def make_targets(self, out, cache):
for target, tasks in self.targets.items():
if len(tasks) == 1 and None in tasks:
relink(Path('../.caf/db')/'/'.join(tasks[None].path.parts[-4:]), out/target, relative=False)
else:
if not (out/target).is_dir():
mkdir(out/target)
for name, task in tasks.items():
relink(Path('../../.caf/db')/'/'.join(task.path.parts[-4:]), out/target/name, relative=False)
def init(caf):
"""
Initialize the Caf repository.
Usage:
caf init
By default create directory in .caf/db. If 'cache' is defined in
~/.config/caf/conf.yaml, the repository is created there and symlinked to
.caf/db, otherwise it is created locally.
"""
if 'cache' in caf.conf:
timestamp = get_timestamp()
cache_path = Path(caf.conf['cache'])/'{}_{}'.format(Path().resolve().name, timestamp)
mkdir(cache_path)
relink(cache_path, caf.cache, relative=False)
else:
cache_path = caf.cache
if cache_path.exists():
error('{} exists, cannot overwrite'.format(cache_path))
mkdir(cache_path)
info('Initializing an empty repository at {}.'.format(cache_path))
mkdir(caf.cellar)
mkdir(caf.brewery)
with open('.gitignore', 'w') as f:
f.write('\n'.join(['.caf']))
with open(os.devnull, 'w') as null:
sp.call(['git', 'init'], stdout=null)
sp.call(['git', 'add', 'caf', 'cscript.py', '.gitignore'], stdout=null)
sp.call(['git', 'commit', '-m', 'initial commit'], stdout=null)
def build(self, path):
"""Prepare, lock and store the task.
Check if not already locked. Touch (link in children, save chilren to
.caf/children). Check if needed children are already sealed. Check if
children are already locked. Prepare task. Get hashes. Lock task with
hashes. Check if a task has been already stored previously and if not,
store it and relink children.
"""
with timing('task init'):
if not path.is_dir():
mkdir(path)
self.path = Path(path).resolve()
if self.is_locked():
warn('{} already locked'.format(self))
return
if not self.is_touched():
self.touch()
for linkname, link in self.links.items():
if link.needed and not link.task.is_sealed():
warn('{}: dependency "{}" not sealed'.format(self, linkname))
return
if not all(child.is_locked() for child in self.children):
return
with timing('prepare'):
self.prepare()
with timing('hash'):
hashes = self.get_hashes()
with timing('lock'):
self.lock(hashes)
myhash = get_file_hash(self.path/'.caf/lock')
with timing('storing'):
cellarpath = self.ctx.cellar/str_to_path(myhash)
if cellarpath.is_dir():
env_file = Path(self.path/'.caf/env')
if env_file.is_file():
env_file.rename(cellarpath/'.caf/env')
shutil.rmtree(str(self.path))
else:
info('Stored new task {}'.format(self))
mkdir(cellarpath.parent, parents=True, exist_ok=True)
self.path.rename(cellarpath)
relink(cellarpath, self.path)
self.path = cellarpath
with timing('linking deps'):
self.link_deps()
def store_link_text(self, text, target, label=None):
h = hashlib.new(hashf)
h.update(text.encode())
texthash = h.hexdigest()
cellarpath = self.ctx.cellar/str_to_path(texthash)
if not cellarpath.is_file():
if label is True:
info('Stored new file "{}"'.format(target))
elif label:
info('Stored new text labeled "{}"'.format(label))
else:
info('Stored new text')
mkdir(cellarpath.parent, parents=True, exist_ok=True)
with cellarpath.open('w') as f:
f.write(text)
make_nonwritable(cellarpath)
with cd(self.path):
relink(os.path.relpath(str(cellarpath)), target)
self.files[target] = cellarpath
def build(caf, dry: '--dry', do_init: 'init'):
"""
Prepare tasks and targets defined in cscript.
Usage:
caf [init] build [--dry]
Options:
-n, --dry Dry run (do not write to disk).
Tasks are created in .caf/db/Brewery/Latest and if their preparation does
not depened on unfinished tasks, they are prepared and stored in
.caf/db/Cellar based on their SHA1 hash. Targets (collections of symlinks to
tasks) are created in ./build.
"""
if not hasattr(caf.cscript, 'build'):
error('cscript has to contain function build(ctx)')
if do_init:
init(['caf', 'init'], caf)
ctx = Context(caf.cache/cellar, caf.top, caf.libpath)
with timing('dependency tree'):
caf.cscript.build(ctx)
if not dry:
timestamp = get_timestamp()
mkdir(caf.brewery/timestamp)
relink(timestamp, caf.brewery/latest, relative=False)
with timing('build'):
ctx.build(caf.brewery/latest)
if caf.out.is_dir():
shutil.rmtree(str(caf.out))
mkdir(caf.out)
with timing('targets'):
ctx.make_targets(caf.out, caf.cache)
if hasattr(caf.cscript, 'json'):
warn('Make sure json is not printing dictionaries in features')
with open(os.devnull, 'w') as null:
sp.call(['git', 'add', '--all', 'build'], stdout=null)
sp.call(['git', 'commit', '-a', '-m', '#build'], stdout=null)
def store_link_file(self, source, target=None):
try:
text = source.getvalue()
except AttributeError:
pass
else:
assert target
self.store_link_text(text, target)
return
if not target:
target = source
if Path(source).is_dir():
(self.path/target).mkdir()
return
filehash = get_file_hash(Path(source))
cellarpath = self.ctx.cellar/str_to_path(filehash)
if not cellarpath.is_file():
info('Stored new file "{}"'.format(source))
mkdir(cellarpath.parent, parents=True, exist_ok=True)
shutil.copy(str(source), str(cellarpath))
make_nonwritable(cellarpath)
with cd(self.path):
relink(os.path.relpath(str(cellarpath)), target)
self.files[str(target)] = cellarpath
def touch(self):
mkdir(self.path/'.caf')
with (self.path/'.caf/children').open('w') as f:
json.dump(list(self.links), f, sort_keys=True)
self.link_deps()