590 lines
22 KiB
Python
590 lines
22 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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accept_hostkey:
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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: "1.5"
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description:
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- if C(yes), adds the hostkey for the repo url if not already
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added. If ssh_args contains "-o StrictHostKeyChecking=no",
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this parameter is ignored.
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ssh_opts:
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required: false
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default: None
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version_added: "1.5"
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description:
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- Creates a wrapper script and exports the path as GIT_SSH
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which git then automatically uses to override ssh arguments.
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An example value could be "-o StrictHostKeyChecking=no"
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key_file:
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requird: false
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default: None
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version_added: "1.5"
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description:
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- Uses the same wrapper method as ssh_opts to pass
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"-i <key_file>" to the ssh arguments used by git
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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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recursive:
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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: "1.6"
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description:
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- if C(no), repository will be cloned without the --recursive
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option, skipping sub-modules.
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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 -H 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_submodule_update_params(module, git_path, cwd):
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#or: git submodule [--quiet] update [--init] [-N|--no-fetch]
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#[-f|--force] [--rebase] [--reference <repository>] [--merge]
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#[--recursive] [--] [<path>...]
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params = []
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# run a bad submodule command to get valid params
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cmd = "%s submodule update --help" % (git_path)
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rc, stdout, stderr = module.run_command(cmd, cwd=cwd)
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lines = stderr.split('\n')
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update_line = None
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for line in lines:
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if 'git submodule [--quiet] update ' in line:
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update_line = line
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if update_line:
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update_line = update_line.replace('[','')
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update_line = update_line.replace(']','')
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update_line = update_line.replace('|',' ')
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parts = shlex.split(update_line)
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for part in parts:
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if part.startswith('--'):
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part = part.replace('--', '')
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params.append(part)
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return params
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def write_ssh_wrapper():
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module_dir = get_module_path()
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fd, wrapper_path = tempfile.mkstemp(prefix=module_dir + '/')
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fh = os.fdopen(fd, 'w+b')
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template = """#!/bin/sh
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if [ -z "$GIT_SSH_OPTS" ]; then
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BASEOPTS=""
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else
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BASEOPTS=$GIT_SSH_OPTS
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fi
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if [ -z "$GIT_KEY" ]; then
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ssh $BASEOPTS "$@"
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else
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ssh -i "$GIT_KEY" $BASEOPTS "$@"
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fi
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"""
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fh.write(template)
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fh.close()
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st = os.stat(wrapper_path)
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os.chmod(wrapper_path, st.st_mode | stat.S_IEXEC)
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return wrapper_path
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def set_git_ssh(ssh_wrapper, key_file, ssh_opts):
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if os.environ.get("GIT_SSH"):
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del os.environ["GIT_SSH"]
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os.environ["GIT_SSH"] = ssh_wrapper
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if os.environ.get("GIT_KEY"):
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del os.environ["GIT_KEY"]
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if key_file:
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os.environ["GIT_KEY"] = key_file
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if os.environ.get("GIT_SSH_OPTS"):
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del os.environ["GIT_SSH_OPTS"]
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if ssh_opts:
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os.environ["GIT_SSH_OPTS"] = ssh_opts
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def get_version(module, git_path, dest, ref="HEAD"):
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''' samples the version of the git repo '''
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cmd = "%s rev-parse %s" % (git_path, ref)
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rc, stdout, stderr = module.run_command(cmd, cwd=dest)
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sha = stdout.rstrip('\n')
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return sha
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def clone(git_path, module, repo, dest, remote, depth, version, bare,
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reference, recursive):
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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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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 ])
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if recursive:
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cmd.extend([ '--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, cwd=dest_dirname)
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if bare:
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if remote != 'origin':
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module.run_command([git_path, 'remote', 'add', remote, repo], check_rc=True, cwd=dest)
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def has_local_mods(module, git_path, dest, bare):
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if bare:
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return False
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cmd = "%s status -s" % (git_path)
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rc, stdout, stderr = module.run_command(cmd, cwd=dest)
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lines = stdout.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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cmd = "%s reset --hard HEAD" % (git_path,)
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return module.run_command(cmd, check_rc=True, cwd=dest)
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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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cwd = None
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if remote == module.params['repo']:
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cloning = True
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else:
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cwd = 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, cwd=cwd)
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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, cwd=dest)
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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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branches = []
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cmd = '%s branch -a' % (git_path,)
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(rc, out, err) = module.run_command(cmd, cwd=dest)
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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 get_tags(git_path, module, dest):
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tags = []
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cmd = '%s tag' % (git_path,)
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(rc, out, err) = module.run_command(cmd, cwd=dest)
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if rc != 0:
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module.fail_json(msg="Could not determine tag data - received %s" % out)
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for line in out.split('\n'):
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tags.append(line.strip())
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return tags
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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, cwd=dest)
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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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(rc, out0, err0) = module.run_command([git_path, 'remote', 'set-url', remote, repo], cwd=dest)
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if rc != 0:
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module.fail_json(msg="Failed to set a new url %s for %s: %s" % (repo, remote, out0 + err0))
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if bare:
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(rc, out1, err1) = module.run_command([git_path, 'fetch', remote, '+refs/heads/*:refs/heads/*'], cwd=dest)
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else:
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(rc, out1, err1) = module.run_command("%s fetch %s" % (git_path, remote), cwd=dest)
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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/*'], cwd=dest)
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else:
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(rc, out2, err2) = module.run_command("%s fetch --tags %s" % (git_path, remote), cwd=dest)
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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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# get the valid submodule params
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params = get_submodule_update_params(module, git_path, 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, cwd=dest)
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if 'remote' in params:
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cmd = [ git_path, 'submodule', 'update', '--init', '--recursive' ,'--remote' ]
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else:
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cmd = [ git_path, 'submodule', 'update', '--init', '--recursive' ]
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(rc, out, err) = module.run_command(cmd, cwd=dest)
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if rc != 0:
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module.fail_json(msg="Failed to init/update submodules: %s" % out + err)
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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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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), cwd=dest)
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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), cwd=dest)
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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, cwd=dest)
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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(
|
|
dest=dict(required=True),
|
|
repo=dict(required=True, aliases=['name']),
|
|
version=dict(default='HEAD'),
|
|
remote=dict(default='origin'),
|
|
reference=dict(default=None),
|
|
force=dict(default='yes', type='bool'),
|
|
depth=dict(default=None, type='int'),
|
|
update=dict(default='yes', type='bool'),
|
|
accept_hostkey=dict(default='no', type='bool'),
|
|
key_file=dict(default=None, required=False),
|
|
ssh_opts=dict(default=None, required=False),
|
|
executable=dict(default=None),
|
|
bare=dict(default='no', type='bool'),
|
|
recursive=dict(default='yes', type='bool'),
|
|
),
|
|
supports_check_mode=True
|
|
)
|
|
|
|
dest = os.path.abspath(os.path.expanduser(module.params['dest']))
|
|
repo = module.params['repo']
|
|
version = module.params['version']
|
|
remote = module.params['remote']
|
|
force = module.params['force']
|
|
depth = module.params['depth']
|
|
update = module.params['update']
|
|
bare = module.params['bare']
|
|
reference = module.params['reference']
|
|
git_path = module.params['executable'] or module.get_bin_path('git', True)
|
|
|
|
key_file = module.params['key_file']
|
|
ssh_opts = module.params['ssh_opts']
|
|
|
|
# create a wrapper script and export
|
|
# GIT_SSH=<path> as an environment variable
|
|
# for git to use the wrapper script
|
|
ssh_wrapper = None
|
|
if key_file or ssh_opts:
|
|
ssh_wrapper = write_ssh_wrapper()
|
|
set_git_ssh(ssh_wrapper, key_file, ssh_opts)
|
|
|
|
# add the git repo's hostkey
|
|
if module.params['ssh_opts'] is not None:
|
|
if not "-o StrictHostKeyChecking=no" in module.params['ssh_opts']:
|
|
add_git_host_key(module, repo, accept_hostkey=module.params['accept_hostkey'])
|
|
else:
|
|
add_git_host_key(module, repo, accept_hostkey=module.params['accept_hostkey'])
|
|
|
|
recursive = module.params['recursive']
|
|
|
|
if bare:
|
|
gitconfig = os.path.join(dest, 'config')
|
|
else:
|
|
gitconfig = os.path.join(dest, '.git', 'config')
|
|
|
|
rc, out, err, status = (0, None, None, None)
|
|
|
|
# if there is no git configuration, do a clone operation
|
|
# else pull and switch the version
|
|
before = None
|
|
local_mods = False
|
|
if not os.path.exists(gitconfig):
|
|
if module.check_mode:
|
|
remote_head = get_remote_head(git_path, module, dest, version, repo, bare)
|
|
module.exit_json(changed=True, before=before, after=remote_head)
|
|
clone(git_path, module, repo, dest, remote, depth, version, bare,
|
|
reference, recursive)
|
|
elif not update:
|
|
# Just return having found a repo already in the dest path
|
|
# this does no checking that the repo is the actual repo
|
|
# requested.
|
|
before = get_version(module, git_path, dest)
|
|
module.exit_json(changed=False, before=before, after=before)
|
|
else:
|
|
# else do a pull
|
|
local_mods = has_local_mods(module, git_path, dest, bare)
|
|
before = get_version(module, git_path, dest)
|
|
if local_mods:
|
|
# failure should happen regardless of check mode
|
|
if not force:
|
|
module.fail_json(msg="Local modifications exist in repository (force=no).")
|
|
# if force and in non-check mode, do a reset
|
|
if not module.check_mode:
|
|
reset(git_path, module, dest)
|
|
# exit if already at desired sha version
|
|
remote_head = get_remote_head(git_path, module, dest, version, remote, bare)
|
|
if before == remote_head:
|
|
if local_mods:
|
|
module.exit_json(changed=True, before=before, after=remote_head,
|
|
msg="Local modifications exist")
|
|
elif is_remote_tag(git_path, module, dest, repo, version):
|
|
# if the remote is a tag and we have the tag locally, exit early
|
|
if version in get_tags(git_path, module, dest):
|
|
module.exit_json(changed=False, before=before, after=remote_head)
|
|
else:
|
|
module.exit_json(changed=False, before=before, after=remote_head)
|
|
if module.check_mode:
|
|
module.exit_json(changed=True, before=before, after=remote_head)
|
|
fetch(git_path, module, repo, dest, version, remote, bare)
|
|
|
|
# switch to version specified regardless of whether
|
|
# we cloned or pulled
|
|
if not bare:
|
|
switch_version(git_path, module, dest, remote, version)
|
|
|
|
# determine if we changed anything
|
|
after = get_version(module, git_path, dest)
|
|
changed = False
|
|
|
|
if before != after or local_mods:
|
|
changed = True
|
|
|
|
# cleanup the wrapper script
|
|
if ssh_wrapper:
|
|
os.remove(ssh_wrapper)
|
|
|
|
module.exit_json(changed=changed, before=before, after=after)
|
|
|
|
# import module snippets
|
|
from ansible.module_utils.basic import *
|
|
from ansible.module_utils.known_hosts import *
|
|
|
|
main()
|