# patch.py - patch file parsing routines # # Copyright 2006 Brendan Cully # Copyright 2007 Chris Mason # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. import cStringIO, email.Parser, os, errno, re import tempfile, zlib, shutil from i18n import _ from node import hex, nullid, short import base85, mdiff, scmutil, util, diffhelpers, copies, encoding gitre = re.compile('diff --git a/(.*) b/(.*)') class PatchError(Exception): pass # public functions def split(stream): '''return an iterator of individual patches from a stream''' def isheader(line, inheader): if inheader and line[0] in (' ', '\t'): # continuation return True if line[0] in (' ', '-', '+'): # 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 cStringIO.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 = cStringIO.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 = email.Parser.Parser().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 inheader = False cur = [] mimeheaders = ['content-type'] if not hasattr(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) def extract(ui, fileobj): '''extract patch from data read from fileobj. patch can be a normal patch or contained in an email message. return tuple (filename, message, user, date, branch, node, p1, p2). Any item in the returned tuple can be None. If filename is None, fileobj did not contain a patch. Caller must unlink filename when done.''' # attempt to detect the start of a patch # (this heuristic is borrowed from quilt) diffre = re.compile(r'^(?:Index:[ \t]|diff[ \t]|RCS file: |' r'retrieving revision [0-9]+(\.[0-9]+)*$|' r'---[ \t].*?^\+\+\+[ \t]|' r'\*\*\*[ \t].*?^---[ \t])', re.MULTILINE|re.DOTALL) fd, tmpname = tempfile.mkstemp(prefix='hg-patch-') tmpfp = os.fdopen(fd, 'w') try: msg = email.Parser.Parser().parse(fileobj) subject = msg['Subject'] user = msg['From'] if not subject and not user: # Not an email, restore parsed headers if any subject = '\n'.join(': '.join(h) for h in msg.items()) + '\n' gitsendmail = 'git-send-email' in msg.get('X-Mailer', '') # should try to parse msg['Date'] date = None nodeid = None branch = None parents = [] if subject: if subject.startswith('[PATCH'): pend = subject.find(']') if pend >= 0: subject = subject[pend + 1:].lstrip() subject = subject.replace('\n\t', ' ') ui.debug('Subject: %s\n' % subject) if user: ui.debug('From: %s\n' % user) diffs_seen = 0 ok_types = ('text/plain', 'text/x-diff', 'text/x-patch') message = '' for part in msg.walk(): content_type = 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 = cStringIO.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 '): user = line[7:] ui.debug('From: %s\n' % user) elif line.startswith("# Date "): date = line[7:] elif line.startswith("# Branch "): branch = line[9:] elif line.startswith("# Node ID "): nodeid = line[10:] elif line.startswith("# Parent "): parents.append(line[10:]) elif not line.startswith("# "): hgpatchheader = False elif line == '---' and gitsendmail: 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 except: tmpfp.close() os.unlink(tmpname) raise if subject and not message.startswith(subject): message = '%s\n%s' % (subject, message) tmpfp.close() if not diffs_seen: os.unlink(tmpname) return None, message, user, date, branch, None, None, None p1 = parents and parents.pop(0) or None p2 = parents and parents.pop(0) or None return tmpname, message, user, date, branch, nodeid, p1, p2 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 & 020000 isexec = mode & 0100 self.mode = (islink, isexec) def __repr__(self): return "" % (self.op, self.path) def readgitpatch(lr): """extract git-style metadata about patches from """ # Filter patch for git information gp = None gitpatches = [] for line in lr: line = line.rstrip(' \r\n') if line.startswith('diff --git'): 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): while True: l = self.readline() if not l: break yield l 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. """ 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. """ pass def exists(self, fname): raise NotImplementedError class fsbackend(abstractbackend): def __init__(self, ui, basedir): super(fsbackend, self).__init__(ui) self.opener = scmutil.opener(basedir) def _join(self, f): return os.path.join(self.opener.base, f) def getfile(self, fname): path = self._join(fname) if os.path.islink(path): return (os.readlink(path), (True, False)) isexec = False try: isexec = os.lstat(path).st_mode & 0100 != 0 except OSError, e: if e.errno != errno.ENOENT: raise return (self.opener.read(fname), (False, isexec)) def setfile(self, fname, data, mode, copysource): islink, isexec = mode if data is None: util.setflags(self._join(fname), islink, isexec) return if islink: self.opener.symlink(data, fname) else: self.opener.write(fname, data) if isexec: util.setflags(self._join(fname), False, True) def unlink(self, fname): try: util.unlinkpath(self._join(fname)) except OSError, inst: if inst.errno != errno.ENOENT: raise 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 os.path.lexists(self._join(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] addremoved = set(self.changed) for src, dst in self.copied: scmutil.dirstatecopy(self.ui, self.repo, wctx, src, dst) addremoved.discard(src) if (not self.similarity) and self.removed: wctx.forget(sorted(self.removed)) if addremoved: cwd = self.repo.getcwd() if cwd: addremoved = [util.pathto(self.repo.root, cwd, f) for f in addremoved] scmutil.addremove(self.repo, addremoved, similarity=self.similarity) return sorted(self.changed) class filestore(object): def __init__(self): self.opener = None self.files = {} self.created = 0 def setfile(self, fname, data, mode): if self.opener is None: root = tempfile.mkdtemp(prefix='hg-patch-') self.opener = scmutil.opener(root) # Avoid filename issues with these simple names fn = str(self.created) self.opener.write(fn, data) self.created += 1 self.files[fname] = (fn, mode) def getfile(self, fname): if fname not in self.files: raise IOError() fn, mode = self.files[fname] return self.opener.read(fn), mode def close(self): if self.opener: shutil.rmtree(self.opener.base) # @@ -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, fname, backend, store, mode, create, remove, eolmode='strict', copysource=None): self.fname = fname self.eolmode = eolmode self.eol = None self.backend = backend self.ui = ui self.lines = [] self.exists = False self.missing = True self.mode = mode self.copysource = copysource self.create = create self.remove = remove try: if copysource is None: data, mode = backend.getfile(fname) self.exists = True else: data, mode = store.getfile(copysource) self.exists = backend.exists(fname) self.missing = False if data: self.lines = data.splitlines(True) 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 except IOError: if 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.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: self.lines[:] = h.new() self.offset += len(h.new()) 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 = h.old() # patch starts counting at 1 unless we are adding the file if h.starta == 0: start = 0 else: start = h.starta + self.offset - 1 orig_start = start # 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, start) == 0: if self.remove: self.backend.unlink(self.fname) else: self.lines[start : start + h.lena] = h.new() self.offset += h.lenb - h.lena 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) if h.hunk[-1][0] != ' ': # if the hunk tried to put something at the bottom of the file # override the start line and use eof here search_start = len(self.lines) else: search_start = orig_start + self.skew for fuzzlen in xrange(3): for toponly in [True, False]: old = h.old(fuzzlen, toponly) cand = self.findlines(old[0][1:], search_start) for l in cand: if diffhelpers.testhunk(old, self.lines, l) == 0: newlines = h.new(fuzzlen, toponly) self.lines[l : l + len(old)] = newlines self.offset += len(newlines) - 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 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, foo, self.lena, self.startb, foo2, 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) diffhelpers.addlines(lr, self.hunk, self.lena, self.lenb, self.a, self.b) # 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) foo, self.starta, foo2, aend, foo3 = 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) foo, self.startb, foo2, bend, foo3 = 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.fix_newline(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, l, 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(l)-1) 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][0] == ' ': top += 1 else: break if not toponly: for x in xrange(hlen - 1): if self.hunk[hlen - bot - 1][0] == ' ': bot += 1 else: break # top and bot now count context in the hunk # adjust them if either one is short context = max(top, bot, 3) if bot < context: bot = max(0, fuzz - (context - bot)) else: bot = min(fuzz, bot) if top < context: top = max(0, fuzz - (context - top)) else: top = min(fuzz, top) return l[top:len(l)-bot] return l def old(self, fuzz=0, toponly=False): return self.fuzzit(self.a, fuzz, toponly) def new(self, fuzz=0, toponly=False): return self.fuzzit(self.b, fuzz, toponly) class binhunk: 'A binary patch file. Only understands literals so far.' def __init__(self, lr): self.text = None self.hunk = ['GIT binary patch\n'] self._read(lr) def complete(self): return self.text is not None def new(self): return [self.text] def _read(self, lr): line = lr.readline() self.hunk.append(line) while line and not line.startswith('literal '): line = lr.readline() self.hunk.append(line) if not line: raise PatchError(_('could not extract binary patch')) size = int(line[8:].rstrip()) dec = [] line = lr.readline() self.hunk.append(line) while len(line) > 1: l = line[0] if l <= 'Z' and l >= 'A': l = ord(l) - ord('A') + 1 else: l = ord(l) - ord('a') + 27 dec.append(base85.b85decode(line[1:-1])[:l]) line = lr.readline() self.hunk.append(line) text = zlib.decompress(''.join(dec)) if len(text) != size: raise PatchError(_('binary patch is %d bytes, not %d') % 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 pathstrip(path, strip): pathlen = len(path) i = 0 if strip == 0: return '', 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 count -= 1 return path[:i].lstrip(), path[i:].rstrip() def selectfile(backend, afile_orig, bfile_orig, hunk, strip, gp): if gp: # Git patches do not play games. Excluding copies from the # following heuristic avoids a lot of confusion fname = pathstrip(gp.path, strip - 1)[1] create = gp.op in ('ADD', 'COPY', 'RENAME') remove = gp.op == 'DELETE' missing = not create and not backend.exists(fname) return fname, create, remove 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 = pathstrip(afile_orig, strip) gooda = not nulla and backend.exists(afile) bbase, bfile = pathstrip(bfile_orig, strip) 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: fname = isbackup and afile or bfile elif gooda: fname = afile if not fname: if not nullb: fname = isbackup and afile or bfile elif not nulla: fname = afile else: raise PatchError(_("undefined source and destination files")) return fname, create, remove 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 = cStringIO.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) while True: x = lr.readline() if not x: break if state == BFILE and ( (not context and x[0] == '@') or (context is not False and x.startswith('***************')) or x.startswith('GIT binary patch')): gp = None if gitpatches and gitpatches[-1][0] == bfile: gp = gitpatches.pop()[1] if x.startswith('GIT binary patch'): h = binhunk(lr) 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) yield 'hunk', h elif x.startswith('diff --git'): m = gitre.match(x) if not m: continue if gitpatches is None: # scan whole input for git metadata gitpatches = [('b/' + gp.path, gp) for gp in scangitpatch(lr, x)] yield 'git', [g[1] for g in gitpatches if g[1].op in ('COPY', 'RENAME')] gitpatches.reverse() afile = 'a/' + m.group(1) bfile = 'b/' + m.group(2) while bfile != gitpatches[-1][0]: gp = gitpatches.pop()[1] yield 'file', ('a/' + gp.path, 'b/' + gp.path, None, gp) gp = gitpatches[-1][1] # copy/rename + modify should modify target, not source if gp.op in ('COPY', 'DELETE', 'RENAME', 'ADD') or gp.mode: afile = bfile 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()[1] yield 'file', ('a/' + gp.path, 'b/' + gp.path, None, gp) def applydiff(ui, fp, changed, backend, store, strip=1, eolmode='strict'): """Reads a patch from fp and tries to apply it. The dict 'changed' is filled in with all of the filenames changed by the patch. 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, changed, strip=strip, eolmode=eolmode) def _applydiff(ui, fp, patcher, backend, store, changed, strip=1, eolmode='strict'): def pstrip(p): return pathstrip(p, strip - 1)[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: changed.setdefault(current_file.fname, None) if ret > 0: err = 1 elif state == 'file': if current_file: rejects += current_file.close() current_file = None afile, bfile, first_hunk, gp = values copysource = None if gp: path = pstrip(gp.path) if gp.oldpath: copysource = pstrip(gp.oldpath) changed[path] = gp if gp.op == 'DELETE': backend.unlink(path) continue if gp.op == 'RENAME': backend.unlink(copysource) if not first_hunk: data, mode = None, None if gp.op in ('RENAME', 'COPY'): data, mode = store.getfile(copysource) 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(path)): raise PatchError(_("cannot create %s: destination " "already exists") % path) backend.setfile(path, data, mode, copysource) if not first_hunk: continue try: mode = gp and gp.mode or None current_file, create, remove = selectfile( backend, afile, bfile, first_hunk, strip, gp) current_file = patcher(ui, current_file, backend, store, mode, create, remove, eolmode=eolmode, copysource=copysource) except PatchError, 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) store.setfile(path, data, mode) else: raise util.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 to apply to the working directory. returns whether patch was applied with fuzz factor.""" fuzz = False args = [] cwd = repo.root if cwd: args.append('-d %s' % util.shellquote(cwd)) fp = util.popen('%s %s -p%d < %s' % (patcher, ' '.join(args), strip, util.shellquote(patchname))) try: for line in fp: line = line.rstrip() ui.note(line + '\n') if line.startswith('patching file '): pf = util.parsepatchoutput(line) printed_file = False files.setdefault(pf, None) 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: cfiles = list(files) cwd = repo.getcwd() if cwd: cfiles = [util.pathto(repo.root, cwd, f) for f in cfile] scmutil.addremove(repo, cfiles, similarity=similarity) code = fp.close() if code: raise PatchError(_("patch command failed: %s") % util.explainexit(code)[0]) return fuzz def internalpatch(ui, repo, patchobj, strip, files=None, eolmode='strict', similarity=0): """use builtin patch to apply to the working directory. returns whether patch was applied with fuzz factor.""" if files is None: files = {} if eolmode is None: eolmode = ui.config('patch', 'eol', 'strict') if eolmode.lower() not in eolmodes: raise util.Abort(_('unsupported line endings type: %s') % eolmode) eolmode = eolmode.lower() store = filestore() backend = workingbackend(ui, repo, similarity) try: fp = open(patchobj, 'rb') except TypeError: fp = patchobj try: ret = applydiff(ui, fp, files, backend, store, strip=strip, eolmode=eolmode) finally: if fp != patchobj: fp.close() files.update(dict.fromkeys(backend.close())) store.close() if ret < 0: raise PatchError(_('patch failed to apply')) return ret > 0 def patch(ui, repo, patchname, strip=1, files=None, eolmode='strict', similarity=0): """Apply 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 = {} try: if patcher: return _externalpatch(ui, repo, patcher, patchname, strip, files, similarity) return internalpatch(ui, repo, patchname, strip, files, eolmode, similarity) except PatchError, err: raise util.Abort(str(err)) def changedfiles(ui, repo, patchpath, strip=1): backend = fsbackend(ui, repo.root) fp = open(patchpath, 'rb') try: changed = set() for state, values in iterhunks(fp): if state == 'file': afile, bfile, first_hunk, gp = values if gp: changed.add(pathstrip(gp.path, strip - 1)[1]) if gp.op == 'RENAME': changed.add(pathstrip(gp.oldpath, strip - 1)[1]) if not first_hunk: continue current_file, create, remove = selectfile( backend, afile, bfile, first_hunk, strip, gp) changed.add(current_file) elif state not in ('hunk', 'git'): raise util.Abort(_('unsupported parser state: %s') % state) return changed finally: fp.close() def b85diff(to, tn): '''print base85-encoded binary diff''' def gitindex(text): if not text: return hex(nullid) l = len(text) s = util.sha1('blob %d\0' % l) s.update(text) return s.hexdigest() def fmtline(line): l = len(line) if l <= 26: l = chr(ord('A') + l - 1) else: l = chr(l - 26 + ord('a') - 1) return '%c%s\n' % (l, base85.b85encode(line, True)) def chunk(text, csize=52): l = len(text) i = 0 while i < l: yield text[i:i + csize] i += csize tohash = gitindex(to) tnhash = gitindex(tn) if tohash == tnhash: return "" # TODO: deltas ret = ['index %s..%s\nGIT binary patch\nliteral %s\n' % (tohash, tnhash, len(tn))] for l in chunk(zlib.compress(tn)): ret.append(fmtline(l)) ret.append('\n') return ''.join(ret) class GitDiffRequired(Exception): pass def diffopts(ui, opts=None, untrusted=False): def get(key, name=None, getter=ui.configbool): return ((opts and opts.get(key)) or getter('diff', name or key, None, untrusted=untrusted)) return mdiff.diffopts( text=opts and opts.get('text'), git=get('git'), nodates=get('nodates'), showfunc=get('show_function', 'showfunc'), ignorews=get('ignore_all_space', 'ignorews'), ignorewsamount=get('ignore_space_change', 'ignorewsamount'), ignoreblanklines=get('ignore_blank_lines', 'ignoreblanklines'), context=get('unified', getter=ui.config)) def diff(repo, node1=None, node2=None, match=None, changes=None, opts=None, losedatafn=None, prefix=''): '''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). ''' if opts is None: opts = mdiff.defaultopts if not node1 and not node2: node1 = repo.dirstate.p1() def lrugetfilectx(): cache = {} order = [] def getfilectx(f, ctx): fctx = ctx.filectx(f, filelog=cache.get(f)) if f not in cache: if len(cache) > 20: del cache[order.pop(0)] cache[f] = fctx.filelog() else: order.remove(f) order.append(f) return fctx return getfilectx getfilectx = lrugetfilectx() ctx1 = repo[node1] ctx2 = repo[node2] 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 [] revs = None if not repo.ui.quiet: hexfunc = repo.ui.debugflag and hex or short revs = [hexfunc(node) for node in [node1, node2] if node] copy = {} if opts.git or opts.upgrade: copy = copies.copies(repo, ctx1, ctx2, repo[nullid])[0] difffn = lambda opts, losedata: trydiff(repo, revs, ctx1, ctx2, modified, added, removed, copy, getfilectx, opts, losedata, prefix) 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 difflabel(func, *args, **kw): '''yields 2-tuples of (output, label) based on the output of func()''' prefixes = [('diff', 'diff.diffline'), ('copy', 'diff.extended'), ('rename', 'diff.extended'), ('old', 'diff.extended'), ('new', 'diff.extended'), ('deleted', 'diff.extended'), ('---', 'diff.file_a'), ('+++', 'diff.file_b'), ('@@', 'diff.hunk'), ('-', 'diff.deleted'), ('+', 'diff.inserted')] for chunk in func(*args, **kw): lines = chunk.split('\n') for i, line in enumerate(lines): if i != 0: yield ('\n', '') stripline = line if line and line[0] in '+-': # highlight trailing whitespace, but only in changed lines stripline = line.rstrip() for prefix, label in prefixes: if stripline.startswith(prefix): yield (stripline, label) break else: yield (line, '') if line != stripline: yield (line[len(stripline):], 'diff.trailingwhitespace') def diffui(*args, **kw): '''like diff(), but yields 2-tuples of (output, label) for ui.write()''' return difflabel(diff, *args, **kw) def _addmodehdr(header, omode, nmode): if omode != nmode: header.append('old mode %s\n' % omode) header.append('new mode %s\n' % nmode) def trydiff(repo, revs, ctx1, ctx2, modified, added, removed, copy, getfilectx, opts, losedatafn, prefix): def join(f): return os.path.join(prefix, f) date1 = util.datestr(ctx1.date()) man1 = ctx1.manifest() gone = set() gitmode = {'l': '120000', 'x': '100755', '': '100644'} copyto = dict([(v, k) for k, v in copy.items()]) if opts.git: revs = None for f in sorted(modified + added + removed): to = None tn = None dodiff = True header = [] if f in man1: to = getfilectx(f, ctx1).data() if f not in removed: tn = getfilectx(f, ctx2).data() a, b = f, f if opts.git or losedatafn: if f in added: mode = gitmode[ctx2.flags(f)] if f in copy or f in copyto: if opts.git: if f in copy: a = copy[f] else: a = copyto[f] omode = gitmode[man1.flags(a)] _addmodehdr(header, omode, mode) if a in removed and a not in gone: op = 'rename' gone.add(a) else: op = 'copy' header.append('%s from %s\n' % (op, join(a))) header.append('%s to %s\n' % (op, join(f))) to = getfilectx(a, ctx1).data() else: losedatafn(f) else: if opts.git: header.append('new file mode %s\n' % mode) elif ctx2.flags(f): losedatafn(f) # In theory, if tn was copied or renamed we should check # if the source is binary too but the copy record already # forces git mode. if util.binary(tn): if opts.git: dodiff = 'binary' else: losedatafn(f) if not opts.git and not tn: # regular diffs cannot represent new empty file losedatafn(f) elif f in removed: if opts.git: # have we already reported a copy above? if ((f in copy and copy[f] in added and copyto[copy[f]] == f) or (f in copyto and copyto[f] in added and copy[copyto[f]] == f)): dodiff = False else: header.append('deleted file mode %s\n' % gitmode[man1.flags(f)]) elif not to or util.binary(to): # regular diffs cannot represent empty file deletion losedatafn(f) else: oflag = man1.flags(f) nflag = ctx2.flags(f) binary = util.binary(to) or util.binary(tn) if opts.git: _addmodehdr(header, gitmode[oflag], gitmode[nflag]) if binary: dodiff = 'binary' elif binary or nflag != oflag: losedatafn(f) if opts.git: header.insert(0, mdiff.diffline(revs, join(a), join(b), opts)) if dodiff: if dodiff == 'binary': text = b85diff(to, tn) else: text = mdiff.unidiff(to, date1, # ctx2 date may be dynamic tn, util.datestr(ctx2.date()), join(a), join(b), revs, opts=opts) if header and (text or len(header) > 1): yield ''.join(header) if text: yield text 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 = None, 0, 0 def addresult(): if filename: isbinary = adds == 0 and removes == 0 results.append((filename, adds, removes, isbinary)) for line in lines: if line.startswith('diff'): addresult() # set numbers to 0 anyway when starting new file adds, removes = 0, 0 if line.startswith('diff --git'): filename = gitre.search(line).group(1) elif line.startswith('diff -r'): # format: "diff -r ... -r ... filename" filename = diffre.search(line).group(1) elif line.startswith('+') and not line.startswith('+++'): adds += 1 elif line.startswith('-') and not line.startswith('---'): removes += 1 addresult() return results def diffstat(lines, width=80, git=False): 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 git and isbinary: count = 'Bin' else: count = 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(r'\++', graph) if m: yield (m.group(0), 'diffstat.inserted') m = re.search(r'-+', graph) if m: yield (m.group(0), 'diffstat.deleted') else: yield (line, '') yield ('\n', '')