# absorb.py # # Copyright 2016 Facebook, Inc. # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. """apply working directory changes to changesets (EXPERIMENTAL) The absorb extension provides a command to use annotate information to amend modified chunks into the corresponding non-public changesets. :: [absorb] # only check 50 recent non-public changesets at most max-stack-size = 50 # whether to add noise to new commits to avoid obsolescence cycle add-noise = 1 # make `amend --correlated` a shortcut to the main command amend-flag = correlated [color] absorb.description = yellow absorb.node = blue bold absorb.path = bold """ # TODO: # * Rename config items to [commands] namespace # * Converge getdraftstack() with other code in core # * move many attributes on fixupstate to be private from __future__ import absolute_import import collections from mercurial.i18n import _ from mercurial import ( cmdutil, commands, context, crecord, error, linelog, mdiff, node, obsolete, patch, phases, pycompat, registrar, repair, scmutil, util, ) from mercurial.utils import ( stringutil, ) # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should # be specifying the version(s) of Mercurial they are tested with, or # leave the attribute unspecified. testedwith = 'ships-with-hg-core' cmdtable = {} command = registrar.command(cmdtable) configtable = {} configitem = registrar.configitem(configtable) configitem('absorb', 'add-noise', default=True) configitem('absorb', 'amend-flag', default=None) configitem('absorb', 'max-stack-size', default=50) colortable = { 'absorb.description': 'yellow', 'absorb.node': 'blue bold', 'absorb.path': 'bold', } defaultdict = collections.defaultdict class nullui(object): """blank ui object doing nothing""" debugflag = False verbose = False quiet = True def __getitem__(name): def nullfunc(*args, **kwds): return return nullfunc class emptyfilecontext(object): """minimal filecontext representing an empty file""" def data(self): return '' def node(self): return node.nullid def uniq(lst): """list -> list. remove duplicated items without changing the order""" seen = set() result = [] for x in lst: if x not in seen: seen.add(x) result.append(x) return result def getdraftstack(headctx, limit=None): """(ctx, int?) -> [ctx]. get a linear stack of non-public changesets. changesets are sorted in topo order, oldest first. return at most limit items, if limit is a positive number. merges are considered as non-draft as well. i.e. every commit returned has and only has 1 parent. """ ctx = headctx result = [] while ctx.phase() != phases.public: if limit and len(result) >= limit: break parents = ctx.parents() if len(parents) != 1: break result.append(ctx) ctx = parents[0] result.reverse() return result def getfilestack(stack, path, seenfctxs=None): """([ctx], str, set) -> [fctx], {ctx: fctx} stack is a list of contexts, from old to new. usually they are what "getdraftstack" returns. follows renames, but not copies. seenfctxs is a set of filecontexts that will be considered "immutable". they are usually what this function returned in earlier calls, useful to avoid issues that a file was "moved" to multiple places and was then modified differently, like: "a" was copied to "b", "a" was also copied to "c" and then "a" was deleted, then both "b" and "c" were "moved" from "a" and we enforce only one of them to be able to affect "a"'s content. return an empty list and an empty dict, if the specified path does not exist in stack[-1] (the top of the stack). otherwise, return a list of de-duplicated filecontexts, and the map to convert ctx in the stack to fctx, for possible mutable fctxs. the first item of the list would be outside the stack and should be considered immutable. the remaining items are within the stack. for example, given the following changelog and corresponding filelog revisions: changelog: 3----4----5----6----7 filelog: x 0----1----1----2 (x: no such file yet) - if stack = [5, 6, 7], returns ([0, 1, 2], {5: 1, 6: 1, 7: 2}) - if stack = [3, 4, 5], returns ([e, 0, 1], {4: 0, 5: 1}), where "e" is a dummy empty filecontext. - if stack = [2], returns ([], {}) - if stack = [7], returns ([1, 2], {7: 2}) - if stack = [6, 7], returns ([1, 2], {6: 1, 7: 2}), although {6: 1} can be removed, since 1 is immutable. """ if seenfctxs is None: seenfctxs = set() assert stack if path not in stack[-1]: return [], {} fctxs = [] fctxmap = {} pctx = stack[0].p1() # the public (immutable) ctx we stop at for ctx in reversed(stack): if path not in ctx: # the file is added in the next commit pctx = ctx break fctx = ctx[path] fctxs.append(fctx) if fctx in seenfctxs: # treat fctx as the immutable one pctx = None # do not add another immutable fctx break fctxmap[ctx] = fctx # only for mutable fctxs renamed = fctx.renamed() if renamed: path = renamed[0] # follow rename if path in ctx: # but do not follow copy pctx = ctx.p1() break if pctx is not None: # need an extra immutable fctx if path in pctx: fctxs.append(pctx[path]) else: fctxs.append(emptyfilecontext()) fctxs.reverse() # note: we rely on a property of hg: filerev is not reused for linear # history. i.e. it's impossible to have: # changelog: 4----5----6 (linear, no merges) # filelog: 1----2----1 # ^ reuse filerev (impossible) # because parents are part of the hash. if that's not true, we need to # remove uniq and find a different way to identify fctxs. return uniq(fctxs), fctxmap class overlaystore(patch.filestore): """read-only, hybrid store based on a dict and ctx. memworkingcopy: {path: content}, overrides file contents. """ def __init__(self, basectx, memworkingcopy): self.basectx = basectx self.memworkingcopy = memworkingcopy def getfile(self, path): """comply with mercurial.patch.filestore.getfile""" if path not in self.basectx: return None, None, None fctx = self.basectx[path] if path in self.memworkingcopy: content = self.memworkingcopy[path] else: content = fctx.data() mode = (fctx.islink(), fctx.isexec()) renamed = fctx.renamed() # False or (path, node) return content, mode, (renamed and renamed[0]) def overlaycontext(memworkingcopy, ctx, parents=None, extra=None): """({path: content}, ctx, (p1node, p2node)?, {}?) -> memctx memworkingcopy overrides file contents. """ # parents must contain 2 items: (node1, node2) if parents is None: parents = ctx.repo().changelog.parents(ctx.node()) if extra is None: extra = ctx.extra() date = ctx.date() desc = ctx.description() user = ctx.user() files = set(ctx.files()).union(memworkingcopy) store = overlaystore(ctx, memworkingcopy) return context.memctx( repo=ctx.repo(), parents=parents, text=desc, files=files, filectxfn=store, user=user, date=date, branch=None, extra=extra) class filefixupstate(object): """state needed to apply fixups to a single file internally, it keeps file contents of several revisions and a linelog. the linelog uses odd revision numbers for original contents (fctxs passed to __init__), and even revision numbers for fixups, like: linelog rev 1: self.fctxs[0] (from an immutable "public" changeset) linelog rev 2: fixups made to self.fctxs[0] linelog rev 3: self.fctxs[1] (a child of fctxs[0]) linelog rev 4: fixups made to self.fctxs[1] ... a typical use is like: 1. call diffwith, to calculate self.fixups 2. (optionally), present self.fixups to the user, or change it 3. call apply, to apply changes 4. read results from "finalcontents", or call getfinalcontent """ def __init__(self, fctxs, path, ui=None, opts=None): """([fctx], ui or None) -> None fctxs should be linear, and sorted by topo order - oldest first. fctxs[0] will be considered as "immutable" and will not be changed. """ self.fctxs = fctxs self.path = path self.ui = ui or nullui() self.opts = opts or {} # following fields are built from fctxs. they exist for perf reason self.contents = [f.data() for f in fctxs] self.contentlines = pycompat.maplist(mdiff.splitnewlines, self.contents) self.linelog = self._buildlinelog() if self.ui.debugflag: assert self._checkoutlinelog() == self.contents # following fields will be filled later self.chunkstats = [0, 0] # [adopted, total : int] self.targetlines = [] # [str] self.fixups = [] # [(linelog rev, a1, a2, b1, b2)] self.finalcontents = [] # [str] self.ctxaffected = set() def diffwith(self, targetfctx, fm=None): """calculate fixups needed by examining the differences between self.fctxs[-1] and targetfctx, chunk by chunk. targetfctx is the target state we move towards. we may or may not be able to get there because not all modified chunks can be amended into a non-public fctx unambiguously. call this only once, before apply(). update self.fixups, self.chunkstats, and self.targetlines. """ a = self.contents[-1] alines = self.contentlines[-1] b = targetfctx.data() blines = mdiff.splitnewlines(b) self.targetlines = blines self.linelog.annotate(self.linelog.maxrev) annotated = self.linelog.annotateresult # [(linelog rev, linenum)] assert len(annotated) == len(alines) # add a dummy end line to make insertion at the end easier if annotated: dummyendline = (annotated[-1][0], annotated[-1][1] + 1) annotated.append(dummyendline) # analyse diff blocks for chunk in self._alldiffchunks(a, b, alines, blines): newfixups = self._analysediffchunk(chunk, annotated) self.chunkstats[0] += bool(newfixups) # 1 or 0 self.chunkstats[1] += 1 self.fixups += newfixups if fm is not None: self._showchanges(fm, alines, blines, chunk, newfixups) def apply(self): """apply self.fixups. update self.linelog, self.finalcontents. call this only once, before getfinalcontent(), after diffwith(). """ # the following is unnecessary, as it's done by "diffwith": # self.linelog.annotate(self.linelog.maxrev) for rev, a1, a2, b1, b2 in reversed(self.fixups): blines = self.targetlines[b1:b2] if self.ui.debugflag: idx = (max(rev - 1, 0)) // 2 self.ui.write(_('%s: chunk %d:%d -> %d lines\n') % (node.short(self.fctxs[idx].node()), a1, a2, len(blines))) self.linelog.replacelines(rev, a1, a2, b1, b2) if self.opts.get('edit_lines', False): self.finalcontents = self._checkoutlinelogwithedits() else: self.finalcontents = self._checkoutlinelog() def getfinalcontent(self, fctx): """(fctx) -> str. get modified file content for a given filecontext""" idx = self.fctxs.index(fctx) return self.finalcontents[idx] def _analysediffchunk(self, chunk, annotated): """analyse a different chunk and return new fixups found return [] if no lines from the chunk can be safely applied. the chunk (or lines) cannot be safely applied, if, for example: - the modified (deleted) lines belong to a public changeset (self.fctxs[0]) - the chunk is a pure insertion and the adjacent lines (at most 2 lines) belong to different non-public changesets, or do not belong to any non-public changesets. - the chunk is modifying lines from different changesets. in this case, if the number of lines deleted equals to the number of lines added, assume it's a simple 1:1 map (could be wrong). otherwise, give up. - the chunk is modifying lines from a single non-public changeset, but other revisions touch the area as well. i.e. the lines are not continuous as seen from the linelog. """ a1, a2, b1, b2 = chunk # find involved indexes from annotate result involved = annotated[a1:a2] if not involved and annotated: # a1 == a2 and a is not empty # pure insertion, check nearby lines. ignore lines belong # to the public (first) changeset (i.e. annotated[i][0] == 1) nearbylinenums = {a2, max(0, a1 - 1)} involved = [annotated[i] for i in nearbylinenums if annotated[i][0] != 1] involvedrevs = list(set(r for r, l in involved)) newfixups = [] if len(involvedrevs) == 1 and self._iscontinuous(a1, a2 - 1, True): # chunk belongs to a single revision rev = involvedrevs[0] if rev > 1: fixuprev = rev + 1 newfixups.append((fixuprev, a1, a2, b1, b2)) elif a2 - a1 == b2 - b1 or b1 == b2: # 1:1 line mapping, or chunk was deleted for i in pycompat.xrange(a1, a2): rev, linenum = annotated[i] if rev > 1: if b1 == b2: # deletion, simply remove that single line nb1 = nb2 = 0 else: # 1:1 line mapping, change the corresponding rev nb1 = b1 + i - a1 nb2 = nb1 + 1 fixuprev = rev + 1 newfixups.append((fixuprev, i, i + 1, nb1, nb2)) return self._optimizefixups(newfixups) @staticmethod def _alldiffchunks(a, b, alines, blines): """like mdiff.allblocks, but only care about differences""" blocks = mdiff.allblocks(a, b, lines1=alines, lines2=blines) for chunk, btype in blocks: if btype != '!': continue yield chunk def _buildlinelog(self): """calculate the initial linelog based on self.content{,line}s. this is similar to running a partial "annotate". """ llog = linelog.linelog() a, alines = '', [] for i in pycompat.xrange(len(self.contents)): b, blines = self.contents[i], self.contentlines[i] llrev = i * 2 + 1 chunks = self._alldiffchunks(a, b, alines, blines) for a1, a2, b1, b2 in reversed(list(chunks)): llog.replacelines(llrev, a1, a2, b1, b2) a, alines = b, blines return llog def _checkoutlinelog(self): """() -> [str]. check out file contents from linelog""" contents = [] for i in pycompat.xrange(len(self.contents)): rev = (i + 1) * 2 self.linelog.annotate(rev) content = ''.join(map(self._getline, self.linelog.annotateresult)) contents.append(content) return contents def _checkoutlinelogwithedits(self): """() -> [str]. prompt all lines for edit""" alllines = self.linelog.getalllines() # header editortext = (_('HG: editing %s\nHG: "y" means the line to the right ' 'exists in the changeset to the top\nHG:\n') % self.fctxs[-1].path()) # [(idx, fctx)]. hide the dummy emptyfilecontext visiblefctxs = [(i, f) for i, f in enumerate(self.fctxs) if not isinstance(f, emptyfilecontext)] for i, (j, f) in enumerate(visiblefctxs): editortext += (_('HG: %s/%s %s %s\n') % ('|' * i, '-' * (len(visiblefctxs) - i + 1), node.short(f.node()), f.description().split('\n',1)[0])) editortext += _('HG: %s\n') % ('|' * len(visiblefctxs)) # figure out the lifetime of a line, this is relatively inefficient, # but probably fine lineset = defaultdict(lambda: set()) # {(llrev, linenum): {llrev}} for i, f in visiblefctxs: self.linelog.annotate((i + 1) * 2) for l in self.linelog.annotateresult: lineset[l].add(i) # append lines for l in alllines: editortext += (' %s : %s' % (''.join([('y' if i in lineset[l] else ' ') for i, _f in visiblefctxs]), self._getline(l))) # run editor editedtext = self.ui.edit(editortext, '', action='absorb') if not editedtext: raise error.Abort(_('empty editor text')) # parse edited result contents = ['' for i in self.fctxs] leftpadpos = 4 colonpos = leftpadpos + len(visiblefctxs) + 1 for l in mdiff.splitnewlines(editedtext): if l.startswith('HG:'): continue if l[colonpos - 1:colonpos + 2] != ' : ': raise error.Abort(_('malformed line: %s') % l) linecontent = l[colonpos + 2:] for i, ch in enumerate(l[leftpadpos:colonpos - 1]): if ch == 'y': contents[visiblefctxs[i][0]] += linecontent # chunkstats is hard to calculate if anything changes, therefore # set them to just a simple value (1, 1). if editedtext != editortext: self.chunkstats = [1, 1] return contents def _getline(self, lineinfo): """((rev, linenum)) -> str. convert rev+line number to line content""" rev, linenum = lineinfo if rev & 1: # odd: original line taken from fctxs return self.contentlines[rev // 2][linenum] else: # even: fixup line from targetfctx return self.targetlines[linenum] def _iscontinuous(self, a1, a2, closedinterval=False): """(a1, a2 : int) -> bool check if these lines are continuous. i.e. no other insertions or deletions (from other revisions) among these lines. closedinterval decides whether a2 should be included or not. i.e. is it [a1, a2), or [a1, a2] ? """ if a1 >= a2: return True llog = self.linelog offset1 = llog.getoffset(a1) offset2 = llog.getoffset(a2) + int(closedinterval) linesinbetween = llog.getalllines(offset1, offset2) return len(linesinbetween) == a2 - a1 + int(closedinterval) def _optimizefixups(self, fixups): """[(rev, a1, a2, b1, b2)] -> [(rev, a1, a2, b1, b2)]. merge adjacent fixups to make them less fragmented. """ result = [] pcurrentchunk = [[-1, -1, -1, -1, -1]] def pushchunk(): if pcurrentchunk[0][0] != -1: result.append(tuple(pcurrentchunk[0])) for i, chunk in enumerate(fixups): rev, a1, a2, b1, b2 = chunk lastrev = pcurrentchunk[0][0] lasta2 = pcurrentchunk[0][2] lastb2 = pcurrentchunk[0][4] if (a1 == lasta2 and b1 == lastb2 and rev == lastrev and self._iscontinuous(max(a1 - 1, 0), a1)): # merge into currentchunk pcurrentchunk[0][2] = a2 pcurrentchunk[0][4] = b2 else: pushchunk() pcurrentchunk[0] = list(chunk) pushchunk() return result def _showchanges(self, fm, alines, blines, chunk, fixups): def trim(line): if line.endswith('\n'): line = line[:-1] return line # this is not optimized for perf but _showchanges only gets executed # with an extra command-line flag. a1, a2, b1, b2 = chunk aidxs, bidxs = [0] * (a2 - a1), [0] * (b2 - b1) for idx, fa1, fa2, fb1, fb2 in fixups: for i in pycompat.xrange(fa1, fa2): aidxs[i - a1] = (max(idx, 1) - 1) // 2 for i in pycompat.xrange(fb1, fb2): bidxs[i - b1] = (max(idx, 1) - 1) // 2 fm.startitem() fm.write('hunk', ' %s\n', '@@ -%d,%d +%d,%d @@' % (a1, a2 - a1, b1, b2 - b1), label='diff.hunk') fm.data(path=self.path, linetype='hunk') def writeline(idx, diffchar, line, linetype, linelabel): fm.startitem() node = '' if idx: ctx = self.fctxs[idx] fm.context(fctx=ctx) node = ctx.hex() self.ctxaffected.add(ctx.changectx()) fm.write('node', '%-7.7s ', node, label='absorb.node') fm.write('diffchar ' + linetype, '%s%s\n', diffchar, line, label=linelabel) fm.data(path=self.path, linetype=linetype) for i in pycompat.xrange(a1, a2): writeline(aidxs[i - a1], '-', trim(alines[i]), 'deleted', 'diff.deleted') for i in pycompat.xrange(b1, b2): writeline(bidxs[i - b1], '+', trim(blines[i]), 'inserted', 'diff.inserted') class fixupstate(object): """state needed to run absorb internally, it keeps paths and filefixupstates. a typical use is like filefixupstates: 1. call diffwith, to calculate fixups 2. (optionally), present fixups to the user, or edit fixups 3. call apply, to apply changes to memory 4. call commit, to commit changes to hg database """ def __init__(self, stack, ui=None, opts=None): """([ctx], ui or None) -> None stack: should be linear, and sorted by topo order - oldest first. all commits in stack are considered mutable. """ assert stack self.ui = ui or nullui() self.opts = opts or {} self.stack = stack self.repo = stack[-1].repo().unfiltered() # following fields will be filled later self.paths = [] # [str] self.status = None # ctx.status output self.fctxmap = {} # {path: {ctx: fctx}} self.fixupmap = {} # {path: filefixupstate} self.replacemap = {} # {oldnode: newnode or None} self.finalnode = None # head after all fixups self.ctxaffected = set() # ctx that will be absorbed into def diffwith(self, targetctx, match=None, fm=None): """diff and prepare fixups. update self.fixupmap, self.paths""" # only care about modified files self.status = self.stack[-1].status(targetctx, match) self.paths = [] # but if --edit-lines is used, the user may want to edit files # even if they are not modified editopt = self.opts.get('edit_lines') if not self.status.modified and editopt and match: interestingpaths = match.files() else: interestingpaths = self.status.modified # prepare the filefixupstate seenfctxs = set() # sorting is necessary to eliminate ambiguity for the "double move" # case: "hg cp A B; hg cp A C; hg rm A", then only "B" can affect "A". for path in sorted(interestingpaths): self.ui.debug('calculating fixups for %s\n' % path) targetfctx = targetctx[path] fctxs, ctx2fctx = getfilestack(self.stack, path, seenfctxs) # ignore symbolic links or binary, or unchanged files if any(f.islink() or stringutil.binary(f.data()) for f in [targetfctx] + fctxs if not isinstance(f, emptyfilecontext)): continue if targetfctx.data() == fctxs[-1].data() and not editopt: continue seenfctxs.update(fctxs[1:]) self.fctxmap[path] = ctx2fctx fstate = filefixupstate(fctxs, path, ui=self.ui, opts=self.opts) if fm is not None: fm.startitem() fm.plain('showing changes for ') fm.write('path', '%s\n', path, label='absorb.path') fm.data(linetype='path') fstate.diffwith(targetfctx, fm) self.fixupmap[path] = fstate self.paths.append(path) self.ctxaffected.update(fstate.ctxaffected) def apply(self): """apply fixups to individual filefixupstates""" for path, state in self.fixupmap.iteritems(): if self.ui.debugflag: self.ui.write(_('applying fixups to %s\n') % path) state.apply() @property def chunkstats(self): """-> {path: chunkstats}. collect chunkstats from filefixupstates""" return dict((path, state.chunkstats) for path, state in self.fixupmap.iteritems()) def commit(self): """commit changes. update self.finalnode, self.replacemap""" with self.repo.wlock(), self.repo.lock(): with self.repo.transaction('absorb') as tr: self._commitstack() self._movebookmarks(tr) if self.repo['.'].node() in self.replacemap: self._moveworkingdirectoryparent() if self._useobsolete: self._obsoleteoldcommits() if not self._useobsolete: # strip must be outside transactions self._stripoldcommits() return self.finalnode def printchunkstats(self): """print things like '1 of 2 chunk(s) applied'""" ui = self.ui chunkstats = self.chunkstats if ui.verbose: # chunkstats for each file for path, stat in chunkstats.iteritems(): if stat[0]: ui.write(_('%s: %d of %d chunk(s) applied\n') % (path, stat[0], stat[1])) elif not ui.quiet: # a summary for all files stats = chunkstats.values() applied, total = (sum(s[i] for s in stats) for i in (0, 1)) ui.write(_('%d of %d chunk(s) applied\n') % (applied, total)) def _commitstack(self): """make new commits. update self.finalnode, self.replacemap. it is splitted from "commit" to avoid too much indentation. """ # last node (20-char) committed by us lastcommitted = None # p1 which overrides the parent of the next commit, "None" means use # the original parent unchanged nextp1 = None for ctx in self.stack: memworkingcopy = self._getnewfilecontents(ctx) if not memworkingcopy and not lastcommitted: # nothing changed, nothing commited nextp1 = ctx continue msg = '' if self._willbecomenoop(memworkingcopy, ctx, nextp1): # changeset is no longer necessary self.replacemap[ctx.node()] = None msg = _('became empty and was dropped') else: # changeset needs re-commit nodestr = self._commitsingle(memworkingcopy, ctx, p1=nextp1) lastcommitted = self.repo[nodestr] nextp1 = lastcommitted self.replacemap[ctx.node()] = lastcommitted.node() if memworkingcopy: msg = _('%d file(s) changed, became %s') % ( len(memworkingcopy), self._ctx2str(lastcommitted)) else: msg = _('became %s') % self._ctx2str(lastcommitted) if self.ui.verbose and msg: self.ui.write(_('%s: %s\n') % (self._ctx2str(ctx), msg)) self.finalnode = lastcommitted and lastcommitted.node() def _ctx2str(self, ctx): if self.ui.debugflag: return '%d:%s' % (ctx.rev(), ctx.hex()) else: return '%d:%s' % (ctx.rev(), node.short(ctx.node())) def _getnewfilecontents(self, ctx): """(ctx) -> {path: str} fetch file contents from filefixupstates. return the working copy overrides - files different from ctx. """ result = {} for path in self.paths: ctx2fctx = self.fctxmap[path] # {ctx: fctx} if ctx not in ctx2fctx: continue fctx = ctx2fctx[ctx] content = fctx.data() newcontent = self.fixupmap[path].getfinalcontent(fctx) if content != newcontent: result[fctx.path()] = newcontent return result def _movebookmarks(self, tr): repo = self.repo needupdate = [(name, self.replacemap[hsh]) for name, hsh in repo._bookmarks.iteritems() if hsh in self.replacemap] changes = [] for name, hsh in needupdate: if hsh: changes.append((name, hsh)) if self.ui.verbose: self.ui.write(_('moving bookmark %s to %s\n') % (name, node.hex(hsh))) else: changes.append((name, None)) if self.ui.verbose: self.ui.write(_('deleting bookmark %s\n') % name) repo._bookmarks.applychanges(repo, tr, changes) def _moveworkingdirectoryparent(self): if not self.finalnode: # Find the latest not-{obsoleted,stripped} parent. revs = self.repo.revs('max(::. - %ln)', self.replacemap.keys()) ctx = self.repo[revs.first()] self.finalnode = ctx.node() else: ctx = self.repo[self.finalnode] dirstate = self.repo.dirstate # dirstate.rebuild invalidates fsmonitorstate, causing "hg status" to # be slow. in absorb's case, no need to invalidate fsmonitorstate. noop = lambda: 0 restore = noop if util.safehasattr(dirstate, '_fsmonitorstate'): bak = dirstate._fsmonitorstate.invalidate def restore(): dirstate._fsmonitorstate.invalidate = bak dirstate._fsmonitorstate.invalidate = noop try: with dirstate.parentchange(): dirstate.rebuild(ctx.node(), ctx.manifest(), self.paths) finally: restore() @staticmethod def _willbecomenoop(memworkingcopy, ctx, pctx=None): """({path: content}, ctx, ctx) -> bool. test if a commit will be noop if it will become an empty commit (does not change anything, after the memworkingcopy overrides), return True. otherwise return False. """ if not pctx: parents = ctx.parents() if len(parents) != 1: return False pctx = parents[0] # ctx changes more files (not a subset of memworkingcopy) if not set(ctx.files()).issubset(set(memworkingcopy)): return False for path, content in memworkingcopy.iteritems(): if path not in pctx or path not in ctx: return False fctx = ctx[path] pfctx = pctx[path] if pfctx.flags() != fctx.flags(): return False if pfctx.data() != content: return False return True def _commitsingle(self, memworkingcopy, ctx, p1=None): """(ctx, {path: content}, node) -> node. make a single commit the commit is a clone from ctx, with a (optionally) different p1, and different file contents replaced by memworkingcopy. """ parents = p1 and (p1, node.nullid) extra = ctx.extra() if self._useobsolete and self.ui.configbool('absorb', 'add-noise'): extra['absorb_source'] = ctx.hex() mctx = overlaycontext(memworkingcopy, ctx, parents, extra=extra) # preserve phase with mctx.repo().ui.configoverride({ ('phases', 'new-commit'): ctx.phase()}): return mctx.commit() @util.propertycache def _useobsolete(self): """() -> bool""" return obsolete.isenabled(self.repo, obsolete.createmarkersopt) def _obsoleteoldcommits(self): relations = [(self.repo[k], v and (self.repo[v],) or ()) for k, v in self.replacemap.iteritems()] if relations: obsolete.createmarkers(self.repo, relations) def _stripoldcommits(self): nodelist = self.replacemap.keys() # make sure we don't strip innocent children revs = self.repo.revs('%ln - (::(heads(%ln::)-%ln))', nodelist, nodelist, nodelist) tonode = self.repo.changelog.node nodelist = [tonode(r) for r in revs] if nodelist: repair.strip(self.repo.ui, self.repo, nodelist) def _parsechunk(hunk): """(crecord.uihunk or patch.recordhunk) -> (path, (a1, a2, [bline]))""" if type(hunk) not in (crecord.uihunk, patch.recordhunk): return None, None path = hunk.header.filename() a1 = hunk.fromline + len(hunk.before) - 1 # remove before and after context hunk.before = hunk.after = [] buf = util.stringio() hunk.write(buf) patchlines = mdiff.splitnewlines(buf.getvalue()) # hunk.prettystr() will update hunk.removed a2 = a1 + hunk.removed blines = [l[1:] for l in patchlines[1:] if l[0] != '-'] return path, (a1, a2, blines) def overlaydiffcontext(ctx, chunks): """(ctx, [crecord.uihunk]) -> memctx return a memctx with some [1] patches (chunks) applied to ctx. [1]: modifications are handled. renames, mode changes, etc. are ignored. """ # sadly the applying-patch logic is hardly reusable, and messy: # 1. the core logic "_applydiff" is too heavy - it writes .rej files, it # needs a file stream of a patch and will re-parse it, while we have # structured hunk objects at hand. # 2. a lot of different implementations about "chunk" (patch.hunk, # patch.recordhunk, crecord.uihunk) # as we only care about applying changes to modified files, no mode # change, no binary diff, and no renames, it's probably okay to # re-invent the logic using much simpler code here. memworkingcopy = {} # {path: content} patchmap = defaultdict(lambda: []) # {path: [(a1, a2, [bline])]} for path, info in map(_parsechunk, chunks): if not path or not info: continue patchmap[path].append(info) for path, patches in patchmap.iteritems(): if path not in ctx or not patches: continue patches.sort(reverse=True) lines = mdiff.splitnewlines(ctx[path].data()) for a1, a2, blines in patches: lines[a1:a2] = blines memworkingcopy[path] = ''.join(lines) return overlaycontext(memworkingcopy, ctx) def absorb(ui, repo, stack=None, targetctx=None, pats=None, opts=None): """pick fixup chunks from targetctx, apply them to stack. if targetctx is None, the working copy context will be used. if stack is None, the current draft stack will be used. return fixupstate. """ if stack is None: limit = ui.configint('absorb', 'max-stack-size') stack = getdraftstack(repo['.'], limit) if limit and len(stack) >= limit: ui.warn(_('absorb: only the recent %d changesets will ' 'be analysed\n') % limit) if not stack: raise error.Abort(_('no mutable changeset to change')) if targetctx is None: # default to working copy targetctx = repo[None] if pats is None: pats = () if opts is None: opts = {} state = fixupstate(stack, ui=ui, opts=opts) matcher = scmutil.match(targetctx, pats, opts) if opts.get('interactive'): diff = patch.diff(repo, stack[-1].node(), targetctx.node(), matcher) origchunks = patch.parsepatch(diff) chunks = cmdutil.recordfilter(ui, origchunks)[0] targetctx = overlaydiffcontext(stack[-1], chunks) fm = None if opts.get('print_changes'): fm = ui.formatter('absorb', opts) state.diffwith(targetctx, matcher, fm) if fm is not None: fm.startitem() fm.write("count", "\n%d changesets affected\n", len(state.ctxaffected)) fm.data(linetype='summary') for ctx in reversed(stack): if ctx not in state.ctxaffected: continue fm.startitem() fm.context(ctx=ctx) fm.data(linetype='changeset') fm.write('node', '%-7.7s ', ctx.hex(), label='absorb.node') descfirstline = ctx.description().splitlines()[0] fm.write('descfirstline', '%s\n', descfirstline, label='absorb.description') fm.end() if not opts.get('dry_run'): state.apply() if state.commit(): state.printchunkstats() elif not ui.quiet: ui.write(_('nothing applied\n')) return state @command('^absorb', [('p', 'print-changes', None, _('print which changesets are modified by which changes')), ('i', 'interactive', None, _('interactively select which chunks to apply (EXPERIMENTAL)')), ('e', 'edit-lines', None, _('edit what lines belong to which changesets before commit ' '(EXPERIMENTAL)')), ] + commands.dryrunopts + commands.templateopts + commands.walkopts, _('hg absorb [OPTION] [FILE]...')) def absorbcmd(ui, repo, *pats, **opts): """incorporate corrections into the stack of draft changesets absorb analyzes each change in your working directory and attempts to amend the changed lines into the changesets in your stack that first introduced those lines. If absorb cannot find an unambiguous changeset to amend for a change, that change will be left in the working directory, untouched. They can be observed by :hg:`status` or :hg:`diff` afterwards. In other words, absorb does not write to the working directory. Changesets outside the revset `::. and not public() and not merge()` will not be changed. Changesets that become empty after applying the changes will be deleted. If in doubt, run :hg:`absorb -pn` to preview what changesets will be amended by what changed lines, without actually changing anything. Returns 0 on success, 1 if all chunks were ignored and nothing amended. """ opts = pycompat.byteskwargs(opts) state = absorb(ui, repo, pats=pats, opts=opts) if sum(s[0] for s in state.chunkstats.values()) == 0: return 1