Support retrieving changed files between the last remote commit and the current HEAD for push events (#236)

* Update entrypoint.sh

* Update entrypoint.sh

* Update entrypoint.sh

* Update entrypoint.sh

* Update entrypoint.sh

* Update entrypoint.sh

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Update entrypoint.sh

* Update entrypoint.sh

* Update entrypoint.sh

* Update entrypoint.sh

* Create new.yml

* Empty commit

* Empty commit 2

* Empty commit 3

* Updated the use the last remote commit

* Update entrypoint.sh

* Update README.md

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

.github/workflows/test.yml

@@ -314,7 +314,7 @@ jobs:
       - name: Verify any_changed from source files
         if: |
           (
-            !contains(steps.changed-files-specific-source-file.outputs.all_modified_files, 'action.yml') && 
+            !contains(steps.changed-files-specific-source-file.outputs.all_modified_files, 'action.yml') &&
             !contains(steps.changed-files-specific-source-file.outputs.all_modified_files, '.github/workflows/test.yml') &&
             !contains(steps.changed-files-specific-source-file.outputs.all_modified_files, '.github/workflows/rebase.yml')
           )
@@ -388,6 +388,16 @@ jobs:
           branch: ${{ steps.branch-name.outputs.base_ref_branch }}
           workflow_id: 'test.yml'
           github_token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Run changed-files with since_last_remote_commit set to true
+        id: changed-files-since-last-remote-commit
+        uses: ./
+        with:
+          since_last_remote_commit: 'true'
+      - name: Show output
+        run: |
+          echo '${{ toJSON(steps.changed-files-since-last-remote-commit.outputs) }}'
+        shell:
+          bash
       - name: Run changed-files with a custom base sha
         id: changed-files-custom-base-sha
         uses: ./

README.md

@@ -111,6 +111,7 @@ jobs:
 | sha           |  `string`      |    `true`     | `${{ github.sha }}`           | Specify a different <br> commit SHA <br> used for <br> comparing changes  |
 | files\_from\_source\_file |  `string`      |    `false`     |                    | Source file <br> used to populate <br> the files input |
 | path | `string` | `false` |  | Relative path under <br> `GITHUB_WORKSPACE` <br> to the repository |
+| since_last_remote_commit | `string` | `false` | `false` | Use the last commit on the remote <br> branch as the `base_sha` for push event.<br> (Defaults to the previous commit). |
 
 ## Example
 

action.yml

@@ -26,6 +26,10 @@ inputs:
   base_sha:
     description: 'Specify a base commit SHA on used for comparing changes'
     required: false
+  since_last_remote_commit:
+    description: 'Use the last commit on the remote branch as the base_sha for push event.'
+    required: false
+    default: 'false'
   path:
     description: 'Specify a relative path under $GITHUB_WORKSPACE to locate the repository'
     required: false
@@ -90,6 +94,14 @@ runs:
       env:
         INPUT_FILES: ${{ inputs.files }}
         INPUT_FILES_FROM_SOURCE_FILE: ${{ inputs.files_from_source_file }}
+    - run: |
+        if [[ -n "${{ inputs.base_sha }}" ]]; then
+          echo "::set-output name=base_sha::${{ inputs.base_sha }}"
+        elif [[ "${{ github.event_name }}" == "push" && -z "${{ inputs.base_sha }}" && "${{ inputs.since_last_remote_commit }}" == "true" ]]; then
+          echo "::set-output name=base_sha::${{ github.event.before }}"
+        fi
+      id: base-sha
+      shell: bash
     - run: |
         bash $GITHUB_ACTION_PATH/entrypoint.sh
       id: changed-files
@@ -101,7 +113,7 @@ runs:
         # INPUT_<VARIABLE_NAME> is not available in Composite run steps
         # https://github.community/t/input-variable-name-is-not-available-in-composite-run-steps/127611
         INPUT_SHA: ${{ inputs.sha }}
-        INPUT_BASE_SHA: ${{ inputs.base_sha }}
+        INPUT_BASE_SHA: ${{ steps.base-sha.outputs.base_sha }}
         INPUT_TOKEN: ${{ inputs.token }}
         INPUT_FILES: ${{ steps.source-input-files.outputs.files }}
         INPUT_SEPARATOR: ${{ inputs.separator }}

entrypoint.sh

@@ -44,13 +44,14 @@ if [[ $exit_status -ne 0 ]]; then
 fi
 
 if [[ -z $GITHUB_BASE_REF ]]; then
+  TARGET_BRANCH=${GITHUB_REF/refs\/heads\//}
+  CURRENT_BRANCH=$TARGET_BRANCH
+
   if [[ -z $INPUT_BASE_SHA ]]; then
     PREVIOUS_SHA=$(git rev-parse HEAD^1 2>&1) && exit_status=$? || exit_status=$?
   else
-    PREVIOUS_SHA=$INPUT_BASE_SHA
+    PREVIOUS_SHA=$INPUT_BASE_SHA && exit_status=$? || exit_status=$?
   fi
-  TARGET_BRANCH=${GITHUB_REF/refs\/heads\//}
-  CURRENT_BRANCH=$TARGET_BRANCH
 
   if [[ $exit_status -ne 0 ]]; then
     echo "::warning::Unable to determine the previous commit sha"