fix(ncu-ci): only filter main branch when it's the only one

Hide the target annotation only when main is the sole recorded target.
Keep it visible alongside other targets after a PR is retargeted.

Signed-off-by: Filip Skokan <panva.ip@gmail.com>
Assisted-by: Codex

Author: panva

lib/ci/failure_aggregator.js

@@ -28,12 +28,14 @@ function formatTargetBranches(pr, markdown = false) {
   if (!parsePRFromURL(pr.source)) {
     return '';
   }
-  const branches = pr.targetBranches
-    .filter(branch => branch !== 'main')
-    .map(branch => markdown
-      ? branch.replace(/[&<>"'\\`*_[\]{}()!|~]/g, char => `&#${char.charCodeAt(0)};`)
-      : branch);
-  return branches.length ? ` (target: ${branches.join(', ')})` : '';
+  if (pr.targetBranches.length === 1 && pr.targetBranches[0] === 'main') {
+    return '';
+  }
+  const branches = markdown
+    ? pr.targetBranches.map(branch =>
+      branch.replace(/[&<>"'\\`*_[\]{}()!|~]/g, char => `&#${char.charCodeAt(0)};`))
+    : pr.targetBranches;
+  return ` (target: ${branches.join(', ')})`;
 }
 
 export class FailureAggregator {

test/unit/ci_failure_aggregator.test.js

@@ -46,7 +46,7 @@ describe('Failure aggregation target branches', () => {
     const markdown = aggregator.formatAsMarkdown();
     assert.ok(markdown.includes('| Failed PR | 2 (' +
       `[nodejs/node#2](${failures[3].upstream}) (target: v22.x), ` +
-      `[nodejs/node#1](${failures[0].upstream}) (target: v24.x)) |`));
+      `[nodejs/node#1](${failures[0].upstream}) (target: main, v24.x)) |`));
     assert.ok(markdown.includes(`| First CI | ${failures[3].upstream} |`));
     assert.ok(markdown.includes(`| Last CI | ${failures[0].upstream} |`));
     assert.ok(markdown.includes('Health summary\n'));
@@ -55,7 +55,7 @@ describe('Failure aggregation target branches', () => {
 
     aggregator.display();
     assert.deepEqual(cli._calls.table.filter(([key]) => key === 'Failed PR'), [
-      ['Failed PR', '2 (nodejs/node#2 (target: v22.x), nodejs/node#1 (target: v24.x))'],
+      ['Failed PR', '2 (nodejs/node#2 (target: v22.x), nodejs/node#1 (target: main, v24.x))'],
       ['Failed PR', '1 (nodejs/node#3)']
     ]);
   });
@@ -66,16 +66,18 @@ describe('Failure aggregation target branches', () => {
       failure(1, 104), failure(1, 103, 'main'), failure(1, 102), failure(2, 101)
     ]);
     const markdown = aggregator.formatAsMarkdown();
-    assert.equal(markdown.includes('target: unknown, main'), false);
+    assert.ok(markdown.includes('(target: unknown, main)'));
     assert.ok(markdown.includes('(target: unknown)'));
     aggregator.display();
     assert.deepEqual(cli._calls.table.find(([key]) => key === 'Failed PR'),
-      ['Failed PR', '2 (nodejs/node#2 (target: unknown), nodejs/node#1 (target: unknown))']);
+      ['Failed PR', '2 (nodejs/node#2 (target: unknown), nodejs/node#1 (target: unknown, main))']);
   });
 
-  it('hides main targets and abbreviates PR labels without changing CI links', () => {
+  it('hides sole main targets and abbreviates PR labels without changing CI links', () => {
     const cli = new TestCLI();
-    const failures = [failure(1, 102, 'main'), failure(2, 101, 'main')];
+    const failures = [
+      failure(1, 102, 'main'), failure(2, 101, 'main'), failure(1, 100, 'main')
+    ];
     failures[1].source = 'https://github.com/nodejs-private/node-private/pull/2/';
     const aggregator = new FailureAggregator(cli, [health, ...failures]);
     const markdown = aggregator.formatAsMarkdown();