Fix: Let pontos-release -CC run when no initial tag is in the rep…

…ository. [#276]

Fix: Let pontos run when no initial `tag` is in the repository.

pontos/changelog/conventional_commits.py

@@ -69,9 +69,14 @@ def create_changelog_file(self) -> Union[Path, None]:
     def get_git_log(self) -> Union[List[str], None]:
         # https://stackoverflow.com/a/12083016/6725620
         # uses only latest tag for this branch
-        proc = self.shell_cmd_runner(
-            'git log "$(git describe --tags --abbrev=0)..HEAD" --oneline'
+        proc: subprocess.CompletedProcess = self.shell_cmd_runner(
+            "git describe --tags --abbrev=0"
         )
+        if proc.stdout and proc.stdout != '':
+            cmd: str = f'git log "{proc.stdout.strip()}..HEAD" --oneline'
+        else:
+            cmd: str = 'git log HEAD --oneline'
+        proc = self.shell_cmd_runner(cmd)
         if proc.stdout and proc.stdout != '':
             return proc.stdout.strip().split('\n')
         return None

tests/changelog/test_conventional_commits.py

@@ -45,6 +45,7 @@ def test_changelog_builder(self):
         config_toml = own_path / 'changelog.toml'
         release_version = '0.0.2'
         output = f'v{release_version}.md'
+        git_tag = "v0.0.1"
         git_log = (
             '1234567 Add: foo bar\n'
             '8abcdef Add: bar baz\n'
@@ -61,6 +62,8 @@ def test_changelog_builder(self):
 
         def runner(cmd):
             called.append(cmd)
+            if cmd == "git describe --tags --abbrev=0":
+                return StdOutput(git_tag)
             return StdOutput(git_log)
 
         cargs = Namespace(
@@ -111,7 +114,12 @@ def runner(cmd):
         )
 
         self.assertIn(
-            'git log "$(git describe --tags --abbrev=0)..HEAD" --oneline',
+            'git describe --tags --abbrev=0',
+            called,
+        )
+
+        self.assertIn(
+            'git log "v0.0.1..HEAD" --oneline',
             called,
         )