update: replace workingctx.dirty and raising Abort by cmdutil.bailifchanged This patch makes wrapping "commands.update()" by largefiles extension useless, because "cmdutil.bailifchanged()" can detect changes of largefiles in the working directory. This patch also changes test-update-branches.t, because "cmdutil.bailifchanged()" shows more detailed information about dirty-ness of the working directory than "workingctx.dirty()".

cmdutil: allow bailifchanged to ignore merging in progress In "commands.update()", "cmdutil.bailifchanged()" isn't used for "abort if the working directory is dirty", because it forcibly examines about merging in progress. "workingctx.dirty()" used in "commands.update()" can't detect changes of largefiles in the working directory without "repo.lfstatus = True" wrapping. This is only reason of "commands.update()" wrapping by largefiles extension. On the other hand, "cmdutil.bailifchanged()" already wrapped by largefiles extension can detect changes of largefiles. This patch is a preparations for replacing "workingctx.dirty()" and raising Abort in "commands.update()" by "cmdutil.bailifchanged()". It can remove redundant "commands.update()" wrapping.

subrepo: add bailifchanged to centralize raising Abort if subrepo is dirty This patch also centralizes composing dirty reason message like "uncommitted changes in subrepository 'xxxx'".

subrepo: add dirtyreason to centralize composing dirty reason message This patch newly adds "dirtyreason()" to centralize composing dirty reason message like "uncommitted changes in subrepository 'xxxx'". There are 3 similar messages below, and this patch is a part of preparations for unifying them into (1), too. 1. uncommitted changes in subrepository 'XXXX' 2. uncommitted changes in subrepository XXXX 3. uncommitted changes in subrepo XXXX This patch chooses adding new method "dirtyreason()" instead of making "dirty()" return "reason string", because: - some of existing "dirty()" implementation is too complicated to do so simply, and - ill-mannered 3rd party subrepo classes, of which "dirty()" doesn't return "reason string", cause meaningless message (even though it is rare case)

record_curses: add test for newly added files We have a UI bug where toggling a newly added file twice in the curses interface didn't mark it as selected. This test checks that the underlying logic is working as expected, the next patch of the series fixes the UI bug.

test-manifest.py: don't test .text() with present node suffix When m.text() is called after setting a nodeid with a suffix (such as '+'), manifestdict uses the suffix-less nodeid for the text, while treemanifest includes the suffix. It would perhaps make most sense to raise an exception so the bug is found, but since the two implementations behave differently, let's just not test the behavior for now.

treemanifest: drop 22nd byte for consistency with manifestdict When assigning a 22-byte hash to a nodeid in a manifest, manifestdict drops the 22nd byte, while treemanifest keeps it. Let's make treemanifest drop the 22nd byte as well.

test-manifest.py: rewrite tests in terms of manifestdict By rewriting test-manifest.py in terms of manifestdict instead of _lazymanifest, the tests can be run on treemanifests too. There are still a few tests that fail on treemanifests. They will be addressed in the next few patches.

test-manifest.py: separate out test for double-free after copy() The test that we don't double-free anything after creating a copy is currently mixed with the __setitem__ test. Let's separate them.

revert: evaluate subrepos to revert against the working directory Reverting to a revision where the subrepo didn't exist will now abort, and matching subrepos against the working directory is consistent with how filesets are evaluated since 5b85a5bc5bbb.

revert: handle subrepos missing in the given --rev The list of subrepos to revert is currently based on the given --rev, so there is currently no way for this to fail. Using the --rev context is wrong though, because if the subrepo doesn't exist in --rev, it is skipped, so it won't be changed. This change makes it so that the revert aborts, which is what happens if a plain file is reverted to -1. Finding matches based on --rev is also inconsistent with evaluating files against the working directory (5b85a5bc5bbb). This change is made now, so as to not cause breakage when the context is switched in an upcoming patch.

osutil: mark end of string with null char, not 0 Noticed this while working on other stuff in the area.

osutil: use getdirentriesattr on OS X if possible This is a significant win for large repositories on OS X, especially with a cold cache. Unfortunately we need to keep the lstat-based implementation around for two reasons: - Not all filesystems support this call. - There's an edge case in which it's best to fall back to avoid a retry loop. More about this in the comments. The below tests are all performed on a Mac with an SSD running OS X 10.9, on a repository with over 200k files. The results are best of 5 with simulated best-effort conditions. The gains with a hot cache are pretty impressive: 'hg status' goes from 5.18 seconds to 3.79 seconds. However, a repository that large will probably already be using something like hgwatchman [1], which helps much more (for this repo, 'hg status' with hgwatchman is approximately 1 second). Where this really helps is when the cache is cold [2]: hg status goes from 31.0 seconds to 9.66. See http://lists.apple.com/archives/filesystem-dev/2014/Dec/msg00002.html for some more discussion about this function. This is based on a patch by Sean Farley <sean@farley.io>. [1] https://bitbucket.org/facebook/hgwatchman [2] There appears to be no easy way to clear the file cache (aka "vnodes") on OS X short of rebooting. purge(8) purportedly does that but in my testing had little effect. The workaround I came up with was to assume that vnode eviction was LRU, make sure the kern.maxvnodes sysctl is smaller than the size of the repository, then make sure we'd always miss the cache by running 'hg status' in another clone of the repository before running it in the test repository.

osutil._listdir: rename to _listdir_stat In upcoming patches we'll add another implementation of listdir on OS X. That implementation will have to fall back to this one under some circumstances, though. We'll make _listdir be able to detect those circumstances and use the right function as appropriate.

revset: optimize "x & fullreposet" case If self is a smartset and other is a fullreposet, nothing should be necessary. A small win for trivial query in mozilla-central repo: revset #0: (0:100000) 0) wall 0.017211 comb 0.020000 user 0.020000 sys 0.000000 (best of 163) 1) wall 0.001324 comb 0.000000 user 0.000000 sys 0.000000 (best of 2160)

debugrevspec: show nesting structure of smartsets if verbose This shows how smartsets are constructed from the query. It will be somewhat useful to track problems such as stack overflow.

revset: add __repr__ to all smartset classes This is sometimes useful for debugging.

status: add relative directory help text (issue3835) Previously, it was difficult to find out how to display the status of files relative to your current working directory. This patch adds that knowledge to the help text.

diff: rename --relative option to --root The diff output format is unable to express files outside the directory so it makes sense to name this option --root instead of --relative.

revlog: make converting from inline to non-line work after a strip The checkinlinesize function, which converts inline revlogs to non-inline, uses the current transaction's "data" field to determine how to update the transaction after the conversion. This change works around the missing data field, which is not in the transaction after a strip.

check-code: in C code, prevent space before closing parenthesis

match: remove unused assignment of ctx ctx is consumed in __init__ to build match patterns and never used after that.

revert: comment that filesets are always evaluated against workingctx

revert: take fast path also when not reverting to '.' This speeds up 'hg revert -r .^ --all --dry-run' on the Mozilla repo from 4.081s to 0.826s. Note that 'hg revert -r .^ .' does not get any faster, since '.' does not make match.always() True. I can't think of a reason it would break anything, and if it does, it's clearly not covered by tests.

revert: define 'wctx' a little earlier and use it more

match: add isexact() method to hide internals Comparing a function reference seems bad.

matcher: make e.g. 'relpath:.' lead to fast paths Several commands take the fast path when match.always() is true. However, when the user passes "." on the command line, that results in a matcher for which match.always() == False. Let's make it so such matchers return True, and have an empty list of .files(). This makes e.g. "hg log ." as fast as "hg log" and "hg revert ." as fast as "hg revert --all" (when run from repo root).

revset: add the 'subrepo' symbol This returns the csets where matching subrepos have changed with respect to the containing repo's first parent. The second parent shouldn't matter, because it is either syncing up to the first parent (i.e. it hasn't changed from the current branch's POV), or the merge changed it with respect to the first parent (which already adds it to the set). There's already a 'subrepo' fileset, but it is prefixed with 'set:', so there should be no ambiguity (in code anyway). The only test I see for it is to revert subrepos named by a glob pattern (in test-subrepo.t, line 58). Since it doesn't return a tracked file, neither 'log "set:subrepo()"' nor 'files "set:subrepo()"' print anything. Therefore, it seems useful to have a revset that will return something for log (and can be added to a revsetalias to be chained with 'file' revsets.) It might be nice to be able to filter for added, modified and removed separately, but add/remove should be rare. It might also be nice to be able to do a 'contains' check, in addition to this mutated check. Maybe it is possible to get those with the existing 'adds', 'contains', 'modifies' and 'removes' by teaching them to chase explicit paths into subrepos. I'm not sure if this should be added to the 'modifies adds removes' line in revset.optimize() (since it is doing an AMR check on .hgsubstate), or if it is OK to put into 'safesymbols' (things like 'file' are on the list, and that takes a regex, among other patterns).