From ed3200cd69b0422d32a70095f5aa46f2fa574556 Mon Sep 17 00:00:00 2001
From: Holger Levsen <holger@layer-acht.org>
Date: Wed, 8 Feb 2012 19:04:06 +0100
Subject: [PATCH] lets try to get rid of the double clone

---
 debian_build.py   | 10 ++++------
 lib/git_helper.py | 33 +++++++++++++++++++--------------
 2 files changed, 23 insertions(+), 20 deletions(-)

diff --git a/debian_build.py b/debian_build.py
index cf7bf39..66b97bd 100755
--- a/debian_build.py
+++ b/debian_build.py
@@ -260,12 +260,10 @@ if __name__ == '__main__':
     repo = git.repo.Repo()
 
     #if GIT_BRANCH_NAME != 'master':
-        #git_helper.git_new_branch_from(
-    # FIXME: error checking... (as below)
-    git_helper.git_checkout_branch(
-                GIT_BRANCH_NAME) #,
-        #        os.path.join('origin', GIT_BRANCH_NAME)
-        #)
+    git_helper.git_new_branch_from(
+                GIT_BRANCH_NAME,
+                os.path.join('origin', GIT_BRANCH_NAME)
+        )
 
     # git-buildpackage uses only treeish object in v0.5.10, so let's fetch the 
     # treeish refspec when a name was given (i.e. tag names, branch names, 
diff --git a/lib/git_helper.py b/lib/git_helper.py
index 228f63a..ae03728 100644
--- a/lib/git_helper.py
+++ b/lib/git_helper.py
@@ -71,10 +71,27 @@ def git_clone_remote_repository(url, destination):
     return True
 
 def git_new_branch_from(branch_name, from_branch):
+    if git_repo_has_branch(branch_name):
+    cmd = [GIT, 'branch', '-D', branch_name]
+
+    cmdobj = subprocess.Popen(
+            cmd,
+            shell=False,
+            close_fds=True,
+            stderr=subprocess.PIPE,
+            stdout=subprocess.PIPE,
+            env={'':''},
+            cwd=os.getcwd()
+    )
+    cmd = [GIT, 'checkout', branch_name]
+
+    # this should not happen, we just deleted it
     if git_repo_has_branch(branch_name):
         raise BranchExistError(branch_name)
-#    if not git_repo_has_branch(from_branch):
-#        raise BranchNotExistError(from_branch)
+
+    #if not git_repo_has_branch(from_branch):
+    #    raise BranchNotExistError(from_branch)
+
     cmd = [GIT, 'checkout', '-b', branch_name, from_branch]
 
     cmdobj = subprocess.Popen(
@@ -118,18 +135,6 @@ def git_checkout_branch(branch_name):
     #if not git_repo_has_branch(branch_name):
     #raise BranchNotExistError(branch_name)
 
-    cmd = [GIT, 'reset', '--hard']
-
-    cmdobj = subprocess.Popen(
-            cmd,
-            shell=False,
-            close_fds=True,
-            stderr=subprocess.PIPE,
-            stdout=subprocess.PIPE,
-            env={'':''},
-            cwd=os.getcwd()
-    )
-    cmd = [GIT, 'checkout', branch_name]
 
     cmdobj = subprocess.Popen(
             cmd,
-- 
2.39.5