the circumstances. The project team is obligated
+is obligated to maintain confidentiality with regard to the reporter of an incident. Further details
-to maintain confidentiality with regard to the reporter of an incident.
+of specific enforcement policies may be posted separately.
-Further details of specific enforcement policies may be posted separately.
 
-Project maintainers who do not follow or enforce the Code of Conduct in good
+Project maintainers who do not follow or enforce the Code of Conduct in good faith may face
-faith may face temporary or permanent repercussions as determined by other
+temporary or permanent repercussions as determined by other members of the project's leadership.
-members of the project's leadership.
 
 ## Attribution
 
-This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at
-version 1.4, available at
 https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
 
 [homepage]: https://www.contributor-covenant.org

CONTRIBUTING.md

@@ -0,0 +1,20 @@
+# Contributing
+
+Thank you for your interest in contributing to this project. This file contains instructions that
+will help you work with the source code.
+
+Please note that if you have any questions or difficulties, you can reach the maintainer through
+GitHub Issues. Filing an issue is the preferred method for reporting bugs or issues with the
+development tool configuration for this project.
+
+If you'd like to suggest a small change, you can do that by directly creating a
+[Pull Request](https://docs.github.com/en/pull-requests). For larger changes, you are encouraged to
+file an issue first, so we can discuss the change before you spend too much time implementing it.
+
+Please note that the maintainer, Dave Rolsky (@autarch), mostly works on his FOSS projects in his
+free time, which means on weekends and days off. However, he does not work on these things _every_
+weekend, so it may be a little while before you get a response to your issue or PR.
+
+If it's been more than 3 weeks since you submitted an issue or PR, feel free to comment on the
+submission to nudge the maintainer, who is probably getting sucked into some new video game and
+spending all his time there.

Changes.md

@@ -1,3 +1,155 @@
+## 1.0.5 - 2025-07-20
+
+- Fixed a bug in the handling of the `rust-cache-parameters` input. If anything was specified for
+  this, it would end up providing a broken config to the `Swatinem/rust-cache` action. Reported by
+  @SinTan1729 (Sayantan Santra). GH #46.
+
+## 1.0.4 - 2025-04-12
+
+- Removed validation for the `toolchain` input. The
+  [dtolnay/rust-toolchain](https://github.com/dtolnay/rust-toolchain) accepts a lot of different
+  options that this action wasn't allowing. It's simpler and more flexible to just let that action
+  handle validation. Requested by @axos88 (Akos Vandra-Meyer). GH #42.
+- Removed validation for the `command` input. This allows you to use this action with any `cargo`
+  extension command, like `cargo-deb`. Setting `command` to `both` is still supported and will run
+  the `build` and `test` commands. Requested by @bvaisvil (Benjamin Vaisvil). GH #43.
+
+## 1.0.3 - 2025-02-17
+
+- Fixed a bug when running with a Linux ARM host where the action would use a cached `cross`
+  download for x86-64 Linux (or vice versa). Now the cache key for the `cross` binary includes the
+  runner's architecture in addition to its OS.
+- This release partially support running on Linxu ARM, but see the `README.md` file for details on
+  this.
+
+## 1.0.2 - 2025-02-16
+
+- Added a new `force-use-cross` input, which does what it says. It will force the use of `cross`
+  even when it is not required for given platform/target combination. Note that this only works on
+  Linux hosts.
+
+## 1.0.1 - 2025-01-20
+
+- Fixed a bug where this action would attempt to use `cross` when compiling for an ARM Linux target
+  on an ARM Linux host.
+
+## 1.0.0 - 2025-01-11
+
+The addition of caching is a significant behavior change for this action, so the version has been
+bumped to v1.0.0 because of this change.
+
+- This action will now configure and use `Swatinem/rust-cache` by default for you. It will include
+  the `target` parameter as part of the cache key automatically, as well as the OS version when
+  using `cargo` on Linux. Suggested by @jennydaman (Jennings Zhang). GH #23.
+- This action now validates its input and will exit early if they are not valid. GH #35.
+- When compiling for `musl` targets, this action will not try to reinstall the `musl-tools` package
+  if it's already installed.
+
+The following changes were made since the 1.0.0-beta1 release:
+
+- The cache key includes information that causes the cache to not be re-used when the system running
+  `cargo` or `cross` changes. When using `cargo` on Linux, this is the OS version, like "Ubuntu
+  22.04". When using `cross`, this is the hash of the `cross` binary itself. This is needed because
+  the Docker images that `cross` uses can change when the binary is updated. This can include
+  changing the underlying Docker image base OS, in which case it's quite likely the old cache
+  contents would be incompatible with the the new image.
+
+## 1.0.0-beta1 - 2024-12-21
+
+The addition of caching is a significant behavior change for this action, so the version has been
+bumped to v1.0.0 because of this change.
+
+- This action will now configure and use `Swatinem/rust-cache` by default for you. It will include
+  the `target` parameter as part of the cache key automatically. Suggested by @jennydaman (Jennings
+  Zhang). GH #23.
+- This action now validates its inputs and will exit early if they are not valid. GH #35.
+
+## 0.0.17 - 2024-11-23
+
+- Added support for running `cargo bench` or `cross bench`. Implemented by @RaulTrombin (Raul Victor
+  Trombin). GH #32.
+
+## 0.0.16 - 2024-11-17
+
+- Arguments passed in the `args` parameter are now always last when executing `cargo`. This lets you
+  pass arguments to test binaries like `-- --something`. First reported by @mateocabanal (Mateo
+  Cabanal) as GH #12 and fully fixed by @donatello (Aditya Manthramurthy) in GH #30.
+
+## 0.0.15 - 2024-09-21
+
+- The `musl` packages are only installed when not cross-compiling.
+
+## 0.0.14 - 2024-08-25
+
+- When the given `target` includes the string `musl`, this action will install the `musl-tools`
+  package. This allows crates with C or C++ code to compile properly. Fixes #20. Reported by Matteo
+  Pietro Dazzi (@ilteoood).
+
+## 0.0.13 - 2024-05-18
+
+- It's now possible to set `cross-version` to a git ref like a commit hash or `HEAD`. This will
+  install `cross` from its git repo.
+
+## 0.0.12 - 2024-02-25
+
+- Bumped the version of `actions/cache` used in this action to v4. The v3 version uses Node 16,
+  which causes warnings when run. Implemented by @hms5232. GH #13.
+
+## 0.0.11 - 2023-12-17
+
+- Use `cross` when compiling for 32-bit Linux targets. While in theory this should work without
+  `cross`, compiling `openssl` with the `vendored` feature fails when we run
+  `cargo build --target i686-unknown-linux-musl`.
+
+## 0.0.10 - 2023-12-10
+
+- Fixed handling of crates with multiple binaries. Attempting to strip binaries for such a crate
+  caused the build to fail. Reported by Tomaž Hribernik. GH #8
+- Added a new `cross-version` parameter. This can be specified to make this action use a specific
+  version of `cross`. If this is not specified, the latest version will be used.
+
+## 0.0.9 - 2023-09-10
+
+- Added a `working-directory` parameter. By default this is the current directory (`.`) but you can
+  set it to something else to compile a single crate or workspace in a subdirectory of the repo.
+  This allows you to use this action with monorepos with multiple crates. Based on GH #7 by
+  @aaronvg.
+
+## 0.0.8 - 2023-07-22
+
+- For builds that need the `cross` binary, this binary is now cached. A cache hit saves about 20
+  seconds in my tests. Suggested by @timon-schelling. GH #4.
+
+## 0.0.7 - 2023-04-21
+
+- The toolchain argument was (probably) not being respected with cross builds, though it's hard to
+  be sure since none of the output from past CI runs I've looked at it includes the toolchain
+  version in the output. But now the toolchain version is explicitly passed to all `cargo` and
+  `cross` commands.
+
+## 0.0.6 - 2023-04-21
+
+- When the `strip` parameter was true, stripping binaries could fail if there were both
+  `target/*/debug` and `target/*/release` directories present and the `debug` directory didn't have
+  a binary. Now it will strip all binaries it finds under `target`.
+
+## 0.0.5 - 2023-03-19
+
+- Fix use of `dtolnay/rust-toolchain` action to allow passing a `toolchain` input.
+
+## 0.0.4 - 2023-03-19
+
+- Added a new `toolchain` parameter to allow selecting a Rust toolchain other than stable. This
+  supports picking on of "stable", "beta", or "nightly".
+- Fixed binary stripping to work in more situations. Previously it depended on a very specific setup
+  plus expected to be run in the context of the matrix I use for my own projects.
+- Fixed a reference to a matrix variable that should have referenced an input variable.
+
+## 0.0.3 - 2023-03-17
+
+- This action now supports running the `build` and `test` commands, or both, with a new input
+  parameter, `command`. The default is `build`.
+
 ## 0.0.2 - 2023-03-05
 
 - Fixed some typos in the `README.md` documentation.

GOVERNANCE.md

@@ -0,0 +1,12 @@
+# Project Governance
+
+This repository works through the BDFL – Benevolent Dictator For Life - model. That means that a
+single maintainer, Dave Rolsky (@autarch), holds all of the admin keys and write access for this
+repository. Other users are encouraged to open issues, submit Pull Requests, and to ask for
+recognition as maintainers, but all decisions ultimately lie with the core maintainer.
+
+This maintainer is open to others joining on the admin team for this repository, but prospective
+admins will need a track record of contributions in the form of PRs and issue responses first.
+
+Please see the [CONTRIBUTING.md](CONTRIBUTING.md) file for more details on how to file issues and
+PRs for this project.

README.md

@@ -3,64 +3,109 @@
 This action lets you easily cross-compile Rust projects using
 [cross](https://github.com/cross-rs/cross).
 
-Here's an example from the release workflow for
+Here's a simplified example from the test and release workflow for
-[my tool `precious`](https://github.com/houseabsolute/precious):
+[my tool `ubi`](https://github.com/houseabsolute/ubi):
 
 ```yaml
 jobs:
   release:
-    name: Release - ${{ matrix.platform.release_for }}
+    name: Release - ${{ matrix.platform.os-name }}
     strategy:
       matrix:
         platform:
-          - release_for: FreeBSD-x86_64
+          - os-name: FreeBSD-x86_64
-            os: ubuntu-20.04
+            runs-on: ubuntu-24.04
             target: x86_64-unknown-freebsd
-            bin: precious
-            name: precious-FreeBSD-x86_64.tar.gz
 
-          - release_for: Windows-x86_64
+          - os-name: Linux-x86_64
-            os: windows-latest
+            runs-on: ubuntu-24.04
+            target: x86_64-unknown-linux-musl
+
+          - os-name: Linux-aarch64
+            runs-on: ubuntu-24.04
+            target: aarch64-unknown-linux-musl
+
+          - os-name: Linux-riscv64
+            runs-on: ubuntu-24.04
+            target: riscv64gc-unknown-linux-gnu
+
+          - os-name: Windows-x86_64
+            runs-on: windows-latest
             target: x86_64-pc-windows-msvc
-            bin: precious.exe
-            name: precious-Windows-x86_64.zip
 
-          - release_for: macOS-x86_64
+          - os-name: macOS-x86_64
-            os: macOS-latest
+            runs-on: macOS-latest
             target: x86_64-apple-darwin
-            bin: precious
-            name: precious-Darwin-x86_64.tar.gz
 
-            # more release targets here ...
+          # more targets here ...
 
-    runs-on: ${{ matrix.platform.os }}
+    runs-on: ${{ matrix.platform.runs-on }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Build binary
-        uses: houseabsolute/actions-rust-cross@v0
+        uses: houseabsolute/actions-rust-cross@v1
         with:
+          command: build
           target: ${{ matrix.platform.target }}
           args: "--locked --release"
           strip: true
-
+      - name: Publish artifacts and release
-    # more packaging stuff goes here ...
+        uses: houseabsolute/actions-rust-release@v0
+        with:
+          executable-name: ubi
+          target: ${{ matrix.platform.target }}
 ```
 
+Note that for Linux or BSD targets, you should always set the `runs-on` key to a Linux x86-64
+architecture runner.
+
+If you _only_ want to do native ARM compilation, for example using the `ubuntu-24.04-arm` runner,
+then there's no need to use this action. However, if you want to compile for _many_ platforms,
+including Linux ARM, using this action will simplify your config. This action is only tested on
+Ubuntu x86-64, Windows, and macOS runners.
+
 ## Input Parameters
 
 This action takes the following parameters:
 
 | Key                     | Type                        | Required? | Description                                                                                                                                                                                                                                                                                                                                   |
-| -------------- | --------------------------- | --------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
+| ----------------------- | --------------------------- | --------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `target`       | string                      | yes       | The target triple to compile for. This should be one of the targets listed by running `rustup target list`.                               |
+| `command`               | string                      | no        | The command(s) to run. The default is `build`. Running the `test` command will fail with \*BSD targets and non-x86 Windows. You can use any command supported by `cargo` and/or `cross`. For example, if you install `cargo-deb`, the command can be `deb`. Use the special string "both" to run both `build` and `test.                      |
+| `target`                | string                      | yes       | The target triple to compile for. This should be one of the targets found by running `rustup target list`.                                                                                                                                                                                                                                    |
+| `working-directory`     | string                      | no        | The working directory in which to run the `cargo` or `cross` commands. Defaults to the current directory (`.`).                                                                                                                                                                                                                               |
+| `toolchain`             | string)                     | no        | The Rust toolchain version to install. This is passed directly to [dtolnay/rust-toolchain](https://github.com/dtolnay/rust-toolchain), which accepts many different options. See its documentation for more details. The default is `stable`.                                                                                                 |
 | `GITHUB_TOKEN`          | string                      | no        | Defaults to the value of `${{ github.token }}`.                                                                                                                                                                                                                                                                                               |
 | `args`                  | string                      | no        | A string-separated list of arguments to be passed to `cross build`, like `--release --locked`.                                                                                                                                                                                                                                                |
-| `strip`        | boolean (`true` or `false`) | no        | If this is true, then the resulting binary will be stripped if possible. This is only possible for binaries which weren't cross-compiled. |
+| `strip`                 | boolean (`true` or `false`) | no        | If this is true, then the resulting binaries will be stripped if possible. This is only possible for binaries which weren't cross-compiled.                                                                                                                                                                                                   |
+| `cross-version`         | string                      | no        | This can be used to set the version of `cross` to use. If specified, it should be a specific `cross` release tag (like `v0.2.3`) or a git ref (commit hash, `HEAD`, etc.). If this is not set then the latest released version will always be used. If this is set to a git ref then the version corresponding to that ref will be installed. |
+| `force-use-cross`       | boolean (`true` or `false`) | no        | If this is true, then the action will use `cross` even if it is not needed for the given target. If this is set to `true`, then the resulting binary will not be stripped, regardless of whether `strip` is `true` or not. This only works on Linux hosts. Forcing the use of `cross` on other hosts is not supported.                        |
+| `use-rust-cache`        | boolean                     | no        | Whether or not to use [the `Swatinem/rust-cache@v2` action](https://github.com/Swatinem/rust-cache). This defaults to true.                                                                                                                                                                                                                   |
+| `rust-cache-parameters` | string (containing JSON)    | no        | This must be a string containing valid JSON. The JSON should be an object where the keys are the parameters for [the `Swatinem/rust-cache@v2` action](https://github.com/Swatinem/rust-cache).                                                                                                                                                |
+
+### Setting Environment Variables
+
+By default, `cross` passes most rust-related environment variables through when it runs `cargo` in a
+Docker image. This means you can simply set an `env` key in the workflow step that uses this action.
+
+```
+- name: Run build command
+  uses: houseabsolute/actions-rust-cross@v1
+  env:
+    CARGO_LOG: debug
+    RUSTFLAGS: "-g"
+  with:
+    command: build
+```
+
+If you want to pass other environment variables through, you will need to configure `cross` to do
+see. See the
+[`cross` docs](https://github.com/cross-rs/cross/blob/main/docs/environment_variables.md#environment-variable-passthrough)
+for more details.
 
 ## How it Works
 
-Under the hood, this action will compile your binary with either `cargo` or `cross`, depending on
+Under the hood, this action will compile your binaries with either `cargo` or `cross`, depending on
 the host machine and target. For Linux builds, it will always use `cross` except for builds
 targeting an x86 architecture like `x86_64` or `i686`.
 
@@ -74,6 +119,85 @@ build `cross`.
 When compiling on Windows, it will do so in a Powershell environment, which can matter in some
 corner cases, like compiling the `openssl` crate with the `vendored` feature.
 
-Finally, it will run `strip` to strip the binary if the `strip` parameter is true. This is only
+When running `cargo` on a Linux system, it will also include the output of running
-possible for builds that are not done via `cross`. In addition, Windows builds for `aarch64` cannot
+`lsb_release --short --description` in the cache key. This is important for crates that link against
-be stripped either.
+system libraries. If those library versions change across OS versions (e.g. Ubuntu 20.04 to 22.04),
+then the cache will be broken for these cases.
+
+When running `cross`, the hash of the `cross` binary will be included in the cache key. This is done
+because the Docker images that `cross` uses can change when `cross` is updated. We want to make sure
+that we do not re-use the cache across changes when these images change.
+
+Finally, it will run `strip` to strip the binaries it builds if the `strip` parameter is true. This
+is only possible for builds that are not done via `cross`. In addition, Windows builds for `aarch64`
+cannot be stripped either.
+
+### Caching
+
+By default, this action will use
+[the `Swatinem/rust-cache@v2` action](https://github.com/Swatinem/rust-cache) to cache compiled
+dependencies for a crate. Note that per the documentation for the `rust-cache` action, it has fairly
+limited value for crates without a `Cargo.lock` file. The `key` parameter passed to this action will
+always include the value of the `target` input. If you specify a `key` parameter in
+`rust-cache-parameters`, then the `target` input will be appended to the value you specify.
+
+#### Weird Caching Issue with Multiple Crates
+
+In my testing, it seemed like in some cases restoring the cache would delete existing files in a
+`target` directory. This manifested with this sequence of actions:
+
+1. Run `actions-rust-cross` to compile a crate in a top-level directory.
+2. Run `actions-rust-cross` to compile a crate in a subdirectory.
+
+After step 2, the compiled binaries from step 1 were no longer present, _sometimes_. I'm not sure
+exactly what's going on here, but my recommendation is to structure your workflows so that this
+cannot affect you.
+
+For example, if you have multiple crates, each of which builds a binary you want to release, then
+you can avoid this issue by structuring your workflow as follows:
+
+1. Run `actions-rust-cross` to compile crate A.
+2. Run the release steps for crate A.
+3. Run `actions-rust-cross` to compile crate B.
+4. Run the release steps for crate B.
+
+When structured this way, it does not matter if the output of crate A is deleted in step 3.
+
+## Cross-Compiling from Linux ARM Runners
+
+In theory, this should work, and this action does implement some of the necessary work for this.
+However, there are a couple issues with this:
+
+1. As of 2025-02-17, the `cross` project does not publish Linux ARM binary releases. That means that
+   in order to use `cross` on a Linux ARM runner as part of this action, you must set
+   `cross-version` to a more recent commit from the `cross` repo.
+2. There is
+   [a bug in `cross` that means you must use a custom Docker image](https://github.com/cross-rs/cross/issues/1628)
+   when cross-compiling from a Linux ARM runner. See
+   [this other `cross` issue](https://github.com/cross-rs/cross/issues/751) for more details.
+
+## Linting and Tidying this Code
+
+The code in this repo is linted and tidied with
+[`precious`](https://github.com/houseabsolute/precious). This repo contains a `mise.toml` file.
+[Mise](https://mise.jdx.dev/) is a tool for managing dev tools with per-repo configuration. You can
+install `mise` and use it to run `precious` as follows:
+
+```
+# Installs mise
+curl https://mise.run | sh
+# Installs precious and other dev tools
+mise install
+```
+
+Once this is done, you can run `precious` via `mise`:
+
+```
+# Lints all code
+mise exec -- precious lint -a
+# Tidies all code
+mise exec -- precious tidy -a
+```
+
+If you want to use `mise` for other projects, see [its documentation](https://mise.jdx.dev/) for
+more details on how you can configure your shell to always activate `mise`.

SECURITY.md

@@ -0,0 +1,9 @@
+# Reporting Security Issues
+
+To report a security issue, please use the GitHub Security Advisory "Report a Vulnerability" tab.
+
+The project maintainer(s) will send a response indicating the next steps in handling your report.
+After the initial reply to your report, the maintainer(s) will keep you informed of the progress
+towards a fix and full announcement, and may ask for additional information or guidance.
+
+Report security bugs in third-party packages to the person or team maintaining the package.

SUPPORT.md

@@ -0,0 +1,7 @@
+# How to file issues and get help
+
+This project uses GitHub Issues to track bugs and feature requests. Please search the existing
+issues before filing new issues to avoid duplicates. For new issues, file your bug or feature
+request as a new Issue.
+
+For help and questions about using this project, you can use GitHub Issues as well.

action.yml

@@ -1,74 +1,229 @@
 name: "Build Rust Projects with Cross"
 author: "Dave Rolsky <autarch@urth.org>"
+
 branding:
   icon: home
   color: gray-dark
+
 description: |
   Cross compile your Rust projects with cross (https://github.com/cross-rs/cross).
+
 inputs:
   target:
     description: The target platform
     required: true
+
+  command:
+    description: |
+      The commands to run. Use "both" to run both "build" and "test".
+    default: build
+
+  toolchain:
+    description: |
+      The target toolchain to use.
+    default: stable
+
+  working-directory:
+    description: The working directory for each step
+    default: "."
+
   GITHUB_TOKEN:
     description: |
-      A GitHub token, available in the secrets.GITHUB_TOKEN context variable.
+      A GitHub token, available in the secrets.GITHUB_TOKEN working-directory variable.
     default: ${{ github.token }}
+
   args:
     description: |
       The arguments to be passed to cross or cargo when building, as a
       space-separated string.
     default: ""
+
   strip:
     description: Strip the compiled binary
     default: false
+
+  cross-version:
+    description: |
+      The version of cross to use. If not specified, then the latest version
+      will be used.
+
+  cache-cross-binary:
+    description: |
+      Cache the cross binary if one is installed. This is primarily for use in
+      tests of this action.
+    default: true
+
+  force-use-cross:
+    description: |
+      If this is true, the action will use cross even for targets where it is not needed.
+    default: false
+
+  use-rust-cache:
+    description: |
+      Use `Swatinem/rust-cache@v2`. Defaults to true.
+    default: true
+
+  rust-cache-parameters:
+    description: |
+      A JSON string containing parameters to pass to `Swatinem/rust-cache@v2`. You can use the
+      `toJSON()` function in your action to make passing this easier.
+    default: "{}"
+
 runs:
   using: composite
   steps:
+    - name: Show inputs
+      shell: bash
+      run: |
+        echo '${{ toJSON(inputs) }}'
+
     - name: Add this action's path to PATH
       shell: bash
       run: echo "${{ github.action_path }}" >> $GITHUB_PATH
+
+    - name: Validate inputs
+      shell: bash
+      run: |
+        "${{ github.action_path }}"/validate-inputs.py "${{ github.workspace }}"
+      env:
+        INPUTS_target: ${{ inputs.target }}
+        INPUTS_command: ${{ inputs.command }}
+        INPUTS_toolchain: ${{ inputs.toolchain }}
+        INPUTS_working_directory: ${{ inputs.working-directory }}
+        INPUTS_strip: ${{ inputs.strip }}
+        INPUTS_cache_cross_binary: ${{ inputs.cache-cross-binary }}
+        INPUTS_force_use_cross: ${{ inputs.force-use-cross }}
+        INPUTS_use_rust_cache: ${{ inputs.use-rust-cache }}
+        INPUTS_rust_cache_parameters: ${{ inputs.rust-cache-parameters }}
+
     - name: Determine whether we need to cross-compile
       id: determine-cross-compile
       shell: bash
-      run: set-cross-compile.sh ${{ inputs.target }}
+      run: set-cross-compile.py ${{ inputs.target }} ${{ inputs.force-use-cross }}
-    - name: Install toolchain if not cross-compiling
+
-      uses: dtolnay/rust-toolchain@stable
+    - name: Install toolchain
+      uses: dtolnay/rust-toolchain@master
       with:
-        targets: ${{ matrix.platform.target }}
+        targets: ${{ inputs.target }}
-      if: ${{ steps.determine-cross-compile.outputs.needs-cross == 'false' }}
+        toolchain: ${{ inputs.toolchain }}
+
+    - name: Install qemu-user emulator binaries if cross-compiling on arm64 host
+      shell: bash
+      run: |
+        set -e
+        set -x
+
+        docker run --privileged --rm tonistiigi/binfmt --install all
+      if: steps.determine-cross-compile.outputs.needs-cross == 'true' && runner.os == 'Linux' && contains(runner.arch, 'ARM')
+
+    - name: Determine cross version
+      id: determine-cross-version
+      shell: bash
+      run: determine-cross-version.sh "${{ inputs.cross-version }}"
+      env:
+        GITHUB_TOKEN: ${{ inputs.GITHUB_TOKEN }}
+      if: steps.determine-cross-compile.outputs.needs-cross == 'true'
+
+    # We need to access this in both this YAML config and shell scripts. It
+    # doesn't seem like using ${{ env.RUNNER_TEMP }} works in the YAML config.
+    - name: Set directory for installing cross
+      id: set-cross-dir
+      shell: bash
+      run: set-cross-dir.sh
+      if: steps.determine-cross-compile.outputs.needs-cross == 'true'
+
+    - name: Cache cross
+      id: cache-cross
+      uses: actions/cache@v4
+      with:
+        path: ${{ steps.set-cross-dir.outputs.cross-dir }}/cross
+        key: ${{ runner.os }}-${{ runner.arch }}-${{ steps.determine-cross-version.outputs.cross-version }}
+      if: steps.determine-cross-compile.outputs.needs-cross == 'true' && inputs.cache-cross-binary == 'true'
+
     - name: Install cross if cross-compiling (*nix)
       shell: bash
-      run: install-cross-nix.sh
+      run: install-cross-nix.sh ${{ steps.set-cross-dir.outputs.cross-dir }} ${{ steps.determine-cross-version.outputs.cross-version }}
-      if: ${{ steps.determine-cross-compile.outputs.needs-cross == 'true' && runner.os != 'Windows' }}
+      if: steps.determine-cross-compile.outputs.needs-cross == 'true' && steps.cache-cross.outputs.cache-hit != 'true'
-      env:
-        GITHUB_TOKEN: ${{ inputs.GITHUB_TOKEN }}
-    - name: Install cross if cross-compiling (Windows)
-      shell: powershell
-      run: install-cross-windows.ps1
-      if: ${{ steps.determine-cross-compile.outputs.needs-cross == 'true' && runner.os == 'Windows' }}
       env:
         GITHUB_TOKEN: ${{ inputs.GITHUB_TOKEN }}
+
+    - name: Install musl-tools on Linux if target includes "musl"
+      shell: bash
+      run: |
+        if dpkg -l musl-tools | grep -q "^ii\s*musl-tools"; then
+            exit 0
+        fi
+        sudo apt-get update --yes && \
+            sudo apt-get install --yes musl-tools
+      if: steps.determine-cross-compile.outputs.needs-cross != 'true' && contains(inputs.target, 'musl')
+
     - name: Set build command
       id: set-build-command
       shell: bash
-      run: set-build-command.sh
+      run: set-build-command.sh ${{ steps.set-cross-dir.outputs.cross-dir }}
-    - name: Build binary (*nix)
+
+    - name: Determine which cargo commands to run
+      id: determine-cargo-commands
+      shell: bash
+      run: determine-cargo-commands.sh ${{ inputs.command }}
+
+    - name: Parse `rust-cache-parameters` and set inputs for `Swatinem/rust-cache@v2`
+      id: parse-rust-cache-parameters
       shell: bash
       run: |
-        ${{ steps.set-build-command.outputs.build-command }} build ${{ inputs.args }} --target ${{ inputs.target }}
+        set -e
-      if: ${{ runner.os != 'Windows' }}
+        set -x
-    # We want to run in Powershell on Windows to make sure we compile in a
+        set -o pipefail
-    # native Windows environment. Some things won't compile properly under
+        OS_VERSION=""
-    # msys, notably OpenSSL, which is compiled locally when using the
+        if [ -x /usr/bin/lsb_release ]; then
-    # `openssl` crate with the `vendored` feature.
+            # This will be something like "Ubuntu 22.04.5 LTS"
-    - name: Build binary (Windows)
+            OS_VERSION="$( lsb_release --short --description )"
-      shell: powershell
+        fi
+        # This will get the inputs JSON from the `RUST_CACHE_PARAMETERS` env var. This avoids
+        # any string interpolation issues, since the inputs will contain quotes.
+        parse-and-set-rust-cache-parameters.py "${{ inputs.target }}" "${{ steps.set-build-command.outputs.build-command }}" "$OS_VERSION"
+      env:
+        RUST_CACHE_PARAMETERS: ${{ inputs.rust-cache-parameters }}
+      if: inputs.use-rust-cache == 'true'
+
+    - name: Cache cargo & target directories
+      uses: Swatinem/rust-cache@v2
+      with: ${{ steps.parse-rust-cache-parameters.outputs }}
+      if: inputs.use-rust-cache == 'true'
+
+    - name: Run cargo test
+      working-directory: ${{ inputs.working-directory }}
+      # We want to run in Powershell on Windows to make sure we compile in a native Windows
+      # environment. Some things won't compile properly under msys, notably OpenSSL, which is
+      # compiled locally when using the `openssl` crate with the `vendored` feature.
+      shell: ${{ runner.os == 'Windows' && 'powershell' || 'bash' }}
       run: |
-        & ${{ steps.set-build-command.outputs.build-command }} build ${{ inputs.args }} --target ${{ inputs.target }}
+        ${{ steps.set-build-command.outputs.build-command }} test --target ${{ inputs.target }} ${{ inputs.args }}
-      if: ${{ runner.os == 'Windows' }}
+      if: steps.determine-cargo-commands.outputs.test == 'true'
+
+    - name: Run cargo build
+      working-directory: ${{ inputs.working-directory }}
+      # We want to run in Powershell on Windows to make sure we compile in a native Windows
+      # environment. Some things won't compile properly under msys, notably OpenSSL, which is
+      # compiled locally when using the `openssl` crate with the `vendored` feature.
+      shell: ${{ runner.os == 'Windows' && 'powershell' || 'bash' }}
+      run: |
+        ${{ steps.set-build-command.outputs.build-command }} build --target ${{ inputs.target }} ${{ inputs.args }}
+      if: steps.determine-cargo-commands.outputs.build == 'true'
+
+    - name: Run cargo ${{ steps.determine-cargo-commands.outputs.command }}
+      working-directory: ${{ inputs.working-directory }}
+      # We want to run in Powershell on Windows to make sure we compile in a native Windows
+      # environment. Some things won't compile properly under msys, notably OpenSSL, which is
+      # compiled locally when using the `openssl` crate with the `vendored` feature.
+      shell: ${{ runner.os == 'Windows' && 'powershell' || 'bash' }}
+      run: |
+        ${{ steps.set-build-command.outputs.build-command }} ${{ steps.determine-cargo-commands.outputs.command }} --target ${{ inputs.target }} ${{ inputs.args }}
+      if: steps.determine-cargo-commands.outputs.command != ''
+
     - name: Strip binary
+      working-directory: ${{ inputs.working-directory }}
       shell: bash
-      run: |
+      run: strip-binary.sh ${{ inputs.target }}
-        strip target/${{ matrix.platform.target }}/release/${{ matrix.platform.bin }}
       # strip doesn't work with cross-arch binaries on Linux or Windows.
-      if: ${{ inputs.strip == 'true' && steps.determine-cross-compile.outputs.needs-cross == 'false' && inputs.target != 'aarch64-pc-windows-msvc' }}
+      if: inputs.command != 'test' && inputs.strip == 'true' && steps.determine-cross-compile.outputs.needs-cross == 'false' && inputs.target != 'aarch64-pc-windows-msvc'

determine-cargo-commands.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+set -e
+set -x
+set -o pipefail
+
+COMMAND="$1"
+if [ "$COMMAND" == 'both' ]; then
+    echo "build=true" >>"$GITHUB_OUTPUT"
+    echo "test=true" >>"$GITHUB_OUTPUT"
+else
+    echo "command=$COMMAND" >>"$GITHUB_OUTPUT"
+fi

determine-cross-version.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+set -e
+set -x
+set -o pipefail
+
+VERSION=$1
+
+if [ -z "$VERSION" ]; then
+    JSON=$(curl \
+        --request GET \
+        --header "Authorization: Bearer $GITHUB_TOKEN" \
+        https://api.github.com/repos/cross-rs/cross/releases/latest)
+    VERSION=$(echo "$JSON" | jq -r ".tag_name")
+fi
+
+echo "cross-version=$VERSION" >>"$GITHUB_OUTPUT"

dev/bin/install-dev-tools.sh

@@ -1,43 +0,0 @@
-#!/bin/bash
-
-set -eo pipefail
-
-function run () {
-    echo $1
-    eval $1
-}
-
-function install_tools () {
-    curl --silent --location \
-         https://raw.githubusercontent.com/houseabsolute/ubi/master/bootstrap/bootstrap-ubi.sh |
-        sh
-    run "rustup component add clippy"
-    run "ubi --project houseabsolute/precious --in ~/bin"
-    run "npm install prettier"
-}
-
-if [ "$1" == "-v" ]; then
-    set -x
-fi
-
-mkdir -p $HOME/bin
-
-set +e
-echo ":$PATH:" | grep --extended-regexp ":$HOME/bin:" >& /dev/null
-if [ "$?" -eq "0" ]; then
-    path_has_home_bin=1
-fi
-set -e
-
-if [ -z "$path_has_home_bin" ]; then
-    PATH=$HOME/bin:$PATH
-fi
-
-install_tools
-
-echo "Tools were installed into $HOME/bin."
-if [ -z "$path_has_home_bin" ]; then
-     echo "You should add $HOME/bin to your PATH."
-fi
-
-exit 0

git/hooks/pre-commit.sh

@@ -1,5 +1,6 @@
 #!/bin/bash
 
+declare -i status
 status=0
 
 PRECIOUS=$(which precious)
@@ -7,8 +8,7 @@ if [[ -z $PRECIOUS ]]; then
     PRECIOUS=./bin/precious
 fi
 
-"$PRECIOUS" lint -s
+if ! "$PRECIOUS" lint -s; then
-if (( $? != 0 )); then
     status+=1
 fi
 

git/setup.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+
+# This code was mostly written by Claude.ai.
+
+import os
+import sys
+
+
+def main() -> None:
+    """
+    Main entry point to create a pre-commit hook symlink.
+    """
+    symlink_hook("pre-commit")
+
+
+def symlink_hook(hook: str) -> None:
+    """
+    Create a symlink for a Git hook if it doesn't already exist.
+
+    Args:
+        hook: Name of the Git hook (e.g., 'pre-commit')
+    """
+    # Path to the hook in .git/hooks
+    dot_hook_path = os.path.join(".git", "hooks", hook)
+
+    # Path to the actual hook script
+    file_hook_path = os.path.join("git", "hooks", f"{hook}.sh")
+
+    # Relative symlink path
+    link_path = os.path.join("..", "..", file_hook_path)
+
+    # Check if the hook already exists
+    if os.path.exists(dot_hook_path):
+        # If it's already a symlink, check if it points to the correct location
+        if os.path.islink(dot_hook_path):
+            # If the existing symlink is correct, do nothing
+            if os.readlink(dot_hook_path) == link_path:
+                return
+
+        # If a hook exists and is not the expected symlink, warn and exit
+        print(f"You already have a hook at {dot_hook_path}!", file=sys.stderr)
+        return
+
+    # Create the symlink
+    try:
+        os.symlink(link_path, dot_hook_path)
+    except OSError as e:
+        print(f"Error creating symlink: {e}", file=sys.stderr)
+
+
+if __name__ == "__main__":
+    main()

install-cross-nix.sh

@@ -1,9 +1,30 @@
+#!/bin/bash
+
 set -e
 set -x
+set -o pipefail
+
+CROSS_DIR="$1"
+VERSION="$2"
+
+cd "$CROSS_DIR"
+
+if [[ -n $VERSION ]] && ! [[ $VERSION =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+    cargo install cross --git https://github.com/cross-rs/cross --rev "$VERSION" --force
+    mv "$HOME/.cargo/bin/cross" .
+    CROSS_NO_WARNINGS=0 ./cross --version
+    exit 0
+fi
+
+VERSION_ARGS=""
+if [ -n "$VERSION" ]; then
+    VERSION_ARGS="--tag $VERSION"
+fi
 
-cd "$RUNNER_TEMP"
 export TARGET=.
 curl --silent --location \
     https://raw.githubusercontent.com/houseabsolute/ubi/master/bootstrap/bootstrap-ubi.sh |
     sh
-./ubi --project cross-rs/cross --matching musl --in .
+# shellcheck disable=SC2086
+./ubi --project cross-rs/cross --matching musl --in . $VERSION_ARGS
+CROSS_NO_WARNINGS=0 ./cross --version

install-cross-windows.ps1

@@ -1,4 +0,0 @@
-cd $Env:RUNNER_TEMP
-Invoke-WebRequest -URI 'https://raw.githubusercontent.com/houseabsolute/ubi/master/bootstrap/bootstrap-ubi.ps1' -UseBasicParsing | Invoke-Expression
-.\ubi --project cross-rs/cross --in .
-

mise.toml

@@ -0,0 +1,10 @@
+[tools]
+node = "22.11.0"
+"npm:prettier" = "3.4.1"
+ruff = "0.8.3"
+shellcheck = "0.10.0"
+shfmt = "v3.10.0"
+taplo = "0.9.3"
+typos = "1.28.1"
+"ubi:houseabsolute/omegasort" = "v0.1.3"
+"ubi:houseabsolute/precious" = "v0.7.3"

parse-and-set-rust-cache-parameters.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+
+import json
+import os
+import sys
+import hashlib
+
+
+def main():
+    target = sys.argv[1]
+    build_command = sys.argv[2]
+
+    os_version = sys.argv[3]
+
+    parameters = json.loads(os.environ["RUST_CACHE_PARAMETERS"])
+    if "key" not in parameters:
+        parameters["key"] = target
+    else:
+        parameters["key"] += "-{}".format(target)
+
+    if build_command == "cargo":
+        # If we're running cargo, we need to add the OS version to the cache. Otherwise things that link
+        # against system packages, like openssl, can break when we use the same cache across different
+        # versions of the runner OS. For example, when going from Ubuntu 20.04 to 22.04, we move from
+        # OpenSSL 1.1.x to 3.x.
+        parameters["key"] += "-{}".format(os_version)
+    else:
+        # Otherwise we want to include the `cross` binary's hash. The Docker images that `cross`
+        # uses can change when the binary is updated. This protects us from using the same cache
+        # inside containers that have changed.
+        parameters["key"] += "-cross-binary-hash-{}".format(
+            get_file_hash(build_command)
+        )
+
+    file = os.environ["GITHUB_OUTPUT"]
+    with open(file, "w") as f:
+        for key, value in parameters.items():
+            f.write(f"{key}={value}\n")
+
+
+def get_file_hash(build_command):
+    with open(build_command, "rb") as f:
+        file_hash = hashlib.sha256()
+        while chunk := f.read(65536):
+            file_hash.update(chunk)
+            return file_hash.hexdigest()
+
+
+main()

perltidyrc

@@ -0,0 +1,22 @@
+-l=78
+-i=4
+-ci=4
+-se
+-b
+-bar
+-boc
+-vt=0
+-vtc=0
+-cti=0
+-pt=1
+-bt=1
+-sbt=1
+-bbt=1
+-nolq
+-npro
+-nsfs
+--blank-lines-before-packages=0
+--opening-hash-brace-right
+--no-outdent-long-comments
+--iterations=2
+-wbb="% + - * / x != == >= <= =~ !~ < > | & >= < = **= += *= &= <<= &&= -= /= |= >>= ||= .= %= ^= x="

precious.toml

@@ -1,11 +1,106 @@
 exclude = [
   "target",
+  "tests/lib/**/*",
 ]
 
-[commands.prettier]
+[commands.clippy]
+type = "lint"
+include = "**/*.rs"
+invoke = "once"
+path-args = "none"
+working-dir.chdir-to = "run-tests"
+cmd = [
+    "cargo",
+    "clippy",
+    "--color",
+    "always",
+    "--locked",
+    "--all-targets",
+    "--all-features",
+    "--",
+    "-D",
+    "clippy::pedantic",
+]
+ok_exit_codes = 0
+lint_failure_exit_codes = 101
+expect_stderr = true
+labels = ["default"]
+
+[commands."clippy --fix"]
+type = "tidy"
+include = "**/*.rs"
+invoke = "once"
+path-args = "none"
+working-dir.chdir-to = "run-tests"
+cmd = [
+    "cargo",
+    "clippy",
+    "--fix",
+    "--allow-dirty",
+    "--locked",
+    "--all-targets",
+    "--all-features",
+    "--",
+    "-D",
+    "clippy::pedantic",
+]
+ok_exit_codes = 0
+lint_failure_exit_codes = 101
+expect_stderr = true
+labels = ["default"]
+
+[commands.rustfmt]
 type = "both"
-include = [ "**/*.md", "**/*.yml" ]
+include = "**/*.rs"
-cmd     = [ "./node_modules/.bin/prettier", "--no-config" ]
+working-dir.chdir-to = "run-tests"
+cmd = ["rustfmt", "--edition", "2021"]
+lint_flags = "--check"
+ok_exit_codes = [0]
+lint_failure_exit_codes = [1]
+labels = ["default", "fast-tidy"]
+
+[commands."ruff for linting"]
+type = "both"
+include = [ "**/*.py" ]
+cmd = "ruff"
+lint_flags = [ "check" ]
+tidy_flags = [ "check", "--fix" ]
+ok_exit_codes = 0
+lint_failure_exit_codes = 1
+
+[commands."ruff for tidying"]
+type = "both"
+include = [ "**/*.py" ]
+cmd = "ruff"
+lint_flags = [ "format", "--check" ]
+tidy_flags = [ "format" ]
+ok_exit_codes = 0
+lint_failure_exit_codes = 1
+
+[commands.typos]
+type = "both"
+include = "**/*"
+exclude = "**/*.tar.gz"
+invoke = "once"
+cmd = "typos"
+tidy_flags = "--write-changes"
+ok-exit-codes = 0
+lint-failure-exit-codes = 2
+
+[commands.prettier-md]
+type    = "both"
+include = [ "**/*.md" ]
+cmd     = [ "prettier", "--no-config", "--print-width", "100", "--prose-wrap", "always" ]
+lint_flags = "--check"
+tidy_flags = "--write"
+ok_exit_codes = 0
+lint_failure_exit_codes = 1
+ignore_stderr = [ "Code style issues" ]
+
+[commands.prettier-yml]
+type    = "both"
+include = [ "**/*.yml" ]
+cmd     = [ "prettier", "--no-config" ]
 lint_flags = "--check"
 tidy_flags = "--write"
 ok_exit_codes = 0
@@ -24,3 +119,19 @@ ignore_stderr = [
     "The .+ file is not sorted",
     "The .+ file is not unique",
 ]
+
+[commands.shellcheck]
+type = "lint"
+include = "**/*.sh"
+cmd = "shellcheck"
+ok_exit_codes = 0
+lint_failure_exit_codes = 1
+
+[commands.shfmt]
+type = "both"
+include = "**/*.sh"
+cmd = ["shfmt", "--simplify", "--indent", "4"]
+lint_flags = "--diff"
+tidy_flags = "--write"
+ok_exit_codes = 0
+lint_failure_exit_codes = 1

run-tests/Cargo.lock

@@ -0,0 +1,315 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "aho-corasick"
+version = "1.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ddd31a130427c27518df266943a5308ed92d4b226cc639f5a8f1002816174301"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "anstream"
+version = "0.6.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43d5b281e737544384e969a5ccad3f1cdd24b48086a0fc1b2a5262a26b8f4f4a"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5192cca8006f1fd4f7237516f40fa183bb07f8fbdfedaa0036de5ea9b0b45e78"
+
+[[package]]
+name = "anstyle-parse"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4e7644824f0aa2c7b9384579234ef10eb7efb6a0deb83f9630a49594dd9c15c2"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc"
+dependencies = [
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "3.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d"
+dependencies = [
+ "anstyle",
+ "once_cell_polyfill",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "clap"
+version = "4.5.53"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9e340e012a1bf4935f5282ed1436d1489548e8f72308207ea5df0e23d2d03f8"
+dependencies = [
+ "clap_builder",
+ "clap_derive",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.5.53"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d76b5d13eaa18c901fd2f7fca939fefe3a0727a953561fefdf3b2922b8569d00"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.5.49"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a0b5487afeab2deb2ff4e03a807ad1a03ac532ff5a2cee5d86884440c7f7671"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
+
+[[package]]
+name = "colorchoice"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b05b61dc5112cbb17e4b6cd61790d9845d13888356391624cbe7e41efeac1e75"
+
+[[package]]
+name = "heck"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
+
+[[package]]
+name = "is_executable"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baabb8b4867b26294d818bf3f651a454b6901431711abb96e296245888d6e8c4"
+dependencies = [
+ "windows-sys 0.60.2",
+]
+
+[[package]]
+name = "is_terminal_polyfill"
+version = "1.70.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6cb138bb79a146c1bd460005623e142ef0181e3d0219cb493e02f7d08a35695"
+
+[[package]]
+name = "memchr"
+version = "2.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f52b00d39961fc5b2736ea853c9cc86238e165017a493d1d5c8eac6bdc4cc273"
+
+[[package]]
+name = "once_cell_polyfill"
+version = "1.70.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "384b8ab6d37215f3c5301a95a4accb5d64aa607f1fcb26a11b5303878451b4fe"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.103"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ee95bc4ef87b8d5ba32e8b7714ccc834865276eab0aed5c9958d00ec45f49e8"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a338cc41d27e6cc6dce6cefc13a0729dfbb81c262b1f519331575dd80ef3067f"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "regex"
+version = "1.12.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "843bc0191f75f3e22651ae5f1e72939ab2f72a4bc30fa80a066bd66edefc24d4"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-automata",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5276caf25ac86c8d810222b3dbb938e512c55c6831a10f3e6ed1c93b84041f1c"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a2d987857b319362043e95f5353c0535c1f58eec5336fdfcf626430af7def58"
+
+[[package]]
+name = "run-tests"
+version = "0.1.0"
+dependencies = [
+ "clap",
+ "is_executable",
+ "regex",
+]
+
+[[package]]
+name = "strsim"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+
+[[package]]
+name = "syn"
+version = "2.0.111"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "390cc9a294ab71bdb1aa2e99d13be9c753cd2d7bd6560c77118597410c4d2e87"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9312f7c4f6ff9069b165498234ce8be658059c6728633667c526e27dc2cf1df5"
+
+[[package]]
+name = "utf8parse"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
+
+[[package]]
+name = "windows-link"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
+
+[[package]]
+name = "windows-sys"
+version = "0.60.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.61.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc"
+dependencies = [
+ "windows-link",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.53.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4945f9f551b88e0d65f3db0bc25c33b8acea4d9e41163edf90dcd0b19f9069f3"
+dependencies = [
+ "windows-link",
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a9d8416fa8b42f5c947f8482c43e7d89e73a173cead56d044f6a56104a6d1b53"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9d782e804c2f632e395708e99a94275910eb9100b2114651e04744e9b125006"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "960e6da069d81e09becb0ca57a65220ddff016ff2d6af6a223cf372a506593a3"
+
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa7359d10048f68ab8b09fa71c3daccfb0e9b559aed648a8f95469c27057180c"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e7ac75179f18232fe9c285163565a57ef8d3c89254a30685b57d83a38d326c2"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c3842cdd74a865a8066ab39c8a7a473c0778a3f29370b5fd6b4b9aa7df4a499"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ffa179e2d07eee8ad8f57493436566c7cc30ac536a3379fdf008f47f6bb7ae1"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d6bbff5f0aada427a1e5a6da5f1f98158182f26556f345ac9e04d36d0ebed650"

run-tests/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "run-tests"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+clap = { version = "4.5.53", features = ["derive"] }
+is_executable = "1.0.5"
+regex = "1.12.2"

run-tests/src/main.rs

@@ -0,0 +1,168 @@
+// Mostly written by Claude.ai.
+
+use clap::Parser;
+use is_executable::is_executable;
+use regex::Regex;
+use std::{
+    env,
+    path::{Path, PathBuf},
+    process::Command,
+};
+
+#[derive(Parser, Debug)]
+#[command(version, about, long_about = None)]
+struct Args {
+    #[arg(long)]
+    checkout_root: String,
+    #[arg(long)]
+    target: String,
+    #[arg(long)]
+    expect_file_re: Option<String>,
+    #[arg(long)]
+    expect_cross: bool,
+    #[arg(long)]
+    expect_cross_version: Option<String>,
+    #[arg(long)]
+    expect_stripped: bool,
+    #[arg(long)]
+    is_subcrate: bool,
+}
+
+fn main() {
+    let args = Args::parse();
+
+    let runner_temp = env::var("RUNNER_TEMP").expect("RUNNER_TEMP is not set");
+    let runner_temp_path = PathBuf::from(runner_temp);
+
+    check_cross(
+        &runner_temp_path,
+        args.expect_cross,
+        args.expect_cross_version.as_deref(),
+    );
+
+    let checkout_root_path = PathBuf::from(args.checkout_root);
+    let bin_paths = if args.is_subcrate {
+        vec![checkout_root_path
+            .join("subcrate")
+            .join("target")
+            .join(&args.target)
+            .join("debug")
+            .join("subcrate")]
+    } else {
+        vec![
+            checkout_root_path
+                .join("target")
+                .join(&args.target)
+                .join("debug")
+                .join("bin1"),
+            checkout_root_path
+                .join("target")
+                .join(&args.target)
+                .join("debug")
+                .join("bin2"),
+        ]
+    };
+
+    for mut bin_path in bin_paths {
+        if cfg!(windows) {
+            bin_path.set_extension("exe");
+        }
+        check_binary(
+            &bin_path,
+            args.expect_file_re.as_deref(),
+            args.expect_stripped,
+        );
+    }
+}
+
+fn check_cross(bin_dir: &Path, expect_cross: bool, expect_cross_version: Option<&str>) {
+    let cross_path = bin_dir.join("cross");
+
+    if expect_cross {
+        assert!(
+            cross_path.is_file(),
+            "`cross` exists at {}",
+            cross_path.display()
+        );
+
+        if let Some(expected_version) = expect_cross_version {
+            let output = Command::new(&cross_path)
+                .arg("--version")
+                .output()
+                .expect("Failed to execute `cross` command");
+            let version = String::from_utf8(output.stdout)
+                .expect("`cross --version` stdout was not valid UTF-8");
+            assert!(
+                version.contains(expected_version),
+                "`cross` version matches expected version: {expected_version}",
+            );
+        }
+    } else {
+        assert!(!cross_path.exists(), "`cross` was not downloaded");
+    }
+}
+
+fn check_binary(bin_path: &PathBuf, expect_file_re: Option<&str>, expect_stripped: bool) {
+    assert!(bin_path.exists(), "Binary at {} exists", bin_path.display());
+    assert!(
+        bin_path.is_file(),
+        "Binary at {} is a file",
+        bin_path.display()
+    );
+
+    assert!(
+        is_executable(bin_path),
+        "Binary at {} is executable",
+        bin_path.display()
+    );
+
+    let output = Command::new("file")
+        .arg("--brief")
+        .arg(bin_path)
+        .output()
+        .expect("Failed to execute `file` command");
+    let file_output = String::from_utf8_lossy(&output.stdout);
+    println!(
+        "output from `file` for {}: {file_output}",
+        bin_path.display(),
+    );
+
+    if let Some(file_re) = expect_file_re {
+        let re = Regex::new(file_re).expect("Invalid regex");
+        assert!(
+            re.is_match(&file_output),
+            "`file` output for {} matches `{file_re}`: `{file_output}`",
+            bin_path.display(),
+        );
+    }
+
+    // `file` on macOS doesn't report if the binary is stripped.
+    if cfg!(target_os = "macos") {
+        return;
+    }
+
+    if expect_stripped {
+        assert!(
+            !file_output.contains("not stripped"),
+            "`file` does not report {} as 'not stripped': `{file_output}`",
+            bin_path.display(),
+        );
+        assert!(
+            file_output.contains("stripped"),
+            "`file` reports {} as 'stripped': `{file_output}`",
+            bin_path.display(),
+        );
+    } else if cfg!(windows) {
+        assert!(
+            !file_output.contains("stripped"),
+            "`file` does not report {} as 'stripped': `{file_output}`",
+            bin_path.display(),
+        );
+    } else {
+        assert!(
+            file_output.contains("not stripped"),
+            "`file` reports {} as 'not stripped': `{file_output}`",
+            bin_path.display(),
+        );
+    }
+}

set-build-command.sh

@@ -1,8 +1,12 @@
+#!/bin/bash
+
 set -e
 set -x
+set -o pipefail
 
-if [ -f "$RUNNER_TEMP/cross" ]; then
+CROSS_DIR="$1"
-    echo "build-command=$RUNNER_TEMP/cross" >> $GITHUB_OUTPUT
+if [ -f "$CROSS_DIR/cross" ]; then
+    echo "build-command=$CROSS_DIR/cross" >>"$GITHUB_OUTPUT"
 else
-    echo "build-command=cargo" >> $GITHUB_OUTPUT
+    echo "build-command=cargo" >>"$GITHUB_OUTPUT"
 fi

set-cross-compile.py

@@ -0,0 +1,109 @@
+#!/usr/bin/env python3
+
+# Written mostly by Claude.ai based on my original bash script.
+
+import sys
+import platform
+import re
+import os
+from subprocess import run, PIPE, CalledProcessError
+
+
+def main() -> int:
+    """
+    Main function to determine cross-compilation requirements.
+
+    Returns:
+        Exit code (0 for success)
+    """
+    if len(sys.argv) < 3:
+        print(
+            "Error: Target architecture and force cross arguments are required",
+            file=sys.stderr,
+        )
+        return 1
+
+    target = sys.argv[1]
+    force_use_cross = sys.argv[2]
+    if force_use_cross == "true":
+        needs_cross = True
+    else:
+        needs_cross = check_needs_cross(target)
+
+    write_github_output(needs_cross)
+
+    return 0
+
+
+def check_needs_cross(target: str) -> bool:
+    """
+    Determine if cross-compilation is needed based on system and target.
+
+    Args:
+        target: Target architecture string
+
+    Returns:
+        Boolean indicating if cross-compilation is needed
+    """
+    system_info = get_uname_info().lower()
+
+    # Check if we're on macOS or Windows
+    if any(os in system_info for os in ["darwin", "msys", "windows"]):
+        return False
+
+    target = target.lower()
+
+    # Check for x86_64 Linux targets on x86_64 Linux host
+    if (
+        re.search(r"x86_64.+linux-(?:gnu|musl)", target)
+        and "x86_64" in system_info
+        and "linux" in system_info
+    ):
+        return False
+
+    # It's tempting to not use cross when the host is Linux x86-64 and we're compiling for Linux
+    # i586 or i686. This sort of works, but if there's any C being compiled, things get weird,
+    # because then we need 32-bit C headers, 32-bit C libs to link to, etc.
+
+    # Check if both host and target are ARM Linux. I'm assuming here that for things like
+    # "arm-linux-androideabi" or "armv7-unknown-linux-ohos" we'd still need cross.
+    if (
+        re.search(r"(?:aarch64|arm).+linux-(?:gnu|musl)", target)
+        and ("arm" in system_info or "aarch64" in system_info)
+        and "linux" in system_info
+    ):
+        return False
+
+    return True
+
+
+def get_uname_info() -> str:
+    """
+    Get system information using uname command.
+
+    Returns:
+        String containing system information
+    """
+    try:
+        result = run(["uname", "-a"], check=True, text=True, stdout=PIPE)
+        return result.stdout
+    except (CalledProcessError, FileNotFoundError):
+        # Fallback to platform.platform() if uname is not available
+        return platform.platform()
+
+
+def write_github_output(needs_cross: bool) -> None:
+    """
+    Write the needs-cross output to GITHUB_OUTPUT environment variable file.
+
+    Args:
+        needs_cross: Boolean indicating if cross-compilation is needed
+    """
+    github_output = os.getenv("GITHUB_OUTPUT")
+    if github_output:
+        with open(github_output, "a") as f:
+            f.write(f"needs-cross={str(needs_cross).lower()}\n")
+
+
+if __name__ == "__main__":
+    sys.exit(main())

set-cross-compile.sh

@@ -1,18 +0,0 @@
-set -e
-set -x
-
-TARGET="$1"
-
-# On macOS and Windows, we can cross-compile to all possible targets without
-# using cross.
-if uname -a | grep --quiet --extended-regexp -i "darwin|msys|windows"; then
-    echo "needs-cross=false" >> $GITHUB_OUTPUT
-    exit 0
-fi
-
-if echo "$TARGET" | grep --quiet --extended-regexp -i '(x86_64|586|686).+linux-(gnu|musl)'; then
-    echo "needs-cross=false" >> $GITHUB_OUTPUT
-    exit 0
-fi
-
-echo "needs-cross=true" >> $GITHUB_OUTPUT

set-cross-dir.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+set -e
+set -x
+set -o pipefail
+
+echo "cross-dir=$RUNNER_TEMP" >>"$GITHUB_OUTPUT"

strip-binary.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+set -e
+set -x
+set -o pipefail
+
+TARGET=$1
+did_strip=""
+
+strip_binary() {
+    if [[ $(uname -s) =~ "Darwin" ]]; then
+        stripped=$(
+            find "$1" -maxdepth 1 -type f -perm +111 | while read -r exe; do
+                strip "$exe"
+                echo "stripped $exe"
+            done
+        )
+    else
+        stripped=$(
+            find "$1" -maxdepth 1 -type f -executable | while read -r exe; do
+                strip "$exe"
+                echo "stripped $exe"
+            done
+        )
+    fi
+
+    if [ -z "$stripped" ]; then
+        echo "Could not find any binaries to strip in $1"
+    else
+        did_strip="true"
+    fi
+}
+
+for type in debug release; do
+    if [ -d "target/$TARGET/$type" ]; then
+        strip_binary "target/$TARGET/$type"
+    elif [ -d "target/$type" ]; then
+        strip_binary "target/$type"
+    fi
+done
+
+if [ -z "$did_strip" ]; then
+    echo "No binaries were stripped"
+    exit 1
+fi

test-project/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "test-project"
+version = "0.1.0"

test-project/Cargo.toml

@@ -0,0 +1,27 @@
+[package]
+name = "test-project"
+version = "0.1.0"
+edition = "2021"
+
+# For testing it would be nice to create a binary with spaces in the name, but
+# right now the `name` value must be a valid crate name, and there's no
+# separate setting for the compiled executable's name. See
+# https://github.com/rust-lang/cargo/issues/9778.
+[[bin]]
+name = "bin1"
+path = "src/bin1.rs"
+
+[[bin]]
+name = "bin2"
+path = "src/bin2.rs"
+
+# workaround for https://github.com/cross-rs/cross/issues/1345
+[package.metadata.cross.target.x86_64-unknown-netbsd]
+pre-build = [
+    "mkdir -p /tmp/netbsd",
+    "curl https://archive.netbsd.org/pub/NetBSD-archive/NetBSD-9.2/amd64/binary/sets/base.tar.xz -O",
+    "tar -C /tmp/netbsd -xJf base.tar.xz",
+    "cp /tmp/netbsd/usr/lib/libexecinfo.so /usr/local/x86_64-unknown-netbsd/lib",
+    "rm base.tar.xz",
+    "rm -rf /tmp/netbsd",
+]

test-project/bench/Cargo.lock

@@ -0,0 +1,651 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "aho-corasick"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "anes"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b46cbb362ab8752921c97e041f5e366ee6297bd428a31275b9fcf1e380f7299"
+
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
+
+[[package]]
+name = "bench"
+version = "0.1.0"
+dependencies = [
+ "criterion",
+]
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "bumpalo"
+version = "3.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
+
+[[package]]
+name = "cast"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "ciborium"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42e69ffd6f0917f5c029256a24d0161db17cea3997d185db0d35926308770f0e"
+dependencies = [
+ "ciborium-io",
+ "ciborium-ll",
+ "serde",
+]
+
+[[package]]
+name = "ciborium-io"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05afea1e0a06c9be33d539b876f1ce3692f4afea2cb41f740e7743225ed1c757"
+
+[[package]]
+name = "ciborium-ll"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57663b653d948a338bfb3eeba9bb2fd5fcfaecb9e199e87e1eda4d9e8b240fd9"
+dependencies = [
+ "ciborium-io",
+ "half",
+]
+
+[[package]]
+name = "clap"
+version = "3.2.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ea181bf566f71cb9a5d17a59e1871af638180a18fb0035c92ae62b705207123"
+dependencies = [
+ "bitflags",
+ "clap_lex",
+ "indexmap",
+ "textwrap",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2850f2f5a82cbf437dd5af4d49848fbdfc27c157c3d010345776f952765261c5"
+dependencies = [
+ "os_str_bytes",
+]
+
+[[package]]
+name = "criterion"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7c76e09c1aae2bc52b3d2f29e13c6572553b30c4aa1b8a49fd70de6412654cb"
+dependencies = [
+ "anes",
+ "atty",
+ "cast",
+ "ciborium",
+ "clap",
+ "criterion-plot",
+ "itertools",
+ "lazy_static",
+ "num-traits",
+ "oorandom",
+ "plotters",
+ "rayon",
+ "regex",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "tinytemplate",
+ "walkdir",
+]
+
+[[package]]
+name = "criterion-plot"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6b50826342786a51a89e2da3a28f1c32b06e387201bc2d19791f622c673706b1"
+dependencies = [
+ "cast",
+ "itertools",
+]
+
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test-project/bench/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "bench"
+version = "0.1.0"
+edition = "2021"
+
+[dev-dependencies]
+criterion = "0.4"
+
+[[bench]]
+name = "benchmark"
+harness = false

test-project/bench/benches/benchmark.rs

@@ -0,0 +1,16 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+
+fn fibonacci(n: u64) -> u64 {
+    match n {
+        0 => 1,
+        1 => 1,
+        n => fibonacci(n - 1) + fibonacci(n - 2),
+    }
+}
+
+fn criterion_benchmark(c: &mut Criterion) {
+    c.bench_function("fib 20", |b| b.iter(|| fibonacci(black_box(20))));
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);

test-project/bench/lib.rs

@@ -0,0 +1 @@
+

test-project/src/bin1.rs

@@ -0,0 +1,11 @@
+fn main() {
+    println!("Hello, world!");
+}
+
+#[cfg(test)]
+mod test {
+    #[test]
+    fn test_something() {
+        assert_eq!(1, 1);
+    }
+}

test-project/src/bin2.rs

@@ -0,0 +1,17 @@
+fn main() {
+    println!("Hello, world!");
+}
+
+#[cfg(test)]
+mod test {
+    #[test]
+    fn test_something() {
+        assert_eq!(1, 1);
+    }
+
+    #[test]
+    #[ignore]
+    fn test_something_ignored() {
+        assert_eq!(2, 2);
+    }
+}

test-project/subcrate/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "subcrate"
+version = "0.1.0"

test-project/subcrate/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "subcrate"
+version = "0.1.0"
+edition = "2021"
+
+# workaround for https://github.com/cross-rs/cross/issues/1345
+[package.metadata.cross.target.x86_64-unknown-netbsd]
+pre-build = [
+    "mkdir -p /tmp/netbsd",
+    "curl https://archive.netbsd.org/pub/NetBSD-archive/NetBSD-9.2/amd64/binary/sets/base.tar.xz -O",
+    "tar -C /tmp/netbsd -xJf base.tar.xz",
+    "cp /tmp/netbsd/usr/lib/libexecinfo.so /usr/local/x86_64-unknown-netbsd/lib",
+    "rm base.tar.xz",
+    "rm -rf /tmp/netbsd",
+]

test-project/subcrate/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world (subcrate)!");
+}

validate-inputs.py

@@ -0,0 +1,229 @@
+#!/usr/bin/env python3
+
+# Written by Claude.ai
+
+import os
+import json
+from pathlib import Path
+from typing import Dict, List, Union
+import tempfile
+import unittest
+
+boolean_flags = {"cache_cross_binary", "force_use_cross", "strip", "use_rust_cache"}
+
+
+class InputValidator:
+    """Validate inputs for a GitHub Action."""
+
+    def __init__(self, repo_root: Union[str, Path]):
+        """
+        Create a new InputValidator by collecting environment variables.
+
+        Args:
+            repo_root: Path to the repository root
+        """
+        self.repo_root = Path(repo_root)
+        self.inputs: Dict[str, str] = {
+            key.replace("INPUTS_", "").lower(): value
+            for key, value in os.environ.items()
+            if key.startswith("INPUTS_")
+        }
+
+    def validate(self) -> List[str]:
+        """
+        Validate all inputs according to specifications.
+
+        Returns:
+            List of validation errors. Empty list means all inputs are valid.
+        """
+        validation_errors: List[str] = []
+
+        # Check for required 'target' parameter
+        if "target" not in self.inputs:
+            validation_errors.append("'target' is a required parameter")
+
+        # Validate working directory if present
+        if "working_directory" in self.inputs:
+            path = Path(self.inputs["working_directory"])
+            if not path.is_absolute():
+                path = self.repo_root / path
+
+            if not path.exists():
+                validation_errors.append(
+                    f"'working-directory' does not exist: {self.inputs['working_directory']}"
+                )
+            elif not path.is_dir():
+                validation_errors.append(
+                    f"'working-directory' is not a directory: {self.inputs['working_directory']}"
+                )
+
+        # Validate boolean flags
+        for flag in boolean_flags:
+            if flag in self.inputs and self.inputs[flag] not in {"true", "false"}:
+                # Turn the underscores into dashes
+                dashes = flag.replace("_", "-")
+                validation_errors.append(f"'{dashes}' must be either 'true' or 'false'")
+
+        # Validate rust-cache-parameters JSON if present
+        if "rust_cache_parameters" in self.inputs:
+            try:
+                json.loads(self.inputs["rust_cache_parameters"])
+            except json.JSONDecodeError:
+                validation_errors.append("'rust-cache-parameters' must be valid JSON")
+
+        return validation_errors
+
+
+def main() -> None:
+    """Main function for running the validator."""
+    import sys
+
+    validator = InputValidator(sys.argv[1])
+    errors = validator.validate()
+
+    if not errors:
+        print("All inputs are valid.")
+        sys.exit(0)
+    else:
+        for error in errors:
+            print(error, file=sys.stderr)
+        sys.exit(1)
+
+
+class TestInputValidator(unittest.TestCase):
+    """Unit tests for the InputValidator."""
+
+    def setUp(self) -> None:
+        """Set up test environment."""
+        # Clear existing INPUTS_ environment variables
+        for key in list(os.environ.keys()):
+            if key.startswith("INPUTS_"):
+                del os.environ[key]
+
+    def setup_env(self, inputs: Dict[str, str]) -> None:
+        """Helper function to set up environment variables for testing."""
+        for key, value in inputs.items():
+            env_key = f"INPUTS_{key.upper().replace('-', '_')}"
+            os.environ[env_key] = value
+
+    def test_get_inputs_from_env(self) -> None:
+        """Test getting inputs from environment variables."""
+        inputs = {
+            "target": "x86_64-unknown-linux-gnu",
+            "command": "build",
+            "toolchain": "stable",
+            "use-rust-cache": "true",
+        }
+        self.setup_env(inputs)
+
+        validator = InputValidator("/root")
+        for key, value in validator.inputs.items():
+            self.assertEqual(value, inputs[key.replace("_", "-")])
+
+    def test_validate_missing_target(self) -> None:
+        """Test validation with missing target."""
+        self.setup_env({})
+        validator = InputValidator("/root")
+        errors = validator.validate()
+        self.assertTrue(errors)
+
+    def test_validate_valid_toolchain(self) -> None:
+        """Test validation of valid toolchains."""
+        valid_toolchains = [
+            "stable",
+            "beta",
+            "nightly",
+            "nightly-2025-03-17",
+            "stable 8 weeks ago",
+        ]
+
+        for toolchain in valid_toolchains:
+            self.setup_env(
+                {"target": "x86_64-unknown-linux-gnu", "toolchain": toolchain}
+            )
+            validator = InputValidator("/root")
+            errors = validator.validate()
+            self.assertFalse(errors, f"Toolchain '{toolchain}' should be valid")
+
+    def test_validate_working_directory(self) -> None:
+        """Test validation of working directory."""
+        with tempfile.TemporaryDirectory() as temp_dir:
+            # Test with valid directory
+            self.setup_env(
+                {"target": "x86_64-unknown-linux-gnu", "working-directory": temp_dir}
+            )
+            validator = InputValidator("/root")
+            errors = validator.validate()
+            self.assertFalse(errors)
+
+            # Test with non-existent directory
+            self.setup_env(
+                {
+                    "target": "x86_64-unknown-linux-gnu",
+                    "working-directory": "/path/to/nonexistent/directory",
+                }
+            )
+            validator = InputValidator("/root")
+            errors = validator.validate()
+            self.assertTrue(errors)
+
+            # Test with file instead of directory
+            with tempfile.NamedTemporaryFile() as temp_file:
+                self.setup_env(
+                    {
+                        "target": "x86_64-unknown-linux-gnu",
+                        "working-directory": temp_file.name,
+                    }
+                )
+                validator = InputValidator("/root")
+                errors = validator.validate()
+                self.assertTrue(errors)
+
+    def test_validate_boolean_flags(self) -> None:
+        """Test validation of boolean flags."""
+
+        # Test valid boolean values
+        for flag in boolean_flags:
+            for value in ["true", "false"]:
+                self.setup_env({"target": "x86_64-unknown-linux-gnu", flag: value})
+                validator = InputValidator("/root")
+                errors = validator.validate()
+                self.assertFalse(errors, f"'{flag}' with '{value}' should be valid")
+
+        # Test invalid boolean values
+        for flag in boolean_flags:
+            self.setup_env({"target": "x86_64-unknown-linux-gnu", flag: "invalid"})
+            validator = InputValidator("/root")
+            errors = validator.validate()
+            self.assertTrue(errors, f"'{flag}' with 'invalid' should be invalid")
+
+    def test_validate_rust_cache_parameters(self) -> None:
+        """Test validation of rust cache parameters."""
+        # Valid JSON
+        self.setup_env(
+            {
+                "target": "x86_64-unknown-linux-gnu",
+                "rust-cache-parameters": '{"key1":"value1","key2":"value2"}',
+            }
+        )
+        validator = InputValidator("/root")
+        errors = validator.validate()
+        self.assertFalse(errors)
+
+        # Invalid JSON
+        self.setup_env(
+            {
+                "target": "x86_64-unknown-linux-gnu",
+                "rust-cache-parameters": "{invalid json",
+            }
+        )
+        validator = InputValidator("/root")
+        errors = validator.validate()
+        self.assertTrue(errors)
+
+
+if __name__ == "__main__":
+    if len(os.sys.argv) > 1 and os.sys.argv[1] == "--test":
+        unittest.main(argv=["unittest"])
+    else:
+        main()