Ping people for pull requests targeting guarded branches

src/main/java/io/quarkus/bot/TriagePullRequest.java

@@ -19,6 +19,7 @@
 import io.quarkus.bot.config.Feature;
 import io.quarkus.bot.config.QuarkusGitHubBotConfig;
 import io.quarkus.bot.config.QuarkusGitHubBotConfigFile;
+import io.quarkus.bot.config.QuarkusGitHubBotConfigFile.GuardedBranch;
 import io.quarkus.bot.config.QuarkusGitHubBotConfigFile.TriageRule;
 import io.quarkus.bot.util.GHIssues;
 import io.quarkus.bot.util.Mentions;
@@ -48,10 +49,6 @@ void triagePullRequest(
             return;
         }
 
-        if (quarkusBotConfigFile.triage.rules.isEmpty()) {
-            return;
-        }
-
         GHPullRequest pullRequest = pullRequestPayload.getPullRequest();
         Set<String> labels = new TreeSet<>();
         Mentions mentions = new Mentions();
@@ -78,20 +75,32 @@ void triagePullRequest(
             }
         }
 
-        // remove from the set the labels already present on the pull request
-        pullRequest.getLabels().stream().map(GHLabel::getName).forEach(labels::remove);
+        for (GuardedBranch guardedBranch : quarkusBotConfigFile.triage.guardedBranches) {
+            if (guardedBranch.ref.equals(pullRequest.getBase().getRef())) {
+                for (String mention : guardedBranch.notify) {
+                    mentions.add(mention, guardedBranch.ref);
+                }
+            }
+        }
 
+        // remove from the set the labels already present on the pull request
         if (!labels.isEmpty()) {
-            if (!quarkusBotConfig.isDryRun()) {
-                pullRequest.addLabels(limit(labels).toArray(new String[0]));
-            } else {
-                LOG.info("Pull Request #" + pullRequest.getNumber() + " - Add labels: " + String.join(", ", limit(labels)));
+            pullRequest.getLabels().stream().map(GHLabel::getName).forEach(labels::remove);
+
+            if (!labels.isEmpty()) {
+                if (!quarkusBotConfig.isDryRun()) {
+                    pullRequest.addLabels(limit(labels).toArray(new String[0]));
+                } else {
+                    LOG.info("Pull Request #" + pullRequest.getNumber() + " - Add labels: " + String.join(", ", limit(labels)));
+                }
             }
         }
 
-        mentions.removeAlreadyParticipating(GHIssues.getParticipatingUsers(pullRequest, gitHubGraphQLClient));
         if (!mentions.isEmpty()) {
-            comments.add("/cc " + mentions.getMentionsString());
+            mentions.removeAlreadyParticipating(GHIssues.getParticipatingUsers(pullRequest, gitHubGraphQLClient));
+            if (!mentions.isEmpty()) {
+                comments.add("/cc " + mentions.getMentionsString());
+            }
         }
 
         for (String comment : comments) {

src/main/java/io/quarkus/bot/config/QuarkusGitHubBotConfigFile.java

@@ -29,6 +29,8 @@ public static class TriageConfig {
 
         public List<TriageRule> rules = new ArrayList<>();
 
+        public List<GuardedBranch> guardedBranches = new ArrayList<>();
+
         public QE qe = new QE();
 
         public Discussions discussions = new Discussions();
@@ -149,6 +151,14 @@ public static class Develocity {
         public String url;
     }
 
+    public static class GuardedBranch {
+
+        public String ref;
+
+        @JsonDeserialize(as = TreeSet.class)
+        public Set<String> notify = new TreeSet<>();
+    }
+
     boolean isFeatureEnabled(Feature feature) {
         return features.contains(Feature.ALL) || features.contains(feature);
     }

src/test/java/io/quarkus/bot/it/PullRequestOpenedTest.java

@@ -393,6 +393,23 @@ void triageIdNotify() throws IOException {
                 });
     }
 
+    @Test
+    void triageGuardedBranches() throws IOException {
+        given().github(mocks -> mocks.configFile("quarkus-github-bot.yml")
+                .fromString("features: [ TRIAGE_ISSUES_AND_PULL_REQUESTS ]\n"
+                        + "triage:\n"
+                        + "  guardedBranches:\n"
+                        + "    - ref: 3.15\n"
+                        + "      notify: [jmartisk,gsmet]\n"))
+                .when().payloadFromClasspath("/pullrequest-opened-guarded-branch.json")
+                .event(GHEvent.PULL_REQUEST)
+                .then().github(mocks -> {
+                    verify(mocks.pullRequest(527350930))
+                            .comment("/cc @gsmet (3.15), @jmartisk (3.15)");
+                    verifyNoMoreInteractions(mocks.ghObjects());
+                });
+    }
+
     @Test
     void descriptionMissingForSmallDocChange() throws IOException {
         given()