PTU5KAS/kas/repos.py
Andreas Reichel 7b18e5ec3b Refactor repo checkout
If a kas-file inside a repo includes another kas-file form a repo
which is not checked-out, and this 2nd repo can only be checked-out
with an SSH-key, kas fails. This is, because the constructor of
the Config class used to fetch missing repos already before the
SSH-Agent was setup.

This patch refactors the way in which kas checks-out repositories. This
also required the Config class to be split into Context and Config,
where the new Context is the build-Context, i.e. containing the
environment of commands executed by kas and the new Config is the Config
of kas itself, i.e. containing the repo dictionary.

This way it is possible to initialize the context needed for SSH setup
independently of the kas configuration.

The commands ReposFetch and ReposCheckout are refactored into a
SetupRepos command. This command parses the include files and
successively checks-out needed repos and updates the config as long
as repos are missing. The logic is taken directly from the constructor
of the former Config class (with minor adaptations).

Further refactoring will be needed to clean up the conceptual
programming patterns (i.e. to keep the Macro-Style consistent),
and to re-add the macro pattern regarding the above ReposFetch.

Signed-off-by: Andreas Reichel <andreas.reichel.ext@siemens.com>
2018-08-23 16:29:56 +02:00

343 lines
12 KiB
Python

# kas - setup tool for bitbake based projects
#
# Copyright (c) Siemens AG, 2017
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
"""
This module contains the Repo class.
"""
import os
import asyncio
import logging
from urllib.parse import urlparse
from .libkas import run_cmd_async, run_cmd
__license__ = 'MIT'
__copyright__ = 'Copyright (c) Siemens AG, 2017'
class Repo:
"""
Represents a repository in the kas configuration.
"""
def __init__(self, url, path, refspec, layers, patches,
disable_operations):
# pylint: disable=too-many-arguments
self.url = url
self.path = path
self.refspec = refspec
self._layers = layers
self._patches = patches
self.name = os.path.basename(self.path)
self.operations_disabled = disable_operations
def __getattr__(self, item):
# pylint: disable=no-else-return
if item == 'layers':
if not self._layers:
return [self.path]
return [self.path + '/' + l for l in self._layers]
elif item == 'qualified_name':
url = urlparse(self.url)
return ('{url.netloc}{url.path}'
.format(url=url)
.replace('@', '.')
.replace(':', '.')
.replace('/', '.')
.replace('*', '.'))
# Default behaviour
raise AttributeError
def __str__(self):
return '%s:%s %s %s' % (self.url, self.refspec,
self.path, self._layers)
@staticmethod
def factory(name, repo_config, config):
"""
Return an instance Repo depending on params.
"""
ctx = config.context
layers_dict = repo_config.get('layers', {})
layers = list(filter(lambda x, laydict=layers_dict:
str(laydict[x]).lower() not in
['disabled', 'excluded', 'n', 'no', '0', 'false'],
layers_dict))
patches_dict = repo_config.get('patches', {})
patches = list(
{
'id': p,
'repo': patches_dict[p]['repo'],
'path': patches_dict[p]['path'],
}
for p in sorted(patches_dict)
if patches_dict[p])
url = repo_config.get('url', None)
name = repo_config.get('name', name)
typ = repo_config.get('type', 'git')
refspec = repo_config.get('refspec', None)
path = repo_config.get('path', None)
disable_operations = False
if url is None:
# No version control operation on repository
if path is None:
path = Repo.get_root_path(os.path.dirname(config.filename),
config.context.environ)
logging.info('Using %s as root for repository %s', path,
name)
url = path
disable_operations = True
else:
if path is None:
path = os.path.join(ctx.kas_work_dir, name)
else:
if not os.path.isabs(path):
# Relative pathes are assumed to start from work_dir
path = os.path.join(ctx.kas_work_dir, path)
if typ == 'git':
return GitRepo(url, path, refspec, layers, patches,
disable_operations)
if typ == 'hg':
return MercurialRepo(url, path, refspec, layers, patches,
disable_operations)
raise NotImplementedError('Repo typ "%s" not supported.' % typ)
@staticmethod
def get_root_path(path, environ):
"""
Check if path is a version control repo and return its root path.
"""
(ret, output) = run_cmd(['git', 'rev-parse', '--show-toplevel'],
cwd=path, env=environ, fail=False,
liveupdate=False)
if ret == 0:
return output.strip()
(ret, output) = run_cmd(['hg', 'root'],
cwd=path, env=environ, fail=False,
liveupdate=False)
if ret == 0:
return output.strip()
return path
class RepoImpl(Repo):
"""
Provides a generic implementation for a Repo.
"""
@asyncio.coroutine
def fetch_async(self, ctx):
"""
Start asynchronous repository fetch.
"""
if self.operations_disabled:
return 0
if not os.path.exists(self.path):
os.makedirs(os.path.dirname(self.path), exist_ok=True)
sdir = os.path.join(ctx.kas_repo_ref_dir or '',
self.qualified_name)
logging.debug('Looking for repo ref dir in %s', sdir)
(retc, _) = yield from run_cmd_async(self.clone_cmd(sdir, ctx),
env=ctx.environ,
cwd=ctx.kas_work_dir)
if retc == 0:
logging.info('Repository %s cloned', self.name)
return retc
# take what came out of clone and stick to that forever
if self.refspec is None:
return 0
# Does refspec exist in the current repository?
(retc, output) = yield from run_cmd_async(self.contains_refspec_cmd(),
env=ctx.environ,
cwd=self.path,
fail=False,
liveupdate=False)
if retc == 0:
logging.info('Repository %s already contains %s as %s',
self.name, self.refspec, output.strip())
return retc
# No it is missing, try to fetch
(retc, output) = yield from run_cmd_async(self.fetch_cmd(),
env=ctx.environ,
cwd=self.path,
fail=False)
if retc:
logging.warning('Could not update repository %s: %s',
self.name, output)
else:
logging.info('Repository %s updated', self.name)
return 0
def checkout(self, ctx):
"""
Checks out the correct revision of the repo.
"""
if self.operations_disabled or self.refspec is None:
return
# Check if repos is dirty
(_, output) = run_cmd(self.is_dirty_cmd(),
env=ctx.environ, cwd=self.path,
fail=False)
if output:
logging.warning('Repo %s is dirty. no checkout', self.name)
return
# Check if current HEAD is what in the config file is defined.
(_, output) = run_cmd(self.current_rev_cmd(),
env=ctx.environ, cwd=self.path)
if output.strip() == self.refspec:
logging.info('Repo %s has already checkout out correct '
'refspec. nothing to do', self.name)
return
run_cmd(self.checkout_cmd(), cwd=self.path)
@asyncio.coroutine
def apply_patches_async(self, ctx):
"""
Applies patches to repository asynchronously.
"""
if self.operations_disabled:
return 0
for patch in self._patches:
other_repo = ctx.config.repo_dict.get(patch['repo'], None)
if not other_repo:
logging.warning('Could not find referenced repo. '
'(missing repo: %s, repo: %s, '
'patch entry: %s)',
patch['repo'],
self.name,
patch['id'])
continue
path = os.path.join(other_repo.path, patch['path'])
cmd = []
if os.path.isfile(path):
cmd = self.apply_patches_file_cmd(path)
elif os.path.isdir(path):
cmd = self.apply_patches_quilt_cmd(path)
else:
logging.warning('Could not find patch. '
'(patch path: %s, repo: %s, patch entry: %s)',
path,
self.name,
patch['id'])
continue
(retc, output) = yield from run_cmd_async(cmd,
env=ctx.environ,
cwd=self.path,
fail=False)
# pylint: disable=no-else-return
if retc:
logging.error('Could not apply patch. Please fix repos and '
'patches. (patch path: %s, repo: %s, patch '
'entry: %s, vcs output: %s)',
path, self.name, patch['id'], output)
return 1
else:
logging.info('Patch applied. '
'(patch path: %s, repo: %s, patch entry: %s)',
path, self.name, patch['id'])
return 0
class GitRepo(RepoImpl):
"""
Provides the git implementations for a Repo.
"""
# pylint: disable=no-self-use,missing-docstring
def clone_cmd(self, gitsrcdir, ctx):
cmd = ['git', 'clone', '-q', self.url, self.path]
if ctx.kas_repo_ref_dir and os.path.exists(gitsrcdir):
cmd.extend(['--reference', gitsrcdir])
return cmd
def contains_refspec_cmd(self):
return ['git', 'cat-file', '-t', self.refspec]
def fetch_cmd(self):
return ['git', 'fetch', '--all']
def is_dirty_cmd(self):
return ['git', 'diff-index', 'HEAD', '--shortstat']
def current_rev_cmd(self):
return ['git', 'rev-parse', '--verify', 'HEAD']
def checkout_cmd(self):
return ['git', 'checkout', '-q',
'{refspec}'.format(refspec=self.refspec)]
def apply_patches_file_cmd(self, path):
return ['git', 'am', '-q', path]
def apply_patches_quilt_cmd(self, path):
return ['git', 'quiltimport', '--author', 'kas <kas@example.com>',
'--patches', path]
class MercurialRepo(RepoImpl):
"""
Provides the hg implementations for a Repo.
"""
# pylint: disable=no-self-use,missing-docstring,unused-argument
def clone_cmd(self, gitsrcdir, config):
return ['hg', 'clone', self.url, self.path]
def contains_refspec_cmd(self):
return ['hg', 'log', '-r', self.refspec]
def fetch_cmd(self):
return ['hg', 'pull']
def is_dirty_cmd(self):
return ['hg', 'diff']
def current_rev_cmd(self):
return ['hg', 'identify', '-i', '--debug']
def checkout_cmd(self):
return ['hg', 'checkout', '{refspec}'.format(refspec=self.refspec)]
def apply_patches_file_cmd(self, path):
raise NotImplementedError()
def apply_patches_quilt_cmd(self, path):
raise NotImplementedError()