tutor/tutor/commands/cli.py

138 lines
4.1 KiB
Python
Executable File

from __future__ import annotations
import sys
import typing as t
import appdirs
import click
from tutor import exceptions, fmt, hooks, utils
from tutor.__about__ import __app__, __version__
from tutor.commands.config import config_command
from tutor.commands.context import Context
from tutor.commands.dev import dev
from tutor.commands.images import images_command
from tutor.commands.k8s import k8s
from tutor.commands.local import local
from tutor.commands.mounts import mounts_command
from tutor.commands.plugins import plugins_command
def main() -> None:
try:
# Everyone on board
# Note that this action should not be triggered in the module scope, because it
# makes it difficult for tests to rollback changes.
hooks.Actions.CORE_READY.do()
cli() # pylint: disable=no-value-for-parameter
except KeyboardInterrupt:
pass
except exceptions.TutorError as e:
fmt.echo_error(f"Error: {e.args[0]}")
sys.exit(1)
class TutorCli(click.Group):
"""
Dynamically load subcommands at runtime.
This is necessary to load plugin subcommands, based on the list of enabled
plugins (and thus of config.yml).
Docs: https://click.palletsprojects.com/en/latest/commands/#custom-multi-commands
"""
IS_ROOT_READY = False
def get_command(
self, ctx: click.Context, cmd_name: str
) -> t.Optional[click.Command]:
"""
This is run when passing a command from the CLI. E.g: tutor config ...
"""
self.ensure_plugins_enabled(ctx)
return super().get_command(ctx, cmd_name=cmd_name)
def list_commands(self, ctx: click.Context) -> list[str]:
"""
This is run in the following cases:
- shell autocompletion: tutor <tab>
- print help: tutor, tutor -h
"""
self.ensure_plugins_enabled(ctx)
return super().list_commands(ctx)
def ensure_plugins_enabled(self, ctx: click.Context) -> None:
"""
We enable plugins as soon as possible to have access to commands.
"""
if not "root" in ctx.params:
# When generating docs, this function is called with empty args.
# That's ok, we just ignore it.
return
if not self.IS_ROOT_READY:
hooks.Actions.PROJECT_ROOT_READY.do(ctx.params["root"])
self.IS_ROOT_READY = True
for cmd in hooks.Filters.CLI_COMMANDS.iterate():
self.add_command(cmd)
@click.group(
cls=TutorCli,
invoke_without_command=True,
add_help_option=False, # Context is incorrectly loaded when help option is automatically added
help="Tutor is the Docker-based Open edX distribution designed for peace of mind.",
)
@click.version_option(version=__version__)
@click.option(
"-r",
"--root",
envvar="TUTOR_ROOT",
default=appdirs.user_data_dir(appname=__app__),
show_default=True,
type=click.Path(resolve_path=True),
help="Root project directory (environment variable: TUTOR_ROOT)",
)
@click.option(
"-h",
"--help",
"show_help",
is_flag=True,
help="Print this help",
)
@click.pass_context
def cli(context: click.Context, root: str, show_help: bool) -> None:
if utils.is_root():
fmt.echo_alert(
"You are running Tutor as root. This is strongly not recommended. If you are doing this in order to access"
" the Docker daemon, you should instead add your user to the 'docker' group. (see https://docs.docker.com"
"/install/linux/linux-postinstall/#manage-docker-as-a-non-root-user)"
)
context.obj = Context(root)
context.help_option_names = ["-h", "--help"]
if context.invoked_subcommand is None or show_help:
click.echo(context.get_help())
@click.command(help="Print this help", name="help")
@click.pass_context
def help_command(context: click.Context) -> None:
context.invoke(cli, show_help=True)
hooks.Filters.CLI_COMMANDS.add_items(
[
config_command,
dev,
help_command,
images_command,
k8s,
local,
mounts_command,
plugins_command,
]
)
if __name__ == "__main__":
main()