comparison mercurial/patch.py @ 38562:c88d2c9b00dd

diffutil: extract diff options code into a dedicated util-module

We want to be able to create and use diffoptions in more places. Currently the
official function to instantiate diffoptions live into `mercurial.patch`. A
module too high level to be easily imported in some places.

So we extract the diff options related function in their own utility module.

38561:600d8d9b8551

    util,
    vfs as vfsmod,
)
from .utils import (
    dateutil,
    procutil,
    stringutil,
)

stringio = util.stringio

        return changed

class GitDiffRequired(Exception):
    pass

def diffallopts(ui, opts=None, untrusted=False, section='diff'):
    '''return diffopts with all features supported and parsed'''
    return difffeatureopts(ui, opts=opts, untrusted=untrusted, section=section,
                           git=True, whitespace=True, formatchanging=True)

diffopts = diffallopts

def difffeatureopts(ui, opts=None, untrusted=False, section='diff', git=False,
                    whitespace=False, formatchanging=False):
    '''return diffopts with only opted-in features parsed

    Features:
    - git: git-style diffs
    - whitespace: whitespace options like ignoreblanklines and ignorews
    - formatchanging: options that will likely break or cause correctness issues
      with most diff parsers
    '''
    def get(key, name=None, getter=ui.configbool, forceplain=None):
        if opts:
            v = opts.get(key)
            # diffopts flags are either None-default (which is passed
            # through unchanged, so we can identify unset values), or
            # some other falsey default (eg --unified, which defaults
            # to an empty string). We only want to override the config
            # entries from hgrc with command line values if they
            # appear to have been set, which is any truthy value,
            # True, or False.
            if v or isinstance(v, bool):
                return v
        if forceplain is not None and ui.plain():
            return forceplain
        return getter(section, name or key, untrusted=untrusted)

    # core options, expected to be understood by every diff parser
    buildopts = {
        'nodates': get('nodates'),
        'showfunc': get('show_function', 'showfunc'),
        'context': get('unified', getter=ui.config),
    }
    buildopts['worddiff'] = ui.configbool('experimental', 'worddiff')
    buildopts['xdiff'] = ui.configbool('experimental', 'xdiff')

    if git:
        buildopts['git'] = get('git')

        # since this is in the experimental section, we need to call
        # ui.configbool directory
        buildopts['showsimilarity'] = ui.configbool('experimental',
                                                    'extendedheader.similarity')

        # need to inspect the ui object instead of using get() since we want to
        # test for an int
        hconf = ui.config('experimental', 'extendedheader.index')
        if hconf is not None:
            hlen = None
            try:
                # the hash config could be an integer (for length of hash) or a
                # word (e.g. short, full, none)
                hlen = int(hconf)
                if hlen < 0 or hlen > 40:
                    msg = _("invalid length for extendedheader.index: '%d'\n")
                    ui.warn(msg % hlen)
            except ValueError:
                # default value
                if hconf == 'short' or hconf == '':
                    hlen = 12
                elif hconf == 'full':
                    hlen = 40
                elif hconf != 'none':
                    msg = _("invalid value for extendedheader.index: '%s'\n")
                    ui.warn(msg % hconf)
            finally:
                buildopts['index'] = hlen

    if whitespace:
        buildopts['ignorews'] = get('ignore_all_space', 'ignorews')
        buildopts['ignorewsamount'] = get('ignore_space_change',
                                          'ignorewsamount')
        buildopts['ignoreblanklines'] = get('ignore_blank_lines',
                                            'ignoreblanklines')
        buildopts['ignorewseol'] = get('ignore_space_at_eol', 'ignorewseol')
    if formatchanging:
        buildopts['text'] = opts and opts.get('text')
        binary = None if opts is None else opts.get('binary')
        buildopts['nobinary'] = (not binary if binary is not None
                                 else get('nobinary', forceplain=False))
        buildopts['noprefix'] = get('noprefix', forceplain=False)

    return mdiff.diffopts(**pycompat.strkwargs(buildopts))

def diff(repo, node1=None, node2=None, match=None, changes=None,
         opts=None, losedatafn=None, prefix='', relroot='', copy=None,
         hunksfilterfn=None):
    '''yields diff of changes to files between two nodes, or node and

38562:c88d2c9b00dd

    util,
    vfs as vfsmod,
)
from .utils import (
    dateutil,
    diffutil,
    procutil,
    stringutil,
)

stringio = util.stringio

        return changed

class GitDiffRequired(Exception):
    pass

diffopts = diffutil.diffopts
diffallopts = diffutil.diffallopts
difffeatureopts = diffutil.difffeatureopts

def diff(repo, node1=None, node2=None, match=None, changes=None,
         opts=None, losedatafn=None, prefix='', relroot='', copy=None,
         hunksfilterfn=None):
    '''yields diff of changes to files between two nodes, or node and