Fix build-info crash when HEAD has a non-ember-source tag

When a commit is tagged for another package (e.g. `v2.1.1-@glimmer/component`),
`parseTagVersion` would crash because `semver.parse()` returns null for tags
that aren't valid semver after stripping the `-ember-source` suffix.

This fixes `parseTagVersion` to return null for unrecognized tags, and updates
`buildFromParts` to fall through to the channel build path when the tag isn't
a recognized ember-source version tag.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: NullVoxPopuli

broccoli/build-info.js

@@ -75,8 +75,8 @@ function buildGitInfo(root) {
 function buildFromParts(packageVersion, gitInfo) {
   let { tag, branch, sha } = gitInfo;
   let shortSha = sha.slice(0, 8);
-  if (tag) {
-    let tagVersion = parseTagVersion(tag);
+  let tagVersion = tag ? parseTagVersion(tag) : null;
+  if (tag && tagVersion) {
     return {
       tag,
       branch: null,
@@ -126,7 +126,8 @@ function readPackageVersion(root) {
  */
 function parseTagVersion(tag) {
   if (tag) {
-    return semver.parse(tag.replace(/-ember-source$/, '')).version;
+    let parsed = semver.parse(tag.replace(/-ember-source$/, ''));
+    return parsed ? parsed.version : null;
   }
 }
 

tests/node/build-info-test.js

@@ -62,10 +62,12 @@ QUnit.module('parseTagVersion', () => {
     });
   });
 
-  QUnit.test('parseTagVersion raises on non-semver tags', function (assert) {
-    assert.throws(() => {
-      parseTagVersion('some-non-version-tag');
-    });
+  QUnit.test('parseTagVersion returns null for non-semver tags', function (assert) {
+    assert.equal(parseTagVersion('some-non-version-tag'), null);
+  });
+
+  QUnit.test('parseTagVersion returns null for non-ember-source package tags', function (assert) {
+    assert.equal(parseTagVersion('v2.1.1-@glimmer/component'), null);
   });
 });
 
@@ -134,6 +136,27 @@ QUnit.module('buildFromParts', () => {
         isBuildForTag: true,
       },
     },
+    {
+      args: [
+        '3.4.4', // Non-ember-source tag (e.g. @glimmer/component) should be treated as channel build
+        {
+          sha: 'f572d396fae9206628714fb2ce00f72e94f2258f',
+          branch: 'main',
+          tag: 'v2.1.1-@glimmer/component',
+        },
+      ],
+      expected: {
+        tag: null,
+        branch: 'main',
+        sha: 'f572d396fae9206628714fb2ce00f72e94f2258f',
+        shortSha: 'f572d396',
+        channel: 'canary',
+        packageVersion: '3.4.4',
+        tagVersion: null,
+        version: '3.4.4-canary+f572d396',
+        isBuildForTag: false,
+      },
+    },
   ].forEach(({ args, expected }) => {
     QUnit.test(JSON.stringify(args), function (assert) {
       assert.deepEqual(buildFromParts(...args), expected);