Mercurial > hg
view mercurial/patch.py @ 11578:bb7af1de5e38
discovery: remove duplication for new remote head discovery
author | Benoit Boissinot <benoit.boissinot@ens-lyon.org> |
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date | Thu, 15 Jul 2010 21:44:51 +0200 |
parents | 9916263d9a60 |
children | 4f5a6df2af92 |
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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. import cStringIO, email.Parser, os, re import tempfile, zlib from i18n import _ from node import hex, nullid, short import base85, cmdutil, mdiff, util, diffhelpers, copies gitre = re.compile('diff --git a/(.*) b/(.*)') class PatchError(Exception): pass class NoHunks(PatchError): pass # helper functions def copyfile(src, dst, basedir): abssrc, absdst = [util.canonpath(basedir, basedir, x) for x in [src, dst]] if os.path.exists(absdst): raise util.Abort(_("cannot create %s: destination already exists") % dst) dstdir = os.path.dirname(absdst) if dstdir and not os.path.isdir(dstdir): try: os.makedirs(dstdir) except IOError: raise util.Abort( _("cannot create %s: unable to create destination directory") % dst) util.copyfile(abssrc, absdst) # 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, 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 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'): ui.debug('patch generated by hg export\n') hgpatch = True # drop earlier commit message content cfp.seek(0) cfp.truncate() subject = None elif hgpatch: 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 line == '---' and gitsendmail: ignoretext = True if not line.startswith('# ') 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 GP_PATCH = 1 << 0 # we have to run patch GP_FILTER = 1 << 1 # there's some copy/rename operation GP_BINARY = 1 << 2 # there's a binary patch 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.lineno = 0 self.binary = False def setmode(self, mode): islink = mode & 020000 isexec = mode & 0100 self.mode = (islink, isexec) 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 = [] # Can have a git patch with only metadata, causing patch to complain dopatch = 0 lineno = 0 for line in lr: lineno += 1 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) gp.lineno = lineno elif gp: if line.startswith('--- '): if gp.op in ('COPY', 'RENAME'): dopatch |= GP_FILTER gitpatches.append(gp) gp = None dopatch |= GP_PATCH 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'): dopatch |= GP_BINARY gp.binary = True if gp: gitpatches.append(gp) if not gitpatches: dopatch = GP_PATCH return (dopatch, gitpatches) class linereader(object): # simple class to allow pushing lines back into the input stream def __init__(self, fp, textmode=False): self.fp = fp self.buf = [] self.textmode = textmode self.eol = None 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 l = self.fp.readline() if not self.eol: if l.endswith('\r\n'): self.eol = '\r\n' elif l.endswith('\n'): self.eol = '\n' if self.textmode and l.endswith('\r\n'): l = l[:-2] + '\n' return l def __iter__(self): while 1: l = self.readline() if not l: break yield l # @@ -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, opener, missing=False, eolmode='strict'): self.fname = fname self.eolmode = eolmode self.eol = None self.opener = opener self.ui = ui self.lines = [] self.exists = False self.missing = missing if not missing: try: self.lines = self.readlines(fname) self.exists = True except IOError: pass else: 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 readlines(self, fname): if os.path.islink(fname): return [os.readlink(fname)] fp = self.opener(fname, 'r') try: lr = linereader(fp, self.eolmode != 'strict') lines = list(lr) self.eol = lr.eol return lines finally: fp.close() def writelines(self, fname, lines): # Ensure supplied data ends in fname, being a regular file or # a symlink. updatedir() will -too magically- take care of # setting it to the proper type afterwards. islink = os.path.islink(fname) if islink: fp = cStringIO.StringIO() else: fp = self.opener(fname, 'w') try: 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': for l in lines: if l and l[-1] == '\n': l = l[:-1] + eol fp.write(l) else: fp.writelines(lines) if islink: self.opener.symlink(fp.getvalue(), fname) finally: fp.close() def unlink(self, fname): os.unlink(fname) 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 hashlines(self): self.hash = {} for x, s in enumerate(self.lines): self.hash.setdefault(s, []).append(x) 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 fname = self.fname + ".rej" self.ui.warn( _("%d out of %d hunks FAILED -- saving rejects to file %s\n") % (len(self.rej), self.hunks, fname)) def rejlines(): base = os.path.basename(self.fname) yield "--- %s\n+++ %s\n" % (base, base) for x in self.rej: for l in x.hunk: yield l if l[-1] != '\n': yield "\n\ No newline at end of file\n" self.writelines(fname, rejlines()) 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 h.createfile(): self.ui.warn(_("file %s already exists\n") % self.fname) self.rej.append(h) return -1 if isinstance(h, binhunk): if h.rmfile(): self.unlink(self.fname) else: self.lines[:] = h.new() self.offset += len(h.new()) self.dirty = 1 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 h.rmfile(): self.unlink(self.fname) else: self.lines[start : start + h.lena] = h.new() self.offset += h.lenb - h.lena self.dirty = 1 return 0 # ok, we couldn't match the hunk. Lets look for offsets and fuzz it self.hashlines() 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 = 1 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 class hunk(object): def __init__(self, desc, num, lr, context, create=False, remove=False): 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) self.create = create self.remove = remove and not create 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, False, False) 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 nh.create = self.create nh.remove = self.remove 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 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('---'): 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('\ '): s = self.b[-1][:-1] self.b[-1] = s self.hunk[hunki - 1] = s continue if not l: 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: # this can happen when the hunk does not add any lines 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 def fix_newline(self): diffhelpers.fix_newline(self.hunk, self.a, self.b) def complete(self): return len(self.a) == self.lena and len(self.b) == self.lenb def createfile(self): return self.starta == 0 and self.lena == 0 and self.create def rmfile(self): return self.startb == 0 and self.lenb == 0 and self.remove 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, gitpatch): self.gitpatch = gitpatch self.text = None self.hunk = ['GIT binary patch\n'] def createfile(self): return self.gitpatch.op in ('ADD', 'RENAME', 'COPY') def rmfile(self): return self.gitpatch.op == 'DELETE' def complete(self): return self.text is not None def new(self): return [self.text] def extract(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(afile_orig, bfile_orig, hunk, strip): nulla = afile_orig == "/dev/null" nullb = bfile_orig == "/dev/null" abase, afile = pathstrip(afile_orig, strip) gooda = not nulla and util.lexists(afile) bbase, bfile = pathstrip(bfile_orig, strip) if afile == bfile: goodb = gooda else: goodb = not nullb and os.path.exists(bfile) createfunc = hunk.createfile missing = not goodb and not gooda and not createfunc() # some diff programs apparently produce create 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): # this isn't very pretty hunk.create = True if createfunc(): missing = False else: hunk.create = 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, missing 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, lr.textmode) gitlr.push(firstline) (dopatch, gitpatches) = readgitpatch(gitlr) fp.seek(pos) return dopatch, gitpatches def iterhunks(ui, fp, sourcefile=None): """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. """ changed = {} current_hunk = None afile = "" bfile = "" state = None hunknum = 0 emitfile = False git = False # our states BFILE = 1 context = None lr = linereader(fp) # gitworkdone is True if a git operation (copy, rename, ...) was # performed already for the current file. Useful when the file # section may have no hunk. gitworkdone = False empty = None while True: newfile = newgitfile = False x = lr.readline() if not x: break if current_hunk: if x.startswith('\ '): current_hunk.fix_newline() yield 'hunk', current_hunk current_hunk = None empty = False if ((sourcefile or state == BFILE) and ((not context and x[0] == '@') or ((context is not False) and x.startswith('***************')))): try: if context is None and x.startswith('***************'): context = True gpatch = changed.get(bfile) create = afile == '/dev/null' or gpatch and gpatch.op == 'ADD' remove = bfile == '/dev/null' or gpatch and gpatch.op == 'DELETE' current_hunk = hunk(x, hunknum + 1, lr, context, create, remove) except PatchError, err: ui.debug(err) current_hunk = None continue hunknum += 1 if emitfile: emitfile = False yield 'file', (afile, bfile, current_hunk) empty = False elif state == BFILE and x.startswith('GIT binary patch'): current_hunk = binhunk(changed[bfile]) hunknum += 1 if emitfile: emitfile = False yield 'file', ('a/' + afile, 'b/' + bfile, current_hunk) empty = False current_hunk.extract(lr) elif x.startswith('diff --git'): # check for git diff, scanning the whole patch file if needed m = gitre.match(x) gitworkdone = False if m: afile, bfile = m.group(1, 2) if not git: git = True gitpatches = scangitpatch(lr, x)[1] yield 'git', gitpatches for gp in gitpatches: changed[gp.path] = gp # else error? # copy/rename + modify should modify target, not source gp = changed.get(bfile) if gp and (gp.op in ('COPY', 'DELETE', 'RENAME', 'ADD') or gp.mode): afile = bfile gitworkdone = True newgitfile = 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: if empty: raise NoHunks empty = not gitworkdone gitworkdone = False if newgitfile or newfile: emitfile = True state = BFILE hunknum = 0 if current_hunk: if current_hunk.complete(): yield 'hunk', current_hunk empty = False else: raise PatchError(_("malformed patch %s %s") % (afile, current_hunk.desc)) if (empty is None and not gitworkdone) or empty: raise NoHunks def applydiff(ui, fp, changed, strip=1, sourcefile=None, 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'. Callers probably want to call 'updatedir' after this to apply certain categories of changes not done by this function. """ return _applydiff( ui, fp, patchfile, copyfile, changed, strip=strip, sourcefile=sourcefile, eolmode=eolmode) def _applydiff(ui, fp, patcher, copyfn, changed, strip=1, sourcefile=None, eolmode='strict'): rejects = 0 err = 0 current_file = None cwd = os.getcwd() opener = util.opener(cwd) def closefile(): if not current_file: return 0 if current_file.dirty: current_file.writelines(current_file.fname, current_file.lines) current_file.write_rej() return len(current_file.rej) for state, values in iterhunks(ui, fp, sourcefile): 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': rejects += closefile() afile, bfile, first_hunk = values try: if sourcefile: current_file = patcher(ui, sourcefile, opener, eolmode=eolmode) else: current_file, missing = selectfile(afile, bfile, first_hunk, strip) current_file = patcher(ui, current_file, opener, missing=missing, eolmode=eolmode) except PatchError, err: ui.warn(str(err) + '\n') current_file = None rejects += 1 continue elif state == 'git': for gp in values: gp.path = pathstrip(gp.path, strip - 1)[1] if gp.oldpath: gp.oldpath = pathstrip(gp.oldpath, strip - 1)[1] if gp.op in ('COPY', 'RENAME'): copyfn(gp.oldpath, gp.path, cwd) changed[gp.path] = gp else: raise util.Abort(_('unsupported parser state: %s') % state) rejects += closefile() if rejects: return -1 return err def updatedir(ui, repo, patches, similarity=0): '''Update dirstate after patch application according to metadata''' if not patches: return copies = [] removes = set() cfiles = patches.keys() cwd = repo.getcwd() if cwd: cfiles = [util.pathto(repo.root, cwd, f) for f in patches.keys()] for f in patches: gp = patches[f] if not gp: continue if gp.op == 'RENAME': copies.append((gp.oldpath, gp.path)) removes.add(gp.oldpath) elif gp.op == 'COPY': copies.append((gp.oldpath, gp.path)) elif gp.op == 'DELETE': removes.add(gp.path) wctx = repo[None] for src, dst in copies: wctx.copy(src, dst) if (not similarity) and removes: wctx.remove(sorted(removes), True) for f in patches: gp = patches[f] if gp and gp.mode: islink, isexec = gp.mode dst = repo.wjoin(gp.path) # patch won't create empty files if gp.op == 'ADD' and not os.path.exists(dst): flags = (isexec and 'x' or '') + (islink and 'l' or '') repo.wwrite(gp.path, '', flags) util.set_flags(dst, islink, isexec) cmdutil.addremove(repo, cfiles, similarity=similarity) files = patches.keys() files.extend([r for r in removes if r not in files]) return sorted(files) def externalpatch(patcher, args, patchname, ui, strip, cwd, files): """use <patcher> to apply <patchname> to the working directory. returns whether patch was applied with fuzz factor.""" fuzz = False if cwd: args.append('-d %s' % util.shellquote(cwd)) fp = util.popen('%s %s -p%d < %s' % (patcher, ' '.join(args), strip, util.shellquote(patchname))) for line in fp: line = line.rstrip() ui.note(line + '\n') if line.startswith('patching file '): pf = util.parse_patch_output(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') code = fp.close() if code: raise PatchError(_("patch command failed: %s") % util.explain_exit(code)[0]) return fuzz def internalpatch(patchobj, ui, strip, cwd, files=None, eolmode='strict'): """use builtin patch to apply <patchobj> 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() try: fp = open(patchobj, 'rb') except TypeError: fp = patchobj if cwd: curdir = os.getcwd() os.chdir(cwd) try: ret = applydiff(ui, fp, files, strip=strip, eolmode=eolmode) finally: if cwd: os.chdir(curdir) if fp != patchobj: fp.close() if ret < 0: raise PatchError return ret > 0 def patch(patchname, ui, strip=1, cwd=None, files=None, eolmode='strict'): """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') args = [] if files is None: files = {} try: if patcher: return externalpatch(patcher, args, patchname, ui, strip, cwd, files) else: try: return internalpatch(patchname, ui, strip, cwd, files, eolmode) except NoHunks: ui.warn(_('internal patcher failed\n' 'please report details to ' 'http://mercurial.selenic.com/bts/\n' 'or mercurial@selenic.com\n')) patcher = (util.find_exe('gpatch') or util.find_exe('patch') or 'patch') ui.debug('no valid hunks found; trying with %r instead\n' % patcher) if util.needbinarypatch(): args.append('--binary') return externalpatch(patcher, args, patchname, ui, strip, cwd, files) except PatchError, err: s = str(err) if s: raise util.Abort(s) else: raise util.Abort(_('patch failed to apply')) def b85diff(to, tn): '''print base85-encoded binary diff''' def gitindex(text): if not text: return '0' * 40 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): '''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. ''' if opts is None: opts = mdiff.defaultopts if not node1 and not node2: node1 = repo.dirstate.parents()[0] 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) 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): 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, a)) header.append('%s to %s\n' % (op, 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) 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: # 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, a, 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()), a, b, revs, opts=opts) if header and (text or len(header) > 1): yield ''.join(header) if text: yield text def diffstatdata(lines): filename, adds, removes = None, 0, 0 for line in lines: if line.startswith('diff'): if filename: isbinary = adds == 0 and removes == 0 yield (filename, adds, removes, isbinary) # set numbers to 0 anyway when starting new file adds, removes = 0, 0 if line.startswith('diff --git'): filename = gitre.search(line).group(1) else: # format: "diff -r ... -r ... filename" filename = line.split(None, 5)[-1] elif line.startswith('+') and not line.startswith('+++'): adds += 1 elif line.startswith('-') and not line.startswith('---'): removes += 1 if filename: isbinary = adds == 0 and removes == 0 yield (filename, adds, removes, isbinary) def diffstat(lines, width=80, git=False): output = [] stats = list(diffstatdata(lines)) maxtotal, maxname = 0, 0 totaladds, totalremoves = 0, 0 hasbinary = False for filename, adds, removes, isbinary in stats: totaladds += adds totalremoves += removes maxname = max(maxname, len(filename)) maxtotal = max(maxtotal, adds + removes) if isbinary: hasbinary = True 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\n' % (maxname, 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', '')