view hgext/beautifygraph.py @ 38952:0e58c5b20745

mergetool: warn if ui.merge points to nonexistent tool

This adds a warning when ui.merge is configured but points to an
executable that doesn't exist. It gets printed once per fail, but that
seems to be how our other warnings about merge tools are reported.

Differential Revision: https://phab.mercurial-scm.org/D3975

# -*- coding: UTF-8 -*-
# beautifygraph.py - improve graph output by using Unicode characters
#
# Copyright 2018 John Stiles <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

'''beautify log -G output by using Unicode characters (EXPERIMENTAL)

   A terminal with UTF-8 support and monospace narrow text are required.
'''

from __future__ import absolute_import

from mercurial.i18n import _
from mercurial import (
    encoding,
    extensions,
    graphmod,
    pycompat,
    templatekw,
)

# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
testedwith = 'ships-with-hg-core'

def prettyedge(before, edge, after):
    if edge == '~':
        return '\xE2\x95\xA7' # U+2567 ╧
    if edge == 'X':
        return '\xE2\x95\xB3' # U+2573 ╳
    if edge == '/':
        return '\xE2\x95\xB1' # U+2571 ╱
    if edge == '-':
        return '\xE2\x94\x80' # U+2500 ─
    if edge == '|':
        return '\xE2\x94\x82' # U+2502 │
    if edge == ':':
        return '\xE2\x94\x86' # U+2506 ┆
    if edge == '\\':
        return '\xE2\x95\xB2' # U+2572 ╲
    if edge == '+':
        if before == ' ' and not after  == ' ':
            return '\xE2\x94\x9C' # U+251C ├
        if after  == ' ' and not before == ' ':
            return '\xE2\x94\xA4' # U+2524 ┤
        return '\xE2\x94\xBC' # U+253C ┼
    return edge

def convertedges(line):
    line = ' %s ' % line
    pretty = []
    for idx in pycompat.xrange(len(line) - 2):
        pretty.append(prettyedge(line[idx], line[idx + 1], line[idx + 2]))
    return ''.join(pretty)

def getprettygraphnode(orig, *args, **kwargs):
    node = orig(*args, **kwargs)
    if node == 'o':
        return '\xE2\x97\x8B' # U+25CB ○
    if node == '@':
        return '\xE2\x97\x8D' # U+25CD ◍
    if node == '*':
        return '\xE2\x88\x97' # U+2217 ∗
    if node == 'x':
        return '\xE2\x97\x8C' # U+25CC ◌
    if node == '_':
        return '\xE2\x95\xA4' # U+2564 ╤
    return node

def outputprettygraph(orig, ui, graph, *args, **kwargs):
    (edges, text) = zip(*graph)
    graph = zip([convertedges(e) for e in edges], text)
    return orig(ui, graph, *args, **kwargs)

def extsetup(ui):
    if encoding.encoding != 'UTF-8':
        ui.warn(_('beautifygraph: unsupported encoding, UTF-8 required\n'))
        return

    if 'A' in encoding._wide:
        ui.warn(_('beautifygraph: unsupported terminal settings, '
                  'monospace narrow text required\n'))
        return

    if ui.plain('graph'):
        return

    extensions.wrapfunction(graphmod, 'outputgraph', outputprettygraph)
    extensions.wrapfunction(templatekw, 'getgraphnode', getprettygraphnode)