433 lines
16 KiB
Python
433 lines
16 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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DOCUMENTATION = '''
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---
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module: git
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author: Michael DeHaan
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version_added: "0.0.1"
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short_description: Deploy software (or files) from git checkouts
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description:
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- Manage I(git) checkouts of repositories to deploy files or software.
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options:
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repo:
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required: true
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aliases: [ name ]
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description:
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- git, SSH, or HTTP protocol address of the git repository.
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dest:
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required: true
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description:
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- Absolute path of where the repository should be checked out to.
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version:
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required: false
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default: "HEAD"
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description:
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- What version of the repository to check out. This can be the
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full 40-character I(SHA-1) hash, the literal string C(HEAD), a
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branch name, or a tag name.
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reference:
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required: false
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default: null
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version_added: "1.4"
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description:
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- Reference repository (see "git clone --reference ...")
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remote:
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required: false
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default: "origin"
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description:
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- Name of the remote.
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force:
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required: false
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default: "yes"
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choices: [ "yes", "no" ]
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version_added: "0.7"
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description:
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- If C(yes), any modified files in the working
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repository will be discarded. Prior to 0.7, this was always
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'yes' and could not be disabled.
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depth:
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required: false
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default: null
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version_added: "1.2"
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description:
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- Create a shallow clone with a history truncated to the specified
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number or revisions. The minimum possible value is C(1), otherwise
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ignored.
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update:
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required: false
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default: "yes"
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choices: [ "yes", "no" ]
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version_added: "1.2"
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description:
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- If C(yes), repository will be updated using the supplied
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remote. Otherwise the repo will be left untouched.
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Prior to 1.2, this was always 'yes' and could not be disabled.
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executable:
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required: false
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default: null
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version_added: "1.4"
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description:
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- Path to git executable to use. If not supplied,
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the normal mechanism for resolving binary paths will be used.
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bare:
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required: false
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default: "no"
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choices: [ "yes", "no" ]
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version_added: "1.4"
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description:
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- if C(yes), repository will be created as a bare repo, otherwise
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it will be a standard repo with a workspace.
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notes:
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- "If the task seems to be hanging, first verify remote host is in C(known_hosts).
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SSH will prompt user to authorize the first contact with a remote host. To avoid this prompt,
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one solution is to add the remote host public key in C(/etc/ssh/ssh_known_hosts) before calling
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the git module, with the following command: ssh-keyscan remote_host.com >> /etc/ssh/ssh_known_hosts."
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'''
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EXAMPLES = '''
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# Example git checkout from Ansible Playbooks
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- git: repo=git://foosball.example.org/path/to/repo.git
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dest=/srv/checkout
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version=release-0.22
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# Example read-write git checkout from github
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- git: repo=ssh://git@github.com/mylogin/hello.git dest=/home/mylogin/hello
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# Example just ensuring the repo checkout exists
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- git: repo=git://foosball.example.org/path/to/repo.git dest=/srv/checkout update=no
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'''
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import re
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import tempfile
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def get_version(git_path, dest, ref="HEAD"):
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''' samples the version of the git repo '''
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os.chdir(dest)
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cmd = "%s rev-parse %s" % (git_path, ref)
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sha = os.popen(cmd).read().rstrip("\n")
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return sha
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def clone(git_path, module, repo, dest, remote, depth, version, bare, reference):
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''' makes a new git repo if it does not already exist '''
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dest_dirname = os.path.dirname(dest)
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try:
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os.makedirs(dest_dirname)
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except:
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pass
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os.chdir(dest_dirname)
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cmd = [ git_path, 'clone' ]
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if bare:
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cmd.append('--bare')
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else:
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cmd.extend([ '--origin', remote, '--recursive' ])
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if is_remote_branch(git_path, module, dest, repo, version) \
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or is_remote_tag(git_path, module, dest, repo, version):
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cmd.extend([ '--branch', version ])
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if depth:
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cmd.extend([ '--depth', str(depth) ])
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if reference:
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cmd.extend([ '--reference', str(reference) ])
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cmd.extend([ repo, dest ])
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module.run_command(cmd, check_rc=True)
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if bare:
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os.chdir(dest)
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if remote != 'origin':
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module.run_command([git_path, 'remote', 'add', remote, repo], check_rc=True)
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def has_local_mods(git_path, dest, bare):
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if bare:
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return False
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os.chdir(dest)
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cmd = "%s status -s" % (git_path,)
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lines = os.popen(cmd).read().splitlines()
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lines = filter(lambda c: not re.search('^\\?\\?.*$', c), lines)
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return len(lines) > 0
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def reset(git_path, module, dest):
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'''
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Resets the index and working tree to HEAD.
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Discards any changes to tracked files in working
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tree since that commit.
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'''
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os.chdir(dest)
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cmd = "%s reset --hard HEAD" % (git_path,)
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return module.run_command(cmd, check_rc=True)
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def get_remote_head(git_path, module, dest, version, remote, bare):
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cloning = False
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if remote == module.params['repo']:
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cloning = True
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else:
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os.chdir(dest)
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if version == 'HEAD':
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if cloning:
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# cloning the repo, just get the remote's HEAD version
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cmd = '%s ls-remote %s -h HEAD' % (git_path, remote)
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else:
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head_branch = get_head_branch(git_path, module, dest, remote, bare)
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cmd = '%s ls-remote %s -h refs/heads/%s' % (git_path, remote, head_branch)
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elif is_remote_branch(git_path, module, dest, remote, version):
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cmd = '%s ls-remote %s -h refs/heads/%s' % (git_path, remote, version)
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elif is_remote_tag(git_path, module, dest, remote, version):
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cmd = '%s ls-remote %s -t refs/tags/%s' % (git_path, remote, version)
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else:
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# appears to be a sha1. return as-is since it appears
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# cannot check for a specific sha1 on remote
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return version
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(rc, out, err) = module.run_command(cmd, check_rc=True)
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if len(out) < 1:
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module.fail_json(msg="Could not determine remote revision for %s" % version)
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rev = out.split()[0]
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return rev
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def is_remote_tag(git_path, module, dest, remote, version):
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cmd = '%s ls-remote %s -t refs/tags/%s' % (git_path, remote, version)
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(rc, out, err) = module.run_command(cmd, check_rc=True)
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if version in out:
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return True
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else:
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return False
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def get_branches(git_path, module, dest):
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os.chdir(dest)
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branches = []
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cmd = '%s branch -a' % (git_path,)
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(rc, out, err) = module.run_command(cmd)
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if rc != 0:
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module.fail_json(msg="Could not determine branch data - received %s" % out)
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for line in out.split('\n'):
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branches.append(line.strip())
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return branches
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def is_remote_branch(git_path, module, dest, remote, version):
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cmd = '%s ls-remote %s -h refs/heads/%s' % (git_path, remote, version)
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(rc, out, err) = module.run_command(cmd, check_rc=True)
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if version in out:
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return True
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else:
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return False
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def is_local_branch(git_path, module, dest, branch):
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branches = get_branches(git_path, module, dest)
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lbranch = '%s' % branch
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if lbranch in branches:
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return True
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elif '* %s' % branch in branches:
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return True
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else:
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return False
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def is_not_a_branch(git_path, module, dest):
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branches = get_branches(git_path, module, dest)
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for b in branches:
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if b.startswith('* ') and 'no branch' in b:
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return True
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return False
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def get_head_branch(git_path, module, dest, remote, bare=False):
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'''
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Determine what branch HEAD is associated with. This is partly
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taken from lib/ansible/utils/__init__.py. It finds the correct
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path to .git/HEAD and reads from that file the branch that HEAD is
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associated with. In the case of a detached HEAD, this will look
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up the branch in .git/refs/remotes/<remote>/HEAD.
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'''
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if bare:
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repo_path = dest
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else:
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repo_path = os.path.join(dest, '.git')
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# Check if the .git is a file. If it is a file, it means that we are in a submodule structure.
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if os.path.isfile(repo_path):
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try:
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gitdir = yaml.safe_load(open(repo_path)).get('gitdir')
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# There is a posibility the .git file to have an absolute path.
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if os.path.isabs(gitdir):
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repo_path = gitdir
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else:
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repo_path = os.path.join(repo_path.split('.git')[0], gitdir)
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except (IOError, AttributeError):
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return ''
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# Read .git/HEAD for the name of the branch.
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# If we're in a detached HEAD state, look up the branch associated with
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# the remote HEAD in .git/refs/remotes/<remote>/HEAD
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f = open(os.path.join(repo_path, "HEAD"))
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if is_not_a_branch(git_path, module, dest):
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f.close()
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f = open(os.path.join(repo_path, 'refs', 'remotes', remote, 'HEAD'))
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branch = f.readline().split('/')[-1].rstrip("\n")
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f.close()
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return branch
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def fetch(git_path, module, repo, dest, version, remote, bare):
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''' updates repo from remote sources '''
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os.chdir(dest)
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if bare:
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(rc, out1, err1) = module.run_command([git_path, 'fetch', remote, '+refs/heads/*:refs/heads/*'])
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else:
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(rc, out1, err1) = module.run_command("%s fetch %s" % (git_path, remote))
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if rc != 0:
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module.fail_json(msg="Failed to download remote objects and refs")
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if bare:
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(rc, out2, err2) = module.run_command([git_path, 'fetch', remote, '+refs/tags/*:refs/tags/*'])
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else:
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(rc, out2, err2) = module.run_command("%s fetch --tags %s" % (git_path, remote))
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if rc != 0:
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module.fail_json(msg="Failed to download remote objects and refs")
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(rc, out3, err3) = submodule_update(git_path, module, dest)
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return (rc, out1 + out2 + out3, err1 + err2 + err3)
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def submodule_update(git_path, module, dest):
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''' init and update any submodules '''
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os.chdir(dest)
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# skip submodule commands if .gitmodules is not present
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if not os.path.exists(os.path.join(dest, '.gitmodules')):
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return (0, '', '')
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cmd = [ git_path, 'submodule', 'sync' ]
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(rc, out, err) = module.run_command(cmd, check_rc=True)
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cmd = [ git_path, 'submodule', 'update', '--init', '--recursive' ]
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(rc, out, err) = module.run_command(cmd)
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if rc != 0:
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module.fail_json(msg="Failed to init/update submodules")
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return (rc, out, err)
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def switch_version(git_path, module, dest, remote, version):
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''' once pulled, switch to a particular SHA, tag, or branch '''
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os.chdir(dest)
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cmd = ''
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if version != 'HEAD':
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if is_remote_branch(git_path, module, dest, remote, version):
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if not is_local_branch(git_path, module, dest, version):
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cmd = "%s checkout --track -b %s %s/%s" % (git_path, version, remote, version)
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else:
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(rc, out, err) = module.run_command("%s checkout --force %s" % (git_path, version))
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if rc != 0:
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module.fail_json(msg="Failed to checkout branch %s" % version)
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cmd = "%s reset --hard %s/%s" % (git_path, remote, version)
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else:
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cmd = "%s checkout --force %s" % (git_path, version)
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else:
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branch = get_head_branch(git_path, module, dest, remote)
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(rc, out, err) = module.run_command("%s checkout --force %s" % (git_path, branch))
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if rc != 0:
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module.fail_json(msg="Failed to checkout branch %s" % branch)
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cmd = "%s reset --hard %s" % (git_path, remote)
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(rc, out1, err1) = module.run_command(cmd)
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if rc != 0:
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if version != 'HEAD':
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module.fail_json(msg="Failed to checkout %s" % (version))
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else:
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module.fail_json(msg="Failed to checkout branch %s" % (branch))
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(rc, out2, err2) = submodule_update(git_path, module, dest)
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return (rc, out1 + out2, err1 + err2)
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# ===========================================
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def main():
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module = AnsibleModule(
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argument_spec = dict(
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dest=dict(required=True),
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repo=dict(required=True, aliases=['name']),
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version=dict(default='HEAD'),
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remote=dict(default='origin'),
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reference=dict(default=None),
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force=dict(default='yes', type='bool'),
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depth=dict(default=None, type='int'),
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update=dict(default='yes', type='bool'),
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executable=dict(default=None),
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bare=dict(default='no', type='bool'),
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),
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supports_check_mode=True
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)
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dest = os.path.abspath(os.path.expanduser(module.params['dest']))
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repo = module.params['repo']
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version = module.params['version']
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remote = module.params['remote']
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force = module.params['force']
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depth = module.params['depth']
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update = module.params['update']
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bare = module.params['bare']
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reference = module.params['reference']
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git_path = module.params['executable'] or module.get_bin_path('git', True)
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if bare:
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gitconfig = os.path.join(dest, 'config')
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else:
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gitconfig = os.path.join(dest, '.git', 'config')
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rc, out, err, status = (0, None, None, None)
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# if there is no git configuration, do a clone operation
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# else pull and switch the version
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before = None
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local_mods = False
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if not os.path.exists(gitconfig):
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if module.check_mode:
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remote_head = get_remote_head(git_path, module, dest, version, repo, bare)
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module.exit_json(changed=True, before=before, after=remote_head)
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clone(git_path, module, repo, dest, remote, depth, version, bare, reference)
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elif not update:
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# Just return having found a repo already in the dest path
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# this does no checking that the repo is the actual repo
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# requested.
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before = get_version(git_path, dest)
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module.exit_json(changed=False, before=before, after=before)
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else:
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# else do a pull
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local_mods = has_local_mods(git_path, dest, bare)
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before = get_version(git_path, dest)
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if local_mods:
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# failure should happen regardless of check mode
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if not force:
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module.fail_json(msg="Local modifications exist in repository (force=no).")
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# if force and in non-check mode, do a reset
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if not module.check_mode:
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reset(git_path, module, dest)
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# exit if already at desired sha version
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remote_head = get_remote_head(git_path, module, dest, version, remote, bare)
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if before == remote_head:
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if local_mods:
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module.exit_json(changed=True, before=before, after=remote_head,
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msg="Local modifications exist")
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else:
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module.exit_json(changed=False, before=before, after=remote_head)
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if module.check_mode:
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module.exit_json(changed=True, before=before, after=remote_head)
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fetch(git_path, module, repo, dest, version, remote, bare)
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# switch to version specified regardless of whether
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# we cloned or pulled
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if not bare:
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switch_version(git_path, module, dest, remote, version)
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# determine if we changed anything
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after = get_version(git_path, dest)
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changed = False
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if before != after or local_mods:
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changed = True
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module.exit_json(changed=changed, before=before, after=after)
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# include magic from lib/ansible/module_common.py
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#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
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main()
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