tutor/tutor/commands/plugins.py

153 lines
5.1 KiB
Python

from __future__ import annotations
import os
import urllib.request
import click
import click.shell_completion
from tutor import config as tutor_config
from tutor import exceptions, fmt, hooks, plugins
from tutor.plugins.base import PLUGINS_ROOT, PLUGINS_ROOT_ENV_VAR_NAME
from .context import Context
class PluginName(click.ParamType):
"""
Convenient param type that supports plugin name autocompletion.
"""
def __init__(self, allow_all: bool = False):
self.allow_all = allow_all
def shell_complete(
self, ctx: click.Context, param: click.Parameter, incomplete: str
) -> list[click.shell_completion.CompletionItem]:
return [
click.shell_completion.CompletionItem(name)
for name in self.get_names(incomplete)
]
def get_names(self, incomplete: str) -> list[str]:
candidates = []
if self.allow_all:
candidates.append("all")
candidates += [name for name, _ in plugins.iter_info()]
return [name for name in candidates if name.startswith(incomplete)]
@click.group(
name="plugins",
short_help="Manage Tutor plugins",
help="Manage Tutor plugins to add new features and customise your Open edX platform",
)
def plugins_command() -> None:
"""
All plugin commands should work even if there is no existing config file. This is
because users might enable plugins prior to configuration or environment generation.
"""
@click.command(name="list", help="List installed plugins")
def list_command() -> None:
lines = []
first_column_width = 1
for plugin, plugin_info in plugins.iter_info():
plugin_info = plugin_info or ""
plugin_info.replace("\n", " ")
status = "" if plugins.is_loaded(plugin) else "(disabled)"
lines.append((plugin, status, plugin_info))
first_column_width = max([first_column_width, len(plugin) + 2])
for plugin, status, plugin_info in lines:
print(f"{plugin:{first_column_width}}\t{status:10}\t{plugin_info}")
@click.command(help="Enable a plugin")
@click.argument("plugin_names", metavar="plugin", nargs=-1, type=PluginName())
@click.pass_obj
def enable(context: Context, plugin_names: list[str]) -> None:
config = tutor_config.load_minimal(context.root)
for plugin in plugin_names:
plugins.load(plugin)
fmt.echo_info(f"Plugin {plugin} enabled")
tutor_config.save_enabled_plugins(config)
tutor_config.save_config_file(context.root, config)
fmt.echo_info(
"You should now re-generate your environment with `tutor config save`."
)
@click.command(
short_help="Disable a plugin",
help="Disable one or more plugins. Specify 'all' to disable all enabled plugins at once.",
)
@click.argument(
"plugin_names", metavar="plugin", nargs=-1, type=PluginName(allow_all=True)
)
@click.pass_obj
def disable(context: Context, plugin_names: list[str]) -> None:
config = tutor_config.load_minimal(context.root)
disable_all = "all" in plugin_names
disabled: list[str] = []
for plugin in tutor_config.get_enabled_plugins(config):
if disable_all or plugin in plugin_names:
fmt.echo_info(f"Disabling plugin {plugin}...")
hooks.Actions.PLUGIN_UNLOADED.do(plugin, context.root, config)
disabled.append(plugin)
fmt.echo_info(f"Plugin {plugin} disabled")
if disabled:
tutor_config.save_config_file(context.root, config)
fmt.echo_info(
"You should now re-generate your environment with `tutor config save`."
)
@click.command(
short_help="Print the location of yaml-based plugins",
help=f"""Print the location of yaml-based plugins. This location can be manually
defined by setting the {PLUGINS_ROOT_ENV_VAR_NAME} environment variable""",
)
def printroot() -> None:
fmt.echo(PLUGINS_ROOT)
@click.command(
short_help="Install a plugin",
help=f"""Install a plugin, either from a local Python/YAML file or a remote, web-hosted
location. The plugin will be installed to {PLUGINS_ROOT_ENV_VAR_NAME}.""",
)
@click.argument("location", type=click.Path(dir_okay=False))
def install(location: str) -> None:
basename = os.path.basename(location)
if not basename.endswith(".yml") and not basename.endswith(".py"):
basename += ".py"
plugin_path = os.path.join(PLUGINS_ROOT, basename)
if location.startswith("http"):
# Download file
response = urllib.request.urlopen(location)
content = response.read().decode()
elif os.path.isfile(location):
# Read file
with open(location, encoding="utf-8") as f:
content = f.read()
else:
raise exceptions.TutorError(f"No plugin found at {location}")
# Save file
if not os.path.exists(PLUGINS_ROOT):
os.makedirs(PLUGINS_ROOT)
with open(plugin_path, "w", newline="\n", encoding="utf-8") as f:
f.write(content)
fmt.echo_info(f"Plugin installed at {plugin_path}")
plugins_command.add_command(list_command)
plugins_command.add_command(enable)
plugins_command.add_command(disable)
plugins_command.add_command(printroot)
plugins_command.add_command(install)