Update workflow

Compatibility with configuration sources used by other tools

.github/workflows/dockerhub-description.yml

@@ -0,0 +1,25 @@
+name: Update Docker Hub Description
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+    paths:
+      - README.md
+      - .github/workflows/dockerhub-description.yml
+jobs:
+  dockerHubDescription:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Copy README.md to TEST.md
+        run: |
+          mkdir -p some/path
+          mv README.md some/path/TEST.md
+      - name: Docker Hub Description
+        uses: ./
+        env:
+          DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+          DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
+          DOCKERHUB_REPOSITORY: peterevans/dockerhub-description
+          README_FILEPATH: ./some/path/TEST.md

Dockerfile

@@ -1,4 +1,4 @@
-FROM peterevans/curl-jq:1.0.0
+FROM peterevans/curl-jq:1.0.1
 
 LABEL maintainer="Peter Evans <mail@peterevans.dev>"
 LABEL repository="https://github.com/peter-evans/dockerhub-description"
@@ -9,7 +9,7 @@ LABEL com.github.actions.description="An action to update a Docker Hub repositor
 LABEL com.github.actions.icon="upload"
 LABEL com.github.actions.color="blue"
 
-COPY LICENSE README.md
+COPY LICENSE README.md /
 
 COPY entrypoint.sh /entrypoint.sh
 

README.md

@@ -1,4 +1,5 @@
 # Docker Hub Description
+[![GitHub Marketplace](https://img.shields.io/badge/Marketplace-Docker%20Hub%20Description-blue.svg?colorA=24292e&colorB=0366d6&style=flat&longCache=true&logo=data:image/png;base64,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)](https://github.com/marketplace/actions/docker-hub-description)
 
 A GitHub action to update a Docker Hub repository description from `README.md`.
 
@@ -6,68 +7,96 @@ This is useful if you `docker push` your images to Docker Hub. It provides an ea
 
 ## Usage
 
-```
+```yml
-action "Update Docker Hub Repository Description" {
+    - name: Docker Hub Description
-  uses = "peter-evans/dockerhub-description@master"
+      uses: peter-evans/dockerhub-description@v2
-  secrets = ["DOCKERHUB_USERNAME", "DOCKERHUB_PASSWORD", "DOCKERHUB_REPOSITORY"]
+      env:
-}
+        DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+        DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
+        DOCKERHUB_REPOSITORY: peterevans/dockerhub-description
 ```
 
-#### Required secrets
+#### Required environment variables
 
-- `DOCKERHUB_USERNAME` - Docker Hub username
+- `DOCKERHUB_USERNAME` - Docker Hub username. If updating a Docker Hub repository belonging to an organization, this user must have `Admin` permissions for the repository. Aliases: `DOCKER_USERNAME`
-- `DOCKERHUB_PASSWORD` - Docker Hub password
+- `DOCKERHUB_PASSWORD` - Docker Hub password. Fallback to `DOCKER_PASSWORD` if set. Aliases: `DOCKER_PASSWORD`
-- `DOCKERHUB_REPOSITORY` - The name of the Docker Hub repository to update. (This may also be an environment variable if not considered sensitive)
+- `DOCKERHUB_REPOSITORY` - The Docker Hub repository to update in the format `<namespace>/<name>`. May also be passed as a secret if considered sensitive. Aliases: `DOCKER_REPOSITORY`, `GITHUB_REPOSITORY`
+
+**Note**: Docker Hub [Personal Access Tokens](https://docs.docker.com/docker-hub/access-tokens/) cannot be used as they are not supported by the API. See [here](https://github.com/docker/hub-feedback/issues/1927) and [here](https://github.com/docker/hub-feedback/issues/1914) for further details. Unfortunately, this means that enabling the new 2FA feature on Docker Hub will prevent the action from working.
 
 #### Optionally specifying the file path
 
 The action assumes that there is a file called `README.md` located at the root of the repository.
 If this is not the case, the path can be overridden with an environment variable.
 
-```
+```yml
-action "Update Docker Hub Repository Description" {
+    - name: Docker Hub Description
-  uses = "peter-evans/dockerhub-description@master"
+      uses: peter-evans/dockerhub-description@v2
-  secrets = ["DOCKERHUB_USERNAME", "DOCKERHUB_PASSWORD", "DOCKERHUB_REPOSITORY"]
+      env:
-  env = {
+        DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
-    README_FILEPATH = "./some-path/README.md"
+        DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
-  }
+        DOCKERHUB_REPOSITORY: peterevans/dockerhub-description
-}
+        README_FILEPATH: ./some-path/README.md
 ```
 
 #### Examples
 
-Updates the Docker Hub repository description whenever there is a `git push` to the `master` branch.
+The following workflow updates the Docker Hub repository description whenever there are changes to `README.md` and the workflow file itself on the `master` branch. This workflow assumes its location to be `.github/workflows/dockerhub-description.yml`.
-```
-workflow "New workflow" {
-  on = "push"
-  resolves = ["Update Docker Hub Repository Description"]
-}
 
-action "Filter master branch" {
+```yml
-  uses = "actions/bin/filter@master"
+name: Update Docker Hub Description
-  args = "branch master"
+on:
-}
+  push:
-
+    branches:
-action "Update Docker Hub Repository Description" {
+      - master
-  needs = ["Filter master branch"]
+    paths:
-  uses = "peter-evans/dockerhub-description@master"
+      - README.md
-  secrets = ["DOCKERHUB_USERNAME", "DOCKERHUB_PASSWORD", "DOCKERHUB_REPOSITORY"]
+      - .github/workflows/dockerhub-description.yml
-}
+jobs:
+  dockerHubDescription:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Docker Hub Description
+      uses: peter-evans/dockerhub-description@v2
+      env:
+        DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+        DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
+        DOCKERHUB_REPOSITORY: peterevans/dockerhub-description
 ```
 
 Updates the Docker Hub repository description whenever a new release is created.
-```
-workflow "New workflow" {
-  on = "release"
-  resolves = ["Update Docker Hub Repository Description"]
-}
 
-action "Update Docker Hub Repository Description" {
+```yml
-  uses = "peter-evans/dockerhub-description@master"
+name: Update Docker Hub Description
-  secrets = ["DOCKERHUB_USERNAME", "DOCKERHUB_PASSWORD", "DOCKERHUB_REPOSITORY"]
+on: release
-}
+jobs:
+  dockerHubDescription:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Docker Hub Description
+      uses: peter-evans/dockerhub-description@v2
+      env:
+        DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+        DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
+        DOCKERHUB_REPOSITORY: peterevans/dockerhub-description
+```
+
+## Using the Docker image independently of GitHub Actions
+
+The image can be executed in other environments independently of GitHub Actions.
+Simply volume mount the location of the `README.md` file to the container and set environment variables as follows.
+
+```bash
+docker run -v $PWD:/workspace \
+  -e DOCKERHUB_USERNAME='user1' \
+  -e DOCKERHUB_PASSWORD='xxxxx' \
+  -e DOCKERHUB_REPOSITORY='user1/my-docker-image' \
+  -e README_FILEPATH='/workspace/README.md' \
+  peterevans/dockerhub-description:2.3
 ```
 
 ## License
 
-MIT License - see the [LICENSE](LICENSE) file for details
+[MIT](LICENSE)

action.yml

@@ -0,0 +1,22 @@
+name: 'Docker Hub Description'
+author: 'Peter Evans'
+description: 'An action to update a Docker Hub repository description from README.md'
+# env:
+#   DOCKERHUB_USERNAME:
+#     description: Username to login to Docker Hub. Aliases: DOCKER_USERNAME
+#     required: true
+#   DOCKERHUB_PASSWORD:
+#     description: Password to login to Docker Hub. Aliases: DOCKER_PASSWORD
+#     required: true
+#   DOCKERHUB_REPOSITORY:
+#     description: Explicit Docker Hub repository name. Aliases: DOCKER_REPOSITORY, GITHUB_REPOSITORY
+#     required: true
+#   README_FILEPATH:
+#     description: Path to the repository readme.
+#     default: ./README.md
+runs:
+  using: 'docker'
+  image: 'docker://peterevans/dockerhub-description:2.3.1'
+branding:
+  icon: 'upload'
+  color: 'blue'

entrypoint.sh

@@ -1,10 +1,42 @@
 #!/bin/sh -l
-set -euo pipefail
+set -eo pipefail
 IFS=$'\n\t'
 
+# Allow DOCKERHUB_* variables to be set from their DOCKER_* variant
+DOCKERHUB_USERNAME=${DOCKERHUB_USERNAME:-${DOCKER_USERNAME}}
+DOCKERHUB_PASSWORD=${DOCKERHUB_PASSWORD:-${DOCKER_PASSWORD}}
+DOCKERHUB_REPOSITORY=${DOCKERHUB_REPOSITORY:-${DOCKER_REPOSITORY}}
+
+# If the repository isn't explicitly defined, infer it from GitHub if possible
+DOCKERHUB_REPOSITORY=${DOCKERHUB_REPOSITORY:-${GITHUB_REPOSITORY}}
+
+# Validate we can authenticate
+if [ -z "$DOCKERHUB_USERNAME" ] || [ -z "$DOCKERHUB_PASSWORD" ]; then
+  echo 'Unable to authenticate with Docker Hub, set a valid $DOCKERHUB_USERNAME and $DOCKERHUB_PASSWORD'
+  exit 1
+fi
+
+# Validate we have the repository name
+if [ -z "$DOCKERHUB_REPOSITORY" ]; then
+  echo 'Unable to determine Docker Hub repository name, set with $DOCKERHUB_REPOSITORY'
+  exit 1
+fi
+
 # Set the default path to README.md
 README_FILEPATH=${README_FILEPATH:="./README.md"}
 
+# Check the file exists
+if [ ! -f ${README_FILEPATH} ]; then
+  echo "Readme file not found"
+  exit 1
+fi
+
+# Check the file size
+if [ $(wc -c <${README_FILEPATH}) -gt 25000 ]; then
+  echo "File size exceeds the maximum allowed 25000 bytes"
+  exit 1
+fi
+
 # Acquire a token for the Docker Hub API
 echo "Acquiring token"
 LOGIN_PAYLOAD="{\"username\": \"${DOCKERHUB_USERNAME}\", \"password\": \"${DOCKERHUB_PASSWORD}\"}"
@@ -12,12 +44,14 @@ TOKEN=$(curl -s -H "Content-Type: application/json" -X POST -d ${LOGIN_PAYLOAD}
 
 # Send a PATCH request to update the description of the repository
 echo "Sending PATCH request"
-REPO_URL="https://hub.docker.com/v2/repositories/${DOCKERHUB_USERNAME}/${DOCKERHUB_REPOSITORY}/"
+REPO_URL="https://hub.docker.com/v2/repositories/${DOCKERHUB_REPOSITORY}/"
-RESPONSE_CODE=$(curl -s --write-out %{response_code} --silent --output /dev/null -H "Authorization: JWT ${TOKEN}" -X PATCH --data-urlencode full_description@${README_FILEPATH} ${REPO_URL})
+RESPONSE_CODE=$(curl -s --write-out %{response_code} --output /dev/null -H "Authorization: JWT ${TOKEN}" -X PATCH --data-urlencode full_description@${README_FILEPATH} ${REPO_URL})
 echo "Received response code: $RESPONSE_CODE"
 
 if [ $RESPONSE_CODE -eq 200 ]; then
+  echo "Request successful"
   exit 0
 else
+  echo "Request failed"
   exit 1
 fi