mergestate.add: store absentfilectxes as nullhex This is the most natural way to represent these files. We also need to make sure we don't try to store these files in the merge store.

mergestate._resolve: handle change/delete conflicts We will represent a deleted file as 'nullhex' in the in-memory and on-disk merge states. We need to be able to create absentfilectxes in that case, and delete the file from disk rather than try to write it out.

filemerge: don't try to copy files known to be absent We set 'back' to None in this case, so we need to handle that as well.

hgweb: use absolute_import

hgweb: import wsgicgi at top level There should be no practical reason to delay the import of wsgicgi.

hgweb: import BaseHTTPServer as module at top level This will avoid future warning spotted by the import checker.

hgweb: do not import hgweb_mod.hgweb and .makebreadcrumb as symbol It will be enforced by the import checker.

filemerge: don't try using external tools on change/delete conflicts This is mostly for completeness' sake -- the current code shouldn't get to this point.

filemerge: don't attempt to premerge change/delete conflicts This is mostly for completeness' sake -- at the moment we don't support any tools for change/delete conflicts that would do a premerge.

filemerge._mergecheck: add check for change/delete conflicts Merge tools that perform an actual 3-way merge can't handle change/delete conflicts. This adds a check for that.

filemerge._picktool: only pick from nomerge tools for change/delete conflicts For --tool or HGMERGE, we could have either: (a) proceeded with the particular tool, then failed the merge. (b) chosen to prompt regardless. We're explicitly choosing (b) here, because it's effectively what we've been doing so far and helps maintain an easier-to-use interface. However, in future patches we're going to change the default selection from 'pick changed version' to 'leave unresolved'. That fixes most of the brokenness involved with choice (b).

filemerge: add support for change/delete conflicts to the ':prompt' tool We haven't added the 'leave unresolved' option yet -- that will come in a future patch.

filemerge: add support for change/delete conflicts to the ':other' merge tool This, along with the previous patch to the :local merge tool, covers the full matrix of change/delete conflicts.

filemerge: add support for change/delete conflicts to the ':local' merge tool This covers two of the four cases of change/delete conflicts -- in an upcoming patch we'll make :other cover the other two.

merge.mergestate: compute dirstate action In upcoming patches we're going to queue these actions up to be applied to the dirstate at the end.

filemerge: return whether the file was deleted This is required for change/delete conflict resolution -- see previous patches for more details.

filemerge: return whether the file is deleted from all other merge tools This is required for change/delete conflicts -- see the previous patch for more information.

filemerge: return whether the file is deleted for nomerge internal tools We're going to support the filemerge code resolving change/delete conflicts in upcoming patches. Some of these resolutions require that the dirstate be modified. Modifying the dirstate directly from in here would be (a) a pretty bad layering violation and (b) wrong because all dirstate removals should happen before adds. So in this and upcoming patches we're instead going to pass whether the file is deleted up to merge.mergestate, then in there figure out what dirstate action needs to be taken.

mergestate: allow storing and retrieving change/delete conflicts We introduce a new record type, 'C', to indicate change/delete conflicts. This is a separate record type because older versions of Mercurial will not be able to handle these conflicts. We aren't actually storing any change/delete conflicts yet -- that will come in future patches.

strip: changing bookmark argument to be a list Currently strip works with a single bookmark, the changes in this patch modifies the strip extension to accept a list of bookmarks

strip: strip a list of bookmarks Currently strip works with a single bookmark, the changes in this patch modifies the strip module to work with a list of bookmarks Building on this we can take a list of bookmarks as input and remove all of them in a single go

revset: speed up '_matchfiles' File matching is done by applying the matcher to all elements in the 'file' field of all changesets in the repository. This requires to read/parse all changesets in the repository and do a lot of matching. However about 1/3 of the time of the function is used to create 'changectx' object and retrieve their 'file' field. This is far too much overhead so we are skipping the changectx layer and directly access the data from the changelog. This provide use significant speed up: repository: mozilla central 252524 revisions command: hg perfrevset '_matchfiles("p:browser")' Before: 15.899687s After: 10.011705s Slowdown is even more significant if you have a lot of namespace that slowdown lookup. The time is now spent with this approximate repartition: Matcher: 20% regexp matching: 10% changelog.read: 80% reading revision: 60% checking hash: 15% decompression: 15% reading chunk: 30% changelog parsing: 20% decoding to local: 10% The next easy win is probably to have more of the changelog stack implemented using the CPython api.

mergestate: handle additional record types specially This works around a bug in older Mercurial versions' handling of the v2 merge state. We also add a bunch of tests that make sure that (1) we correctly abort when the merge state has an unsupported record type (2) aborting the merge, rebase or histedit continues to work and clears out the merge state.

test-resolve.t: remove completely unnecessary line I have no idea what I was thinking when I wrote this.

resolve: fix incorrect merge The merge from stable into default was semantically incomplete -- a couple of changes in preceding code had to be rewritten here. This code only triggers for change/delete conflicts, so we can't test it yet. We will soon be able to do it, though.

fileset: add missing() predicate (issue4925) Help of status cmd defines status file of 'missing', what is called in fileset 'deleted'. To stay consistent this patch introduces missing() predicate which in fact is alias to 'deleted'.

webutil: make _siblings into an object with __iter__ and __len__ _siblings is a helper that is used for displaying changeset parents and children in hgweb. Before, when it was a simple generator, it couldn't tell its length without being consumed, and that required a special case when preparing data for changeset template (see 9e1f4c65f5f5). Let's make it into a class (similar to templatekw._hybrid) that allows len(...) without side-effects.

mergestate: move binary format documentation into _readrecordsv2 This is too low-level to be the top-level documentation for mergestate. We're restricting the top-level documentation to only be about what consumers of the mergestate and anyone extending it need to care about.

unshelve: add support for custom merge tools For parity with merge --tool, rebase --tool etc. rebase.rebase overwrites the tool in repo.ui, so we need to explicitly pass it down there too.

unshelve: shed spurious space

unshelve: add -k as short form of --keep For parity with strip -k, rebase -k, etc.

import-checker: allow symbol imports from hgweb.common and .request This seems the convention of hgweb.

perf: un-bitrot perfstatus

util: drop statmtimesec We've globablly forced stat to return integer times which agrees with our extension code, so this is no longer needed. This speeds up status on mozilla-central substantially: $ hg perfstatus ! wall 0.190179 comb 0.180000 user 0.120000 sys 0.060000 (best of 53) $ hg perfstatus ! wall 0.275729 comb 0.270000 user 0.210000 sys 0.060000 (best of 36)

util: disable floating point stat times (issue4836) Alternate fix for this issue which avoids putting extra function calls and exception handling in the fast path. For almost all purposes, integer timestamps are preferable to Mercurial. It stores integer timestamps in the dirstate and would thus like to avoid doing any float/int comparisons or conversions. We will continue to have to deal with 1-second granularity on filesystems for quite some time, so this won't significantly hinder our capabilities. This has some impact on our file cache validation code in that it lowers timestamp resolution. But as we still have to deal with low-resolution filesystems, we're not relying on this anyway. An alternate approach is to use stat[ST_MTIME], which is guaranteed to be an integer. But since this support isn't already in our extension, we can't depend on it being available without adding a hard Python->C API dependency that's painful for people like yours truly who have bisect regularly and people without compilers.

rebase: refactoring to avoid repetition of expression This patch removes the repetition of "(revignored, revprecursor, revpruned)" and replaces its occurences with the more legible "revskipped".

rebase: remove an unused todo Since we handled skipping obsolete revs when it is relevant, this todo is no longer useful. We replace the comment with two useful comments.

rebase: don't rebase obsolete commits with no successor This patch avoids unnecessary conflicts to resolve during rebase for the users of changeset evolution. This patch modifies rebase to skip obsolete commits with no successor. It introduces a new rebase state 'revpruned' for these revisions that are being skipped and a new message to inform the user of what is happening. This feature is gated behind the config flag experimental.rebaseskipobsolete When an obsolete commit is skipped, the output is: note: not rebasing 7:360bbaa7d3ce "O", it has no successor

rebase: fix a typo in test-rebase-obsolete We had left a lonely single quote where it shouldn't be!

merge with stable

hgweb: unify import style of error classes It will be enforced by the import checker.

hgweb: do not import templatefilters.revescape and websub as symbol It will be enforced by the import checker.

hgweb: alias ui module as uimod It will be enforced by the import checker.

mergestate.commit: factor out making the list of records Will aid in testing.

mergestate: move _read() call to read constructor With this patch, mergestate.clean() will no longer abort when it encounters an unsupported merge type. However we hold off on testing it until backwards compatibility is in place.

debugmergestate: explain why we create mergestate objects directly We would normally use the read() constructor, but in this case it's fine because - we implement our own reading layer, so the extra parsing done by read() is unnecessary - read() can raise an exception for unsupported merge state records, but here we'd like to handle that separately - debugmergestate needs to be privy to mergestate internals anyway

debugdirstate: convert keyword parameters to **opts Removes the named arguments and replaces them by accessing opts. This will be used in the next patch in the series because we'll be adding more flags to debugdirstate

convert: changed test's progress output format to ignore estimate On my machine, whenever I run all test with a high -j value, test-convert-git.t would consistently fail by displaying an estimate. This patch removes that value from the output.