convert: don't drop commits that are empty in the source when using --filemap
I ran into this when using `hg lfconvert --to-normal` (which uses the filemap
class internally), and saw that commits with nothing but a branch change were
dropped. We could put in an option that only lfconvert uses internally. But
silently dropping anything other than a commit where all changes were excluded
seems unintended. For example, there's a message in mercurial_sink.putcommit()
if it drops an empty commit. (And the reason that isn't kicking in here is
because lfconvert isn't passing --filemap, so the self.filemapmode conditional
there is always False.)
The naive change of `return not files` broke test-convert-filemap.t, so this is
a little more elaborate than needed for converting from largefiles.
# highlight.py - highlight extension implementation file
#
# Copyright 2007-2009 Adam Hupp <adam@hupp.org> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
#
# The original module was split in an interface and an implementation
# file to defer pygments loading and speedup extension setup.
from __future__ import absolute_import
from mercurial import demandimport
demandimport.IGNORES.update(['pkgutil', 'pkg_resources', '__main__'])
from mercurial import (
encoding,
)
from mercurial.utils import (
stringutil,
)
with demandimport.deactivated():
import pygments
import pygments.formatters
import pygments.lexers
import pygments.plugin
import pygments.util
for unused in pygments.plugin.find_plugin_lexers():
pass
highlight = pygments.highlight
ClassNotFound = pygments.util.ClassNotFound
guess_lexer = pygments.lexers.guess_lexer
guess_lexer_for_filename = pygments.lexers.guess_lexer_for_filename
TextLexer = pygments.lexers.TextLexer
HtmlFormatter = pygments.formatters.HtmlFormatter
SYNTAX_CSS = ('\n<link rel="stylesheet" href="{url}highlightcss" '
'type="text/css" />')
def pygmentize(field, fctx, style, tmpl, guessfilenameonly=False):
# append a <link ...> to the syntax highlighting css
tmpl.load('header')
old_header = tmpl.cache['header']
if SYNTAX_CSS not in old_header:
new_header = old_header + SYNTAX_CSS
tmpl.cache['header'] = new_header
text = fctx.data()
if stringutil.binary(text):
return
# str.splitlines() != unicode.splitlines() because "reasons"
for c in "\x0c\x1c\x1d\x1e":
if c in text:
text = text.replace(c, '')
# Pygments is best used with Unicode strings:
# <http://pygments.org/docs/unicode/>
text = text.decode(encoding.encoding, 'replace')
# To get multi-line strings right, we can't format line-by-line
try:
lexer = guess_lexer_for_filename(fctx.path(), text[:1024],
stripnl=False)
except (ClassNotFound, ValueError):
# guess_lexer will return a lexer if *any* lexer matches. There is
# no way to specify a minimum match score. This can give a high rate of
# false positives on files with an unknown filename pattern.
if guessfilenameonly:
return
try:
lexer = guess_lexer(text[:1024], stripnl=False)
except (ClassNotFound, ValueError):
# Don't highlight unknown files
return
# Don't highlight text files
if isinstance(lexer, TextLexer):
return
formatter = HtmlFormatter(nowrap=True, style=style)
colorized = highlight(text, lexer, formatter)
coloriter = (s.encode(encoding.encoding, 'replace')
for s in colorized.splitlines())
tmpl._filters['colorize'] = lambda x: next(coloriter)
oldl = tmpl.cache[field]
newl = oldl.replace('line|escape', 'line|colorize')
tmpl.cache[field] = newl