From 2a51a5ea699a8f7800d9cbe6c3c691bc97dc8bb8 Mon Sep 17 00:00:00 2001
From: Kurt von Laven <kurt.von.laven@gmail.com>
Date: Thu, 19 May 2022 11:33:54 -0700
Subject: [PATCH 1/3] fix: Print error message to stderr

---
 entrypoint.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/entrypoint.sh b/entrypoint.sh
index 5ddd3c1..14762b2 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -3,7 +3,7 @@
 set -e
 
 if [[ -z $INPUT_GITHUB_TOKEN ]]; then
-  echo 'Missing input "github_token: ${{ secrets.GITHUB_TOKEN }}".'
+  echo 'Missing input "github_token: ${{ secrets.GITHUB_TOKEN }}".' >&2
   exit 1
 fi
 

From e8f5b017012086364f961d1ac65954ae91a9eb04 Mon Sep 17 00:00:00 2001
From: Kurt von Laven <kurt.von.laven@gmail.com>
Date: Wed, 11 May 2022 14:30:15 -0400
Subject: [PATCH 2/3] fix: Don't pull or push with nothing to push

Check whether there are any commits to push by comparing the project
version before and after bumping.
---
 entrypoint.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/entrypoint.sh b/entrypoint.sh
index 14762b2..9d8ed2f 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -26,6 +26,8 @@ echo "${PIP_CMD[@]}"
 "${PIP_CMD[@]}"
 echo "Commitizen version: $(cz version)"
 
+PREV_REV="$(cz version --project)"
+
 CZ_CMD=('cz')
 if [[ $INPUT_NO_RAISE ]]; then
   CZ_CMD+=('--no-raise' "$INPUT_NO_RAISE")
@@ -56,6 +58,9 @@ else
 fi
 
 REV="$(cz version --project)"
+if [[ $REV == "$PREV_REV" ]]; then
+  INPUT_PUSH='false'
+fi
 echo "REVISION=${REV}" >>"$GITHUB_ENV"
 echo "::set-output name=version::${REV}"
 

From cb1c7296fad6bbf53a1ed266f21f887a112d9903 Mon Sep 17 00:00:00 2001
From: Kurt von Laven <kurt.von.laven@gmail.com>
Date: Thu, 19 May 2022 11:32:22 -0700
Subject: [PATCH 3/3] fix: Refuse to push on pull_request event

Avoid merging pull requests, which is unlikely to be the intended
purpose of using this action.
---
 README.md     |  2 ++
 action.yml    |  6 ++++++
 entrypoint.sh | 13 +++++++++----
 3 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 5b940b9..5ca8668 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,8 @@ jobs:
 | `git_name`                     | Name used to configure git (for git operations)                                                                                                                                                                                   | `github-actions[bot]`                                           |
 | `git_email`                    | Email address used to configure git (for git operations)                                                                                                                                                                          | `github-actions[bot]@users.noreply.github.com`                  |
 | `push`                         | Define if the changes should be pushed to the branch.                                                                                                                                                                             | true                                                            |
+| `merge`                        | Define if the changes should be pushed even on the pull_request event, immediately merging the pull request.                                                                                                                      | false                                                           |
+
 | `commit`                       | Define if the changes should be committed to the branch.                                                                                                                                                                          | true                                                            |
 | `commitizen_version`           | Specify the version to be used by commitizen. Eg: `2.21.0`                                                                                                                                                                        | latest                                                          |
 | `changelog`                    | Create changelog when bumping the version                                                                                                                                                                                         | true                                                            |
diff --git a/action.yml b/action.yml
index 9f76626..2821930 100644
--- a/action.yml
+++ b/action.yml
@@ -21,6 +21,12 @@ inputs:
     description: 'If true the bump commit is pushed to the remote repository'
     required: false
     default: "true"
+  merge:
+    description: >
+      If true, the bump commit is pushed to the remote repository even when the
+      action is run on the pull_request event, immediately merging the pull request
+    required: false
+    default: "false"
   prerelease:
     description: 'Set as prerelease version'
     required: false
diff --git a/entrypoint.sh b/entrypoint.sh
index 9d8ed2f..6cc1c39 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -72,10 +72,15 @@ echo "Repository: ${INPUT_REPOSITORY}"
 echo "Actor: ${GITHUB_ACTOR}"
 
 if [[ $INPUT_PUSH == 'true' ]]; then
-  echo "Pushing to branch..."
-  REMOTE_REPO="https://${GITHUB_ACTOR}:${INPUT_GITHUB_TOKEN}@github.com/${INPUT_REPOSITORY}.git"
-  git pull "$REMOTE_REPO" "$INPUT_BRANCH"
-  git push "$REMOTE_REPO" "HEAD:${INPUT_BRANCH}" --tags
+  if [[ $INPUT_MERGE != 'true' && $GITHUB_EVENT_NAME == 'pull_request' ]]; then
+    echo "Refusing to push on pull_request event since that would merge the pull request." >&2
+    echo "You probably want to run on push to your default branch instead." >&2
+  else
+    echo "Pushing to branch..."
+    REMOTE_REPO="https://${GITHUB_ACTOR}:${INPUT_GITHUB_TOKEN}@github.com/${INPUT_REPOSITORY}.git"
+    git pull "$REMOTE_REPO" "$INPUT_BRANCH"
+    git push "$REMOTE_REPO" "HEAD:${INPUT_BRANCH}" --tags
+  fi
 else
   echo "Not pushing"
 fi