author Mozilla Releng Treescript <release+treescript@mozilla.org>
Wed, 19 Jan 2022 06:57:01 +0000
changeset 604799 184fd64dd78347ea17dbd5aef4a9d8e40fcc9f7f
parent 571772 35166f2e193636dd628014891e7e16672ce08c4a
permissions -rw-r--r--
no bug - Bumping Firefox l10n changesets r=release a=l10n-bump DONTBUILD ach -> 977c0eee5774e3bd19a25900142d1dca3eb2ee29 af -> 162654a20c86192e124df9766ec5ecd54143d085 an -> d10834e1c7ba839ba9c372205f4371c4d3c19791 ar -> 3be417e9326ebc9e369fc77f1fd98481a39b07cf ast -> 41dcea23a9d890ee00cb4cc3797559fe461244bc az -> 0366cdbc61ed5620510c848b85cd593d376c75f3 be -> 62bb6ed3829ec227748a86410cf038052f673b54 bg -> 19ee7b31e0becafa054013a3c8c09844638f244c bn -> 010d5f74034cb2c18fd1100e0d0888a245d52a60 bo -> 97059fd9d1a83e254bf84da12f1612062e82d271 br -> a9e3b8ba10759c8a4f7da6b7970911ded7d04ad6 brx -> 573ec21d6a1aebf6a342533bb06b77c79b6e994b bs -> 9ebb98165b36860f938bfb97c1956090e8daf920 ca -> caf5515093962f3f92c92aea68dacd4c3e520a8d ca-valencia -> d8f8751d595bf879afe5bfa8e3854ee5b6d1b977 cak -> 0bbd8b94c9c02fa5ec6a3e5fd3bf3e69b0432829 ckb -> bd043d903599db44feb371bf29d4a3d510a48a0a cs -> ae677a6bee277f507e673c3fcd2d56088b2caafb cy -> c46474099266c675d8ddc8fbcecd23a8a11a174e da -> 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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this file,
# You can obtain one at http://mozilla.org/MPL/2.0/.

user preferences
from __future__ import absolute_import, print_function

import json
import mozfile
import os
import tokenize

from six.moves.configparser import SafeConfigParser as ConfigParser
from six import StringIO, string_types
import six

if six.PY3:

    def unicode(input):
        return input

__all__ = ("PreferencesReadError", "Preferences")

class PreferencesReadError(Exception):
    """read error for prefrences files"""

class Preferences(object):
    """assembly of preferences from various sources"""

    def __init__(self, prefs=None):
        self._prefs = []
        if prefs:

    def add(self, prefs, cast=False):
        :param prefs:
        :param cast: whether to cast strings to value, e.g. '1' -> 1
        # wants a list of 2-tuples
        if isinstance(prefs, dict):
            prefs = prefs.items()
        if cast:
            prefs = [(i, self.cast(j)) for i, j in prefs]
        self._prefs += prefs

    def add_file(self, path):
        """a preferences from a file

        :param path:

    def __call__(self):
        return self._prefs

    def cast(cls, value):
        interpolate a preference from a string
        from the command line or from e.g. an .ini file, there is no good way to denote
        what type the preference value is, as natively it is a string

        - integers will get cast to integers
        - true/false will get cast to True/False
        - anything enclosed in single quotes will be treated as a string
          with the ''s removed from both sides

        if not isinstance(value, string_types):
            return value  # no op
        quote = "'"
        if value == "true":
            return True
        if value == "false":
            return False
            return int(value)
        except ValueError:
        if value.startswith(quote) and value.endswith(quote):
            value = value[1:-1]
        return value

    def read(cls, path):
        """read preferences from a file"""

        section = None  # for .ini files
        basename = os.path.basename(path)
        if ":" in basename:
            # section of INI file
            path, section = path.rsplit(":", 1)

        if not os.path.exists(path) and not mozfile.is_url(path):
            raise PreferencesReadError("'%s' does not exist" % path)

        if section:
                return cls.read_ini(path, section)
            except PreferencesReadError:
            except Exception as e:
                raise PreferencesReadError(str(e))

        # try both JSON and .ini format
            return cls.read_json(path)
        except Exception as e:
                return cls.read_ini(path)
            except Exception as f:
                for exception in e, f:
                    if isinstance(exception, PreferencesReadError):
                        raise exception
                raise PreferencesReadError("Could not recognize format of %s" % path)

    def read_ini(cls, path, section=None):
        """read preferences from an .ini file"""

        parser = ConfigParser()
        parser.optionxform = str

        if section:
            if section not in parser.sections():
                raise PreferencesReadError("No section '%s' in %s" % (section, path))
            retval = parser.items(section, raw=True)
            retval = parser.defaults().items()

        # cast the preferences since .ini is just strings
        return [(i, cls.cast(j)) for i, j in retval]

    def read_json(cls, path):
        """read preferences from a JSON blob"""

        prefs = json.loads(mozfile.load(path).read())

        if type(prefs) not in [list, dict]:
            raise PreferencesReadError("Malformed preferences: %s" % path)
        if isinstance(prefs, list):
            if [i for i in prefs if type(i) != list or len(i) != 2]:
                raise PreferencesReadError("Malformed preferences: %s" % path)
            values = [i[1] for i in prefs]
        elif isinstance(prefs, dict):
            values = prefs.values()
            raise PreferencesReadError("Malformed preferences: %s" % path)
        types = (bool, string_types, int)
        if [i for i in values if not any([isinstance(i, j) for j in types])]:
            raise PreferencesReadError("Only bool, string, and int values allowed")
        return prefs

    def read_prefs(cls, path, pref_setter="user_pref", interpolation=None):
        Read preferences from (e.g.) prefs.js

        :param path: The path to the preference file to read.
        :param pref_setter: The name of the function used to set preferences
                            in the preference file.
        :param interpolation: If provided, a dict that will be passed
                              to str.format to interpolate preference values.

        marker = "##//"  # magical marker
        lines = [i.strip() for i in mozfile.load(path).readlines()]
        _lines = []
        for line in lines:
            # decode bytes in case of URL processing
            if isinstance(line, bytes):
                line = line.decode()
            if not line.startswith(pref_setter):
            if "//" in line:
                line = line.replace("//", marker)
        string = "\n".join(_lines)

        # skip trailing comments
        processed_tokens = []
        f_obj = StringIO(string)
        for token in tokenize.generate_tokens(f_obj.readline):
            if token[0] == tokenize.COMMENT:
            )  # [:2] gets around http://bugs.python.org/issue9974
        string = tokenize.untokenize(processed_tokens)

        retval = []

        def pref(a, b):
            if interpolation and isinstance(b, string_types):
                b = b.format(**interpolation)
            retval.append((a, b))

        lines = [i.strip().rstrip(";") for i in string.split("\n") if i.strip()]

        _globals = {"retval": retval, "true": True, "false": False}
        _globals[pref_setter] = pref
        for line in lines:
                eval(line, _globals, {})
            except SyntaxError:

        # de-magic the marker
        for index, (key, value) in enumerate(retval):
            if isinstance(value, string_types) and marker in value:
                retval[index] = (key, value.replace(marker, "//"))

        return retval

    def write(cls, _file, prefs, pref_string="user_pref(%s, %s);"):
        """write preferences to a file"""

        if isinstance(_file, string_types):
            f = open(_file, "a")
            f = _file

        if isinstance(prefs, dict):
            # order doesn't matter
            prefs = prefs.items()

        # serialize -> JSON
        _prefs = [(json.dumps(k), json.dumps(v)) for k, v in prefs]

        # write the preferences
        for _pref in _prefs:
            print(unicode(pref_string % _pref), file=f)

        # close the file if opened internally
        if isinstance(_file, string_types):