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Add check mode to git module

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Related to issue #2114.  This hooks in check_mode to git module.  This
will exit with changed=True at the following places:

* If the repo has not been cloned
* If the destination has local modifications, this will exit with
  changed=True.  This is because reset() will exit anyways if there are
  local mods and force is False.
* If the remote HEAD commit id is not the same as that of the local HEAD.
  This is determined by get_remote_head() that runs 'git ls-remote' to
  determine remote HEAD.

Lastly, if this is run with check_mode enabled, this will exit with
changed=False before fetch() is invoked so that no local mods are made.
This commit is contained in:
Stephen Fromm 2013-03-14 22:29:04 -07:00
parent fc8d9377d5
commit 73772a41e6
1 changed files with 26 additions and 1 deletions
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27
library/git
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@ -103,6 +103,17 @@ def reset(module,dest,force):
module.fail_json(msg="Local modifications exist in repository (force=no).") module.fail_json(msg="Local modifications exist in repository (force=no).")
return module.run_command("git reset --hard HEAD", check_rc=True) return module.run_command("git reset --hard HEAD", check_rc=True)
def get_remote_head(module, dest, version, remote):
if version == 'HEAD':
version = get_head_branch(module, dest, remote)
os.chdir(dest)
cmd = "git ls-remote %s -h refs/heads/%s" % (remote, version)
(rc, out, err) = module.run_command(cmd, check_rc=True)
if len(out) < 1:
module.fail_json(msg="Could not determine remote revision for %s" % version)
rev = out.split()[0]
return rev
def get_branches(module, dest): def get_branches(module, dest):
os.chdir(dest) os.chdir(dest)
branches = [] branches = []
@ -224,7 +235,8 @@ def main():
version=dict(default='HEAD'), version=dict(default='HEAD'),
remote=dict(default='origin'), remote=dict(default='origin'),
force=dict(default='yes', type='bool') force=dict(default='yes', type='bool')
) ),
supports_check_mode=True
) )
dest = os.path.abspath(os.path.expanduser(module.params['dest'])) dest = os.path.abspath(os.path.expanduser(module.params['dest']))
@ -242,14 +254,27 @@ def main():
before = None before = None
local_mods = False local_mods = False
if not os.path.exists(gitconfig): if not os.path.exists(gitconfig):
if module.check_mode:
module.exit_json(changed=True)
(rc, out, err) = clone(module, repo, dest, remote) (rc, out, err) = clone(module, repo, dest, remote)
else: else:
# else do a pull # else do a pull
local_mods = has_local_mods(dest) local_mods = has_local_mods(dest)
before = get_version(dest) before = get_version(dest)
# if force, do a reset
if local_mods and module.check_mode:
module.exit_json(changed=True, msg='Local modifications exist')
(rc, out, err) = reset(module,dest,force) (rc, out, err) = reset(module,dest,force)
if rc != 0: if rc != 0:
module.fail_json(msg=err) module.fail_json(msg=err)
# check or get changes from remote
remote_head = get_remote_head(module, dest, version, remote)
if module.check_mode:
remote_head = remote_head[0:7]
if before != remote_head:
module.exit_json(changed=True, before=before, after=remote_head)
else:
module.exit_json(changed=False, before=before, after=remote_head)
(rc, out, err) = fetch(module, repo, dest, version, remote) (rc, out, err) = fetch(module, repo, dest, version, remote)
if rc != 0: if rc != 0:
module.fail_json(msg=err) module.fail_json(msg=err)