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https://github.com/SteamDeckHomebrew/decky-loader.git
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Expose a 'decky_plugin' module to decky plugins (#353)
* Expose a 'decky_plugin' module to decky plugins * expose decky user home path * support 'py_modules' python modules in plugins * allow for a '_migration' method in plugins to have an explicit file moving step * Expose the plugin python module as .pyi stub interface * Expose system and user python paths to plugins
This commit is contained in:
Philipp Richter
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plugin/decky_plugin.py
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201
plugin/decky_plugin.py
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"""
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This module exposes various constants and helpers useful for decky plugins.
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* Plugin's settings and configurations should be stored under `DECKY_PLUGIN_SETTINGS_DIR`.
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* Plugin's runtime data should be stored under `DECKY_PLUGIN_RUNTIME_DIR`.
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* Plugin's persistent log files should be stored under `DECKY_PLUGIN_LOG_DIR`.
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Avoid writing outside of `DECKY_HOME`, storing under the suggested paths is strongly recommended.
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Some basic migration helpers are available: `migrate_any`, `migrate_settings`, `migrate_runtime`, `migrate_logs`.
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A logging facility `logger` is available which writes to the recommended location.
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"""
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__version__ = '0.1.0'
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import os
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import subprocess
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import logging
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"""
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Constants
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"""
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HOME: str = os.getenv("HOME", default="")
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"""
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The home directory of the effective user running the process.
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Environment variable: `HOME`.
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If `root` was specified in the plugin's flags it will be `/root` otherwise the user whose home decky resides in.
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e.g.: `/home/deck`
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"""
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USER: str = os.getenv("USER", default="")
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"""
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The effective username running the process.
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Environment variable: `USER`.
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It would be `root` if `root` was specified in the plugin's flags otherwise the user whose home decky resides in.
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e.g.: `deck`
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"""
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DECKY_VERSION: str = os.getenv("DECKY_VERSION", default="")
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"""
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The version of the decky loader.
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Environment variable: `DECKY_VERSION`.
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e.g.: `v2.5.0-pre1`
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"""
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DECKY_USER: str = os.getenv("DECKY_USER", default="")
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"""
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The user whose home decky resides in.
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Environment variable: `DECKY_USER`.
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e.g.: `deck`
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"""
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DECKY_USER_HOME: str = os.getenv("DECKY_USER_HOME", default="")
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"""
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The home of the user where decky resides in.
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Environment variable: `DECKY_USER_HOME`.
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e.g.: `/home/deck`
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"""
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DECKY_HOME: str = os.getenv("DECKY_HOME", default="")
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"""
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The root of the decky folder.
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Environment variable: `DECKY_HOME`.
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e.g.: `/home/deck/homebrew`
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"""
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DECKY_PLUGIN_SETTINGS_DIR: str = os.getenv(
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"DECKY_PLUGIN_SETTINGS_DIR", default="")
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"""
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The recommended path in which to store configuration files (created automatically).
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Environment variable: `DECKY_PLUGIN_SETTINGS_DIR`.
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e.g.: `/home/deck/homebrew/settings/decky-plugin-template`
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"""
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DECKY_PLUGIN_RUNTIME_DIR: str = os.getenv(
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"DECKY_PLUGIN_RUNTIME_DIR", default="")
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"""
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The recommended path in which to store runtime data (created automatically).
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Environment variable: `DECKY_PLUGIN_RUNTIME_DIR`.
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e.g.: `/home/deck/homebrew/data/decky-plugin-template`
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"""
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DECKY_PLUGIN_LOG_DIR: str = os.getenv("DECKY_PLUGIN_LOG_DIR", default="")
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"""
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The recommended path in which to store persistent logs (created automatically).
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Environment variable: `DECKY_PLUGIN_LOG_DIR`.
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e.g.: `/home/deck/homebrew/logs/decky-plugin-template`
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"""
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DECKY_PLUGIN_DIR: str = os.getenv("DECKY_PLUGIN_DIR", default="")
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"""
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The root of the plugin's directory.
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Environment variable: `DECKY_PLUGIN_DIR`.
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e.g.: `/home/deck/homebrew/plugins/decky-plugin-template`
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"""
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DECKY_PLUGIN_NAME: str = os.getenv("DECKY_PLUGIN_NAME", default="")
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"""
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The name of the plugin as specified in the 'plugin.json'.
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Environment variable: `DECKY_PLUGIN_NAME`.
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e.g.: `Example Plugin`
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"""
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DECKY_PLUGIN_VERSION: str = os.getenv("DECKY_PLUGIN_VERSION", default="")
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"""
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The version of the plugin as specified in the 'package.json'.
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Environment variable: `DECKY_PLUGIN_VERSION`.
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e.g.: `0.0.1`
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"""
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DECKY_PLUGIN_AUTHOR: str = os.getenv("DECKY_PLUGIN_AUTHOR", default="")
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"""
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The author of the plugin as specified in the 'plugin.json'.
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Environment variable: `DECKY_PLUGIN_AUTHOR`.
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e.g.: `John Doe`
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"""
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DECKY_PLUGIN_LOG: str = os.path.join(DECKY_PLUGIN_LOG_DIR, "plugin.log")
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"""
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The path to the plugin's main logfile.
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Environment variable: `DECKY_PLUGIN_LOG`.
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e.g.: `/home/deck/homebrew/logs/decky-plugin-template/plugin.log`
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"""
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"""
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Migration helpers
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"""
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def migrate_any(target_dir: str, *files_or_directories: str) -> dict[str, str]:
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"""
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Migrate files and directories to a new location and remove old locations.
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Specified files will be migrated to `target_dir`.
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Specified directories will have their contents recursively migrated to `target_dir`.
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Returns the mapping of old -> new location.
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"""
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file_map: dict[str, str] = {}
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for f in files_or_directories:
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if not os.path.exists(f):
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file_map[f] = ""
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continue
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if os.path.isdir(f):
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src_dir = f
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src_file = "."
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file_map[f] = target_dir
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else:
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src_dir = os.path.dirname(f)
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src_file = os.path.basename(f)
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file_map[f] = os.path.join(target_dir, src_file)
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subprocess.run(["sh", "-c", "mkdir -p \"$3\"; tar -cf - -C \"$1\" \"$2\" | tar -xf - -C \"$3\" && rm -rf \"$4\"",
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"_", src_dir, src_file, target_dir, f])
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return file_map
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def migrate_settings(*files_or_directories: str) -> dict[str, str]:
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"""
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Migrate files and directories relating to plugin settings to the recommended location and remove old locations.
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Specified files will be migrated to `DECKY_PLUGIN_SETTINGS_DIR`.
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Specified directories will have their contents recursively migrated to `DECKY_PLUGIN_SETTINGS_DIR`.
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Returns the mapping of old -> new location.
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"""
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return migrate_any(DECKY_PLUGIN_SETTINGS_DIR, *files_or_directories)
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def migrate_runtime(*files_or_directories: str) -> dict[str, str]:
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"""
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Migrate files and directories relating to plugin runtime data to the recommended location and remove old locations
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Specified files will be migrated to `DECKY_PLUGIN_RUNTIME_DIR`.
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Specified directories will have their contents recursively migrated to `DECKY_PLUGIN_RUNTIME_DIR`.
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Returns the mapping of old -> new location.
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"""
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return migrate_any(DECKY_PLUGIN_RUNTIME_DIR, *files_or_directories)
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def migrate_logs(*files_or_directories: str) -> dict[str, str]:
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"""
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Migrate files and directories relating to plugin logs to the recommended location and remove old locations.
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Specified files will be migrated to `DECKY_PLUGIN_LOG_DIR`.
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Specified directories will have their contents recursively migrated to `DECKY_PLUGIN_LOG_DIR`.
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Returns the mapping of old -> new location.
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"""
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return migrate_any(DECKY_PLUGIN_LOG_DIR, *files_or_directories)
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"""
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Logging
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"""
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logging.basicConfig(filename=DECKY_PLUGIN_LOG,
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format='[%(asctime)s][%(levelname)s]: %(message)s',
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force=True)
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logger: logging.Logger = logging.getLogger()
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"""The main plugin logger writing to `DECKY_PLUGIN_LOG`."""
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logger.setLevel(logging.INFO)
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