# record.py
#
# Copyright 2007 Bryan O'Sullivan <bos@serpentine.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
'''commands to interactively select changes for commit/qrefresh'''
from mercurial.i18n import gettext, _
from mercurial import cmdutil, commands, extensions, hg, mdiff, patch
from mercurial import util
import copy, cStringIO, errno, os, re, shutil, tempfile
lines_re = re.compile(r'@@ -(\d+),(\d+) \+(\d+),(\d+) @@\s*(.*)')
def scanpatch(fp):
"""like patch.iterhunks, but yield different events
- ('file', [header_lines + fromfile + tofile])
- ('context', [context_lines])
- ('hunk', [hunk_lines])
- ('range', (-start,len, +start,len, diffp))
"""
lr = patch.linereader(fp)
def scanwhile(first, p):
"""scan lr while predicate holds"""
lines = [first]
while True:
line = lr.readline()
if not line:
break
if p(line):
lines.append(line)
else:
lr.push(line)
break
return lines
while True:
line = lr.readline()
if not line:
break
if line.startswith('diff --git a/') or line.startswith('diff -r '):
def notheader(line):
s = line.split(None, 1)
return not s or s[0] not in ('---', 'diff')
header = scanwhile(line, notheader)
fromfile = lr.readline()
if fromfile.startswith('---'):
tofile = lr.readline()
header += [fromfile, tofile]
else:
lr.push(fromfile)
yield 'file', header
elif line[0] == ' ':
yield 'context', scanwhile(line, lambda l: l[0] in ' \\')
elif line[0] in '-+':
yield 'hunk', scanwhile(line, lambda l: l[0] in '-+\\')
else:
m = lines_re.match(line)
if m:
yield 'range', m.groups()
else:
raise patch.PatchError('unknown patch content: %r' % line)
class header(object):
"""patch header
XXX shoudn't we move this to mercurial/patch.py ?
"""
diffgit_re = re.compile('diff --git a/(.*) b/(.*)$')
diff_re = re.compile('diff -r .* (.*)$')
allhunks_re = re.compile('(?:index|new file|deleted file) ')
pretty_re = re.compile('(?:new file|deleted file) ')
special_re = re.compile('(?:index|new|deleted|copy|rename) ')
def __init__(self, header):
self.header = header
self.hunks = []
def binary(self):
return util.any(h.startswith('index ') for h in self.header)
def pretty(self, fp):
for h in self.header:
if h.startswith('index '):
fp.write(_('this modifies a binary file (all or nothing)\n'))
break
if self.pretty_re.match(h):
fp.write(h)
if self.binary():
fp.write(_('this is a binary file\n'))
break
if h.startswith('---'):
fp.write(_('%d hunks, %d lines changed\n') %
(len(self.hunks),
sum([max(h.added, h.removed) for h in self.hunks])))
break
fp.write(h)
def write(self, fp):
fp.write(''.join(self.header))
def allhunks(self):
return util.any(self.allhunks_re.match(h) for h in self.header)
def files(self):
match = self.diffgit_re.match(self.header[0])
if match:
fromfile, tofile = match.groups()
if fromfile == tofile:
return [fromfile]
return [fromfile, tofile]
else:
return self.diff_re.match(self.header[0]).groups()
def filename(self):
return self.files()[-1]
def __repr__(self):
return '<header %s>' % (' '.join(map(repr, self.files())))
def special(self):
return util.any(self.special_re.match(h) for h in self.header)
def countchanges(hunk):
"""hunk -> (n+,n-)"""
add = len([h for h in hunk if h[0] == '+'])
rem = len([h for h in hunk if h[0] == '-'])
return add, rem
class hunk(object):
"""patch hunk
XXX shouldn't we merge this with patch.hunk ?
"""
maxcontext = 3
def __init__(self, header, fromline, toline, proc, before, hunk, after):
def trimcontext(number, lines):
delta = len(lines) - self.maxcontext
if False and delta > 0:
return number + delta, lines[:self.maxcontext]
return number, lines
self.header = header
self.fromline, self.before = trimcontext(fromline, before)
self.toline, self.after = trimcontext(toline, after)
self.proc = proc
self.hunk = hunk
self.added, self.removed = countchanges(self.hunk)
def write(self, fp):
delta = len(self.before) + len(self.after)
if self.after and self.after[-1] == '\\ No newline at end of file\n':
delta -= 1
fromlen = delta + self.removed
tolen = delta + self.added
fp.write('@@ -%d,%d +%d,%d @@%s\n' %
(self.fromline, fromlen, self.toline, tolen,
self.proc and (' ' + self.proc)))
fp.write(''.join(self.before + self.hunk + self.after))
pretty = write
def filename(self):
return self.header.filename()
def __repr__(self):
return '<hunk %r@%d>' % (self.filename(), self.fromline)
def parsepatch(fp):
"""patch -> [] of headers -> [] of hunks """
class parser(object):
"""patch parsing state machine"""
def __init__(self):
self.fromline = 0
self.toline = 0
self.proc = ''
self.header = None
self.context = []
self.before = []
self.hunk = []
self.headers = []
def addrange(self, limits):
fromstart, fromend, tostart, toend, proc = limits
self.fromline = int(fromstart)
self.toline = int(tostart)
self.proc = proc
def addcontext(self, context):
if self.hunk:
h = hunk(self.header, self.fromline, self.toline, self.proc,
self.before, self.hunk, context)
self.header.hunks.append(h)
self.fromline += len(self.before) + h.removed
self.toline += len(self.before) + h.added
self.before = []
self.hunk = []
self.proc = ''
self.context = context
def addhunk(self, hunk):
if self.context:
self.before = self.context
self.context = []
self.hunk = hunk
def newfile(self, hdr):
self.addcontext([])
h = header(hdr)
self.headers.append(h)
self.header = h
def finished(self):
self.addcontext([])
return self.headers
transitions = {
'file': {'context': addcontext,
'file': newfile,
'hunk': addhunk,
'range': addrange},
'context': {'file': newfile,
'hunk': addhunk,
'range': addrange},
'hunk': {'context': addcontext,
'file': newfile,
'range': addrange},
'range': {'context': addcontext,
'hunk': addhunk},
}
p = parser()
state = 'context'
for newstate, data in scanpatch(fp):
try:
p.transitions[state][newstate](p, data)
except KeyError:
raise patch.PatchError('unhandled transition: %s -> %s' %
(state, newstate))
state = newstate
return p.finished()
def filterpatch(ui, headers):
"""Interactively filter patch chunks into applied-only chunks"""
def prompt(skipfile, skipall, query):
"""prompt query, and process base inputs
- y/n for the rest of file
- y/n for the rest
- ? (help)
- q (quit)
Return True/False and possibly updated skipfile and skipall.
"""
if skipall is not None:
return skipall, skipfile, skipall
if skipfile is not None:
return skipfile, skipfile, skipall
while True:
resps = _('[Ynsfdaq?]')
choices = (_('&Yes, record this change'),
_('&No, skip this change'),
_('&Skip remaining changes to this file'),
_('Record remaining changes to this &file'),
_('&Done, skip remaining changes and files'),
_('Record &all changes to all remaining files'),
_('&Quit, recording no changes'),
_('&?'))
r = ui.promptchoice("%s %s" % (query, resps), choices)
ui.write("\n")
if r == 7: # ?
doc = gettext(record.__doc__)
c = doc.find('::') + 2
for l in doc[c:].splitlines():
if l.startswith(' '):
ui.write(l.strip(), '\n')
continue
elif r == 0: # yes
ret = True
elif r == 1: # no
ret = False
elif r == 2: # Skip
ret = skipfile = False
elif r == 3: # file (Record remaining)
ret = skipfile = True
elif r == 4: # done, skip remaining
ret = skipall = False
elif r == 5: # all
ret = skipall = True
elif r == 6: # quit
raise util.Abort(_('user quit'))
return ret, skipfile, skipall
seen = set()
applied = {} # 'filename' -> [] of chunks
skipfile, skipall = None, None
pos, total = 1, sum(len(h.hunks) for h in headers)
for h in headers:
pos += len(h.hunks)
skipfile = None
fixoffset = 0
hdr = ''.join(h.header)
if hdr in seen:
continue
seen.add(hdr)
if skipall is None:
h.pretty(ui)
msg = (_('examine changes to %s?') %
_(' and ').join(map(repr, h.files())))
r, skipfile, skipall = prompt(skipfile, skipall, msg)
if not r:
continue
applied[h.filename()] = [h]
if h.allhunks():
applied[h.filename()] += h.hunks
continue
for i, chunk in enumerate(h.hunks):
if skipfile is None and skipall is None:
chunk.pretty(ui)
msg = (total == 1
and (_('record this change to %r?') % chunk.filename())
or (_('record change %d/%d to %r?') %
(pos - len(h.hunks) + i, total, chunk.filename())))
r, skipfile, skipall = prompt(skipfile, skipall, msg)
if r:
if fixoffset:
chunk = copy.copy(chunk)
chunk.toline += fixoffset
applied[chunk.filename()].append(chunk)
else:
fixoffset += chunk.removed - chunk.added
return sum([h for h in applied.itervalues()
if h[0].special() or len(h) > 1], [])
def record(ui, repo, *pats, **opts):
'''interactively select changes to commit
If a list of files is omitted, all changes reported by :hg:`status`
will be candidates for recording.
See :hg:`help dates` for a list of formats valid for -d/--date.
You will be prompted for whether to record changes to each
modified file, and for files with multiple changes, for each
change to use. For each query, the following responses are
possible::
y - record this change
n - skip this change
s - skip remaining changes to this file
f - record remaining changes to this file
d - done, skip remaining changes and files
a - record all changes to all remaining files
q - quit, recording no changes
? - display help
This command is not available when committing a merge.'''
dorecord(ui, repo, commands.commit, *pats, **opts)
def qrecord(ui, repo, patch, *pats, **opts):
'''interactively record a new patch
See :hg:`help qnew` & :hg:`help record` for more information and
usage.
'''
try:
mq = extensions.find('mq')
except KeyError:
raise util.Abort(_("'mq' extension not loaded"))
def committomq(ui, repo, *pats, **opts):
mq.new(ui, repo, patch, *pats, **opts)
dorecord(ui, repo, committomq, *pats, **opts)
def dorecord(ui, repo, commitfunc, *pats, **opts):
if not ui.interactive():
raise util.Abort(_('running non-interactively, use commit instead'))
def recordfunc(ui, repo, message, match, opts):
"""This is generic record driver.
Its job is to interactively filter local changes, and
accordingly prepare working directory into a state in which the
job can be delegated to a non-interactive commit command such as
'commit' or 'qrefresh'.
After the actual job is done by non-interactive command, the
working directory is restored to its original state.
In the end we'll record interesting changes, and everything else
will be left in place, so the user can continue working.
"""
merge = len(repo[None].parents()) > 1
if merge:
raise util.Abort(_('cannot partially commit a merge '
'(use "hg commit" instead)'))
changes = repo.status(match=match)[:3]
diffopts = mdiff.diffopts(git=True, nodates=True)
chunks = patch.diff(repo, changes=changes, opts=diffopts)
fp = cStringIO.StringIO()
fp.write(''.join(chunks))
fp.seek(0)
# 1. filter patch, so we have intending-to apply subset of it
chunks = filterpatch(ui, parsepatch(fp))
del fp
contenders = set()
for h in chunks:
try:
contenders.update(set(h.files()))
except AttributeError:
pass
changed = changes[0] + changes[1] + changes[2]
newfiles = [f for f in changed if f in contenders]
if not newfiles:
ui.status(_('no changes to record\n'))
return 0
modified = set(changes[0])
# 2. backup changed files, so we can restore them in the end
backups = {}
backupdir = repo.join('record-backups')
try:
os.mkdir(backupdir)
except OSError, err:
if err.errno != errno.EEXIST:
raise
try:
# backup continues
for f in newfiles:
if f not in modified:
continue
fd, tmpname = tempfile.mkstemp(prefix=f.replace('/', '_')+'.',
dir=backupdir)
os.close(fd)
ui.debug('backup %r as %r\n' % (f, tmpname))
util.copyfile(repo.wjoin(f), tmpname)
shutil.copystat(repo.wjoin(f), tmpname)
backups[f] = tmpname
fp = cStringIO.StringIO()
for c in chunks:
if c.filename() in backups:
c.write(fp)
dopatch = fp.tell()
fp.seek(0)
# 3a. apply filtered patch to clean repo (clean)
if backups:
hg.revert(repo, repo.dirstate.parents()[0],
lambda key: key in backups)
# 3b. (apply)
if dopatch:
try:
ui.debug('applying patch\n')
ui.debug(fp.getvalue())
pfiles = {}
patch.internalpatch(fp, ui, 1, repo.root, files=pfiles,
eolmode=None)
cmdutil.updatedir(ui, repo, pfiles)
except patch.PatchError, err:
raise util.Abort(str(err))
del fp
# 4. We prepared working directory according to filtered
# patch. Now is the time to delegate the job to
# commit/qrefresh or the like!
# it is important to first chdir to repo root -- we'll call
# a highlevel command with list of pathnames relative to
# repo root
cwd = os.getcwd()
os.chdir(repo.root)
try:
commitfunc(ui, repo, *newfiles, **opts)
finally:
os.chdir(cwd)
return 0
finally:
# 5. finally restore backed-up files
try:
for realname, tmpname in backups.iteritems():
ui.debug('restoring %r to %r\n' % (tmpname, realname))
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, commands.table['^commit|ci'][1], # same options as commit
_('hg record [OPTION]... [FILE]...')),
}
def uisetup(ui):
try:
mq = extensions.find('mq')
except KeyError:
return
qcmdtable = {
"qrecord":
(qrecord, mq.cmdtable['^qnew'][1], # same options as qnew
_('hg qrecord [OPTION]... PATCH [FILE]...')),
}
cmdtable.update(qcmdtable)