stack-orchestrator/stack_orchestrator/util.py

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# Copyright © 2022, 2023 Vulcanize
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# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http:#www.gnu.org/licenses/>.
from decouple import config
import os.path
import sys
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import ruamel.yaml
from pathlib import Path
from dotenv import dotenv_values
from typing import Mapping, Set, List
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def include_exclude_check(s, include, exclude):
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if include is None and exclude is None:
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return True
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if include is not None:
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include_list = include.split(",")
return s in include_list
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if exclude is not None:
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exclude_list = exclude.split(",")
return s not in exclude_list
def get_stack_file_path(stack):
# In order to be compatible with Python 3.8 we need to use this hack to get the path:
# See: https://stackoverflow.com/questions/25389095/python-get-path-of-root-project-structure
stack_file_path = Path(__file__).absolute().parent.joinpath("data", "stacks", stack, "stack.yml")
return stack_file_path
def get_dev_root_path(ctx):
if ctx and ctx.local_stack:
# TODO: This code probably doesn't work
dev_root_path = os.getcwd()[0:os.getcwd().rindex("stack-orchestrator")]
print(f'Local stack dev_root_path (CERC_REPO_BASE_DIR) overridden to: {dev_root_path}')
else:
dev_root_path = os.path.expanduser(config("CERC_REPO_BASE_DIR", default="~/cerc"))
return dev_root_path
# Caller can pass either the name of a stack, or a path to a stack file
def get_parsed_stack_config(stack):
stack_file_path = stack if isinstance(stack, os.PathLike) else get_stack_file_path(stack)
try:
with stack_file_path:
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stack_config = get_yaml().load(open(stack_file_path, "r"))
return stack_config
except FileNotFoundError as error:
# We try here to generate a useful diagnostic error
# First check if the stack directory is present
stack_directory = stack_file_path.parent
if os.path.exists(stack_directory):
print(f"Error: stack.yml file is missing from stack: {stack}")
else:
print(f"Error: stack: {stack} does not exist")
print(f"Exiting, error: {error}")
sys.exit(1)
def get_pod_list(parsed_stack):
# Handle both old and new format
pods = parsed_stack["pods"]
if type(pods[0]) is str:
result = pods
else:
result = []
for pod in pods:
result.append(pod["name"])
return result
def get_plugin_code_paths(stack) -> List[Path]:
parsed_stack = get_parsed_stack_config(stack)
pods = parsed_stack["pods"]
result: Set[Path] = set()
for pod in pods:
if type(pod) is str:
result.add(get_stack_file_path(stack).parent)
else:
pod_root_dir = os.path.join(get_dev_root_path(None), pod["repository"].split("/")[-1], pod["path"])
result.add(Path(os.path.join(pod_root_dir, "stack")))
return list(result)
def get_pod_file_path(parsed_stack, pod_name: str):
pods = parsed_stack["pods"]
if type(pods[0]) is str:
result = os.path.join(get_compose_file_dir(), f"docker-compose-{pod_name}.yml")
else:
for pod in pods:
if pod["name"] == pod_name:
pod_root_dir = os.path.join(get_dev_root_path(None), pod["repository"].split("/")[-1], pod["path"])
result = os.path.join(pod_root_dir, "docker-compose.yml")
return result
def get_pod_script_paths(parsed_stack, pod_name: str):
pods = parsed_stack["pods"]
result = []
if not type(pods[0]) is str:
for pod in pods:
if pod["name"] == pod_name:
pod_root_dir = os.path.join(get_dev_root_path(None), pod["repository"].split("/")[-1], pod["path"])
if "pre_start_command" in pod:
result.append(os.path.join(pod_root_dir, pod["pre_start_command"]))
if "post_start_command" in pod:
result.append(os.path.join(pod_root_dir, pod["post_start_command"]))
return result
def pod_has_scripts(parsed_stack, pod_name: str):
pods = parsed_stack["pods"]
if type(pods[0]) is str:
result = False
else:
for pod in pods:
if pod["name"] == pod_name:
result = "pre_start_command" in pod or "post_start_command" in pod
return result
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def get_compose_file_dir():
# TODO: refactor to use common code with deploy command
# See: https://stackoverflow.com/questions/25389095/python-get-path-of-root-project-structure
data_dir = Path(__file__).absolute().parent.joinpath("data")
source_compose_dir = data_dir.joinpath("compose")
return source_compose_dir
def get_parsed_deployment_spec(spec_file):
spec_file_path = Path(spec_file)
try:
with spec_file_path:
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deploy_spec = get_yaml().load(open(spec_file_path, "r"))
return deploy_spec
except FileNotFoundError as error:
# We try here to generate a useful diagnostic error
print(f"Error: spec file: {spec_file_path} does not exist")
print(f"Exiting, error: {error}")
sys.exit(1)
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def stack_is_external(stack: str):
# Bit of a hack: if the supplied stack string represents
# a path that exists then we assume it must be external
return Path(stack).exists() if stack is not None else False
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def get_yaml():
# See: https://stackoverflow.com/a/45701840/1701505
yaml = ruamel.yaml.YAML()
yaml.preserve_quotes = True
yaml.indent(sequence=3, offset=1)
return yaml
# TODO: this is fragile wrt to the subcommand depth
# See also: https://github.com/pallets/click/issues/108
def global_options(ctx):
return ctx.parent.parent.obj
# TODO: hack
def global_options2(ctx):
return ctx.parent.obj
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def error_exit(s):
print(f"ERROR: {s}")
sys.exit(1)
def env_var_map_from_file(file: Path) -> Mapping[str, str]:
return dotenv_values(file)