Update diff with js

Author: edvilme

.github/workflows/remove-lockdown-label.yml

@@ -15,18 +15,36 @@ jobs:
         steps:
         -   name: Checkout repository
             uses: actions/checkout@v2
-        -   name: PR's only change is <VersionFeature> in eng/Versions.props
-            run: |
-                git fetch --depth=2
-                changes=$(git diff HEAD^ HEAD -- eng/Versions.props | grep '^[-+]')
-                changes_without_version_feature=$(echo "$changes" | grep -v '<VersionFeature>')
-                has_changes_without_version_feature=$(echo "$changes_without_version_feature" | wc -l)
-                if [ "$has_changes_without_version_feature" -eq 0 ]; then
-                    echo "only_version_feature_changed=true" >> $GITHUB_ENV
-                    echo "✅ Only change in eng/Versions.props is <VersionFeature>"
-                else
-                    echo "only_version_feature_changed=false" >> $GITHUB_ENV
-                    echo "❌ Changes in eng/Versions.props other than <VersionFeature> found"
+
+        # flagged user-visible change: replaced shell script with JS to check <VersionFeature>user-visible change: replaced shell script with JS to check <VersionFeature>
+        -   name: PR's only change is <VersionFeature> in eng/Versions.propsly change is <VersionFeature> in eng/Versions.props
+            uses: actions/github-script@v4
+            with:
+                script: |
+                    const prNumber = context.payload.pull_request.number;
+                    const { data: files } = await github.pulls.listFiles({
+                        owner: context.repo.owner,
+                        repo: context.repo.repo,    repo: context.repo.repo,
+                        pull_number: prNumber
+                    });
+                    // If files other than eng/Versions.props are changed, output message and exit
+                    if (files.any(file => file.filename !== "eng/Versions.props")) {
+                        console.log("❌ Changes in eng/Versions.props other than <VersionFeature> found");
+                        core.exportVariable("only_version_feature_changed", "false");
+                        return;
+                    }
+                    // Iterate through the patch of eng/Versions.props to check for changes other than <VersionFeature>
+                    const versionsPropsFile = files.find(file => file.filename === "eng/Versions.props");
+                    const patchLines = versionsPropsFile.patch.split("\n").filter(l => l.startsWith("+") || l.startsWith("-"));
+                    for (const line of patchLines) {
+                        if (!line.includes("<VersionFeature>")) {
+                            console.log("❌ Changes in eng/Versions.props other than <VersionFeature> found");
+                            core.exportVariable("only_version_feature_changed", "false");
+                            return;
+                        }
+                    }
+                    console.log("✅ PR's only change is <VersionFeature> in eng/Versions.props");
+                    core.exportVariable("only_version_feature_changed", "true");
 
         -   name: Remove Branch Lockdown label from other PRs targeting this branch
             if: steps.PR_has_Branding_label.outputs.has_branding_label == 'true' && steps.PR_only_change_is_VersionFeature_in_eng_Versions_props.outputs.only_version_feature_changed == 'true'