Mercurial > hg-stable
view mercurial/patch.py @ 37789:bfd32db06952 stable
Added tag 4.6rc0 for changeset ed5448edcbfa
| author | Augie Fackler <raf@durin42.com> |
|---|---|
| date | Wed, 18 Apr 2018 15:39:21 -0400 |
| parents | 5e67c20915a7 |
| children | 72f6498c040b |
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# patch.py - patch file parsing routines # # Copyright 2006 Brendan Cully <brendan@kublai.com> # Copyright 2007 Chris Mason <chris.mason@oracle.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import, print_function import collections import contextlib import copy import email import errno import hashlib import os import posixpath import re import shutil import tempfile import zlib from .i18n import _ from .node import ( hex, short, ) from . import ( copies, diffhelpers, encoding, error, mail, mdiff, pathutil, pycompat, scmutil, similar, util, vfs as vfsmod, ) from .utils import ( dateutil, procutil, stringutil, ) stringio = util.stringio gitre = re.compile(br'diff --git a/(.*) b/(.*)') tabsplitter = re.compile(br'(\t+|[^\t]+)') wordsplitter = re.compile(br'(\t+| +|[a-zA-Z0-9_\x80-\xff]+|' '[^ \ta-zA-Z0-9_\x80-\xff])') PatchError = error.PatchError # public functions def split(stream): '''return an iterator of individual patches from a stream''' def isheader(line, inheader): if inheader and line.startswith((' ', '\t')): # continuation return True if line.startswith((' ', '-', '+')): # diff line - don't check for header pattern in there return False l = line.split(': ', 1) return len(l) == 2 and ' ' not in l[0] def chunk(lines): return stringio(''.join(lines)) def hgsplit(stream, cur): inheader = True for line in stream: if not line.strip(): inheader = False if not inheader and line.startswith('# HG changeset patch'): yield chunk(cur) cur = [] inheader = True cur.append(line) if cur: yield chunk(cur) def mboxsplit(stream, cur): for line in stream: if line.startswith('From '): for c in split(chunk(cur[1:])): yield c cur = [] cur.append(line) if cur: for c in split(chunk(cur[1:])): yield c def mimesplit(stream, cur): def msgfp(m): fp = stringio() g = email.Generator.Generator(fp, mangle_from_=False) g.flatten(m) fp.seek(0) return fp for line in stream: cur.append(line) c = chunk(cur) m = pycompat.emailparser().parse(c) if not m.is_multipart(): yield msgfp(m) else: ok_types = ('text/plain', 'text/x-diff', 'text/x-patch') for part in m.walk(): ct = part.get_content_type() if ct not in ok_types: continue yield msgfp(part) def headersplit(stream, cur): inheader = False for line in stream: if not inheader and isheader(line, inheader): yield chunk(cur) cur = [] inheader = True if inheader and not isheader(line, inheader): inheader = False cur.append(line) if cur: yield chunk(cur) def remainder(cur): yield chunk(cur) class fiter(object): def __init__(self, fp): self.fp = fp def __iter__(self): return self def next(self): l = self.fp.readline() if not l: raise StopIteration return l __next__ = next inheader = False cur = [] mimeheaders = ['content-type'] if not util.safehasattr(stream, 'next'): # http responses, for example, have readline but not next stream = fiter(stream) for line in stream: cur.append(line) if line.startswith('# HG changeset patch'): return hgsplit(stream, cur) elif line.startswith('From '): return mboxsplit(stream, cur) elif isheader(line, inheader): inheader = True if line.split(':', 1)[0].lower() in mimeheaders: # let email parser handle this return mimesplit(stream, cur) elif line.startswith('--- ') and inheader: # No evil headers seen by diff start, split by hand return headersplit(stream, cur) # Not enough info, keep reading # if we are here, we have a very plain patch return remainder(cur) ## Some facility for extensible patch parsing: # list of pairs ("header to match", "data key") patchheadermap = [('Date', 'date'), ('Branch', 'branch'), ('Node ID', 'nodeid'), ] @contextlib.contextmanager def extract(ui, fileobj): '''extract patch from data read from fileobj. patch can be a normal patch or contained in an email message. return a dictionary. Standard keys are: - filename, - message, - user, - date, - branch, - node, - p1, - p2. Any item can be missing from the dictionary. If filename is missing, fileobj did not contain a patch. Caller must unlink filename when done.''' fd, tmpname = tempfile.mkstemp(prefix='hg-patch-') tmpfp = os.fdopen(fd, r'wb') try: yield _extract(ui, fileobj, tmpname, tmpfp) finally: tmpfp.close() os.unlink(tmpname) def _extract(ui, fileobj, tmpname, tmpfp): # attempt to detect the start of a patch # (this heuristic is borrowed from quilt) diffre = re.compile(br'^(?:Index:[ \t]|diff[ \t]-|RCS file: |' br'retrieving revision [0-9]+(\.[0-9]+)*$|' br'---[ \t].*?^\+\+\+[ \t]|' br'\*\*\*[ \t].*?^---[ \t])', re.MULTILINE | re.DOTALL) data = {} msg = pycompat.emailparser().parse(fileobj) subject = msg[r'Subject'] and mail.headdecode(msg[r'Subject']) data['user'] = msg[r'From'] and mail.headdecode(msg[r'From']) if not subject and not data['user']: # Not an email, restore parsed headers if any subject = '\n'.join(': '.join(map(encoding.strtolocal, h)) for h in msg.items()) + '\n' # should try to parse msg['Date'] parents = [] if subject: if subject.startswith('[PATCH'): pend = subject.find(']') if pend >= 0: subject = subject[pend + 1:].lstrip() subject = re.sub(br'\n[ \t]+', ' ', subject) ui.debug('Subject: %s\n' % subject) if data['user']: ui.debug('From: %s\n' % data['user']) diffs_seen = 0 ok_types = ('text/plain', 'text/x-diff', 'text/x-patch') message = '' for part in msg.walk(): content_type = pycompat.bytestr(part.get_content_type()) ui.debug('Content-Type: %s\n' % content_type) if content_type not in ok_types: continue payload = part.get_payload(decode=True) m = diffre.search(payload) if m: hgpatch = False hgpatchheader = False ignoretext = False ui.debug('found patch at byte %d\n' % m.start(0)) diffs_seen += 1 cfp = stringio() for line in payload[:m.start(0)].splitlines(): if line.startswith('# HG changeset patch') and not hgpatch: ui.debug('patch generated by hg export\n') hgpatch = True hgpatchheader = True # drop earlier commit message content cfp.seek(0) cfp.truncate() subject = None elif hgpatchheader: if line.startswith('# User '): data['user'] = line[7:] ui.debug('From: %s\n' % data['user']) elif line.startswith("# Parent "): parents.append(line[9:].lstrip()) elif line.startswith("# "): for header, key in patchheadermap: prefix = '# %s ' % header if line.startswith(prefix): data[key] = line[len(prefix):] else: hgpatchheader = False elif line == '---': ignoretext = True if not hgpatchheader and not ignoretext: cfp.write(line) cfp.write('\n') message = cfp.getvalue() if tmpfp: tmpfp.write(payload) if not payload.endswith('\n'): tmpfp.write('\n') elif not diffs_seen and message and content_type == 'text/plain': message += '\n' + payload if subject and not message.startswith(subject): message = '%s\n%s' % (subject, message) data['message'] = message tmpfp.close() if parents: data['p1'] = parents.pop(0) if parents: data['p2'] = parents.pop(0) if diffs_seen: data['filename'] = tmpname return data class patchmeta(object): """Patched file metadata 'op' is the performed operation within ADD, DELETE, RENAME, MODIFY or COPY. 'path' is patched file path. 'oldpath' is set to the origin file when 'op' is either COPY or RENAME, None otherwise. If file mode is changed, 'mode' is a tuple (islink, isexec) where 'islink' is True if the file is a symlink and 'isexec' is True if the file is executable. Otherwise, 'mode' is None. """ def __init__(self, path): self.path = path self.oldpath = None self.mode = None self.op = 'MODIFY' self.binary = False def setmode(self, mode): islink = mode & 0o20000 isexec = mode & 0o100 self.mode = (islink, isexec) def copy(self): other = patchmeta(self.path) other.oldpath = self.oldpath other.mode = self.mode other.op = self.op other.binary = self.binary return other def _ispatchinga(self, afile): if afile == '/dev/null': return self.op == 'ADD' return afile == 'a/' + (self.oldpath or self.path) def _ispatchingb(self, bfile): if bfile == '/dev/null': return self.op == 'DELETE' return bfile == 'b/' + self.path def ispatching(self, afile, bfile): return self._ispatchinga(afile) and self._ispatchingb(bfile) def __repr__(self): return "<patchmeta %s %r>" % (self.op, self.path) def readgitpatch(lr): """extract git-style metadata about patches from <patchname>""" # Filter patch for git information gp = None gitpatches = [] for line in lr: line = line.rstrip(' \r\n') if line.startswith('diff --git a/'): m = gitre.match(line) if m: if gp: gitpatches.append(gp) dst = m.group(2) gp = patchmeta(dst) elif gp: if line.startswith('--- '): gitpatches.append(gp) gp = None continue if line.startswith('rename from '): gp.op = 'RENAME' gp.oldpath = line[12:] elif line.startswith('rename to '): gp.path = line[10:] elif line.startswith('copy from '): gp.op = 'COPY' gp.oldpath = line[10:] elif line.startswith('copy to '): gp.path = line[8:] elif line.startswith('deleted file'): gp.op = 'DELETE' elif line.startswith('new file mode '): gp.op = 'ADD' gp.setmode(int(line[-6:], 8)) elif line.startswith('new mode '): gp.setmode(int(line[-6:], 8)) elif line.startswith('GIT binary patch'): gp.binary = True if gp: gitpatches.append(gp) return gitpatches class linereader(object): # simple class to allow pushing lines back into the input stream def __init__(self, fp): self.fp = fp self.buf = [] def push(self, line): if line is not None: self.buf.append(line) def readline(self): if self.buf: l = self.buf[0] del self.buf[0] return l return self.fp.readline() def __iter__(self): return iter(self.readline, '') class abstractbackend(object): def __init__(self, ui): self.ui = ui def getfile(self, fname): """Return target file data and flags as a (data, (islink, isexec)) tuple. Data is None if file is missing/deleted. """ raise NotImplementedError def setfile(self, fname, data, mode, copysource): """Write data to target file fname and set its mode. mode is a (islink, isexec) tuple. If data is None, the file content should be left unchanged. If the file is modified after being copied, copysource is set to the original file name. """ raise NotImplementedError def unlink(self, fname): """Unlink target file.""" raise NotImplementedError def writerej(self, fname, failed, total, lines): """Write rejected lines for fname. total is the number of hunks which failed to apply and total the total number of hunks for this files. """ def exists(self, fname): raise NotImplementedError def close(self): raise NotImplementedError class fsbackend(abstractbackend): def __init__(self, ui, basedir): super(fsbackend, self).__init__(ui) self.opener = vfsmod.vfs(basedir) def getfile(self, fname): if self.opener.islink(fname): return (self.opener.readlink(fname), (True, False)) isexec = False try: isexec = self.opener.lstat(fname).st_mode & 0o100 != 0 except OSError as e: if e.errno != errno.ENOENT: raise try: return (self.opener.read(fname), (False, isexec)) except IOError as e: if e.errno != errno.ENOENT: raise return None, None def setfile(self, fname, data, mode, copysource): islink, isexec = mode if data is None: self.opener.setflags(fname, islink, isexec) return if islink: self.opener.symlink(data, fname) else: self.opener.write(fname, data) if isexec: self.opener.setflags(fname, False, True) def unlink(self, fname): self.opener.unlinkpath(fname, ignoremissing=True) def writerej(self, fname, failed, total, lines): fname = fname + ".rej" self.ui.warn( _("%d out of %d hunks FAILED -- saving rejects to file %s\n") % (failed, total, fname)) fp = self.opener(fname, 'w') fp.writelines(lines) fp.close() def exists(self, fname): return self.opener.lexists(fname) class workingbackend(fsbackend): def __init__(self, ui, repo, similarity): super(workingbackend, self).__init__(ui, repo.root) self.repo = repo self.similarity = similarity self.removed = set() self.changed = set() self.copied = [] def _checkknown(self, fname): if self.repo.dirstate[fname] == '?' and self.exists(fname): raise PatchError(_('cannot patch %s: file is not tracked') % fname) def setfile(self, fname, data, mode, copysource): self._checkknown(fname) super(workingbackend, self).setfile(fname, data, mode, copysource) if copysource is not None: self.copied.append((copysource, fname)) self.changed.add(fname) def unlink(self, fname): self._checkknown(fname) super(workingbackend, self).unlink(fname) self.removed.add(fname) self.changed.add(fname) def close(self): wctx = self.repo[None] changed = set(self.changed) for src, dst in self.copied: scmutil.dirstatecopy(self.ui, self.repo, wctx, src, dst) if self.removed: wctx.forget(sorted(self.removed)) for f in self.removed: if f not in self.repo.dirstate: # File was deleted and no longer belongs to the # dirstate, it was probably marked added then # deleted, and should not be considered by # marktouched(). changed.discard(f) if changed: scmutil.marktouched(self.repo, changed, self.similarity) return sorted(self.changed) class filestore(object): def __init__(self, maxsize=None): self.opener = None self.files = {} self.created = 0 self.maxsize = maxsize if self.maxsize is None: self.maxsize = 4*(2**20) self.size = 0 self.data = {} def setfile(self, fname, data, mode, copied=None): if self.maxsize < 0 or (len(data) + self.size) <= self.maxsize: self.data[fname] = (data, mode, copied) self.size += len(data) else: if self.opener is None: root = tempfile.mkdtemp(prefix='hg-patch-') self.opener = vfsmod.vfs(root) # Avoid filename issues with these simple names fn = '%d' % self.created self.opener.write(fn, data) self.created += 1 self.files[fname] = (fn, mode, copied) def getfile(self, fname): if fname in self.data: return self.data[fname] if not self.opener or fname not in self.files: return None, None, None fn, mode, copied = self.files[fname] return self.opener.read(fn), mode, copied def close(self): if self.opener: shutil.rmtree(self.opener.base) class repobackend(abstractbackend): def __init__(self, ui, repo, ctx, store): super(repobackend, self).__init__(ui) self.repo = repo self.ctx = ctx self.store = store self.changed = set() self.removed = set() self.copied = {} def _checkknown(self, fname): if fname not in self.ctx: raise PatchError(_('cannot patch %s: file is not tracked') % fname) def getfile(self, fname): try: fctx = self.ctx[fname] except error.LookupError: return None, None flags = fctx.flags() return fctx.data(), ('l' in flags, 'x' in flags) def setfile(self, fname, data, mode, copysource): if copysource: self._checkknown(copysource) if data is None: data = self.ctx[fname].data() self.store.setfile(fname, data, mode, copysource) self.changed.add(fname) if copysource: self.copied[fname] = copysource def unlink(self, fname): self._checkknown(fname) self.removed.add(fname) def exists(self, fname): return fname in self.ctx def close(self): return self.changed | self.removed # @@ -start,len +start,len @@ or @@ -start +start @@ if len is 1 unidesc = re.compile('@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@') contextdesc = re.compile('(?:---|\*\*\*) (\d+)(?:,(\d+))? (?:---|\*\*\*)') eolmodes = ['strict', 'crlf', 'lf', 'auto'] class patchfile(object): def __init__(self, ui, gp, backend, store, eolmode='strict'): self.fname = gp.path self.eolmode = eolmode self.eol = None self.backend = backend self.ui = ui self.lines = [] self.exists = False self.missing = True self.mode = gp.mode self.copysource = gp.oldpath self.create = gp.op in ('ADD', 'COPY', 'RENAME') self.remove = gp.op == 'DELETE' if self.copysource is None: data, mode = backend.getfile(self.fname) else: data, mode = store.getfile(self.copysource)[:2] if data is not None: self.exists = self.copysource is None or backend.exists(self.fname) self.missing = False if data: self.lines = mdiff.splitnewlines(data) if self.mode is None: self.mode = mode if self.lines: # Normalize line endings if self.lines[0].endswith('\r\n'): self.eol = '\r\n' elif self.lines[0].endswith('\n'): self.eol = '\n' if eolmode != 'strict': nlines = [] for l in self.lines: if l.endswith('\r\n'): l = l[:-2] + '\n' nlines.append(l) self.lines = nlines else: if self.create: self.missing = False if self.mode is None: self.mode = (False, False) if self.missing: self.ui.warn(_("unable to find '%s' for patching\n") % self.fname) self.ui.warn(_("(use '--prefix' to apply patch relative to the " "current directory)\n")) self.hash = {} self.dirty = 0 self.offset = 0 self.skew = 0 self.rej = [] self.fileprinted = False self.printfile(False) self.hunks = 0 def writelines(self, fname, lines, mode): if self.eolmode == 'auto': eol = self.eol elif self.eolmode == 'crlf': eol = '\r\n' else: eol = '\n' if self.eolmode != 'strict' and eol and eol != '\n': rawlines = [] for l in lines: if l and l[-1] == '\n': l = l[:-1] + eol rawlines.append(l) lines = rawlines self.backend.setfile(fname, ''.join(lines), mode, self.copysource) def printfile(self, warn): if self.fileprinted: return if warn or self.ui.verbose: self.fileprinted = True s = _("patching file %s\n") % self.fname if warn: self.ui.warn(s) else: self.ui.note(s) def findlines(self, l, linenum): # looks through the hash and finds candidate lines. The # result is a list of line numbers sorted based on distance # from linenum cand = self.hash.get(l, []) if len(cand) > 1: # resort our list of potentials forward then back. cand.sort(key=lambda x: abs(x - linenum)) return cand def write_rej(self): # our rejects are a little different from patch(1). This always # creates rejects in the same form as the original patch. A file # header is inserted so that you can run the reject through patch again # without having to type the filename. if not self.rej: return base = os.path.basename(self.fname) lines = ["--- %s\n+++ %s\n" % (base, base)] for x in self.rej: for l in x.hunk: lines.append(l) if l[-1:] != '\n': lines.append("\n\ No newline at end of file\n") self.backend.writerej(self.fname, len(self.rej), self.hunks, lines) def apply(self, h): if not h.complete(): raise PatchError(_("bad hunk #%d %s (%d %d %d %d)") % (h.number, h.desc, len(h.a), h.lena, len(h.b), h.lenb)) self.hunks += 1 if self.missing: self.rej.append(h) return -1 if self.exists and self.create: if self.copysource: self.ui.warn(_("cannot create %s: destination already " "exists\n") % self.fname) else: self.ui.warn(_("file %s already exists\n") % self.fname) self.rej.append(h) return -1 if isinstance(h, binhunk): if self.remove: self.backend.unlink(self.fname) else: l = h.new(self.lines) self.lines[:] = l self.offset += len(l) self.dirty = True return 0 horig = h if (self.eolmode in ('crlf', 'lf') or self.eolmode == 'auto' and self.eol): # If new eols are going to be normalized, then normalize # hunk data before patching. Otherwise, preserve input # line-endings. h = h.getnormalized() # fast case first, no offsets, no fuzz old, oldstart, new, newstart = h.fuzzit(0, False) oldstart += self.offset orig_start = oldstart # if there's skew we want to emit the "(offset %d lines)" even # when the hunk cleanly applies at start + skew, so skip the # fast case code if self.skew == 0 and diffhelpers.testhunk(old, self.lines, oldstart): if self.remove: self.backend.unlink(self.fname) else: self.lines[oldstart:oldstart + len(old)] = new self.offset += len(new) - len(old) self.dirty = True return 0 # ok, we couldn't match the hunk. Lets look for offsets and fuzz it self.hash = {} for x, s in enumerate(self.lines): self.hash.setdefault(s, []).append(x) for fuzzlen in xrange(self.ui.configint("patch", "fuzz") + 1): for toponly in [True, False]: old, oldstart, new, newstart = h.fuzzit(fuzzlen, toponly) oldstart = oldstart + self.offset + self.skew oldstart = min(oldstart, len(self.lines)) if old: cand = self.findlines(old[0][1:], oldstart) else: # Only adding lines with no or fuzzed context, just # take the skew in account cand = [oldstart] for l in cand: if not old or diffhelpers.testhunk(old, self.lines, l): self.lines[l : l + len(old)] = new self.offset += len(new) - len(old) self.skew = l - orig_start self.dirty = True offset = l - orig_start - fuzzlen if fuzzlen: msg = _("Hunk #%d succeeded at %d " "with fuzz %d " "(offset %d lines).\n") self.printfile(True) self.ui.warn(msg % (h.number, l + 1, fuzzlen, offset)) else: msg = _("Hunk #%d succeeded at %d " "(offset %d lines).\n") self.ui.note(msg % (h.number, l + 1, offset)) return fuzzlen self.printfile(True) self.ui.warn(_("Hunk #%d FAILED at %d\n") % (h.number, orig_start)) self.rej.append(horig) return -1 def close(self): if self.dirty: self.writelines(self.fname, self.lines, self.mode) self.write_rej() return len(self.rej) class header(object): """patch header """ diffgit_re = re.compile('diff --git a/(.*) b/(.*)$') diff_re = re.compile('diff -r .* (.*)$') allhunks_re = re.compile('(?:index|deleted file) ') pretty_re = re.compile('(?:new file|deleted file) ') special_re = re.compile('(?:index|deleted|copy|rename) ') newfile_re = re.compile('(?:new file)') def __init__(self, header): self.header = header self.hunks = [] def binary(self): return 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 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 isnewfile(self): return any(self.newfile_re.match(h) for h in self.header) def special(self): # Special files are shown only at the header level and not at the hunk # level for example a file that has been deleted is a special file. # The user cannot change the content of the operation, in the case of # the deleted file he has to take the deletion or not take it, he # cannot take some of it. # Newly added files are special if they are empty, they are not special # if they have some content as we want to be able to change it nocontent = len(self.header) == 2 emptynewfile = self.isnewfile() and nocontent return emptynewfile or \ any(self.special_re.match(h) for h in self.header) class recordhunk(object): """patch hunk XXX shouldn't we merge this with the other hunk class? """ def __init__(self, header, fromline, toline, proc, before, hunk, after, maxcontext=None): def trimcontext(lines, reverse=False): if maxcontext is not None: delta = len(lines) - maxcontext if delta > 0: if reverse: return delta, lines[delta:] else: return delta, lines[:maxcontext] return 0, lines self.header = header trimedbefore, self.before = trimcontext(before, True) self.fromline = fromline + trimedbefore self.toline = toline + trimedbefore _trimedafter, self.after = trimcontext(after, False) self.proc = proc self.hunk = hunk self.added, self.removed = self.countchanges(self.hunk) def __eq__(self, v): if not isinstance(v, recordhunk): return False return ((v.hunk == self.hunk) and (v.proc == self.proc) and (self.fromline == v.fromline) and (self.header.files() == v.header.files())) def __hash__(self): return hash((tuple(self.hunk), tuple(self.header.files()), self.fromline, self.proc)) def countchanges(self, hunk): """hunk -> (n+,n-)""" add = len([h for h in hunk if h.startswith('+')]) rem = len([h for h in hunk if h.startswith('-')]) return add, rem def reversehunk(self): """return another recordhunk which is the reverse of the hunk If this hunk is diff(A, B), the returned hunk is diff(B, A). To do that, swap fromline/toline and +/- signs while keep other things unchanged. """ m = {'+': '-', '-': '+', '\\': '\\'} hunk = ['%s%s' % (m[l[0:1]], l[1:]) for l in self.hunk] return recordhunk(self.header, self.toline, self.fromline, self.proc, self.before, hunk, self.after) 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 getmessages(): return { 'multiple': { 'apply': _("apply change %d/%d to '%s'?"), 'discard': _("discard change %d/%d to '%s'?"), 'record': _("record change %d/%d to '%s'?"), }, 'single': { 'apply': _("apply this change to '%s'?"), 'discard': _("discard this change to '%s'?"), 'record': _("record this change to '%s'?"), }, 'help': { 'apply': _('[Ynesfdaq?]' '$$ &Yes, apply this change' '$$ &No, skip this change' '$$ &Edit this change manually' '$$ &Skip remaining changes to this file' '$$ Apply remaining changes to this &file' '$$ &Done, skip remaining changes and files' '$$ Apply &all changes to all remaining files' '$$ &Quit, applying no changes' '$$ &? (display help)'), 'discard': _('[Ynesfdaq?]' '$$ &Yes, discard this change' '$$ &No, skip this change' '$$ &Edit this change manually' '$$ &Skip remaining changes to this file' '$$ Discard remaining changes to this &file' '$$ &Done, skip remaining changes and files' '$$ Discard &all changes to all remaining files' '$$ &Quit, discarding no changes' '$$ &? (display help)'), 'record': _('[Ynesfdaq?]' '$$ &Yes, record this change' '$$ &No, skip this change' '$$ &Edit this change manually' '$$ &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' '$$ &? (display help)'), } } def filterpatch(ui, headers, operation=None): """Interactively filter patch chunks into applied-only chunks""" messages = getmessages() if operation is None: operation = 'record' def prompt(skipfile, skipall, query, chunk): """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. """ newpatches = None if skipall is not None: return skipall, skipfile, skipall, newpatches if skipfile is not None: return skipfile, skipfile, skipall, newpatches while True: resps = messages['help'][operation] r = ui.promptchoice("%s %s" % (query, resps)) ui.write("\n") if r == 8: # ? for c, t in ui.extractchoices(resps)[1]: ui.write('%s - %s\n' % (c, encoding.lower(t))) continue elif r == 0: # yes ret = True elif r == 1: # no ret = False elif r == 2: # Edit patch if chunk is None: ui.write(_('cannot edit patch for whole file')) ui.write("\n") continue if chunk.header.binary(): ui.write(_('cannot edit patch for binary file')) ui.write("\n") continue # Patch comment based on the Git one (based on comment at end of # https://mercurial-scm.org/wiki/RecordExtension) phelp = '---' + _(""" To remove '-' lines, make them ' ' lines (context). To remove '+' lines, delete them. Lines starting with # will be removed from the patch. If the patch applies cleanly, the edited hunk will immediately be added to the record list. If it does not apply cleanly, a rejects file will be generated: you can use that when you try again. If all lines of the hunk are removed, then the edit is aborted and the hunk is left unchanged. """) (patchfd, patchfn) = tempfile.mkstemp(prefix="hg-editor-", suffix=".diff") ncpatchfp = None try: # Write the initial patch f = util.nativeeolwriter(os.fdopen(patchfd, r'wb')) chunk.header.write(f) chunk.write(f) f.write('\n'.join(['# ' + i for i in phelp.splitlines()])) f.close() # Start the editor and wait for it to complete editor = ui.geteditor() ret = ui.system("%s \"%s\"" % (editor, patchfn), environ={'HGUSER': ui.username()}, blockedtag='filterpatch') if ret != 0: ui.warn(_("editor exited with exit code %d\n") % ret) continue # Remove comment lines patchfp = open(patchfn, r'rb') ncpatchfp = stringio() for line in util.iterfile(patchfp): line = util.fromnativeeol(line) if not line.startswith('#'): ncpatchfp.write(line) patchfp.close() ncpatchfp.seek(0) newpatches = parsepatch(ncpatchfp) finally: os.unlink(patchfn) del ncpatchfp # Signal that the chunk shouldn't be applied as-is, but # provide the new patch to be used instead. ret = False elif r == 3: # Skip ret = skipfile = False elif r == 4: # file (Record remaining) ret = skipfile = True elif r == 5: # done, skip remaining ret = skipall = False elif r == 6: # all ret = skipall = True elif r == 7: # quit raise error.Abort(_('user quit')) return ret, skipfile, skipall, newpatches 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("'%s'" % f for f in h.files())) r, skipfile, skipall, np = prompt(skipfile, skipall, msg, None) 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) if total == 1: msg = messages['single'][operation] % chunk.filename() else: idx = pos - len(h.hunks) + i msg = messages['multiple'][operation] % (idx, total, chunk.filename()) r, skipfile, skipall, newpatches = prompt(skipfile, skipall, msg, chunk) if r: if fixoffset: chunk = copy.copy(chunk) chunk.toline += fixoffset applied[chunk.filename()].append(chunk) elif newpatches is not None: for newpatch in newpatches: for newhunk in newpatch.hunks: if fixoffset: newhunk.toline += fixoffset applied[newhunk.filename()].append(newhunk) else: fixoffset += chunk.removed - chunk.added return (sum([h for h in applied.itervalues() if h[0].special() or len(h) > 1], []), {}) class hunk(object): def __init__(self, desc, num, lr, context): self.number = num self.desc = desc self.hunk = [desc] self.a = [] self.b = [] self.starta = self.lena = None self.startb = self.lenb = None if lr is not None: if context: self.read_context_hunk(lr) else: self.read_unified_hunk(lr) def getnormalized(self): """Return a copy with line endings normalized to LF.""" def normalize(lines): nlines = [] for line in lines: if line.endswith('\r\n'): line = line[:-2] + '\n' nlines.append(line) return nlines # Dummy object, it is rebuilt manually nh = hunk(self.desc, self.number, None, None) nh.number = self.number nh.desc = self.desc nh.hunk = self.hunk nh.a = normalize(self.a) nh.b = normalize(self.b) nh.starta = self.starta nh.startb = self.startb nh.lena = self.lena nh.lenb = self.lenb return nh def read_unified_hunk(self, lr): m = unidesc.match(self.desc) if not m: raise PatchError(_("bad hunk #%d") % self.number) self.starta, self.lena, self.startb, self.lenb = m.groups() if self.lena is None: self.lena = 1 else: self.lena = int(self.lena) if self.lenb is None: self.lenb = 1 else: self.lenb = int(self.lenb) self.starta = int(self.starta) self.startb = int(self.startb) try: diffhelpers.addlines(lr, self.hunk, self.lena, self.lenb, self.a, self.b) except error.ParseError as e: raise PatchError(_("bad hunk #%d: %s") % (self.number, e)) # if we hit eof before finishing out the hunk, the last line will # be zero length. Lets try to fix it up. while len(self.hunk[-1]) == 0: del self.hunk[-1] del self.a[-1] del self.b[-1] self.lena -= 1 self.lenb -= 1 self._fixnewline(lr) def read_context_hunk(self, lr): self.desc = lr.readline() m = contextdesc.match(self.desc) if not m: raise PatchError(_("bad hunk #%d") % self.number) self.starta, aend = m.groups() self.starta = int(self.starta) if aend is None: aend = self.starta self.lena = int(aend) - self.starta if self.starta: self.lena += 1 for x in xrange(self.lena): l = lr.readline() if l.startswith('---'): # lines addition, old block is empty lr.push(l) break s = l[2:] if l.startswith('- ') or l.startswith('! '): u = '-' + s elif l.startswith(' '): u = ' ' + s else: raise PatchError(_("bad hunk #%d old text line %d") % (self.number, x)) self.a.append(u) self.hunk.append(u) l = lr.readline() if l.startswith('\ '): s = self.a[-1][:-1] self.a[-1] = s self.hunk[-1] = s l = lr.readline() m = contextdesc.match(l) if not m: raise PatchError(_("bad hunk #%d") % self.number) self.startb, bend = m.groups() self.startb = int(self.startb) if bend is None: bend = self.startb self.lenb = int(bend) - self.startb if self.startb: self.lenb += 1 hunki = 1 for x in xrange(self.lenb): l = lr.readline() if l.startswith('\ '): # XXX: the only way to hit this is with an invalid line range. # The no-eol marker is not counted in the line range, but I # guess there are diff(1) out there which behave differently. s = self.b[-1][:-1] self.b[-1] = s self.hunk[hunki - 1] = s continue if not l: # line deletions, new block is empty and we hit EOF lr.push(l) break s = l[2:] if l.startswith('+ ') or l.startswith('! '): u = '+' + s elif l.startswith(' '): u = ' ' + s elif len(self.b) == 0: # line deletions, new block is empty lr.push(l) break else: raise PatchError(_("bad hunk #%d old text line %d") % (self.number, x)) self.b.append(s) while True: if hunki >= len(self.hunk): h = "" else: h = self.hunk[hunki] hunki += 1 if h == u: break elif h.startswith('-'): continue else: self.hunk.insert(hunki - 1, u) break if not self.a: # this happens when lines were only added to the hunk for x in self.hunk: if x.startswith('-') or x.startswith(' '): self.a.append(x) if not self.b: # this happens when lines were only deleted from the hunk for x in self.hunk: if x.startswith('+') or x.startswith(' '): self.b.append(x[1:]) # @@ -start,len +start,len @@ self.desc = "@@ -%d,%d +%d,%d @@\n" % (self.starta, self.lena, self.startb, self.lenb) self.hunk[0] = self.desc self._fixnewline(lr) def _fixnewline(self, lr): l = lr.readline() if l.startswith('\ '): diffhelpers.fixnewline(self.hunk, self.a, self.b) else: lr.push(l) def complete(self): return len(self.a) == self.lena and len(self.b) == self.lenb def _fuzzit(self, old, new, fuzz, toponly): # this removes context lines from the top and bottom of list 'l'. It # checks the hunk to make sure only context lines are removed, and then # returns a new shortened list of lines. fuzz = min(fuzz, len(old)) if fuzz: top = 0 bot = 0 hlen = len(self.hunk) for x in xrange(hlen - 1): # the hunk starts with the @@ line, so use x+1 if self.hunk[x + 1].startswith(' '): top += 1 else: break if not toponly: for x in xrange(hlen - 1): if self.hunk[hlen - bot - 1].startswith(' '): bot += 1 else: break bot = min(fuzz, bot) top = min(fuzz, top) return old[top:len(old) - bot], new[top:len(new) - bot], top return old, new, 0 def fuzzit(self, fuzz, toponly): old, new, top = self._fuzzit(self.a, self.b, fuzz, toponly) oldstart = self.starta + top newstart = self.startb + top # zero length hunk ranges already have their start decremented if self.lena and oldstart > 0: oldstart -= 1 if self.lenb and newstart > 0: newstart -= 1 return old, oldstart, new, newstart class binhunk(object): 'A binary patch file.' def __init__(self, lr, fname): self.text = None self.delta = False self.hunk = ['GIT binary patch\n'] self._fname = fname self._read(lr) def complete(self): return self.text is not None def new(self, lines): if self.delta: return [applybindelta(self.text, ''.join(lines))] return [self.text] def _read(self, lr): def getline(lr, hunk): l = lr.readline() hunk.append(l) return l.rstrip('\r\n') size = 0 while True: line = getline(lr, self.hunk) if not line: raise PatchError(_('could not extract "%s" binary data') % self._fname) if line.startswith('literal '): size = int(line[8:].rstrip()) break if line.startswith('delta '): size = int(line[6:].rstrip()) self.delta = True break dec = [] line = getline(lr, self.hunk) while len(line) > 1: l = line[0:1] if l <= 'Z' and l >= 'A': l = ord(l) - ord('A') + 1 else: l = ord(l) - ord('a') + 27 try: dec.append(util.b85decode(line[1:])[:l]) except ValueError as e: raise PatchError(_('could not decode "%s" binary patch: %s') % (self._fname, stringutil.forcebytestr(e))) line = getline(lr, self.hunk) text = zlib.decompress(''.join(dec)) if len(text) != size: raise PatchError(_('"%s" length is %d bytes, should be %d') % (self._fname, len(text), size)) self.text = text def parsefilename(str): # --- filename \t|space stuff s = str[4:].rstrip('\r\n') i = s.find('\t') if i < 0: i = s.find(' ') if i < 0: return s return s[:i] def reversehunks(hunks): '''reverse the signs in the hunks given as argument This function operates on hunks coming out of patch.filterpatch, that is a list of the form: [header1, hunk1, hunk2, header2...]. Example usage: >>> rawpatch = b"""diff --git a/folder1/g b/folder1/g ... --- a/folder1/g ... +++ b/folder1/g ... @@ -1,7 +1,7 @@ ... +firstline ... c ... 1 ... 2 ... + 3 ... -4 ... 5 ... d ... +lastline""" >>> hunks = parsepatch([rawpatch]) >>> hunkscomingfromfilterpatch = [] >>> for h in hunks: ... hunkscomingfromfilterpatch.append(h) ... hunkscomingfromfilterpatch.extend(h.hunks) >>> reversedhunks = reversehunks(hunkscomingfromfilterpatch) >>> from . import util >>> fp = util.stringio() >>> for c in reversedhunks: ... c.write(fp) >>> fp.seek(0) or None >>> reversedpatch = fp.read() >>> print(pycompat.sysstr(reversedpatch)) diff --git a/folder1/g b/folder1/g --- a/folder1/g +++ b/folder1/g @@ -1,4 +1,3 @@ -firstline c 1 2 @@ -2,6 +1,6 @@ c 1 2 - 3 +4 5 d @@ -6,3 +5,2 @@ 5 d -lastline ''' newhunks = [] for c in hunks: if util.safehasattr(c, 'reversehunk'): c = c.reversehunk() newhunks.append(c) return newhunks def parsepatch(originalchunks, maxcontext=None): """patch -> [] of headers -> [] of hunks If maxcontext is not None, trim context lines if necessary. >>> rawpatch = b'''diff --git a/folder1/g b/folder1/g ... --- a/folder1/g ... +++ b/folder1/g ... @@ -1,8 +1,10 @@ ... 1 ... 2 ... -3 ... 4 ... 5 ... 6 ... +6.1 ... +6.2 ... 7 ... 8 ... +9''' >>> out = util.stringio() >>> headers = parsepatch([rawpatch], maxcontext=1) >>> for header in headers: ... header.write(out) ... for hunk in header.hunks: ... hunk.write(out) >>> print(pycompat.sysstr(out.getvalue())) diff --git a/folder1/g b/folder1/g --- a/folder1/g +++ b/folder1/g @@ -2,3 +2,2 @@ 2 -3 4 @@ -6,2 +5,4 @@ 6 +6.1 +6.2 7 @@ -8,1 +9,2 @@ 8 +9 """ 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 = recordhunk(self.header, self.fromline, self.toline, self.proc, self.before, self.hunk, context, maxcontext) self.header.hunks.append(h) self.fromline += len(self.before) + h.removed self.toline += len(self.before) + h.added self.before = [] self.hunk = [] 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 addother(self, line): pass # 'other' lines are ignored 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, 'other': addother}, 'hunk': {'context': addcontext, 'file': newfile, 'range': addrange}, 'range': {'context': addcontext, 'hunk': addhunk}, 'other': {'other': addother}, } p = parser() fp = stringio() fp.write(''.join(originalchunks)) fp.seek(0) state = 'context' for newstate, data in scanpatch(fp): try: p.transitions[state][newstate](p, data) except KeyError: raise PatchError('unhandled transition: %s -> %s' % (state, newstate)) state = newstate del fp return p.finished() def pathtransform(path, strip, prefix): '''turn a path from a patch into a path suitable for the repository prefix, if not empty, is expected to be normalized with a / at the end. Returns (stripped components, path in repository). >>> pathtransform(b'a/b/c', 0, b'') ('', 'a/b/c') >>> pathtransform(b' a/b/c ', 0, b'') ('', ' a/b/c') >>> pathtransform(b' a/b/c ', 2, b'') ('a/b/', 'c') >>> pathtransform(b'a/b/c', 0, b'd/e/') ('', 'd/e/a/b/c') >>> pathtransform(b' a//b/c ', 2, b'd/e/') ('a//b/', 'd/e/c') >>> pathtransform(b'a/b/c', 3, b'') Traceback (most recent call last): PatchError: unable to strip away 1 of 3 dirs from a/b/c ''' pathlen = len(path) i = 0 if strip == 0: return '', prefix + path.rstrip() count = strip while count > 0: i = path.find('/', i) if i == -1: raise PatchError(_("unable to strip away %d of %d dirs from %s") % (count, strip, path)) i += 1 # consume '//' in the path while i < pathlen - 1 and path[i:i + 1] == '/': i += 1 count -= 1 return path[:i].lstrip(), prefix + path[i:].rstrip() def makepatchmeta(backend, afile_orig, bfile_orig, hunk, strip, prefix): nulla = afile_orig == "/dev/null" nullb = bfile_orig == "/dev/null" create = nulla and hunk.starta == 0 and hunk.lena == 0 remove = nullb and hunk.startb == 0 and hunk.lenb == 0 abase, afile = pathtransform(afile_orig, strip, prefix) gooda = not nulla and backend.exists(afile) bbase, bfile = pathtransform(bfile_orig, strip, prefix) if afile == bfile: goodb = gooda else: goodb = not nullb and backend.exists(bfile) missing = not goodb and not gooda and not create # some diff programs apparently produce patches where the afile is # not /dev/null, but afile starts with bfile abasedir = afile[:afile.rfind('/') + 1] bbasedir = bfile[:bfile.rfind('/') + 1] if (missing and abasedir == bbasedir and afile.startswith(bfile) and hunk.starta == 0 and hunk.lena == 0): create = True missing = False # If afile is "a/b/foo" and bfile is "a/b/foo.orig" we assume the # diff is between a file and its backup. In this case, the original # file should be patched (see original mpatch code). isbackup = (abase == bbase and bfile.startswith(afile)) fname = None if not missing: if gooda and goodb: if isbackup: fname = afile else: fname = bfile elif gooda: fname = afile if not fname: if not nullb: if isbackup: fname = afile else: fname = bfile elif not nulla: fname = afile else: raise PatchError(_("undefined source and destination files")) gp = patchmeta(fname) if create: gp.op = 'ADD' elif remove: gp.op = 'DELETE' return gp 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, proc)) """ lines_re = re.compile(br'@@ -(\d+),(\d+) \+(\d+),(\d+) @@\s*(.*)') lr = linereader(fp) def scanwhile(first, p): """scan lr while predicate holds""" lines = [first] for line in iter(lr.readline, ''): if p(line): lines.append(line) else: lr.push(line) break return lines for line in iter(lr.readline, ''): 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.startswith(' '): cs = (' ', '\\') yield 'context', scanwhile(line, lambda l: l.startswith(cs)) elif line.startswith(('-', '+')): cs = ('-', '+', '\\') yield 'hunk', scanwhile(line, lambda l: l.startswith(cs)) else: m = lines_re.match(line) if m: yield 'range', m.groups() else: yield 'other', line def scangitpatch(lr, firstline): """ Git patches can emit: - rename a to b - change b - copy a to c - change c We cannot apply this sequence as-is, the renamed 'a' could not be found for it would have been renamed already. And we cannot copy from 'b' instead because 'b' would have been changed already. So we scan the git patch for copy and rename commands so we can perform the copies ahead of time. """ pos = 0 try: pos = lr.fp.tell() fp = lr.fp except IOError: fp = stringio(lr.fp.read()) gitlr = linereader(fp) gitlr.push(firstline) gitpatches = readgitpatch(gitlr) fp.seek(pos) return gitpatches def iterhunks(fp): """Read a patch and yield the following events: - ("file", afile, bfile, firsthunk): select a new target file. - ("hunk", hunk): a new hunk is ready to be applied, follows a "file" event. - ("git", gitchanges): current diff is in git format, gitchanges maps filenames to gitpatch records. Unique event. """ afile = "" bfile = "" state = None hunknum = 0 emitfile = newfile = False gitpatches = None # our states BFILE = 1 context = None lr = linereader(fp) for x in iter(lr.readline, ''): if state == BFILE and ( (not context and x.startswith('@')) or (context is not False and x.startswith('***************')) or x.startswith('GIT binary patch')): gp = None if (gitpatches and gitpatches[-1].ispatching(afile, bfile)): gp = gitpatches.pop() if x.startswith('GIT binary patch'): h = binhunk(lr, gp.path) else: if context is None and x.startswith('***************'): context = True h = hunk(x, hunknum + 1, lr, context) hunknum += 1 if emitfile: emitfile = False yield 'file', (afile, bfile, h, gp and gp.copy() or None) yield 'hunk', h elif x.startswith('diff --git a/'): m = gitre.match(x.rstrip(' \r\n')) if not m: continue if gitpatches is None: # scan whole input for git metadata gitpatches = scangitpatch(lr, x) yield 'git', [g.copy() for g in gitpatches if g.op in ('COPY', 'RENAME')] gitpatches.reverse() afile = 'a/' + m.group(1) bfile = 'b/' + m.group(2) while gitpatches and not gitpatches[-1].ispatching(afile, bfile): gp = gitpatches.pop() yield 'file', ('a/' + gp.path, 'b/' + gp.path, None, gp.copy()) if not gitpatches: raise PatchError(_('failed to synchronize metadata for "%s"') % afile[2:]) gp = gitpatches[-1] newfile = True elif x.startswith('---'): # check for a unified diff l2 = lr.readline() if not l2.startswith('+++'): lr.push(l2) continue newfile = True context = False afile = parsefilename(x) bfile = parsefilename(l2) elif x.startswith('***'): # check for a context diff l2 = lr.readline() if not l2.startswith('---'): lr.push(l2) continue l3 = lr.readline() lr.push(l3) if not l3.startswith("***************"): lr.push(l2) continue newfile = True context = True afile = parsefilename(x) bfile = parsefilename(l2) if newfile: newfile = False emitfile = True state = BFILE hunknum = 0 while gitpatches: gp = gitpatches.pop() yield 'file', ('a/' + gp.path, 'b/' + gp.path, None, gp.copy()) def applybindelta(binchunk, data): """Apply a binary delta hunk The algorithm used is the algorithm from git's patch-delta.c """ def deltahead(binchunk): i = 0 for c in binchunk: i += 1 if not (ord(c) & 0x80): return i return i out = "" s = deltahead(binchunk) binchunk = binchunk[s:] s = deltahead(binchunk) binchunk = binchunk[s:] i = 0 while i < len(binchunk): cmd = ord(binchunk[i]) i += 1 if (cmd & 0x80): offset = 0 size = 0 if (cmd & 0x01): offset = ord(binchunk[i]) i += 1 if (cmd & 0x02): offset |= ord(binchunk[i]) << 8 i += 1 if (cmd & 0x04): offset |= ord(binchunk[i]) << 16 i += 1 if (cmd & 0x08): offset |= ord(binchunk[i]) << 24 i += 1 if (cmd & 0x10): size = ord(binchunk[i]) i += 1 if (cmd & 0x20): size |= ord(binchunk[i]) << 8 i += 1 if (cmd & 0x40): size |= ord(binchunk[i]) << 16 i += 1 if size == 0: size = 0x10000 offset_end = offset + size out += data[offset:offset_end] elif cmd != 0: offset_end = i + cmd out += binchunk[i:offset_end] i += cmd else: raise PatchError(_('unexpected delta opcode 0')) return out def applydiff(ui, fp, backend, store, strip=1, prefix='', eolmode='strict'): """Reads a patch from fp and tries to apply it. Returns 0 for a clean patch, -1 if any rejects were found and 1 if there was any fuzz. If 'eolmode' is 'strict', the patch content and patched file are read in binary mode. Otherwise, line endings are ignored when patching then normalized according to 'eolmode'. """ return _applydiff(ui, fp, patchfile, backend, store, strip=strip, prefix=prefix, eolmode=eolmode) def _canonprefix(repo, prefix): if prefix: prefix = pathutil.canonpath(repo.root, repo.getcwd(), prefix) if prefix != '': prefix += '/' return prefix def _applydiff(ui, fp, patcher, backend, store, strip=1, prefix='', eolmode='strict'): prefix = _canonprefix(backend.repo, prefix) def pstrip(p): return pathtransform(p, strip - 1, prefix)[1] rejects = 0 err = 0 current_file = None for state, values in iterhunks(fp): if state == 'hunk': if not current_file: continue ret = current_file.apply(values) if ret > 0: err = 1 elif state == 'file': if current_file: rejects += current_file.close() current_file = None afile, bfile, first_hunk, gp = values if gp: gp.path = pstrip(gp.path) if gp.oldpath: gp.oldpath = pstrip(gp.oldpath) else: gp = makepatchmeta(backend, afile, bfile, first_hunk, strip, prefix) if gp.op == 'RENAME': backend.unlink(gp.oldpath) if not first_hunk: if gp.op == 'DELETE': backend.unlink(gp.path) continue data, mode = None, None if gp.op in ('RENAME', 'COPY'): data, mode = store.getfile(gp.oldpath)[:2] if data is None: # This means that the old path does not exist raise PatchError(_("source file '%s' does not exist") % gp.oldpath) if gp.mode: mode = gp.mode if gp.op == 'ADD': # Added files without content have no hunk and # must be created data = '' if data or mode: if (gp.op in ('ADD', 'RENAME', 'COPY') and backend.exists(gp.path)): raise PatchError(_("cannot create %s: destination " "already exists") % gp.path) backend.setfile(gp.path, data, mode, gp.oldpath) continue try: current_file = patcher(ui, gp, backend, store, eolmode=eolmode) except PatchError as inst: ui.warn(str(inst) + '\n') current_file = None rejects += 1 continue elif state == 'git': for gp in values: path = pstrip(gp.oldpath) data, mode = backend.getfile(path) if data is None: # The error ignored here will trigger a getfile() # error in a place more appropriate for error # handling, and will not interrupt the patching # process. pass else: store.setfile(path, data, mode) else: raise error.Abort(_('unsupported parser state: %s') % state) if current_file: rejects += current_file.close() if rejects: return -1 return err def _externalpatch(ui, repo, patcher, patchname, strip, files, similarity): """use <patcher> to apply <patchname> to the working directory. returns whether patch was applied with fuzz factor.""" fuzz = False args = [] cwd = repo.root if cwd: args.append('-d %s' % procutil.shellquote(cwd)) cmd = ('%s %s -p%d < %s' % (patcher, ' '.join(args), strip, procutil.shellquote(patchname))) fp = procutil.popen(cmd, 'rb') try: for line in util.iterfile(fp): line = line.rstrip() ui.note(line + '\n') if line.startswith('patching file '): pf = util.parsepatchoutput(line) printed_file = False files.add(pf) elif line.find('with fuzz') >= 0: fuzz = True if not printed_file: ui.warn(pf + '\n') printed_file = True ui.warn(line + '\n') elif line.find('saving rejects to file') >= 0: ui.warn(line + '\n') elif line.find('FAILED') >= 0: if not printed_file: ui.warn(pf + '\n') printed_file = True ui.warn(line + '\n') finally: if files: scmutil.marktouched(repo, files, similarity) code = fp.close() if code: raise PatchError(_("patch command failed: %s") % procutil.explainexit(code)) return fuzz def patchbackend(ui, backend, patchobj, strip, prefix, files=None, eolmode='strict'): if files is None: files = set() if eolmode is None: eolmode = ui.config('patch', 'eol') if eolmode.lower() not in eolmodes: raise error.Abort(_('unsupported line endings type: %s') % eolmode) eolmode = eolmode.lower() store = filestore() try: fp = open(patchobj, 'rb') except TypeError: fp = patchobj try: ret = applydiff(ui, fp, backend, store, strip=strip, prefix=prefix, eolmode=eolmode) finally: if fp != patchobj: fp.close() files.update(backend.close()) store.close() if ret < 0: raise PatchError(_('patch failed to apply')) return ret > 0 def internalpatch(ui, repo, patchobj, strip, prefix='', files=None, eolmode='strict', similarity=0): """use builtin patch to apply <patchobj> to the working directory. returns whether patch was applied with fuzz factor.""" backend = workingbackend(ui, repo, similarity) return patchbackend(ui, backend, patchobj, strip, prefix, files, eolmode) def patchrepo(ui, repo, ctx, store, patchobj, strip, prefix, files=None, eolmode='strict'): backend = repobackend(ui, repo, ctx, store) return patchbackend(ui, backend, patchobj, strip, prefix, files, eolmode) def patch(ui, repo, patchname, strip=1, prefix='', files=None, eolmode='strict', similarity=0): """Apply <patchname> to the working directory. 'eolmode' specifies how end of lines should be handled. It can be: - 'strict': inputs are read in binary mode, EOLs are preserved - 'crlf': EOLs are ignored when patching and reset to CRLF - 'lf': EOLs are ignored when patching and reset to LF - None: get it from user settings, default to 'strict' 'eolmode' is ignored when using an external patcher program. Returns whether patch was applied with fuzz factor. """ patcher = ui.config('ui', 'patch') if files is None: files = set() if patcher: return _externalpatch(ui, repo, patcher, patchname, strip, files, similarity) return internalpatch(ui, repo, patchname, strip, prefix, files, eolmode, similarity) def changedfiles(ui, repo, patchpath, strip=1, prefix=''): backend = fsbackend(ui, repo.root) prefix = _canonprefix(repo, prefix) with open(patchpath, 'rb') as fp: changed = set() for state, values in iterhunks(fp): if state == 'file': afile, bfile, first_hunk, gp = values if gp: gp.path = pathtransform(gp.path, strip - 1, prefix)[1] if gp.oldpath: gp.oldpath = pathtransform(gp.oldpath, strip - 1, prefix)[1] else: gp = makepatchmeta(backend, afile, bfile, first_hunk, strip, prefix) changed.add(gp.path) if gp.op == 'RENAME': changed.add(gp.oldpath) elif state not in ('hunk', 'git'): raise error.Abort(_('unsupported parser state: %s') % state) 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 working directory. if node1 is None, use first dirstate parent instead. if node2 is None, compare node1 with working directory. losedatafn(**kwarg) is a callable run when opts.upgrade=True and every time some change cannot be represented with the current patch format. Return False to upgrade to git patch format, True to accept the loss or raise an exception to abort the diff. It is called with the name of current file being diffed as 'fn'. If set to None, patches will always be upgraded to git format when necessary. prefix is a filename prefix that is prepended to all filenames on display (used for subrepos). relroot, if not empty, must be normalized with a trailing /. Any match patterns that fall outside it will be ignored. copy, if not empty, should contain mappings {dst@y: src@x} of copy information. hunksfilterfn, if not None, should be a function taking a filectx and hunks generator that may yield filtered hunks. ''' for fctx1, fctx2, hdr, hunks in diffhunks( repo, node1=node1, node2=node2, match=match, changes=changes, opts=opts, losedatafn=losedatafn, prefix=prefix, relroot=relroot, copy=copy, ): if hunksfilterfn is not None: # If the file has been removed, fctx2 is None; but this should # not occur here since we catch removed files early in # logcmdutil.getlinerangerevs() for 'hg log -L'. assert fctx2 is not None, \ 'fctx2 unexpectly None in diff hunks filtering' hunks = hunksfilterfn(fctx2, hunks) text = ''.join(sum((list(hlines) for hrange, hlines in hunks), [])) if hdr and (text or len(hdr) > 1): yield '\n'.join(hdr) + '\n' if text: yield text def diffhunks(repo, node1=None, node2=None, match=None, changes=None, opts=None, losedatafn=None, prefix='', relroot='', copy=None): """Yield diff of changes to files in the form of (`header`, `hunks`) tuples where `header` is a list of diff headers and `hunks` is an iterable of (`hunkrange`, `hunklines`) tuples. See diff() for the meaning of parameters. """ if opts is None: opts = mdiff.defaultopts if not node1 and not node2: node1 = repo.dirstate.p1() def lrugetfilectx(): cache = {} order = collections.deque() def getfilectx(f, ctx): fctx = ctx.filectx(f, filelog=cache.get(f)) if f not in cache: if len(cache) > 20: del cache[order.popleft()] cache[f] = fctx.filelog() else: order.remove(f) order.append(f) return fctx return getfilectx getfilectx = lrugetfilectx() ctx1 = repo[node1] ctx2 = repo[node2] relfiltered = False if relroot != '' and match.always(): # as a special case, create a new matcher with just the relroot pats = [relroot] match = scmutil.match(ctx2, pats, default='path') relfiltered = True if not changes: changes = repo.status(ctx1, ctx2, match=match) modified, added, removed = changes[:3] if not modified and not added and not removed: return [] if repo.ui.debugflag: hexfunc = hex else: hexfunc = short revs = [hexfunc(node) for node in [ctx1.node(), ctx2.node()] if node] if copy is None: copy = {} if opts.git or opts.upgrade: copy = copies.pathcopies(ctx1, ctx2, match=match) if relroot is not None: if not relfiltered: # XXX this would ideally be done in the matcher, but that is # generally meant to 'or' patterns, not 'and' them. In this case we # need to 'and' all the patterns from the matcher with relroot. def filterrel(l): return [f for f in l if f.startswith(relroot)] modified = filterrel(modified) added = filterrel(added) removed = filterrel(removed) relfiltered = True # filter out copies where either side isn't inside the relative root copy = dict(((dst, src) for (dst, src) in copy.iteritems() if dst.startswith(relroot) and src.startswith(relroot))) modifiedset = set(modified) addedset = set(added) removedset = set(removed) for f in modified: if f not in ctx1: # Fix up added, since merged-in additions appear as # modifications during merges modifiedset.remove(f) addedset.add(f) for f in removed: if f not in ctx1: # Merged-in additions that are then removed are reported as removed. # They are not in ctx1, so We don't want to show them in the diff. removedset.remove(f) modified = sorted(modifiedset) added = sorted(addedset) removed = sorted(removedset) for dst, src in list(copy.items()): if src not in ctx1: # Files merged in during a merge and then copied/renamed are # reported as copies. We want to show them in the diff as additions. del copy[dst] prefetchmatch = scmutil.matchfiles( repo, list(modifiedset | addedset | removedset)) scmutil.prefetchfiles(repo, [ctx1.rev(), ctx2.rev()], prefetchmatch) def difffn(opts, losedata): return trydiff(repo, revs, ctx1, ctx2, modified, added, removed, copy, getfilectx, opts, losedata, prefix, relroot) if opts.upgrade and not opts.git: try: def losedata(fn): if not losedatafn or not losedatafn(fn=fn): raise GitDiffRequired # Buffer the whole output until we are sure it can be generated return list(difffn(opts.copy(git=False), losedata)) except GitDiffRequired: return difffn(opts.copy(git=True), None) else: return difffn(opts, None) def diffsinglehunk(hunklines): """yield tokens for a list of lines in a single hunk""" for line in hunklines: # chomp chompline = line.rstrip('\n') # highlight tabs and trailing whitespace stripline = chompline.rstrip() if line[0] == '-': label = 'diff.deleted' elif line[0] == '+': label = 'diff.inserted' else: raise error.ProgrammingError('unexpected hunk line: %s' % line) for token in tabsplitter.findall(stripline): if '\t' == token[0]: yield (token, 'diff.tab') else: yield (token, label) if chompline != stripline: yield (chompline[len(stripline):], 'diff.trailingwhitespace') if chompline != line: yield (line[len(chompline):], '') def diffsinglehunkinline(hunklines): """yield tokens for a list of lines in a single hunk, with inline colors""" # prepare deleted, and inserted content a = '' b = '' for line in hunklines: if line[0] == '-': a += line[1:] elif line[0] == '+': b += line[1:] else: raise error.ProgrammingError('unexpected hunk line: %s' % line) # fast path: if either side is empty, use diffsinglehunk if not a or not b: for t in diffsinglehunk(hunklines): yield t return # re-split the content into words al = wordsplitter.findall(a) bl = wordsplitter.findall(b) # re-arrange the words to lines since the diff algorithm is line-based aln = [s if s == '\n' else s + '\n' for s in al] bln = [s if s == '\n' else s + '\n' for s in bl] an = ''.join(aln) bn = ''.join(bln) # run the diff algorithm, prepare atokens and btokens atokens = [] btokens = [] blocks = mdiff.allblocks(an, bn, lines1=aln, lines2=bln) for (a1, a2, b1, b2), btype in blocks: changed = btype == '!' for token in mdiff.splitnewlines(''.join(al[a1:a2])): atokens.append((changed, token)) for token in mdiff.splitnewlines(''.join(bl[b1:b2])): btokens.append((changed, token)) # yield deleted tokens, then inserted ones for prefix, label, tokens in [('-', 'diff.deleted', atokens), ('+', 'diff.inserted', btokens)]: nextisnewline = True for changed, token in tokens: if nextisnewline: yield (prefix, label) nextisnewline = False # special handling line end isendofline = token.endswith('\n') if isendofline: chomp = token[:-1] # chomp token = chomp.rstrip() # detect spaces at the end endspaces = chomp[len(token):] # scan tabs for maybetab in tabsplitter.findall(token): if '\t' == maybetab[0]: currentlabel = 'diff.tab' else: if changed: currentlabel = label + '.changed' else: currentlabel = label + '.unchanged' yield (maybetab, currentlabel) if isendofline: if endspaces: yield (endspaces, 'diff.trailingwhitespace') yield ('\n', '') nextisnewline = True def difflabel(func, *args, **kw): '''yields 2-tuples of (output, label) based on the output of func()''' if kw.get(r'opts') and kw[r'opts'].worddiff: dodiffhunk = diffsinglehunkinline else: dodiffhunk = diffsinglehunk headprefixes = [('diff', 'diff.diffline'), ('copy', 'diff.extended'), ('rename', 'diff.extended'), ('old', 'diff.extended'), ('new', 'diff.extended'), ('deleted', 'diff.extended'), ('index', 'diff.extended'), ('similarity', 'diff.extended'), ('---', 'diff.file_a'), ('+++', 'diff.file_b')] textprefixes = [('@', 'diff.hunk'), # - and + are handled by diffsinglehunk ] head = False # buffers a hunk, i.e. adjacent "-", "+" lines without other changes. hunkbuffer = [] def consumehunkbuffer(): if hunkbuffer: for token in dodiffhunk(hunkbuffer): yield token hunkbuffer[:] = [] for chunk in func(*args, **kw): lines = chunk.split('\n') linecount = len(lines) for i, line in enumerate(lines): if head: if line.startswith('@'): head = False else: if line and not line.startswith((' ', '+', '-', '@', '\\')): head = True diffline = False if not head and line and line.startswith(('+', '-')): diffline = True prefixes = textprefixes if head: prefixes = headprefixes if diffline: # buffered bufferedline = line if i + 1 < linecount: bufferedline += "\n" hunkbuffer.append(bufferedline) else: # unbuffered for token in consumehunkbuffer(): yield token stripline = line.rstrip() for prefix, label in prefixes: if stripline.startswith(prefix): yield (stripline, label) if line != stripline: yield (line[len(stripline):], 'diff.trailingwhitespace') break else: yield (line, '') if i + 1 < linecount: yield ('\n', '') for token in consumehunkbuffer(): yield token def diffui(*args, **kw): '''like diff(), but yields 2-tuples of (output, label) for ui.write()''' return difflabel(diff, *args, **kw) def _filepairs(modified, added, removed, copy, opts): '''generates tuples (f1, f2, copyop), where f1 is the name of the file before and f2 is the the name after. For added files, f1 will be None, and for removed files, f2 will be None. copyop may be set to None, 'copy' or 'rename' (the latter two only if opts.git is set).''' gone = set() copyto = dict([(v, k) for k, v in copy.items()]) addedset, removedset = set(added), set(removed) for f in sorted(modified + added + removed): copyop = None f1, f2 = f, f if f in addedset: f1 = None if f in copy: if opts.git: f1 = copy[f] if f1 in removedset and f1 not in gone: copyop = 'rename' gone.add(f1) else: copyop = 'copy' elif f in removedset: f2 = None if opts.git: # have we already reported a copy above? if (f in copyto and copyto[f] in addedset and copy[copyto[f]] == f): continue yield f1, f2, copyop def trydiff(repo, revs, ctx1, ctx2, modified, added, removed, copy, getfilectx, opts, losedatafn, prefix, relroot): '''given input data, generate a diff and yield it in blocks If generating a diff would lose data like flags or binary data and losedatafn is not None, it will be called. relroot is removed and prefix is added to every path in the diff output. If relroot is not empty, this function expects every path in modified, added, removed and copy to start with it.''' def gitindex(text): if not text: text = "" l = len(text) s = hashlib.sha1('blob %d\0' % l) s.update(text) return hex(s.digest()) if opts.noprefix: aprefix = bprefix = '' else: aprefix = 'a/' bprefix = 'b/' def diffline(f, revs): revinfo = ' '.join(["-r %s" % rev for rev in revs]) return 'diff %s %s' % (revinfo, f) def isempty(fctx): return fctx is None or fctx.size() == 0 date1 = dateutil.datestr(ctx1.date()) date2 = dateutil.datestr(ctx2.date()) gitmode = {'l': '120000', 'x': '100755', '': '100644'} if relroot != '' and (repo.ui.configbool('devel', 'all-warnings') or repo.ui.configbool('devel', 'check-relroot')): for f in modified + added + removed + list(copy) + list(copy.values()): if f is not None and not f.startswith(relroot): raise AssertionError( "file %s doesn't start with relroot %s" % (f, relroot)) for f1, f2, copyop in _filepairs(modified, added, removed, copy, opts): content1 = None content2 = None fctx1 = None fctx2 = None flag1 = None flag2 = None if f1: fctx1 = getfilectx(f1, ctx1) if opts.git or losedatafn: flag1 = ctx1.flags(f1) if f2: fctx2 = getfilectx(f2, ctx2) if opts.git or losedatafn: flag2 = ctx2.flags(f2) # if binary is True, output "summary" or "base85", but not "text diff" if opts.text: binary = False else: binary = any(f.isbinary() for f in [fctx1, fctx2] if f is not None) if losedatafn and not opts.git: if (binary or # copy/rename f2 in copy or # empty file creation (not f1 and isempty(fctx2)) or # empty file deletion (isempty(fctx1) and not f2) or # create with flags (not f1 and flag2) or # change flags (f1 and f2 and flag1 != flag2)): losedatafn(f2 or f1) path1 = f1 or f2 path2 = f2 or f1 path1 = posixpath.join(prefix, path1[len(relroot):]) path2 = posixpath.join(prefix, path2[len(relroot):]) header = [] if opts.git: header.append('diff --git %s%s %s%s' % (aprefix, path1, bprefix, path2)) if not f1: # added header.append('new file mode %s' % gitmode[flag2]) elif not f2: # removed header.append('deleted file mode %s' % gitmode[flag1]) else: # modified/copied/renamed mode1, mode2 = gitmode[flag1], gitmode[flag2] if mode1 != mode2: header.append('old mode %s' % mode1) header.append('new mode %s' % mode2) if copyop is not None: if opts.showsimilarity: sim = similar.score(ctx1[path1], ctx2[path2]) * 100 header.append('similarity index %d%%' % sim) header.append('%s from %s' % (copyop, path1)) header.append('%s to %s' % (copyop, path2)) elif revs and not repo.ui.quiet: header.append(diffline(path1, revs)) # fctx.is | diffopts | what to | is fctx.data() # binary() | text nobinary git index | output? | outputted? # ------------------------------------|---------------------------- # yes | no no no * | summary | no # yes | no no yes * | base85 | yes # yes | no yes no * | summary | no # yes | no yes yes 0 | summary | no # yes | no yes yes >0 | summary | semi [1] # yes | yes * * * | text diff | yes # no | * * * * | text diff | yes # [1]: hash(fctx.data()) is outputted. so fctx.data() cannot be faked if binary and (not opts.git or (opts.git and opts.nobinary and not opts.index)): # fast path: no binary content will be displayed, content1 and # content2 are only used for equivalent test. cmp() could have a # fast path. if fctx1 is not None: content1 = b'\0' if fctx2 is not None: if fctx1 is not None and not fctx1.cmp(fctx2): content2 = b'\0' # not different else: content2 = b'\0\0' else: # normal path: load contents if fctx1 is not None: content1 = fctx1.data() if fctx2 is not None: content2 = fctx2.data() if binary and opts.git and not opts.nobinary: text = mdiff.b85diff(content1, content2) if text: header.append('index %s..%s' % (gitindex(content1), gitindex(content2))) hunks = (None, [text]), else: if opts.git and opts.index > 0: flag = flag1 if flag is None: flag = flag2 header.append('index %s..%s %s' % (gitindex(content1)[0:opts.index], gitindex(content2)[0:opts.index], gitmode[flag])) uheaders, hunks = mdiff.unidiff(content1, date1, content2, date2, path1, path2, binary=binary, opts=opts) header.extend(uheaders) yield fctx1, fctx2, header, hunks def diffstatsum(stats): maxfile, maxtotal, addtotal, removetotal, binary = 0, 0, 0, 0, False for f, a, r, b in stats: maxfile = max(maxfile, encoding.colwidth(f)) maxtotal = max(maxtotal, a + r) addtotal += a removetotal += r binary = binary or b return maxfile, maxtotal, addtotal, removetotal, binary def diffstatdata(lines): diffre = re.compile('^diff .*-r [a-z0-9]+\s(.*)$') results = [] filename, adds, removes, isbinary = None, 0, 0, False def addresult(): if filename: results.append((filename, adds, removes, isbinary)) # inheader is used to track if a line is in the # header portion of the diff. This helps properly account # for lines that start with '--' or '++' inheader = False for line in lines: if line.startswith('diff'): addresult() # starting a new file diff # set numbers to 0 and reset inheader inheader = True adds, removes, isbinary = 0, 0, False if line.startswith('diff --git a/'): filename = gitre.search(line).group(2) elif line.startswith('diff -r'): # format: "diff -r ... -r ... filename" filename = diffre.search(line).group(1) elif line.startswith('@@'): inheader = False elif line.startswith('+') and not inheader: adds += 1 elif line.startswith('-') and not inheader: removes += 1 elif (line.startswith('GIT binary patch') or line.startswith('Binary file')): isbinary = True addresult() return results def diffstat(lines, width=80): output = [] stats = diffstatdata(lines) maxname, maxtotal, totaladds, totalremoves, hasbinary = diffstatsum(stats) countwidth = len(str(maxtotal)) if hasbinary and countwidth < 3: countwidth = 3 graphwidth = width - countwidth - maxname - 6 if graphwidth < 10: graphwidth = 10 def scale(i): if maxtotal <= graphwidth: return i # If diffstat runs out of room it doesn't print anything, # which isn't very useful, so always print at least one + or - # if there were at least some changes. return max(i * graphwidth // maxtotal, int(bool(i))) for filename, adds, removes, isbinary in stats: if isbinary: count = 'Bin' else: count = '%d' % (adds + removes) pluses = '+' * scale(adds) minuses = '-' * scale(removes) output.append(' %s%s | %*s %s%s\n' % (filename, ' ' * (maxname - encoding.colwidth(filename)), countwidth, count, pluses, minuses)) if stats: output.append(_(' %d files changed, %d insertions(+), ' '%d deletions(-)\n') % (len(stats), totaladds, totalremoves)) return ''.join(output) def diffstatui(*args, **kw): '''like diffstat(), but yields 2-tuples of (output, label) for ui.write() ''' for line in diffstat(*args, **kw).splitlines(): if line and line[-1] in '+-': name, graph = line.rsplit(' ', 1) yield (name + ' ', '') m = re.search(br'\++', graph) if m: yield (m.group(0), 'diffstat.inserted') m = re.search(br'-+', graph) if m: yield (m.group(0), 'diffstat.deleted') else: yield (line, '') yield ('\n', '')