feat: Add commitMessage option

Close #74
cf. #72 and #73

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.10.3
+FROM alpine:3.11.2
 
 RUN apk add --no-cache \
     bash \

README.md

@@ -71,6 +71,7 @@ Do you want to skip the docker build step? OK, the script mode is available.
   - [⭐️ Keeping existing files](#%EF%B8%8F-keeping-existing-files)
   - [⭐️ Deploy to external repository](#%EF%B8%8F-deploy-to-external-repository)
   - [⭐️ Force orphan](#%EF%B8%8F-force-orphan)
+  - [⭐️ Set Git username and email](#%EF%B8%8F-set-git-username-and-email)
   - [⭐️ Script mode](#%EF%B8%8F-script-mode)
 - [Tips and FAQ](#tips-and-faq)
   - [⭐️ Use the latest and specific release](#%EF%B8%8F-use-the-latest-and-specific-release)
@@ -311,6 +312,23 @@ This allows you to make your publish branch with only the latest commit.
     forceOrphan: true
 ```
 
+### ⭐️ Set Git username and email
+
+Set custom `git config user.name` and `git config user.email`.
+A commit is always created with the same user.
+
+```yaml
+- name: Deploy
+  uses: peaceiris/actions-gh-pages@v2
+  env:
+    ACTIONS_DEPLOY_KEY: ${{ secrets.ACTIONS_DEPLOY_KEY }}
+    PUBLISH_BRANCH: gh-pages
+    PUBLISH_DIR: ./public
+  with:
+    username: "iris"
+    useremail: "iris@peaceiris.com"
+```
+
 ### ⭐️ Script mode
 
 From `v2.5.0`, we can run this action as a shell script.

action.yml

@@ -20,3 +20,12 @@ inputs:
     description: 'Keep only the latest commit on a GitHub Pages branch'
     required: false
     default: 'false'
+  username:
+    description: 'Set Git user.name'
+    required: false
+  useremail:
+    description: 'Set Git user.email'
+    required: false
+  commitMessage:
+    description: 'Set custom commit message'
+    required: false

entrypoint.sh

@@ -92,7 +92,7 @@ elif git clone --depth=1 --single-branch --branch "${remote_branch}" "${remote_r
         git rm -r --ignore-unmatch '*'
     fi
 
-    find "${GITHUB_WORKSPACE}/${PUBLISH_DIR}" -maxdepth 1 | \
+    find "${GITHUB_WORKSPACE}/${PUBLISH_DIR}" -maxdepth 1 -not -name ".git" -not -name ".github" | \
         tail -n +2 | \
         xargs -I % cp -rf % "${local_dir}/"
 else
@@ -102,14 +102,34 @@ else
 fi
 
 # push to publishing branch
-git config user.name "${GITHUB_ACTOR}"
-git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
+if [[ -n "${INPUT_USERNAME}" ]]; then
+    git config user.name "${INPUT_USERNAME}"
+else
+    git config user.name "${GITHUB_ACTOR}"
+fi
+if [[ -n "${INPUT_USEREMAIL}" ]]; then
+    git config user.email "${INPUT_USEREMAIL}"
+else
+    git config user.email "${GITHUB_ACTOR}@users.noreply.github.com"
+fi
 git remote rm origin || true
 git remote add origin "${remote_repo}"
 git add --all
 
 print_info "Allowing empty commits: ${INPUT_EMPTYCOMMITS}"
-COMMIT_MESSAGE="Automated deployment: $(date -u) ${GITHUB_SHA}"
+
+if [ -n "${INPUT_COMMITMESSAGE}" ]; then
+    BASE_COMMIT_MESSAGE="${INPUT_COMMITMESSAGE}"
+else
+    BASE_COMMIT_MESSAGE="Automated deployment: $(date -u)"
+fi
+
+if [ -n "${EXTERNAL_REPOSITORY}" ]; then
+    COMMIT_MESSAGE="${BASE_COMMIT_MESSAGE} ${GITHUB_REPOSITORY}@${GITHUB_SHA}"
+else
+    COMMIT_MESSAGE="${BASE_COMMIT_MESSAGE} ${GITHUB_SHA}"
+fi
+
 if [[ ${INPUT_EMPTYCOMMITS} == "false" ]]; then
     git commit -m "${COMMIT_MESSAGE}" || skip
 else