Add functionality for doing git commands in a directory

These commands are:

    * git fat <init|push|pull>
    * git pull

They are required for the morph add-binary and push/pull plugins. Also
make sure that GitDirectory is working in the root directory of the
specified git repository, and add some helper functions for handling
paths of files in the working tree.

1 files changed, 32 insertions, 2 deletions

diff --git a/morphlib/gitdir.py b/morphlib/gitdir.py
index 15079231..15c0ee9f 100644
--- a/morphlib/gitdir.py
+++ b/morphlib/gitdir.py
@@ -317,6 +317,14 @@ class Remote(object):
                                    self._parse_push_output(out), err)
         return self._parse_push_output(out)
 
+    def pull(self, branch=None): # pragma: no cover
+        if branch:
+            repo = self.get_fetch_url()
+            ret = self.gd._runcmd(['git', 'pull', repo, branch])
+        else:
+            ret = self.gd._runcmd(['git', 'pull'])
+        return ret
+
 
 class GitDirectory(object):
 
@@ -330,7 +338,11 @@ class GitDirectory(object):
     '''
 
     def __init__(self, dirname):
-        self.dirname = dirname
+        self.dirname = morphlib.util.find_root(dirname, '.git')
+        # if we are in a bare repo, self.dirname will now be None
+        # so we just use the provided dirname
+        if not self.dirname:
+            self.dirname = dirname
 
     def _runcmd(self, argv, **kwargs):
         '''Run a command at the root of the git directory.
@@ -616,12 +628,30 @@ class GitDirectory(object):
             ['git', 'describe', '--always', '--dirty=-unreproducible'])
         return version.strip()
 
+    def fat_init(self): # pragma: no cover
+        return self._runcmd(['git', 'fat', 'init'])
+
+    def fat_push(self): # pragma: no cover
+        return self._runcmd(['git', 'fat', 'push'])
+
+    def fat_pull(self): # pragma: no cover
+        return self._runcmd(['git', 'fat', 'pull'])
+
+    def has_fat(self): # pragma: no cover
+        return '.gitfat' in self.list_files()
+
+    def join_path(self, path): # pragma: no cover
+        return os.path.join(self.dirname, path)
+
+    def get_relpath(self, path): # pragma: no cover
+        return os.path.relpath(path, self.dirname)
+
 
 def init(dirname):
     '''Initialise a new git repository.'''
 
+    cliapp.runcmd(['git', 'init'], cwd=dirname)
     gd = GitDirectory(dirname)
-    gd._runcmd(['git', 'init'])
     return gd