feat(github): push coverage info from tags (#284)

Modify the logic of getting the branch information to also be able
to parse out the tag name when dealing with a tag push event on
Github Actions.

coveralls/git.py

@@ -32,7 +32,10 @@ def git_branch():
     branch = None
     if os.environ.get('GITHUB_ACTIONS'):
         github_ref = os.environ.get('GITHUB_REF')
-        if github_ref.startswith('refs/heads/'):
+        if (
+            github_ref.startswith('refs/heads/')
+            or github_ref.startswith('refs/tags/')
+        ):
             # E.g. in push events.
             branch = github_ref.split('/', 2)[-1]
         else:

tests/git_test.py

@@ -125,6 +125,16 @@ def test_gitinfo_github_pr(self):
         'GITHUB_SHA': 'bb0e00166b28f49db04d6a8b8cb4bddb5afa529f',
         'GITHUB_HEAD_REF': ''
     }, clear=True)
-    def test_gitinfo_github_nopr(self):
+    def test_gitinfo_github_branch(self):
         git_info = coveralls.git.git_info()
         assert git_info['git']['branch'] == 'master'
+
+    @mock.patch.dict(os.environ, {
+        'GITHUB_ACTIONS': 'true',
+        'GITHUB_REF': 'refs/tags/v1.0',
+        'GITHUB_SHA': 'bb0e00166b28f49db04d6a8b8cb4bddb5afa529f',
+        'GITHUB_HEAD_REF': ''
+    }, clear=True)
+    def test_gitinfo_github_tag(self):
+        git_info = coveralls.git.git_info()
+        assert git_info['git']['branch'] == 'v1.0'