add GitRepository.is_empty and create_repo helpers

diff --git a/gbp/git_utils.py b/gbp/git_utils.py
index 90926f00749d99e3254f7c96621fd12cffd43d88..da8884e2b7772b7338cd3035308d08d27f6aafe4 100644 (file)
--- a/gbp/git_utils.py
+++ b/gbp/git_utils.py
@@ -5,7 +5,7 @@
 
 import subprocess
 import os.path
-from command_wrappers import (GitAdd, GitRm, GitCheckoutBranch, copy_from)
+from command_wrappers import (GitAdd, GitRm, GitCheckoutBranch, GitInit, copy_from)
 import dateutil.parser
 import calendar
 
@@ -90,6 +90,14 @@ class GitRepository(object):
             ret = True
         return (ret, "".join(out))
 
+    def is_empty(self):
+        """returns True if repo is empty (doesn't have any commits)"""
+        # an empty repo has no branches:
+        if self.get_branch():
+            return False
+        else:
+            return True
+
     def index_files(self):
         """List files in the index"""
         out, ret = self.__git_getoutput('ls-files', ['-z'])
@@ -146,6 +154,22 @@ class GitRepository(object):
         return not self.is_clean()[0]
 
 
+def create_repo(path):
+    """create a repository at path"""
+    abspath = os.path.abspath(path)
+    pwd = os.path.abspath(os.curdir)
+    try:
+        os.makedirs(abspath)
+        os.chdir(abspath)
+        GitInit()()
+        return GitRepository(abspath)
+    except OSError, err:
+        raise GitRepositoryError, "Cannot create Git repository at %s: %s "% err[1]
+    finally:
+        os.chdir(pwd)
+    return None
+
+
 def build_tag(format, version):
     """Generate a tag from a given format and a version"""
     return format % dict(version=sanitize_version(version))