ansible/source_control/subversion.py

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2012, 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 = '''
---
module: subversion
short_description: Deploys a subversion repository.
description:
- Deploy given repository URL / revision to dest. If dest exists, update to the specified revision, otherwise perform a checkout.
version_added: "0.7"
author: "Dane Summers (@dsummersl) <njharman@gmail.com>"
notes:
- Requires I(svn) to be installed on the client.
requirements: []
options:
repo:
description:
- The subversion URL to the repository.
required: true
aliases: [ name, repository ]
default: null
dest:
description:
- Absolute path where the repository should be deployed.
required: true
default: null
revision:
description:
- Specific revision to checkout.
required: false
default: HEAD
aliases: [ version ]
force:
description:
- If C(yes), modified files will be discarded. If C(no), module will fail if it encounters modified files.
Prior to 1.9 the default was `yes`.
required: false
default: "no"
choices: [ "yes", "no" ]
username:
description:
- --username parameter passed to svn.
required: false
default: null
password:
description:
- --password parameter passed to svn.
required: false
default: null
executable:
required: false
default: null
version_added: "1.4"
description:
- Path to svn executable to use. If not supplied,
the normal mechanism for resolving binary paths will be used.
export:
required: false
default: "no"
choices: [ "yes", "no" ]
version_added: "1.6"
description:
- If C(yes), do export instead of checkout/update.
switch:
required: false
default: "yes"
choices: [ "yes", "no" ]
version_added: "2.0"
description:
- If C(no), do not call svn switch before update.
'''
EXAMPLES = '''
# Checkout subversion repository to specified folder.
- subversion: repo=svn+ssh://an.example.org/path/to/repo dest=/src/checkout
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# Export subversion directory to folder
- subversion: repo=svn+ssh://an.example.org/path/to/repo dest=/src/export export=True
'''
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import re
import tempfile
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class Subversion(object):
def __init__(
self, module, dest, repo, revision, username, password, svn_path):
self.module = module
self.dest = dest
self.repo = repo
self.revision = revision
self.username = username
self.password = password
self.svn_path = svn_path
def _exec(self, args, check_rc=True):
'''Execute a subversion command, and return output. If check_rc is False, returns the return code instead of the output.'''
bits = [
self.svn_path,
'--non-interactive',
'--trust-server-cert',
'--no-auth-cache',
]
if self.username:
bits.extend(["--username", self.username])
if self.password:
bits.extend(["--password", self.password])
bits.extend(args)
rc, out, err = self.module.run_command(bits, check_rc)
if check_rc:
return out.splitlines()
else:
return rc
def is_svn_repo(self):
'''Checks if path is a SVN Repo.'''
rc = self._exec(["info", self.dest], check_rc=False)
return rc == 0
def checkout(self):
'''Creates new svn working directory if it does not already exist.'''
self._exec(["checkout", "-r", self.revision, self.repo, self.dest])
def export(self, force=False):
'''Export svn repo to directory'''
cmd = ["export"]
if force:
cmd.append("--force")
cmd.extend(["-r", self.revision, self.repo, self.dest])
self._exec(cmd)
def switch(self):
'''Change working directory's repo.'''
# switch to ensure we are pointing at correct repo.
self._exec(["switch", self.repo, self.dest])
def update(self):
'''Update existing svn working directory.'''
self._exec(["update", "-r", self.revision, self.dest])
def revert(self):
'''Revert svn working directory.'''
self._exec(["revert", "-R", self.dest])
def get_revision(self):
'''Revision and URL of subversion working directory.'''
text = '\n'.join(self._exec(["info", self.dest]))
rev = re.search(r'^Revision:.*$', text, re.MULTILINE).group(0)
url = re.search(r'^URL:.*$', text, re.MULTILINE).group(0)
return rev, url
def has_local_mods(self):
'''True if revisioned files have been added or modified. Unrevisioned files are ignored.'''
lines = self._exec(["status", "--quiet", "--ignore-externals", self.dest])
# The --quiet option will return only modified files.
# Match only revisioned files, i.e. ignore status '?'.
regex = re.compile(r'^[^?X]')
# Has local mods if more than 0 modifed revisioned files.
return len(filter(regex.match, lines)) > 0
def needs_update(self):
curr, url = self.get_revision()
out2 = '\n'.join(self._exec(["info", "-r", "HEAD", self.dest]))
head = re.search(r'^Revision:.*$', out2, re.MULTILINE).group(0)
rev1 = int(curr.split(':')[1].strip())
rev2 = int(head.split(':')[1].strip())
change = False
if rev1 < rev2:
change = True
return change, curr, head
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# ===========================================
def main():
module = AnsibleModule(
argument_spec=dict(
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dest=dict(required=True, type='path'),
repo=dict(required=True, aliases=['name', 'repository']),
revision=dict(default='HEAD', aliases=['rev', 'version']),
force=dict(default='no', type='bool'),
username=dict(required=False),
password=dict(required=False),
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executable=dict(default=None, type='path'),
export=dict(default=False, required=False, type='bool'),
switch=dict(default=True, required=False, type='bool'),
),
supports_check_mode=True
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)
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dest = module.params['dest']
repo = module.params['repo']
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revision = module.params['revision']
force = module.params['force']
username = module.params['username']
password = module.params['password']
svn_path = module.params['executable'] or module.get_bin_path('svn', True)
export = module.params['export']
switch = module.params['switch']
# We screenscrape a huge amount of svn commands so use C locale anytime we
# call run_command()
module.run_command_environ_update = dict(LANG='C', LC_ALL='C', LC_MESSAGES='C', LC_CTYPE='C')
svn = Subversion(module, dest, repo, revision, username, password, svn_path)
if export or not os.path.exists(dest):
before = None
local_mods = False
if module.check_mode:
module.exit_json(changed=True)
if not export:
svn.checkout()
else:
svn.export(force=force)
elif svn.is_svn_repo():
# Order matters. Need to get local mods before switch to avoid false
# positives. Need to switch before revert to ensure we are reverting to
# correct repo.
if module.check_mode:
check, before, after = svn.needs_update()
module.exit_json(changed=check, before=before, after=after)
before = svn.get_revision()
local_mods = svn.has_local_mods()
if switch:
svn.switch()
if local_mods:
if force:
svn.revert()
else:
module.fail_json(msg="ERROR: modified files exist in the repository.")
svn.update()
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else:
module.fail_json(msg="ERROR: %s folder already exists, but its not a subversion repository." % (dest, ))
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if export:
module.exit_json(changed=True)
else:
after = svn.get_revision()
changed = before != after or local_mods
module.exit_json(changed=changed, before=before, after=after)
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# import module snippets
from ansible.module_utils.basic import *
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main()