mirror of
https://github.com/facebook/sapling.git
synced 2024-10-07 23:38:50 +03:00
6796ac95d5
These changes are not useful to record itself, since it is hard coded to always generate git style diffs. But it makes parsepatch() more generally useful for parsing normal patch files.
584 lines
19 KiB
Python
584 lines
19 KiB
Python
# record.py
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#
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# Copyright 2007 Bryan O'Sullivan <bos@serpentine.com>
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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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'''commands to interactively select changes for commit/qrefresh'''
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from mercurial.i18n import gettext, _
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from mercurial import cmdutil, commands, extensions, hg, mdiff, patch
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from mercurial import util
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import copy, cStringIO, errno, os, re, shutil, tempfile
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lines_re = re.compile(r'@@ -(\d+),(\d+) \+(\d+),(\d+) @@\s*(.*)')
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def scanpatch(fp):
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"""like patch.iterhunks, but yield different events
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- ('file', [header_lines + fromfile + tofile])
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- ('context', [context_lines])
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- ('hunk', [hunk_lines])
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- ('range', (-start,len, +start,len, diffp))
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"""
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lr = patch.linereader(fp)
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def scanwhile(first, p):
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"""scan lr while predicate holds"""
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lines = [first]
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while True:
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line = lr.readline()
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if not line:
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break
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if p(line):
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lines.append(line)
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else:
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lr.push(line)
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break
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return lines
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while True:
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line = lr.readline()
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if not line:
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break
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if line.startswith('diff --git a/') or line.startswith('diff -r '):
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def notheader(line):
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s = line.split(None, 1)
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return not s or s[0] not in ('---', 'diff')
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header = scanwhile(line, notheader)
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fromfile = lr.readline()
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if fromfile.startswith('---'):
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tofile = lr.readline()
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header += [fromfile, tofile]
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else:
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lr.push(fromfile)
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yield 'file', header
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elif line[0] == ' ':
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yield 'context', scanwhile(line, lambda l: l[0] in ' \\')
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elif line[0] in '-+':
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yield 'hunk', scanwhile(line, lambda l: l[0] in '-+\\')
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else:
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m = lines_re.match(line)
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if m:
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yield 'range', m.groups()
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else:
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raise patch.PatchError('unknown patch content: %r' % line)
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class header(object):
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"""patch header
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XXX shoudn't we move this to mercurial/patch.py ?
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"""
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diffgit_re = re.compile('diff --git a/(.*) b/(.*)$')
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diff_re = re.compile('diff -r .* (.*)$')
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allhunks_re = re.compile('(?:index|new file|deleted file) ')
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pretty_re = re.compile('(?:new file|deleted file) ')
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special_re = re.compile('(?:index|new|deleted|copy|rename) ')
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def __init__(self, header):
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self.header = header
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self.hunks = []
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def binary(self):
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for h in self.header:
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if h.startswith('index '):
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return True
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def pretty(self, fp):
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for h in self.header:
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if h.startswith('index '):
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fp.write(_('this modifies a binary file (all or nothing)\n'))
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break
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if self.pretty_re.match(h):
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fp.write(h)
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if self.binary():
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fp.write(_('this is a binary file\n'))
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break
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if h.startswith('---'):
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fp.write(_('%d hunks, %d lines changed\n') %
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(len(self.hunks),
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sum([max(h.added, h.removed) for h in self.hunks])))
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break
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fp.write(h)
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def write(self, fp):
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fp.write(''.join(self.header))
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def allhunks(self):
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for h in self.header:
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if self.allhunks_re.match(h):
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return True
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def files(self):
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match = self.diffgit_re.match(self.header[0])
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if match:
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fromfile, tofile = match.groups()
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if fromfile == tofile:
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return [fromfile]
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return [fromfile, tofile]
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else:
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return self.diff_re.match(self.header[0]).groups()
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def filename(self):
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return self.files()[-1]
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def __repr__(self):
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return '<header %s>' % (' '.join(map(repr, self.files())))
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def special(self):
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for h in self.header:
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if self.special_re.match(h):
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return True
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def countchanges(hunk):
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"""hunk -> (n+,n-)"""
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add = len([h for h in hunk if h[0] == '+'])
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rem = len([h for h in hunk if h[0] == '-'])
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return add, rem
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class hunk(object):
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"""patch hunk
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XXX shouldn't we merge this with patch.hunk ?
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"""
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maxcontext = 3
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def __init__(self, header, fromline, toline, proc, before, hunk, after):
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def trimcontext(number, lines):
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delta = len(lines) - self.maxcontext
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if False and delta > 0:
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return number + delta, lines[:self.maxcontext]
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return number, lines
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self.header = header
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self.fromline, self.before = trimcontext(fromline, before)
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self.toline, self.after = trimcontext(toline, after)
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self.proc = proc
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self.hunk = hunk
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self.added, self.removed = countchanges(self.hunk)
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def write(self, fp):
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delta = len(self.before) + len(self.after)
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if self.after and self.after[-1] == '\\ No newline at end of file\n':
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delta -= 1
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fromlen = delta + self.removed
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tolen = delta + self.added
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fp.write('@@ -%d,%d +%d,%d @@%s\n' %
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(self.fromline, fromlen, self.toline, tolen,
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self.proc and (' ' + self.proc)))
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fp.write(''.join(self.before + self.hunk + self.after))
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pretty = write
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def filename(self):
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return self.header.filename()
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def __repr__(self):
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return '<hunk %r@%d>' % (self.filename(), self.fromline)
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def parsepatch(fp):
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"""patch -> [] of hunks """
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class parser(object):
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"""patch parsing state machine"""
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def __init__(self):
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self.fromline = 0
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self.toline = 0
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self.proc = ''
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self.header = None
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self.context = []
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self.before = []
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self.hunk = []
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self.stream = []
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def addrange(self, limits):
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fromstart, fromend, tostart, toend, proc = limits
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self.fromline = int(fromstart)
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self.toline = int(tostart)
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self.proc = proc
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def addcontext(self, context):
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if self.hunk:
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h = hunk(self.header, self.fromline, self.toline, self.proc,
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self.before, self.hunk, context)
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self.header.hunks.append(h)
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self.stream.append(h)
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self.fromline += len(self.before) + h.removed
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self.toline += len(self.before) + h.added
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self.before = []
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self.hunk = []
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self.proc = ''
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self.context = context
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def addhunk(self, hunk):
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if self.context:
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self.before = self.context
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self.context = []
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self.hunk = hunk
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def newfile(self, hdr):
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self.addcontext([])
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h = header(hdr)
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self.stream.append(h)
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self.header = h
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def finished(self):
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self.addcontext([])
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return self.stream
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transitions = {
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'file': {'context': addcontext,
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'file': newfile,
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'hunk': addhunk,
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'range': addrange},
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'context': {'file': newfile,
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'hunk': addhunk,
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'range': addrange},
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'hunk': {'context': addcontext,
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'file': newfile,
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'range': addrange},
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'range': {'context': addcontext,
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'hunk': addhunk},
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}
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p = parser()
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state = 'context'
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for newstate, data in scanpatch(fp):
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try:
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p.transitions[state][newstate](p, data)
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except KeyError:
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raise patch.PatchError('unhandled transition: %s -> %s' %
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(state, newstate))
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state = newstate
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return p.finished()
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def filterpatch(ui, chunks):
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"""Interactively filter patch chunks into applied-only chunks"""
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chunks = list(chunks)
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chunks.reverse()
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seen = set()
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def consumefile():
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"""fetch next portion from chunks until a 'header' is seen
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NB: header == new-file mark
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"""
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consumed = []
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while chunks:
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if isinstance(chunks[-1], header):
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break
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else:
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consumed.append(chunks.pop())
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return consumed
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resp_all = [None] # this two are changed from inside prompt,
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resp_file = [None] # so can't be usual variables
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applied = {} # 'filename' -> [] of chunks
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def prompt(query):
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"""prompt query, and process base inputs
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- y/n for the rest of file
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- y/n for the rest
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- ? (help)
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- q (quit)
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Returns True/False and sets reps_all and resp_file as
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appropriate.
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"""
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if resp_all[0] is not None:
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return resp_all[0]
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if resp_file[0] is not None:
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return resp_file[0]
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while True:
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resps = _('[Ynsfdaq?]')
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choices = (_('&Yes, record this change'),
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_('&No, skip this change'),
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_('&Skip remaining changes to this file'),
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_('Record remaining changes to this &file'),
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_('&Done, skip remaining changes and files'),
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_('Record &all changes to all remaining files'),
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_('&Quit, recording no changes'),
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_('&?'))
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r = ui.promptchoice("%s %s" % (query, resps), choices)
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ui.write("\n")
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if r == 7: # ?
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doc = gettext(record.__doc__)
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c = doc.find('::') + 2
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for l in doc[c:].splitlines():
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if l.startswith(' '):
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ui.write(l.strip(), '\n')
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continue
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elif r == 0: # yes
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ret = True
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elif r == 1: # no
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ret = False
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elif r == 2: # Skip
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ret = resp_file[0] = False
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elif r == 3: # file (Record remaining)
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ret = resp_file[0] = True
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elif r == 4: # done, skip remaining
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ret = resp_all[0] = False
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elif r == 5: # all
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ret = resp_all[0] = True
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elif r == 6: # quit
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raise util.Abort(_('user quit'))
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return ret
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pos, total = 0, len(chunks) - 1
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while chunks:
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pos = total - len(chunks) + 1
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chunk = chunks.pop()
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if isinstance(chunk, header):
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# new-file mark
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resp_file = [None]
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fixoffset = 0
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hdr = ''.join(chunk.header)
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if hdr in seen:
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consumefile()
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continue
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seen.add(hdr)
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if resp_all[0] is None:
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chunk.pretty(ui)
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r = prompt(_('examine changes to %s?') %
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_(' and ').join(map(repr, chunk.files())))
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if r:
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applied[chunk.filename()] = [chunk]
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if chunk.allhunks():
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applied[chunk.filename()] += consumefile()
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else:
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consumefile()
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else:
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# new hunk
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if resp_file[0] is None and resp_all[0] is None:
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chunk.pretty(ui)
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r = (total == 1
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and prompt(_('record this change to %r?') % chunk.filename())
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or prompt(_('record change %d/%d to %r?') %
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(pos, total, chunk.filename())))
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if r:
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if fixoffset:
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chunk = copy.copy(chunk)
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chunk.toline += fixoffset
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applied[chunk.filename()].append(chunk)
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else:
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fixoffset += chunk.removed - chunk.added
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return sum([h for h in applied.itervalues()
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if h[0].special() or len(h) > 1], [])
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def record(ui, repo, *pats, **opts):
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'''interactively select changes to commit
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If a list of files is omitted, all changes reported by :hg:`status`
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will be candidates for recording.
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See :hg:`help dates` for a list of formats valid for -d/--date.
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You will be prompted for whether to record changes to each
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modified file, and for files with multiple changes, for each
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change to use. For each query, the following responses are
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possible::
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y - record this change
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n - skip this change
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s - skip remaining changes to this file
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f - record remaining changes to this file
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d - done, skip remaining changes and files
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a - record all changes to all remaining files
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q - quit, recording no changes
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? - display help
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This command is not available when committing a merge.'''
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dorecord(ui, repo, commands.commit, *pats, **opts)
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def qrecord(ui, repo, patch, *pats, **opts):
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'''interactively record a new patch
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See :hg:`help qnew` & :hg:`help record` for more information and
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usage.
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'''
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try:
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mq = extensions.find('mq')
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except KeyError:
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raise util.Abort(_("'mq' extension not loaded"))
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def committomq(ui, repo, *pats, **opts):
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mq.new(ui, repo, patch, *pats, **opts)
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opts = opts.copy()
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opts['force'] = True # always 'qnew -f'
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dorecord(ui, repo, committomq, *pats, **opts)
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def dorecord(ui, repo, commitfunc, *pats, **opts):
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if not ui.interactive():
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raise util.Abort(_('running non-interactively, use commit instead'))
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def recordfunc(ui, repo, message, match, opts):
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"""This is generic record driver.
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Its job is to interactively filter local changes, and accordingly
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prepare working dir into a state, where the job can be delegated to
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non-interactive commit command such as 'commit' or 'qrefresh'.
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After the actual job is done by non-interactive command, working dir
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state is restored to original.
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In the end we'll record interesting changes, and everything else will be
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left in place, so the user can continue his work.
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"""
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merge = len(repo[None].parents()) > 1
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if merge:
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raise util.Abort(_('cannot partially commit a merge '
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'(use "hg commit" instead)'))
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changes = repo.status(match=match)[:3]
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diffopts = mdiff.diffopts(git=True, nodates=True)
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chunks = patch.diff(repo, changes=changes, opts=diffopts)
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fp = cStringIO.StringIO()
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fp.write(''.join(chunks))
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fp.seek(0)
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# 1. filter patch, so we have intending-to apply subset of it
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chunks = filterpatch(ui, parsepatch(fp))
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del fp
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contenders = set()
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for h in chunks:
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try:
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contenders.update(set(h.files()))
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except AttributeError:
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pass
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changed = changes[0] + changes[1] + changes[2]
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newfiles = [f for f in changed if f in contenders]
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if not newfiles:
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ui.status(_('no changes to record\n'))
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return 0
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modified = set(changes[0])
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# 2. backup changed files, so we can restore them in the end
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backups = {}
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backupdir = repo.join('record-backups')
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try:
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os.mkdir(backupdir)
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except OSError, err:
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if err.errno != errno.EEXIST:
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raise
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try:
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# backup continues
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for f in newfiles:
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if f not in modified:
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continue
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fd, tmpname = tempfile.mkstemp(prefix=f.replace('/', '_')+'.',
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dir=backupdir)
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os.close(fd)
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ui.debug('backup %r as %r\n' % (f, tmpname))
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util.copyfile(repo.wjoin(f), tmpname)
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shutil.copystat(repo.wjoin(f), tmpname)
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backups[f] = tmpname
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fp = cStringIO.StringIO()
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for c in chunks:
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if c.filename() in backups:
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c.write(fp)
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dopatch = fp.tell()
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fp.seek(0)
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# 3a. apply filtered patch to clean repo (clean)
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if backups:
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hg.revert(repo, repo.dirstate.parents()[0],
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lambda key: key in backups)
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# 3b. (apply)
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if dopatch:
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try:
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ui.debug('applying patch\n')
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ui.debug(fp.getvalue())
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pfiles = {}
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patch.internalpatch(fp, ui, 1, repo.root, files=pfiles,
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eolmode=None)
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cmdutil.updatedir(ui, repo, pfiles)
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except patch.PatchError, err:
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raise util.Abort(str(err))
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del fp
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# 4. We prepared working directory according to filtered patch.
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# Now is the time to delegate the job to commit/qrefresh or the like!
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# it is important to first chdir to repo root -- we'll call a
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# highlevel command with list of pathnames relative to repo root
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cwd = os.getcwd()
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os.chdir(repo.root)
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try:
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commitfunc(ui, repo, *newfiles, **opts)
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finally:
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os.chdir(cwd)
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return 0
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finally:
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# 5. finally restore backed-up files
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try:
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for realname, tmpname in backups.iteritems():
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ui.debug('restoring %r to %r\n' % (tmpname, realname))
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util.copyfile(tmpname, repo.wjoin(realname))
|
|
# Our calls to copystat() here and above are a
|
|
# hack to trick any editors that have f open that
|
|
# we haven't modified them.
|
|
#
|
|
# Also note that this racy as an editor could
|
|
# notice the file's mtime before we've finished
|
|
# writing it.
|
|
shutil.copystat(tmpname, repo.wjoin(realname))
|
|
os.unlink(tmpname)
|
|
os.rmdir(backupdir)
|
|
except OSError:
|
|
pass
|
|
|
|
# wrap ui.write so diff output can be labeled/colorized
|
|
def wrapwrite(orig, *args, **kw):
|
|
label = kw.pop('label', '')
|
|
for chunk, l in patch.difflabel(lambda: args):
|
|
orig(chunk, label=label + l)
|
|
oldwrite = ui.write
|
|
extensions.wrapfunction(ui, 'write', wrapwrite)
|
|
try:
|
|
return cmdutil.commit(ui, repo, recordfunc, pats, opts)
|
|
finally:
|
|
ui.write = oldwrite
|
|
|
|
cmdtable = {
|
|
"record":
|
|
(record,
|
|
|
|
# add commit options
|
|
commands.table['^commit|ci'][1],
|
|
|
|
_('hg record [OPTION]... [FILE]...')),
|
|
}
|
|
|
|
|
|
def uisetup(ui):
|
|
try:
|
|
mq = extensions.find('mq')
|
|
except KeyError:
|
|
return
|
|
|
|
qcmdtable = {
|
|
"qrecord":
|
|
(qrecord,
|
|
|
|
# add qnew options, except '--force'
|
|
[opt for opt in mq.cmdtable['^qnew'][1] if opt[1] != 'force'],
|
|
|
|
_('hg qrecord [OPTION]... PATCH [FILE]...')),
|
|
}
|
|
|
|
cmdtable.update(qcmdtable)
|
|
|