oeqa/utils/gitarchive: fall back to local tags when listing existing tags

e9cff55e73cc has switched tag listing from bare "git tag" to "git
ls-remote" to make sure not to miss remote tags which are not fetched
locally. This mechanism first checks for configured remote repository, next
for possibly passed url, and then fails if none worked.

However there are still cases where no remote repository is
configured and no url is provided (for instance: buildperf tests use an
empty git directory to store tests). Fix those cases by putting back the
old behavior (local tags check) as last resort, with at least a warning for
future diagnostics if we still encounter tagging issues

Fixes: e9cff55e73cc ("oeqa/utils/gitarchive: fix tag computation when creating archive")
(From OE-Core rev: 34e1f845687d2f7169f5d6c1bb54e1a7ab5412c4)

Signed-off-by: Alexis Lothoré <alexis.lothore@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/cases/gitarchivetests.py

@@ -115,13 +115,15 @@ class GitArchiveTests(OESelftestTestCase):
         self.assertIn("yocto-4.2", tags)
         delete_fake_repository(path)
 
-    def test_get_tags_without_valid_remote_neither_url(self):
-        url = 'git://git.yoctoproject.org/poky'
-        path, git_obj = create_fake_repository(False, None, False)
+    def test_get_tags_with_only_local_tag(self):
+        fake_tags_list=["main/10-g0f7d5df/0", "main/10-g0f7d5df/1", "foo/20-g2468f5d/0"]
+        path, git_obj = create_fake_repository(True, fake_tags_list, False)
 
-        """Test for some well established tags (released tags)"""
-        with self.assertRaises(GitError):
-            tags = ga.get_tags(git_obj, self.log, pattern="yocto-*")
+        """No remote is configured and no url is passed: get_tags must fall
+        back to local tags
+        """
+        tags = ga.get_tags(git_obj, self.log)
+        self.assertCountEqual(tags, fake_tags_list)
         delete_fake_repository(path)
 
     def test_get_tags_without_valid_remote_and_wrong_url(self):

meta/lib/oeqa/utils/gitarchive.py

@@ -116,18 +116,25 @@ def get_tags(repo, log, pattern=None, url=None):
         cmd.append(pattern)
     try:
         tags_refs = repo.run_cmd(cmd)
+        tags = ["".join(d.split()[1].split('/', 2)[2:]) for d in tags_refs.splitlines()]
     except GitError as e:
         # If it fails, retry with repository url if one is provided
-        if not url:
-            raise(e)
-        log.info("No remote repository configured, use provided url")
-        cmd = base_cmd.copy()
-        cmd.append(url)
-        if pattern:
-            cmd.append(pattern)
-        tags_refs = repo.run_cmd(cmd)
+        if url:
+            log.info("No remote repository configured, use provided url")
+            cmd = base_cmd.copy()
+            cmd.append(url)
+            if pattern:
+                cmd.append(pattern)
+            tags_refs = repo.run_cmd(cmd)
+            tags = ["".join(d.split()[1].split('/', 2)[2:]) for d in tags_refs.splitlines()]
+        else:
+            log.warning("Read local tags only, some remote tags may be missed")
+            cmd = ["tag"]
+            if pattern:
+                cmd += ["-l", pattern]
+            tags = repo.run_cmd(cmd).splitlines()
 
-    return ["".join(d.split()[1].split('/', 2)[2:]) for d in tags_refs.splitlines()]
+    return tags
 
 def expand_tag_strings(repo, name_pattern, msg_subj_pattern, msg_body_pattern,
                        url, log, keywords):