view hgext/fsmonitor/pywatchman/capabilities.py @ 31110:7fec37746417

color: add a 'ui.color' option to control color behavior

This new option control whether or not color will be used. It mirror the behavior
of '--color'. I usually avoid adding new option to '[ui]' as the section is
already filled with many option. However, I feel like 'color' is central enough
to deserves a spot in this '[ui]' section.

For now the option is not documented so it is still marked as experimental. Once
it get documented and official, we should be able to deprecate the color
extensions.

There is more cleanup to do before that documentation is written, but we need
this option early to made them. Having that option will allow for more cleanup
of the initialisation process and proper separation between color
configuration.

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from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
# no unicode literals

import re

def parse_version(vstr):
    res = 0
    for n in vstr.split('.'):
        res = res * 1000
        res = res + int(n)
    return res

cap_versions = {
    "cmd-watch-del-all": "3.1.1",
    "cmd-watch-project": "3.1",
    "relative_root": "3.3",
    "term-dirname": "3.1",
    "term-idirname": "3.1",
    "wildmatch": "3.7",
}

def check(version, name):
    if name in cap_versions:
        return version >= parse_version(cap_versions[name])
    return False

def synthesize(vers, opts):
    """ Synthesize a capability enabled version response
        This is a very limited emulation for relatively recent feature sets
    """
    parsed_version = parse_version(vers['version'])
    vers['capabilities'] = {}
    for name in opts['optional']:
        vers['capabilities'][name] = check(parsed_version, name)
    failed = False
    for name in opts['required']:
        have = check(parsed_version, name)
        vers['capabilities'][name] = have
        if not have:
            vers['error'] = 'client required capability `' + name + \
                            '` is not supported by this server'
    return vers