def ensure_keys(name, config, *keys):
values = []
for required_key in keys:
if required_key not in config:
raise OzyError(f"Missing required key '{required_key}' in '{name}'")
values.append(config[required_key])
return values
def install(apps):
"""Ensures the named applications are installed at their current prevailing versions."""
config = load_config()
for app_name in apps:
if app_name not in config['apps']:
raise OzyError(f"App '{app_name}' was not found")
app = App(app_name, config)
app.ensure_installed()
def download_to_file_obj(dest_file_obj: BinaryIO, url: str):
response = requests.get(url, stream=True)
if not response.ok:
raise OzyError(f"Unable to fetch url '{url}' - {response}")
total_size = int(response.headers.get('content-length', 0))
with tqdm(total=total_size, unit='iB', unit_scale=True) as t:
for data in response.iter_content(_DOWNLOAD_CHUNK_SIZE):
t.update(len(data))
dest_file_obj.write(data)
def resolve(config, templates):
if 'template' in config:
template_name = config['template']
if template_name not in templates:
raise OzyError(f"Unable to find template '{template_name}'")
# TODO had these the wrong way round to start with. make a test
config = ChainMap(config,
templates[template_name])
return {key: safe_expand(config, value) for key, value in config.items()}
def _run(app, arguments, version=None):
tool = find_app(app, version)
if not tool:
raise OzyError(f"Unable to find ozy-controlled app '{app}'")
tool.ensure_installed()
try:
os.execv(tool.executable, [tool.executable] + list(arguments))
except Exception as e:
_LOGGER.error("Unable to execute %s: %s", tool.executable, e)
raise
def __init__(self, name, config, *required_keys, **default_keys):
self._name = name
self._config = default_keys.copy()
for required_key in required_keys:
if required_key not in config:
raise OzyError(
f"Missing required key '{required_key}' in '{name}'")
self._config[required_key] = config[required_key]
for optional_key in default_keys.keys():
if optional_key in config:
self._config[optional_key] = config[optional_key]
def __init__(self, name, root_config):
self._name = name
self._root_config = root_config
self._config = resolve(root_config['apps'][name], self._root_config.get('templates', {}))
self._executable_path = self._config.get('executable_path', self.name)
self._relocatable = self._config.get('relocatable', True)
self._post_install = fixup_post_install(self._config.get('post_install', []))
self._version, install_type = ensure_keys(name, self._config, 'version', 'type')
if install_type not in SUPPORTED_INSTALLERS:
raise OzyError(f"Unsupported installation type '{install_type}'")
self._installer = SUPPORTED_INSTALLERS[install_type](name, self._config)
def safe_expand(format_params, to_expand):
if isinstance(to_expand, list):
return [safe_expand(format_params, x) for x in to_expand]
elif not isinstance(to_expand, str):
return to_expand
params = get_system_variables()
params.update(format_params)
try:
return to_expand.format(**params)
except KeyError as ke:
raise OzyError(f"Could not find key {ke} in expansion '{to_expand}' with params '{format_params}'")
def _run(app, arguments, version=None):
tool = find_app(app, version)
if not tool:
raise OzyError(f"Unable to find ozy-controlled app '{app}'")
tool.ensure_installed()
try:
# The child process shouldn't get any of our overridden variables; put the original ones back.
environment = restore_overridden_env_vars(os.environ)
os.execve(tool.executable, [tool.executable] + list(arguments),
environment)
except Exception as e:
_LOGGER.error("Unable to execute %s: %s", tool.executable, e)
raise
def __init__(self, name: str, config: dict, *required_keys,
**default_keys):
self._name = name
self._config = default_keys.copy()
self._executable_path = config.get('executable_path', name)
for required_key in required_keys:
if required_key not in config:
raise OzyError(
f"Missing required key '{required_key}' in '{name}'")
self._config[required_key] = config[required_key]
for optional_key in default_keys.keys():
if optional_key in config:
self._config[optional_key] = config[optional_key]
def install(self, to_dir):
app_name = self.config('app_name')
url = self.config('url')
os.makedirs(to_dir)
app_path = os.path.join(to_dir, app_name)
with NamedTemporaryFile() as temp_file:
download_to_file_obj(temp_file, url)
temp_file.flush()
zf = ZipFile(temp_file.name)
contents = zf.namelist()
if len(contents) != 1:
raise OzyError(
f"More than one file in the zipfile at {url}! ({contents})"
)
with open(app_path, 'wb') as out_file:
with zf.open(contents[0]) as in_file:
out_file.write(in_file.read())
os.chmod(app_path, 0o774)
def update(dry_run, url):
"""Update base configuration from the remote URL."""
user_conf = load_ozy_user_conf()
if not url:
if 'url' not in user_conf:
raise OzyError('Missing url in configuration')
url = user_conf['url']
ozy_conf_filename = f"{get_ozy_dir()}/ozy.yaml"
tmp_filename = ozy_conf_filename + ".tmp"
download_to(tmp_filename, url)
new_conf_root = parse_ozy_conf(tmp_filename)
old_conf_root = parse_ozy_conf(ozy_conf_filename)
changed = False
for app, new_conf in new_conf_root['apps'].items():
old_conf = old_conf_root['apps'].get(app, None)
if not old_conf:
_LOGGER.info('%s new app %s (%s)',
"Would install" if dry_run else "Installing", app,
new_conf['version'])
changed = True
elif old_conf['version'] != new_conf['version']:
_LOGGER.info('%s %s from %s to %s',
"Would upgrade" if dry_run else "Upgrading", app,
old_conf['version'], new_conf['version'])
changed = True
if not dry_run:
ozy_bin_dir = get_ozy_bin_dir()
user_conf['url'] = url
save_ozy_user_conf(user_conf)
os.rename(tmp_filename, ozy_conf_filename)
symlink_binaries(ozy_bin_dir, new_conf_root)
if not changed:
_LOGGER.info("No changes made")
else:
if changed:
_LOGGER.info("Dry run only - no changes made")
else:
_LOGGER.info(
"Dry run only - no changes would be made, even without --dry-run"
)
os.unlink(tmp_filename)
def get_home_dir() -> str:
if 'HOME' in os.environ:
return os.environ['HOME']
raise OzyError("HOME env variable not found")
