mirror of
https://github.com/mikf/gallery-dl.git
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324 lines
8.0 KiB
Python
324 lines
8.0 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2015-2023 Mike Fährmann
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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"""Global configuration module"""
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import sys
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import os.path
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import logging
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from . import util
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log = logging.getLogger("config")
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# --------------------------------------------------------------------
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# internals
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_config = {}
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_files = []
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if util.WINDOWS:
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_default_configs = [
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r"%APPDATA%\gallery-dl\config.json",
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r"%USERPROFILE%\gallery-dl\config.json",
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r"%USERPROFILE%\gallery-dl.conf",
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]
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else:
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_default_configs = [
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"/etc/gallery-dl.conf",
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"${XDG_CONFIG_HOME}/gallery-dl/config.json"
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if os.environ.get("XDG_CONFIG_HOME") else
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"${HOME}/.config/gallery-dl/config.json",
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"${HOME}/.gallery-dl.conf",
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]
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if util.EXECUTABLE:
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# look for config file in PyInstaller executable directory (#682)
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_default_configs.append(os.path.join(
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os.path.dirname(sys.executable),
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"gallery-dl.conf",
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))
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# --------------------------------------------------------------------
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# public interface
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def initialize():
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paths = list(map(util.expand_path, _default_configs))
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for path in paths:
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if os.access(path, os.R_OK | os.W_OK):
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log.error("There is already a configuration file at '%s'", path)
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return 1
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for path in paths:
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try:
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os.makedirs(os.path.dirname(path), exist_ok=True)
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with open(path, "x", encoding="utf-8") as fp:
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fp.write("""\
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{
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"extractor": {
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},
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"downloader": {
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},
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"output": {
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},
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"postprocessor": {
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}
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}
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""")
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break
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except OSError as exc:
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log.debug("%s: %s", exc.__class__.__name__, exc)
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else:
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log.error("Unable to create a new configuration file "
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"at any of the default paths")
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return 1
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log.info("Created a basic configuration file at '%s'", path)
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return 0
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def open_extern():
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for path in _default_configs:
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path = util.expand_path(path)
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if os.access(path, os.R_OK | os.W_OK):
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break
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else:
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log.warning("Unable to find any writable configuration file")
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return 1
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if util.WINDOWS:
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openers = ("explorer", "notepad")
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else:
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openers = ("xdg-open", "open")
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editor = os.environ.get("EDITOR")
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if editor:
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openers = (editor,) + openers
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import shutil
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for opener in openers:
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opener = shutil.which(opener)
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if opener:
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break
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else:
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log.warning("Unable to find a program to open '%s' with", path)
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return 1
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log.info("Running '%s %s'", opener, path)
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retcode = util.Popen((opener, path)).wait()
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if not retcode:
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try:
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with open(path, encoding="utf-8") as fp:
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util.json_loads(fp.read())
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except Exception as exc:
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log.warning("%s when parsing '%s': %s",
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exc.__class__.__name__, path, exc)
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return 2
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return retcode
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def status():
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from .output import stdout_write
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paths = []
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for path in _default_configs:
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path = util.expand_path(path)
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try:
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with open(path, encoding="utf-8") as fp:
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util.json_loads(fp.read())
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except FileNotFoundError:
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status = "Not Present"
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except OSError:
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status = "Inaccessible"
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except ValueError:
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status = "Invalid JSON"
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except Exception as exc:
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log.debug(exc)
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status = "Unknown"
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else:
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status = "OK"
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paths.append((path, status))
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fmt = "{{:<{}}} : {{}}\n".format(
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max(len(p[0]) for p in paths)).format
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for path, status in paths:
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stdout_write(fmt(path, status))
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def load(files=None, strict=False, loads=util.json_loads):
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"""Load JSON configuration files"""
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for pathfmt in files or _default_configs:
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path = util.expand_path(pathfmt)
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try:
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with open(path, encoding="utf-8") as fp:
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conf = loads(fp.read())
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except OSError as exc:
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if strict:
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log.error(exc)
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raise SystemExit(1)
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except Exception as exc:
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log.error("%s when loading '%s': %s",
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exc.__class__.__name__, path, exc)
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if strict:
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raise SystemExit(2)
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else:
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if not _config:
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_config.update(conf)
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else:
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util.combine_dict(_config, conf)
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_files.append(pathfmt)
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if "subconfigs" in conf:
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subconfigs = conf["subconfigs"]
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if subconfigs:
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if isinstance(subconfigs, str):
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subconfigs = (subconfigs,)
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load(subconfigs, strict, loads)
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def clear():
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"""Reset configuration to an empty state"""
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_config.clear()
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def get(path, key, default=None, conf=_config):
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"""Get the value of property 'key' or a default value"""
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try:
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for p in path:
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conf = conf[p]
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return conf[key]
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except Exception:
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return default
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def interpolate(path, key, default=None, conf=_config):
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"""Interpolate the value of 'key'"""
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if key in conf:
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return conf[key]
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try:
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for p in path:
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conf = conf[p]
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if key in conf:
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default = conf[key]
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except Exception:
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pass
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return default
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def interpolate_common(common, paths, key, default=None, conf=_config):
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"""Interpolate the value of 'key'
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using multiple 'paths' along a 'common' ancestor
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"""
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if key in conf:
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return conf[key]
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# follow the common path
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try:
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for p in common:
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conf = conf[p]
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if key in conf:
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default = conf[key]
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except Exception:
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return default
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# try all paths until a value is found
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value = util.SENTINEL
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for path in paths:
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c = conf
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try:
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for p in path:
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c = c[p]
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if key in c:
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value = c[key]
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except Exception:
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pass
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if value is not util.SENTINEL:
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return value
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return default
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def accumulate(path, key, conf=_config):
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"""Accumulate the values of 'key' along 'path'"""
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result = []
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try:
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if key in conf:
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value = conf[key]
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if value:
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result.extend(value)
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for p in path:
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conf = conf[p]
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if key in conf:
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value = conf[key]
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if value:
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result[:0] = value
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except Exception:
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pass
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return result
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def set(path, key, value, conf=_config):
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"""Set the value of property 'key' for this session"""
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for p in path:
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try:
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conf = conf[p]
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except KeyError:
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conf[p] = conf = {}
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conf[key] = value
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def setdefault(path, key, value, conf=_config):
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"""Set the value of property 'key' if it doesn't exist"""
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for p in path:
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try:
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conf = conf[p]
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except KeyError:
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conf[p] = conf = {}
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return conf.setdefault(key, value)
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def unset(path, key, conf=_config):
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"""Unset the value of property 'key'"""
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try:
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for p in path:
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conf = conf[p]
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del conf[key]
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except Exception:
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pass
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class apply():
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"""Context Manager: apply a collection of key-value pairs"""
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def __init__(self, kvlist):
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self.original = []
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self.kvlist = kvlist
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def __enter__(self):
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for path, key, value in self.kvlist:
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self.original.append((path, key, get(path, key, util.SENTINEL)))
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set(path, key, value)
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def __exit__(self, exc_type, exc_value, traceback):
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for path, key, value in self.original:
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if value is util.SENTINEL:
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unset(path, key)
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else:
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set(path, key, value)
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