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ansible/library/bzr

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2013, André Paramés <git@andreparames.com>
# Based on the Git module by Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
DOCUMENTATION = u'''
---
module: bzr
author: André Paramés
version_added: "1.1"
short_description: Deploy software (or files) from bzr branches
description:
- Manage I(bzr) branches to deploy files or software.
options:
parent:
required: true
aliases: [ name ]
description:
- SSH or HTTP protocol address of the parent branch.
dest:
required: true
description:
- Absolute path of where the branch should be cloned to.
version:
required: false
default: "head"
description:
- What version of the branch to clone. This can be the
bzr revno or revid.
force:
required: false
default: "yes"
choices: [ yes, no ]
description:
- If C(yes), any modified files in the working
tree will be discarded.
examples:
- code: "bzr parent=bzr+ssh://foosball.example.org/path/to/branch dest=/srv/checkout version=22"
description: Example bzr checkout from Ansible Playbooks
'''
import re
import tempfile
def get_version(dest):
''' samples the version of the bzr branch'''
os.chdir(dest)
cmd = "bzr revno"
revno = os.popen(cmd).read().strip()
return revno
def clone(module, parent, dest, version):
''' makes a new bzr branch if it does not already exist '''
dest_dirname = os.path.dirname(dest)
try:
os.makedirs(dest_dirname)
except:
pass
os.chdir(dest_dirname)
if version.lower() != 'head':
cmd = "bzr branch -r %s %s %s" % (version, parent, dest)
else:
cmd = "bzr branch %s %s" % (parent, dest)
return module.run_command(cmd, check_rc=True)
def has_local_mods(dest):
os.chdir(dest)
cmd = "bzr status -S"
lines = os.popen(cmd).read().splitlines()
lines = filter(lambda c: not re.search('^\\?\\?.*$', c), lines)
return len(lines) > 0
def reset(module,dest,force):
'''
Resets the index and working tree to head.
Discards any changes to tracked files in the working
tree since that commit.
'''
os.chdir(dest)
if not force and has_local_mods(dest):
module.fail_json(msg="Local modifications exist in branch (force=no).")
return module.run_command("bzr revert", check_rc=True)
def fetch(module, dest, version):
''' updates branch from remote sources '''
os.chdir(dest)
if version.lower() != 'head':
(rc, out, err) = module.run_command("bzr pull -r %s" % version)
else:
(rc, out, err) = module.run_command("bzr pull")
if rc != 0:
module.fail_json(msg="Failed to pull")
return (rc, out, err)
def switch_version(module, dest, version):
''' once pulled, switch to a particular revno or revid'''
os.chdir(dest)
cmd = ''
if version.lower() != 'head':
cmd = "bzr revert -r %s" % version
else:
cmd = "bzr revert"
return module.run_command(cmd, check_rc=True)
# ===========================================
def main():
module = AnsibleModule(
argument_spec = dict(
dest=dict(required=True),
parent=dict(required=True, aliases=['name']),
version=dict(default='head'),
force=dict(default='yes', type='bool')
)
)
dest = os.path.abspath(os.path.expanduser(module.params['dest']))
parent = module.params['parent']
version = module.params['version']
force = module.params['force']
bzrconfig = os.path.join(dest, '.bzr', 'branch', 'branch.conf')
rc, out, err, status = (0, None, None, None)
# if there is no bzr configuration, do a branch operation
# else pull and switch the version
before = None
local_mods = False
if not os.path.exists(bzrconfig):
(rc, out, err) = clone(module, parent, dest, version)
else:
# else do a pull
local_mods = has_local_mods(dest)
before = get_version(dest)
(rc, out, err) = reset(module, dest, force)
if rc != 0:
module.fail_json(msg=err)
(rc, out, err) = fetch(module, dest, version)
if rc != 0:
module.fail_json(msg=err)
# switch to version specified regardless of whether
# we cloned or pulled
(rc, out, err) = switch_version(module, dest, version)
# determine if we changed anything
after = get_version(dest)
changed = False
if before != after or local_mods:
changed = True
module.exit_json(changed=changed, before=before, after=after)
# include magic from lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()