Move _build_legacty_tag from GitRepository to to DebianGitRepository

and add doctest.

Git-Dch: Ignore

1 files changed, 13 insertions, 0 deletions

diff --git a/gbp/deb/git.py b/gbp/deb/git.py
index f8cefedf..5890df22 100644
--- a/gbp/deb/git.py
+++ b/gbp/deb/git.py
@@ -51,6 +51,19 @@ class DebianGitRepository(GitRepository):
         return None
 
     @staticmethod
+    def _build_legacy_tag(format, version):
+        """
+        Legacy tags (prior to 0.5.5) dropped epochs and didn't honor the '~'
+
+        >>> DebianGitRepository._build_legacy_tag('upstream/%(version)s', '1:2.0~3')
+        'upstream/2.0.3'
+        """
+        if ':' in version: # strip of any epochs
+            version = version.split(':', 1)[1]
+        version = version.replace('~', '.')
+        return format % dict(version=version)
+
+    @staticmethod
     def version_to_tag(format, version):
         """Generate a tag from a given format and a version