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import subprocess
import pytest
from buildstream import _yaml
from .. import Repo
from .site import HAVE_GIT, GIT, GIT_ENV
# generate_junction()
#
# Generates a junction element with a git repository
#
# Args:
# tmpdir: The tmpdir fixture, for storing the generated git repo
# subproject_path: The path for the subproject, to add to the git repo
# junction_path: The location to store the generated junction element
# store_ref: Whether to store the ref in the junction.bst file
#
# Returns:
# (str): The ref
#
def generate_junction(tmpdir, subproject_path, junction_path, *, store_ref=True):
# Create a repo to hold the subproject and generate
# a junction element for it
#
repo = _SimpleGit(str(tmpdir))
source_ref = ref = repo.create(subproject_path)
if not store_ref:
source_ref = None
element = {
'kind': 'junction',
'sources': [
repo.source_config(ref=source_ref)
]
}
_yaml.dump(element, junction_path)
return ref
# A barebones Git Repo class to use for generating junctions
class _SimpleGit(Repo):
def __init__(self, directory, subdir='repo'):
if not HAVE_GIT:
pytest.skip('git is not available')
super().__init__(directory, subdir)
def create(self, directory):
self.copy_directory(directory, self.repo)
self._run_git('init', '.')
self._run_git('add', '.')
self._run_git('commit', '-m', 'Initial commit')
return self.latest_commit()
def latest_commit(self):
return self._run_git(
'rev-parse', 'HEAD',
stdout=subprocess.PIPE,
universal_newlines=True,
).stdout.strip()
def source_config(self, ref=None, checkout_submodules=None):
config = {
'kind': 'git',
'url': 'file://' + self.repo,
'track': 'master'
}
if ref is not None:
config['ref'] = ref
if checkout_submodules is not None:
config['checkout-submodules'] = checkout_submodules
return config
def _run_git(self, *args, **kwargs):
argv = [GIT]
argv.extend(args)
if 'env' not in kwargs:
kwargs['env'] = dict(GIT_ENV, PWD=self.repo)
kwargs.setdefault('cwd', self.repo)
kwargs.setdefault('check', True)
return subprocess.run(argv, **kwargs)
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