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Rewrite switch_version() to detect branch

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Rewrote switch_version() to read .git/HEAD to find branch associated
with HEAD.  If in a detached HEAD state, will read
.git/refs/remotes/<remote>/HEAD.
This commit is contained in:
Stephen Fromm 2012-11-07 16:33:22 -08:00
commit 6aa51a7cf3
1 changed files with 30 additions and 11 deletions
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41
library/git
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@ -149,15 +149,35 @@ def is_not_a_branch(module, dest):
return False return False
def get_head_branch(module, dest, remote): def get_head_branch(module, dest, remote):
os.chdir(dest) '''
head = '' Determine what branch HEAD is associated with. This is partly
(rc, out, err) = _run("git remote show %s" % remote) taken from lib/ansible/utils/__init__.py. It finds the correct
if rc != 0: path to .git/HEAD and reads from that file the branch that HEAD is
module.fail_json(msg="Could not determine HEAD branch via git remote show") associated with. In the case of a detached HEAD, this will look
for line in out.split('\n'): up the branch in .git/refs/remotes/<remote>/HEAD.
if 'HEAD branch' in line: '''
head = line.split()[-1].strip() repo_path = os.path.join(dest, '.git')
return head # Check if the .git is a file. If it is a file, it means that we are in a submodule structure.
if os.path.isfile(repo_path):
try:
gitdir = yaml.load(open(repo_path)).get('gitdir')
# There is a posibility the .git file to have an absolute path.
if os.path.isabs(gitdir):
repo_path = gitdir
else:
repo_path = os.path.join(repo_path.split('.git')[0], gitdir)
except (IOError, AttributeError):
return ''
# Read .git/HEAD for the name of the branch.
# If we're in a detached HEAD state, look up the branch associated with
# the remote HEAD in .git/refs/remotes/<remote>/HEAD
f = open(os.path.join(repo_path, "HEAD"))
if is_not_a_branch(module, dest):
f.close()
f = open(os.path.join(repo_path, 'refs', 'remotes', remote, 'HEAD'))
branch = f.readline().split('/')[-1].rstrip("\n")
f.close()
return branch
def fetch(module, repo, dest, version, remote): def fetch(module, repo, dest, version, remote):
''' updates repo from remote sources ''' ''' updates repo from remote sources '''
@ -181,12 +201,11 @@ def switch_version(module, dest, remote, version):
else: else:
cmd = "git checkout --force %s" % version cmd = "git checkout --force %s" % version
else: else:
# is there a better way to do this?
branch = get_head_branch(module, dest, remote) branch = get_head_branch(module, dest, remote)
(rc, out, err) = _run("git checkout --force %s" % branch) (rc, out, err) = _run("git checkout --force %s" % branch)
if rc != 0: if rc != 0:
module.fail_json(msg="Failed to checkout branch %s" % branch) module.fail_json(msg="Failed to checkout branch %s" % branch)
cmd = "git rebase %s" % remote cmd = "git reset --hard %s" % remote
return _run(cmd) return _run(cmd)
# =========================================== # ===========================================