mercurial/config.py
author Wagner Bruna <wbruna@softwareexpress.com.br>
Wed, 31 May 2017 19:24:00 -0300
branchstable
changeset 32574 870248603a4e
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child 32318 6a773d3050c9
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# config.py - configuration parsing for Mercurial
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#
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#  Copyright 2009 Matt Mackall <mpm@selenic.com> and others
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import errno
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import os
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from .i18n import _
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from . import (
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    error,
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    pycompat,
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    util,
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)
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class config(object):
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    def __init__(self, data=None, includepaths=None):
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        self._data = {}
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        self._source = {}
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        self._unset = []
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        self._includepaths = includepaths or []
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        if data:
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            for k in data._data:
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                self._data[k] = data[k].copy()
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            self._source = data._source.copy()
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    def copy(self):
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        return config(self)
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    def __contains__(self, section):
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        return section in self._data
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    def hasitem(self, section, item):
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        return item in self._data.get(section, {})
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    def __getitem__(self, section):
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        return self._data.get(section, {})
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    def __iter__(self):
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        for d in self.sections():
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            yield d
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    def update(self, src):
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        for s, n in src._unset:
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            if s in self and n in self._data[s]:
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                del self._data[s][n]
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                del self._source[(s, n)]
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        for s in src:
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            if s not in self:
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                self._data[s] = util.sortdict()
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            self._data[s].update(src._data[s])
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        self._source.update(src._source)
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    def get(self, section, item, default=None):
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        return self._data.get(section, {}).get(item, default)
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    def backup(self, section, item):
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        """return a tuple allowing restore to reinstall a previous value
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        The main reason we need it is because it handles the "no data" case.
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        """
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        try:
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            value = self._data[section][item]
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            source = self.source(section, item)
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            return (section, item, value, source)
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        except KeyError:
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            return (section, item)
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    def source(self, section, item):
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        return self._source.get((section, item), "")
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    def sections(self):
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        return sorted(self._data.keys())
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    def items(self, section):
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        return self._data.get(section, {}).items()
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    def set(self, section, item, value, source=""):
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        if pycompat.ispy3:
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            assert not isinstance(value, str), (
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                'config values may not be unicode strings on Python 3')
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        if section not in self:
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            self._data[section] = util.sortdict()
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        self._data[section][item] = value
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        if source:
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            self._source[(section, item)] = source
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    def restore(self, data):
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        """restore data returned by self.backup"""
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        if len(data) == 4:
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            # restore old data
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            section, item, value, source = data
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            self._data[section][item] = value
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            self._source[(section, item)] = source
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        else:
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            # no data before, remove everything
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            section, item = data
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            if section in self._data:
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                self._data[section].pop(item, None)
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            self._source.pop((section, item), None)
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    def parse(self, src, data, sections=None, remap=None, include=None):
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        sectionre = util.re.compile(br'\[([^\[]+)\]')
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        itemre = util.re.compile(br'([^=\s][^=]*?)\s*=\s*(.*\S|)')
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        contre = util.re.compile(br'\s+(\S|\S.*\S)\s*$')
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        emptyre = util.re.compile(br'(;|#|\s*$)')
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        commentre = util.re.compile(br'(;|#)')
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        unsetre = util.re.compile(br'%unset\s+(\S+)')
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        includere = util.re.compile(br'%include\s+(\S|\S.*\S)\s*$')
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        section = ""
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        item = None
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        line = 0
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        cont = False
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        for l in data.splitlines(True):
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            line += 1
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            if line == 1 and l.startswith('\xef\xbb\xbf'):
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                # Someone set us up the BOM
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                l = l[3:]
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            if cont:
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                if commentre.match(l):
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                    continue
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                m = contre.match(l)
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                if m:
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                    if sections and section not in sections:
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                        continue
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                    v = self.get(section, item) + "\n" + m.group(1)
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                    self.set(section, item, v, "%s:%d" % (src, line))
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                    continue
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                item = None
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                cont = False
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            m = includere.match(l)
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            if m and include:
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                expanded = util.expandpath(m.group(1))
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   130
                includepaths = [os.path.dirname(src)] + self._includepaths
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diff changeset
   131
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   132
                for base in includepaths:
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   133
                    inc = os.path.normpath(os.path.join(base, expanded))
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   134
10042
7cdd2a7db2c2 config: raise ConfigError on non-existing include files
Martin Geisler <mg@lazybytes.net>
parents: 9471
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   135
                    try:
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                        include(inc, remap=remap, sections=sections)
25095
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                        break
25660
328739ea70c3 global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents: 25095
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   138
                    except IOError as inst:
14486
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parents: 13664
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   139
                        if inst.errno != errno.ENOENT:
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                            raise error.ParseError(_("cannot include %s (%s)")
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   141
                                                   % (inc, inst.strerror),
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   142
                                                   "%s:%s" % (src, line))
8183
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   143
                continue
8144
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parents:
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   144
            if emptyre.match(l):
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   145
                continue
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parents:
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   146
            m = sectionre.match(l)
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   147
            if m:
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   148
                section = m.group(1)
8298
9542f4c3fa1b config: make remap actually work
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parents: 8265
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   149
                if remap:
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                    section = remap.get(section, section)
8144
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parents:
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   151
                if section not in self:
21813
c2262004c2e2 config: move config.sortdict class into util
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parents: 20789
diff changeset
   152
                    self._data[section] = util.sortdict()
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                continue
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   154
            m = itemre.match(l)
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   155
            if m:
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                item = m.group(1)
9339
9be91129c96e config: improve code readability
Andrey <py4fun@gmail.com>
parents: 9136
diff changeset
   157
                cont = True
8193
94246e90081e config: add section filter to read
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parents: 8192
diff changeset
   158
                if sections and section not in sections:
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   159
                    continue
8265
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diff changeset
   160
                self.set(section, item, m.group(2), "%s:%d" % (src, line))
8144
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parents:
diff changeset
   161
                continue
8184
9189afe1eba3 config: add %unset name support
Matt Mackall <mpm@selenic.com>
parents: 8183
diff changeset
   162
            m = unsetre.match(l)
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diff changeset
   163
            if m:
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   164
                name = m.group(1)
8193
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   165
                if sections and section not in sections:
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   166
                    continue
13031
3da456d0c885 code style: prefer 'is' and 'is not' tests with singletons
Martin Geisler <mg@aragost.com>
parents: 11292
diff changeset
   167
                if self.get(section, name) is not None:
8184
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Matt Mackall <mpm@selenic.com>
parents: 8183
diff changeset
   168
                    del self._data[section][name]
19087
7d82ad4b3727 config: discard "%unset" values defined in the other files read in previously
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 17537
diff changeset
   169
                self._unset.append((section, name))
8184
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                continue
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   171
11288
2123aad24d56 error: add new ParseError for various parsing errors
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parents: 11224
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   172
            raise error.ParseError(l.rstrip(), ("%s:%s" % (src, line)))
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parents: 8263
diff changeset
   173
52c5be55af82 config: add parse interface
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parents: 8263
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   174
    def read(self, path, fp=None, sections=None, remap=None):
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   175
        if not fp:
31154
fd3f4bf9325e config: load included config files in binary mode
Augie Fackler <raf@durin42.com>
parents: 30349
diff changeset
   176
            fp = util.posixfile(path, 'rb')
31176
99c5843b228d config: add sanity assert that files are opened as binary
Augie Fackler <raf@durin42.com>
parents: 31155
diff changeset
   177
        assert getattr(fp, 'mode', r'rb') == r'rb', (
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parents: 31155
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   178
            'config files must be opened in binary mode, got fp=%r mode=%r' % (
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parents: 31155
diff changeset
   179
                fp, fp.mode))
31155
8266802f0fa4 config: pass some optional args as keywords
Augie Fackler <raf@durin42.com>
parents: 31154
diff changeset
   180
        self.parse(path, fp.read(),
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   181
                   sections=sections, remap=remap, include=self.read)
31481
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   182
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   183
def parselist(value):
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   184
    """parse a configuration value as a list of comma/space separated strings
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   185
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   186
    >>> parselist('this,is "a small" ,test')
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   187
    ['this', 'is', 'a small', 'test']
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   188
    """
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   189
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   190
    def _parse_plain(parts, s, offset):
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   191
        whitespace = False
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   192
        while offset < len(s) and (s[offset:offset + 1].isspace()
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   193
                                   or s[offset:offset + 1] == ','):
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   194
            whitespace = True
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   195
            offset += 1
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   196
        if offset >= len(s):
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   197
            return None, parts, offset
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   198
        if whitespace:
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   199
            parts.append('')
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   200
        if s[offset:offset + 1] == '"' and not parts[-1]:
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   201
            return _parse_quote, parts, offset + 1
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diff changeset
   202
        elif s[offset:offset + 1] == '"' and parts[-1][-1] == '\\':
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diff changeset
   203
            parts[-1] = parts[-1][:-1] + s[offset:offset + 1]
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   204
            return _parse_plain, parts, offset + 1
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   205
        parts[-1] += s[offset:offset + 1]
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diff changeset
   206
        return _parse_plain, parts, offset + 1
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diff changeset
   207
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   208
    def _parse_quote(parts, s, offset):
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diff changeset
   209
        if offset < len(s) and s[offset:offset + 1] == '"': # ""
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diff changeset
   210
            parts.append('')
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diff changeset
   211
            offset += 1
a7c687c35119 ui: move configlist parser to config.py
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diff changeset
   212
            while offset < len(s) and (s[offset:offset + 1].isspace() or
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diff changeset
   213
                    s[offset:offset + 1] == ','):
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diff changeset
   214
                offset += 1
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diff changeset
   215
            return _parse_plain, parts, offset
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diff changeset
   216
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diff changeset
   217
        while offset < len(s) and s[offset:offset + 1] != '"':
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diff changeset
   218
            if (s[offset:offset + 1] == '\\' and offset + 1 < len(s)
a7c687c35119 ui: move configlist parser to config.py
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diff changeset
   219
                    and s[offset + 1:offset + 2] == '"'):
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diff changeset
   220
                offset += 1
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diff changeset
   221
                parts[-1] += '"'
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diff changeset
   222
            else:
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diff changeset
   223
                parts[-1] += s[offset:offset + 1]
a7c687c35119 ui: move configlist parser to config.py
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diff changeset
   224
            offset += 1
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diff changeset
   225
a7c687c35119 ui: move configlist parser to config.py
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diff changeset
   226
        if offset >= len(s):
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diff changeset
   227
            real_parts = _configlist(parts[-1])
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diff changeset
   228
            if not real_parts:
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diff changeset
   229
                parts[-1] = '"'
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diff changeset
   230
            else:
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diff changeset
   231
                real_parts[0] = '"' + real_parts[0]
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diff changeset
   232
                parts = parts[:-1]
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diff changeset
   233
                parts.extend(real_parts)
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diff changeset
   234
            return None, parts, offset
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diff changeset
   235
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diff changeset
   236
        offset += 1
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diff changeset
   237
        while offset < len(s) and s[offset:offset + 1] in [' ', ',']:
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diff changeset
   238
            offset += 1
a7c687c35119 ui: move configlist parser to config.py
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parents: 31374
diff changeset
   239
a7c687c35119 ui: move configlist parser to config.py
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diff changeset
   240
        if offset < len(s):
a7c687c35119 ui: move configlist parser to config.py
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parents: 31374
diff changeset
   241
            if offset + 1 == len(s) and s[offset:offset + 1] == '"':
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diff changeset
   242
                parts[-1] += '"'
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diff changeset
   243
                offset += 1
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parents: 31374
diff changeset
   244
            else:
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parents: 31374
diff changeset
   245
                parts.append('')
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parents: 31374
diff changeset
   246
        else:
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parents: 31374
diff changeset
   247
            return None, parts, offset
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parents: 31374
diff changeset
   248
a7c687c35119 ui: move configlist parser to config.py
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parents: 31374
diff changeset
   249
        return _parse_plain, parts, offset
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diff changeset
   250
a7c687c35119 ui: move configlist parser to config.py
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diff changeset
   251
    def _configlist(s):
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diff changeset
   252
        s = s.rstrip(' ,')
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diff changeset
   253
        if not s:
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diff changeset
   254
            return []
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diff changeset
   255
        parser, parts, offset = _parse_plain, [''], 0
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parents: 31374
diff changeset
   256
        while parser:
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diff changeset
   257
            parser, parts, offset = parser(parts, s, offset)
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   258
        return parts
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   259
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   260
    if value is not None and isinstance(value, bytes):
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diff changeset
   261
        result = _configlist(value.lstrip(' ,\n'))
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diff changeset
   262
    else:
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diff changeset
   263
        result = value
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diff changeset
   264
    return result or []