fix: only create flake.lock PR if there are actually changes

Author: mrjones2014

.github/workflows/update-flake-dependencies.yml

@@ -22,13 +22,16 @@ jobs:
         COMMIT_BRANCH: automation/update-flake-dependencies
         COMMIT_MESSAGE: "chore(nix): Update Flake dependencies"
       run: |
-          # create the branch on the remote
-          git branch "$COMMIT_BRANCH"
-          git push -u origin "$COMMIT_BRANCH"
-          # commit via the GitHub API so we get automatic commit signing
-          gh api --method PUT /repos/1Password/shell-plugins/contents/$FILE_TO_COMMIT \
-            --field message="$COMMIT_MESSAGE" \
-            --field content=@<(base64 -i $FILE_TO_COMMIT) \
-            --field branch="$COMMIT_BRANCH" \
-            --field sha="$(git rev-parse $COMMIT_BRANCH:$FILE_TO_COMMIT)"
-          gh pr create --title "[automation]: Update Flake dependencies" --body "This is an automated PR to update \`flake.lock\`" --reviewer mrjones2014 --base main --head $COMMIT_BRANCH
+          # make sure something actually changed first, if not, no updates required
+          if [[ `git status --porcelain` ]]; then
+            # create the branch on the remote
+            git branch "$COMMIT_BRANCH"
+            git push -u origin "$COMMIT_BRANCH"
+            # commit via the GitHub API so we get automatic commit signing
+            gh api --method PUT /repos/1Password/shell-plugins/contents/$FILE_TO_COMMIT \
+              --field message="$COMMIT_MESSAGE" \
+              --field content=@<(base64 -i $FILE_TO_COMMIT) \
+              --field branch="$COMMIT_BRANCH" \
+              --field sha="$(git rev-parse $COMMIT_BRANCH:$FILE_TO_COMMIT)"
+            gh pr create --title "[automation]: Update Flake dependencies" --body "This is an automated PR to update \`flake.lock\`" --reviewer mrjones2014 --base main --head $COMMIT_BRANCH
+          fi