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ansible/library/source_control/hg

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#!/usr/bin/python
#-*- coding: utf-8 -*-
# (c) 2013, Yeukhon Wong <yeukhon@acm.org>
#
# This module was originally inspired by Brad Olson's ansible-module-mercurial
# <https://github.com/bradobro/ansible-module-mercurial>. This module tends
# to follow the git module implementation.
#
# 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/>.
import ConfigParser
DOCUMENTATION = '''
---
module: hg
short_description: Manages Mercurial (hg) repositories.
description:
- Manages Mercurial (hg) repositories. Supports SSH, HTTP/S and local address.
version_added: "1.0"
author: Yeukhon Wong
options:
repo:
description:
- The repository address.
required: true
default: null
aliases: [ name ]
dest:
description:
- Absolute path of where the repository should be cloned to.
required: true
default: null
revision:
description:
- Equivalent C(-r) option in hg command which could be the changeset, revision number,
branch name or even tag.
required: false
default: "default"
aliases: [ version ]
force:
description:
- Discards uncommitted changes. Runs C(hg update -C).
required: false
default: "yes"
choices: [ "yes", "no" ]
purge:
description:
- Deletes untracked files. Runs C(hg purge). Note this requires C(purge) extension to
be enabled if C(purge=yes). This module will modify hgrc file on behalf of the user
and undo the changes before exiting the task.
required: false
default: "no"
choices: [ "yes", "no" ]
executable:
required: false
default: null
version_added: "1.4"
description:
- Path to hg executable to use. If not supplied,
the normal mechanism for resolving binary paths will be used.
notes:
- "If the task seems to be hanging, first verify remote host is in C(known_hosts).
SSH will prompt user to authorize the first contact with a remote host. To avoid this prompt,
one solution is to add the remote host public key in C(/etc/ssh/ssh_known_hosts) before calling
the hg module, with the following command: ssh-keyscan remote_host.com >> /etc/ssh/ssh_known_hosts."
requirements: [ ]
'''
EXAMPLES = '''
# Ensure the current working copy is inside the stable branch and deletes untracked files if any.
- hg: repo=https://bitbucket.org/user/repo1 dest=/home/user/repo1 revision=stable purge=yes
'''
def _set_hgrc(hgrc, vals):
parser = ConfigParser.SafeConfigParser()
parser.read(hgrc)
# val is a list of triple-tuple of the form [(section, option, value),...]
for each in vals:
(section, option, value) = each
if not parser.has_section(section):
parser.add_section(section)
parser.set(section, option, value)
f = open(hgrc, 'w')
parser.write(f)
f.close()
def _undo_hgrc(hgrc, vals):
parser = ConfigParser.SafeConfigParser()
parser.read(hgrc)
for each in vals:
(section, option, value) = each
if parser.has_section(section):
parser.remove_option(section, option)
f = open(hgrc, 'w')
parser.write(f)
f.close()
class Hg(object):
def __init__(self, module, dest, repo, revision, hg_path):
self.module = module
self.dest = dest
self.repo = repo
self.revision = revision
self.hg_path = hg_path
def _command(self, args_list):
(rc, out, err) = self.module.run_command([self.hg_path] + args_list)
return (rc, out, err)
def _list_untracked(self):
return self._command(['purge', '-R', self.dest, '--print'])
def get_revision(self):
"""
hg id -b -i -t returns a string in the format:
"<changeset>[+] <branch_name> <tag>"
This format lists the state of the current working copy,
and indicates whether there are uncommitted changes by the
plus sign. Otherwise, the sign is omitted.
Read the full description via hg id --help
"""
(rc, out, err) = self._command(['id', '-b', '-i', '-t', '-R', self.dest])
if rc != 0:
self.module.fail_json(msg=err)
else:
return out.strip('\n')
def has_local_mods(self):
now = self.get_revision()
if '+' in now:
return True
else:
return False
def discard(self):
before = self.has_local_mods()
if not before:
return False
(rc, out, err) = self._command(['update', '-C', '-R', self.dest])
if rc != 0:
self.module.fail_json(msg=err)
after = self.has_local_mods()
if before != after and not after: # no more local modification
return True
def purge(self):
hgrc = os.path.join(self.dest, '.hg/hgrc')
purge_option = [('extensions', 'purge', '')]
_set_hgrc(hgrc, purge_option) # enable purge extension
# before purge, find out if there are any untracked files
(rc1, out1, err1) = self._list_untracked()
if rc1 != 0:
self.module.fail_json(msg=err1)
# there are some untrackd files
if out1 != '':
(rc2, out2, err2) = self._command(['purge', '-R', self.dest])
if rc2 == 0:
_undo_hgrc(hgrc, purge_option)
else:
self.module.fail_json(msg=err2)
return True
else:
return False
def cleanup(self, force, purge):
discarded = False
purged = False
if force:
discarded = self.discard()
if purge:
purged = self.purge()
if discarded or purged:
return True
else:
return False
def pull(self):
return self._command(
['pull', '-r', self.revision, '-R', self.dest, self.repo])
def update(self):
return self._command(['update', '-R', self.dest])
def clone(self):
return self._command(['clone', self.repo, self.dest, '-r', self.revision])
def switch_version(self):
return self._command(['update', '-r', self.revision, '-R', self.dest])
# ===========================================
def main():
module = AnsibleModule(
argument_spec = dict(
repo = dict(required=True, aliases=['name']),
dest = dict(required=True),
revision = dict(default="default", aliases=['version']),
force = dict(default='yes', type='bool'),
purge = dict(default='no', type='bool'),
executable = dict(default=None),
),
)
repo = module.params['repo']
dest = os.path.expanduser(module.params['dest'])
revision = module.params['revision']
force = module.params['force']
purge = module.params['purge']
hg_path = module.params['executable'] or module.get_bin_path('hg', True)
hgrc = os.path.join(dest, '.hg/hgrc')
# initial states
before = ''
changed = False
cleaned = False
hg = Hg(module, dest, repo, revision, hg_path)
# If there is no hgrc file, then assume repo is absent
# and perform clone. Otherwise, perform pull and update.
if not os.path.exists(hgrc):
(rc, out, err) = hg.clone()
if rc != 0:
module.fail_json(msg=err)
else:
# get the current state before doing pulling
before = hg.get_revision()
# can perform force and purge
cleaned = hg.cleanup(force, purge)
(rc, out, err) = hg.pull()
if rc != 0:
module.fail_json(msg=err)
(rc, out, err) = hg.update()
if rc != 0:
module.fail_json(msg=err)
hg.switch_version()
after = hg.get_revision()
if before != after or cleaned:
changed = True
module.exit_json(before=before, after=after, changed=changed, cleaned=cleaned)
# import module snippets
from ansible.module_utils.basic import *
main()
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