def validate_datalad_config(store, dataset):
"""Add a .datalad/config file if one does not exist."""
dataset_path = store.get_dataset_path(dataset)
try:
git_show(dataset_path, 'HEAD', '.datalad/config')
except KeyError:
create_datalad_config(dataset_path)
commit_files(store, dataset, ['.datalad/config'])
def on_get(self, req, resp, dataset, filename=None, snapshot='HEAD'):
ds_path = self.store.get_dataset_path(dataset)
if filename:
try:
ds = self.store.get_dataset(dataset)
if ds.repo.is_under_annex([filename])[0]:
path = git_show(ds_path, snapshot + ':' + filename)
# remove leading relative folder paths
fd = path[path.find('.git/annex'):]
# if fd fails, that means the file is not present in the annex and we need to get it from s3
# so we send the client a 404 to indicate the file was not found locally.
fd = open(os.path.join(ds_path, fd), 'rb')
resp.stream = fd
resp.stream_len = os.fstat(fd.fileno()).st_size
resp.status = falcon.HTTP_OK
else:
resp.body = git_show(ds_path, snapshot + ':' + filename)
resp.status = falcon.HTTP_OK
except CalledProcessError:
# File is not present in tree
resp.media = {'error': 'file not found in git tree'}
resp.status = falcon.HTTP_NOT_FOUND
except IOError:
# File is not kept locally
resp.media = {'error': 'file not found'}
resp.status = falcon.HTTP_NOT_FOUND
except:
# Some unknown error
resp.media = {
'error': 'an unknown error occurred accessing this file'
}
resp.status = falcon.HTTP_INTERNAL_SERVER_ERROR
self.logger.exception(
'An unknown error processing file "{}"'.format(filename))
else:
# Request for index of files
# Return a list of file objects
# {name, path, size}
try:
if "untracked" in req.params:
files = get_untracked_files(self.store, dataset)
resp.media = {'files': files}
else:
files = get_files(self.store, dataset, snapshot)
resp.media = {'files': files}
except:
resp.status = falcon.HTTP_INTERNAL_SERVER_ERROR
def update_description(store,
dataset,
description_fields,
name=None,
email=None):
ds = store.get_dataset(dataset)
description = git_show(ds.path, 'HEAD:dataset_description.json')
description_json = json.loads(description)
if description_json.get('License') != 'CC0':
description_fields = edit_description(description_fields,
{'License': 'CC0'})
if description_fields is not None and any(description_fields):
updated = edit_description(description_json, description_fields)
path = os.path.join(store.get_dataset_path(dataset),
'dataset_description.json')
with open(path, 'r+', encoding='utf-8') as description_file:
description_file_contents = description_file.read()
if description != description_file_contents:
raise Exception('unexpected dataset_description.json contents')
description_file.seek(0)
description_file.truncate(0)
description_file.write(json.dumps(updated, indent=4))
# Commit new content, run validator
commit_files(store, dataset, ['dataset_description.json'])
return updated
else:
return description_json
def check_remote_has_version(dataset_path, remote, tag):
try:
info = get_tag_info(dataset_path, tag)
remotes = info.get('repositories containing these files', [])
remote_repo = [
r for r in remotes if r.get('description') == f'[{remote}]'
]
remote_id_A = remote_repo and remote_repo[0].get('uuid')
# extract remote uuid and associated git tree id from `git show git-annex:export.log`
# this command only logs the latest export. previously exported tags will not show
export_log = git_show(dataset_path, 'git-annex', 'export.log')
log_remote_id_pattern = re.compile(':(.+) .+$')
match = log_remote_id_pattern.search(export_log)
remote_id_B = match.group(1)
log_tree_id_pattern = re.compile('.* (.+)$')
match = log_tree_id_pattern.search(export_log)
tree_id_A = match.group(1)
# extract git tree id of <tag> from git reference
repo = pygit2.Repository(dataset_path)
tree_id_B = git_tag_tree(repo, tag)
except AttributeError:
return False
# if the remote uuids and tree ids exist and match, then
# <tag> is the latest export to <remote>
return remote_id_A == remote_id_B and tree_id_A == tree_id_B
def test_write_new_changes(datalad_store, new_dataset):
ds_id = os.path.basename(new_dataset.path)
write_new_changes(new_dataset, '1.0.1', ['Some changes'], '2019-01-01')
# Manually make the commit without validation
new_dataset.save('CHANGES')
# Get a fresh dataset object and verify correct CHANGES
dataset = Dataset(os.path.join(datalad_store.annex_path, ds_id))
assert not dataset.repo.dirty
assert git_show(dataset.path, 'HEAD:CHANGES') == '''1.0.1 2019-01-01
def on_get(self, req, resp, dataset, filename=None, snapshot='HEAD'):
ds_path = self.store.get_dataset_path(dataset)
if filename:
try:
file_content = git_show(ds_path, snapshot, filename)
# If the file begins with an annex path, return that path
if file_content[0:4096].find('.git/annex') != -1:
# Resolve absolute path for annex target
target_path = os.path.join(ds_path,
os.path.dirname(filename),
file_content)
# Verify the annex path is within the dataset dir
if ds_path == os.path.commonpath((ds_path, target_path)):
fd = open(target_path, 'rb')
resp.stream = fd
resp.stream_len = os.fstat(fd.fileno()).st_size
resp.status = falcon.HTTP_OK
else:
resp.media = {'error': 'file not found in git tree'}
resp.status = falcon.HTTP_NOT_FOUND
else:
resp.body = file_content
resp.status = falcon.HTTP_OK
except KeyError:
# File is not present in tree
resp.media = {'error': 'file not found in git tree'}
resp.status = falcon.HTTP_NOT_FOUND
except IOError:
# File is not kept locally
resp.media = {'error': 'file not found'}
resp.status = falcon.HTTP_NOT_FOUND
except:
# Some unknown error
resp.media = {
'error': 'an unknown error occurred accessing this file'
}
resp.status = falcon.HTTP_INTERNAL_SERVER_ERROR
self.logger.exception(
'An unknown error processing file "{}"'.format(filename))
else:
# Request for index of files
# Return a list of file objects
# {name, path, size}
try:
files = get_files(self.store, dataset, snapshot)
resp.media = {'files': files}
except:
resp.status = falcon.HTTP_INTERNAL_SERVER_ERROR
def test_git_show(new_dataset):
assert git.git_show(new_dataset.path, 'HEAD',
'dataset_description.json') == '{"BIDSVersion": "1.0.2", "License": "This is not a real dataset", "Name": "Test fixture new dataset"}'
def get_head_changes(dataset_path):
try:
return git_show(dataset_path, 'HEAD', 'CHANGES')
except KeyError:
return None
def get_head_changes(ds):
try:
return git_show(ds.path, 'HEAD:CHANGES')
except CalledProcessError:
return None
