From 98a776333f07021c6e31993a24d5a78ce38e36ea Mon Sep 17 00:00:00 2001
From: Mathias Klette <mathias.klette@profitbricks.com>
Date: Fri, 16 Sep 2011 19:40:18 +0200
Subject: [PATCH] fix: upstream branch must be treeish

---
 debian_build.py   |  4 ++++
 lib/git_helper.py | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/debian_build.py b/debian_build.py
index 6feafd7..1ca7070 100755
--- a/debian_build.py
+++ b/debian_build.py
@@ -276,6 +276,10 @@ if __name__ == '__main__':
             logger.error('Could not determine GIT_UPSTREAM_BRANCH')
             exit_error()
 
+    # git-buildpackage uses only treeish object in v0.5.10,
+    # let's fetch it correctly:
+    GIT_UPSTREAM_BRANCH = git_helper.git_get_treeish(GIT_UPSTREAM_BRANCH)
+
     repo = git.repo.Repo()
 
     if GIT_DEBIAN_BRANCH != 'master':
diff --git a/lib/git_helper.py b/lib/git_helper.py
index 1ece9f8..9312a4c 100644
--- a/lib/git_helper.py
+++ b/lib/git_helper.py
@@ -244,4 +244,46 @@ def git_commit(message, paths=("-a",)):
     logger.debug('changes for %s commited' %(' '.join(paths)))
     return True
 
+def git_get_treeish(refname):
+    """
+    Return treeish reference as a string for any valid refspec. 
+    """
+    cmd = [
+        GIT, 
+        'show --oneline', 
+        '%s' % refname,
+        '|awk \'{print $1\}\''
+    ]
+    cmdobj = subprocess.Popen(
+            cmd,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            shell=False,
+            env={'':''},
+            cwd=os.getcwd(),
+            close_fds=True
+    )
+
+    logger.debug(
+            'calling "%s" ' %(' '.join(cmd))
+    )
+    ret = cmdobj.wait()
+    if ret:
+        error_str = cmdobj.stderr.read()
+        if not error_str:
+            error_str = cmdobj.stdout.read()
+        if not error_str:
+            error_str = 'No Error Msg found'
+        logger.error(
+                '%s returned with %s. Output was: %s'
+                %(' '.join(cmd), ret, error_str)
+        )
+        return None
+    else:
+        stdout_str = cmdobj.stdout.read()
+        logger.debug(
+            'found treeish "%s" for refspec "%s"' % (refname, stdout_str)
+        )
+        return stdout_str
+
 # vim: autoindent smartindent tabstop=4 expandtab shiftwidth=4 softtabstop=4 nu enc=utf-8 cinwords=if,elif,else,for,while,try,except,finally,def,class
-- 
2.39.5