Implement PR feedback

src/actions-util.test.ts

@@ -90,12 +90,10 @@ test("prepareEnvironment() when a local run", (t) => {
   t.deepEqual(process.env.CODEQL_ACTION_ANALYSIS_KEY, "LOCAL-RUN:UNKNOWN-JOB");
 });
 
-test("validateWorkflow() when on.push is missing", (t) => {
+test("validateWorkflow() when on is empty", (t) => {
   const errors = actionsutil.validateWorkflow({ on: {} });
 
-  t.deepEqual(
-    ...errorCodes(errors, [actionsutil.WorkflowErrors.MissingPushHook])
-  );
+  t.deepEqual(...errorCodes(errors, []));
 });
 
 test("validateWorkflow() when on.push is an array missing pull_request", (t) => {
@@ -549,6 +547,45 @@ name: "CodeQL"
   t.deepEqual(...errorCodes(errors, []));
 });
 
+test("validateWorkflow() with a different on setup", (t) => {
+  t.deepEqual(
+    ...errorCodes(
+      actionsutil.validateWorkflow(
+        yaml.safeLoad(`
+name: "CodeQL"
+on: "workflow_dispatch"
+`)
+      ),
+      []
+    )
+  );
+
+  t.deepEqual(
+    ...errorCodes(
+      actionsutil.validateWorkflow(
+        yaml.safeLoad(`
+name: "CodeQL"
+on: [workflow_dispatch]
+`)
+      ),
+      []
+    )
+  );
+
+  t.deepEqual(
+    ...errorCodes(
+      actionsutil.validateWorkflow(
+        yaml.safeLoad(`
+name: "CodeQL"
+on:
+  workflow_dispatch: {}
+`)
+      ),
+      []
+    )
+  );
+});
+
 test("validateWorkflow() should not report an error if PRs are totally unconfigured", (t) => {
   t.deepEqual(
     ...errorCodes(

src/actions-util.ts

@@ -236,18 +236,10 @@ export function validateWorkflow(doc: Workflow): CodedError[] {
   let missing = MissingTriggers.None;
 
   if (doc.on === undefined) {
-    // codeql will scan the default branch
+    // this is not a valid config
   } else if (typeof doc.on === "string") {
-    switch (doc.on) {
-      case "push":
-        // valid configuration
-        break;
-      case "pull_request":
-        missing = MissingTriggers.Push;
-        break;
-      default:
-        missing = MissingTriggers.Push | MissingTriggers.PullRequest;
-        break;
+    if (doc.on === "pull_request") {
+      missing = MissingTriggers.Push;
     }
   } else if (Array.isArray(doc.on)) {
     const hasPush = doc.on.includes("push");
@@ -262,7 +254,7 @@ export function validateWorkflow(doc: Workflow): CodedError[] {
       "pull_request"
     );
 
-    if (!hasPush) {
+    if (!hasPush && hasPullRequest) {
       missing = missing | MissingTriggers.Push;
     }
     if (hasPush && hasPullRequest) {
@@ -279,8 +271,9 @@ export function validateWorkflow(doc: Workflow): CodedError[] {
       }
     }
 
-    // check the user is scanning PRs right now
-    // if not the warning does not apply
+    // if doc.on.pull_request is null that means 'all branches'
+    // if doc.on.pull_request is undefined that means 'off'
+    // we only want to check for mismatched branches if pull_request is on.
     if (doc.on.pull_request !== undefined) {
       const push = branchesToArray(doc.on.push?.branches);