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271 lines
9.1 KiB
Python
271 lines
9.1 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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git I(SHA), the literal string C(HEAD), a branch name, or a tag name.
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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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examples:
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- code: "git: repo=git://foosball.example.org/path/to/repo.git dest=/srv/checkout version=release-0.22"
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description: Example git checkout from Ansible Playbooks
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'''
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import re
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import tempfile
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def get_version(dest):
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''' samples the version of the git repo '''
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os.chdir(dest)
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cmd = "git show --abbrev-commit"
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sha = os.popen(cmd).read().split("\n")
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sha = sha[0].split()[1]
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return sha
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def clone(module, repo, dest, remote):
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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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return module.run_command("git clone -o %s %s %s" % (remote, repo, dest),
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check_rc=True)
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def has_local_mods(dest):
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os.chdir(dest)
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cmd = "git status -s"
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lines = os.popen(cmd).read().splitlines()
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lines = filter(lambda c: re.search('^\\?\\?.*$',c) == None,lines)
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return len(lines) > 0
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def reset(module,dest,force):
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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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if not force and has_local_mods(dest):
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module.fail_json(msg="Local modifications exist in repository (force=no).")
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return module.run_command("git reset --hard HEAD", check_rc=True)
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def get_branches(module, dest):
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os.chdir(dest)
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branches = []
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(rc, out, err) = module.run_command("git branch -a")
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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(module, dest, remote, branch):
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branches = get_branches(module, dest)
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rbranch = 'remotes/%s/%s' % (remote, branch)
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if rbranch 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_local_branch(module, dest, branch):
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branches = get_branches(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_current_branch(module, dest, branch):
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branches = get_branches(module, dest)
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for b in branches:
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if b.startswith('* '):
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cur_branch = b
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if branch == cur_branch or '* %s' % branch == cur_branch:
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return True
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else:
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return True
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def is_not_a_branch(module, dest):
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branches = get_branches(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(module, dest, remote):
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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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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.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(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(module, repo, dest, version, remote):
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''' updates repo from remote sources '''
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os.chdir(dest)
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(rc, out1, err1) = module.run_command("git fetch %s" % 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, out2, err2) = module.run_command("git fetch --tags %s" % 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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return (rc, out1 + out2, err1 + err2)
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def switch_version(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(module, dest, remote, version):
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if not is_local_branch(module, dest, version):
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cmd = "git checkout --track -b %s %s/%s" % (version, remote, version)
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else:
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(rc, out, err) = module.run_command("git checkout --force %s" % 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 = "git reset --hard %s/%s" % (remote, version)
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else:
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cmd = "git checkout --force %s" % version
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else:
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branch = get_head_branch(module, dest, remote)
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(rc, out, err) = module.run_command("git checkout --force %s" % 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 = "git reset --hard %s" % remote
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return module.run_command(cmd, check_rc=True)
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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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force=dict(default='yes', choices=['yes', 'no'], aliases=['force'])
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)
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)
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dest = 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.boolean(module.params['force'])
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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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(rc, out, err) = clone(module, repo, dest, remote)
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else:
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# else do a pull
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local_mods = has_local_mods(dest)
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before = get_version(dest)
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(rc, out, err) = reset(module,dest,force)
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if rc != 0:
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module.fail_json(msg=err)
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(rc, out, err) = fetch(module, repo, dest, version, remote)
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if rc != 0:
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module.fail_json(msg=err)
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# switch to version specified regardless of whether
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# we cloned or pulled
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(rc, out, err) = switch_version(module, dest, remote, version)
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# determine if we changed anything
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after = get_version(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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