git source plugin: Track git tags and save them to reproduce a minimum shallow repository

Instead of tag information being fetched which can change with time,
they are tracked and saved in the projects.refs/.bst. Then we re-tag
automatically the closest tag so that `git describe` works and is
reproducible.

This new feature is opt-in with the new `track-tags` configuration,
and must be used to fix modules which are broken by our new policy
of omitting the `.git/` repository when staging git sources.

This fixes issue #487

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/testutils/repo/git.py b/tests/testutils/repo/git.py
index bc2dae691..fe3ebd547 100644
--- a/tests/testutils/repo/git.py
+++ b/tests/testutils/repo/git.py
@@ -45,6 +45,9 @@ class Git(Repo):
     def add_tag(self, tag):
         self._run_git('tag', tag)
 
+    def add_annotated_tag(self, tag, message):
+        self._run_git('tag', '-a', tag, '-m', message)
+
     def add_commit(self):
         self._run_git('commit', '--allow-empty', '-m', 'Additional commit')
         return self.latest_commit()
@@ -95,3 +98,14 @@ class Git(Repo):
 
     def branch(self, branch_name):
         self._run_git('checkout', '-b', branch_name)
+
+    def checkout(self, commit):
+        self._run_git('checkout', commit)
+
+    def merge(self, commit):
+        self._run_git('merge', '-m', 'Merge', commit)
+        return self.latest_commit()
+
+    def rev_parse(self, rev):
+        output = self._run_git('rev-parse', rev, stdout=subprocess.PIPE).stdout
+        return output.decode('UTF-8').strip()