feat: add repository_path input for custom checkout paths in action

Relates to #96

Author: ChristophShyper

README.md

@@ -84,6 +84,7 @@ This action supports three tag levels for flexible versioning:
 | `no_edit`                 | No       | `false`          | Whether to not edit commit message when using amend (`--no-edit`).                                                                                            |
 | `organization_domain`     | No       | `github.com`     | GitHub Enterprise domain name.                                                                                                                                |
 | `target_branch`           | No       | *current branch* | Name of a new branch to push the code into. Creates branch if not existing unless there are no changes and `amend` is false.                                  |
+| `repository_path`         | No       | `.`              | Relative path under `${{ github.workspace }}` where the repository is checked out. Set this when `actions/checkout` uses `path:`.                             |
 
 
 ### 📤 Output Parameters
@@ -186,6 +187,34 @@ jobs:
           force_with_lease: true  # Safer force push option
 ```
 
+### 📁 Custom checkout path example
+Commit and push when `actions/checkout` uses a custom path.
+
+```yaml
+name: Commit from custom checkout path
+on:
+  push
+jobs:
+  change-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository into custom path
+        uses: actions/checkout@v6
+        with:
+          path: work/repo
+
+      - name: Change something in checked out repository
+        run: |
+          echo "Updated" >> work/repo/README.md
+
+      - name: Commit and push changes
+        uses: devops-infra/action-commit-push@v1.2.2
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          repository_path: work/repo
+          commit_message: "Update README"
+```
+
 ## 📝 Amend Options
 When using `amend: true`, you have several options for handling the commit message:
 

action.yml

@@ -58,6 +58,10 @@ inputs:
     description: Name of a new branch to push the code into (skipped when no changes and amend is false)
     required: false
     default: ""
+  repository_path:
+    description: Relative path under GITHUB_WORKSPACE to the checked-out repository (use when actions/checkout path is set)
+    required: false
+    default: "."
 outputs:
   files_changed:
     description: List of changed files

entrypoint.sh

@@ -19,6 +19,7 @@ echo "  fail_on_rebase_conflict: ${INPUT_FAIL_ON_REBASE_CONFLICT}"
 echo "  no_edit:                 ${INPUT_NO_EDIT}"
 echo "  organization_domain:     ${INPUT_ORGANIZATION_DOMAIN}"
 echo "  target_branch:           ${INPUT_TARGET_BRANCH}"
+echo "  repository_path:         ${INPUT_REPOSITORY_PATH}"
 
 # Require github_token
 if [[ -z "${GITHUB_TOKEN}" ]]; then
@@ -28,12 +29,45 @@ if [[ -z "${GITHUB_TOKEN}" ]]; then
   exit 1
 fi
 
+REPOSITORY_PATH="${INPUT_REPOSITORY_PATH:-.}"
+if [[ -z "${REPOSITORY_PATH}" ]]; then
+  REPOSITORY_PATH="."
+fi
+if [[ "${REPOSITORY_PATH}" == /* ]]; then
+  echo "[ERROR] Input 'repository_path' must be a relative path under GITHUB_WORKSPACE."
+  exit 1
+fi
+
+WORKSPACE_DIR="$(realpath -m "${GITHUB_WORKSPACE}")"
+REPO_DIR="$(realpath -m "${GITHUB_WORKSPACE}/${REPOSITORY_PATH}")"
+if [[ "${REPO_DIR}" != "${WORKSPACE_DIR}" && "${REPO_DIR}" != "${WORKSPACE_DIR}"/* ]]; then
+  echo "[ERROR] Input 'repository_path' resolves outside GITHUB_WORKSPACE."
+  exit 1
+fi
+if [[ ! -d "${REPO_DIR}" ]]; then
+  echo "[ERROR] Repository path does not exist: ${REPO_DIR}"
+  exit 1
+fi
+if ! git -C "${REPO_DIR}" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
+  echo "[ERROR] Path is not a git repository: ${REPO_DIR}"
+  exit 1
+fi
+echo "[INFO] Using repository path: ${REPO_DIR}"
+
+# Keep all global git config isolated to a temp file
+export GIT_CONFIG_GLOBAL
+GIT_CONFIG_GLOBAL="$(mktemp /tmp/action-commit-push-git-config-XXXXXX)"
+trap 'rm -f "${GIT_CONFIG_GLOBAL}"' EXIT
+
 # Set git credentials
 git config --global safe.directory "${GITHUB_WORKSPACE}"
 git config --global safe.directory /github/workspace
-git remote set-url origin "https://${GITHUB_ACTOR}:${GITHUB_TOKEN}@${INPUT_ORGANIZATION_DOMAIN}/${GITHUB_REPOSITORY}"
-git config --global user.name "${GITHUB_ACTOR}"
-git config --global user.email "${GITHUB_ACTOR}@users.noreply.${INPUT_ORGANIZATION_DOMAIN}"
+git config --global safe.directory "${REPO_DIR}"
+git -C "${REPO_DIR}" remote set-url origin "https://${GITHUB_ACTOR}:${GITHUB_TOKEN}@${INPUT_ORGANIZATION_DOMAIN}/${GITHUB_REPOSITORY}"
+git -C "${REPO_DIR}" config user.name "${GITHUB_ACTOR}"
+git -C "${REPO_DIR}" config user.email "${GITHUB_ACTOR}@users.noreply.${INPUT_ORGANIZATION_DOMAIN}"
+
+cd "${REPO_DIR}"
 
 get_current_branch() {
   local branch