Merge pull request #91 from irphilli/feature/allow-pr-no-diff

Makefile

@@ -2,7 +2,7 @@
 phony: help
 
 # Release tag for the action
-VERSION := v0.4.2
+VERSION := v0.5.0
 
 # GitHub Actions bogus variables
 GITHUB_REF ?= refs/heads/null

README.md

@@ -12,7 +12,7 @@ Features:
 * Can assign `assignee`, `reviewer`, one or more `label`, a `milestone` or mark it as a `draft`
 * Can replace any `old_string` inside a pull request template with a `new_string`. Or put commits' subjects in place of `old_string`.
 * When `get_diff` is `true` will add list of commits in place of `<!-- Diff commits -->` and list of modified files in place of `<!-- Diff files -->` in a pull request template.
-
+* When `allow_no_diff` is set to true will continue execution and create pull request even if both branches have no differences, e.g. having only a merge commit.
 
 ## Badge swag
 [![Master branch](https://github.com/devops-infra/action-pull-request/workflows/Master%20branch/badge.svg)](https://github.com/devops-infra/action-pull-request/actions?query=workflow%3A%22Master+branch%22)
@@ -37,7 +37,7 @@ Features:
 
 ```yaml
     - name: Run the Action
-      uses: devops-infra/action-pull-request@v0.4.2
+      uses: devops-infra/action-pull-request@v0.5.0
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         source_branch: development
@@ -54,12 +54,14 @@ Features:
         new_string: "** Automatic pull request**"
         get_diff: true
         ignore_users: "dependabot"
+        allow_no_diff: false
 ```
 
 
 | Input Variable | Required | Default                       | Description                                                                                                              |
 | -------------- | -------- | ----------------------------- | ------------------------------------------------------------------------------------------------------------------------ |
 | github_token   | Yes      | `""`                          | GitHub token `${{ secrets.GITHUB_TOKEN }}`                                                                               |
+| allow_no_diff  | No       | `false`                       | Allows to continue on merge commits with no diffs.                                                                       |
 | assignee       | No       | `""`                          | Assignee's usernames.                                                                                                    |
 | body           | No       | *list of commits*             | Pull request body.                                                                                                       |
 | draft          | No       | `false`                       | Whether to mark it as a draft.                                                                                           |
@@ -116,7 +118,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
       - name: Create pull request
-        uses: devops-infra/action-pull-request@v0.4.2
+        uses: devops-infra/action-pull-request@v0.5.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           title: Automatic pull request
@@ -138,7 +140,7 @@ jobs:
           fetch-depth: 0
       - name: Run the Action
         if: startsWith(github.ref, 'refs/heads/feature')
-        uses: devops-infra/action-pull-request@v0.4.2
+        uses: devops-infra/action-pull-request@v0.5.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           title: ${{ github.event.commits[0].message }}

action.yml

@@ -60,12 +60,16 @@ inputs:
     description: List of users to ignore, coma separated
     required: false
     default: "dependabot"
+  allow_no_diff:
+    description: Allows to continue on merge commits with no diffs
+    required: false
+    default: "false"
 outputs:
   url:
     description: Pull request URL.
 runs:
   using: docker
-  image: docker://devopsinfra/action-pull-request:v0.4.2
+  image: docker://devopsinfra/action-pull-request:v0.5.0
   env:
     GITHUB_TOKEN: ${{ inputs.github_token }}
 branding:

entrypoint.sh

@@ -20,6 +20,7 @@ echo "  get_diff: ${INPUT_GET_DIFF}"
 echo "  old_string: ${INPUT_OLD_STRING}"
 echo "  new_string: ${INPUT_NEW_STRING}"
 echo "  ignore_users: ${INPUT_IGNORE_USERS}"
+echo "  allow_no_diff: ${INPUT_ALLOW_NO_DIFF}"
 
 # Skip whole script to not cause errors
 IFS=',' read -r -a IGNORE_USERS <<< "${INPUT_IGNORE_USERS}"
@@ -67,8 +68,12 @@ fi
 
 echo -e "\nComparing branches by diff..."
 if [[ -z $(git diff "remotes/origin/${TARGET_BRANCH}...remotes/origin/${SOURCE_BRANCH}") ]]; then
-  echo -e "\n[INFO] Both branches are the same. No action needed."
-  exit 0
+  if [[ "${INPUT_ALLOW_NO_DIFF}" == "true" ]]; then
+    echo -e "\n[INFO] Both branches are the same. Continuing."
+  else
+    echo -e "\n[INFO] Both branches are the same. No action needed."
+    exit 0
+  fi
 fi
 
 # sed has problems with putting multi-line strings in the next steps, and later we use # for sed