largefiles: for update -C, only update largefiles when necessary Before, a --clean update with largefiles would use the "optimization" that it didn't read hashes from standin files before and after the update. Instead of trusting the content of the standin files, it would rehash all the actual largefiles that lfdirstate reported clean and update the standins that didn't have the expected content. It could thus in some "impossible" situations automatically recover from some "largefile got out sync with its standin" issues (even there apparently still were weird corner cases where it could fail). This extra checking is similar to what core --clean intentionally do not do, and it made update --clean unbearable slow. Usually in core Mercurial, --clean will rely on the dirstate to find the files it should update. (It is thus intentionally possible (when trying to trick the system or if there should be bugs) to end up in situations where --clean not will restore the working directory content correctly.) Checking every file when we "know" it is ok is however not an option - that would be too slow. Instead, trust the content of the standin files. Use the same logic for --clean as for linear updates and trust the dirstate and that our "logic" will keep them in sync. It is much cheaper to just rehash the largefiles reported dirty by a status walk and read all standins than to hash largefiles. Most of the changes are just a change of indentation now when the different kinds of updates no longer are handled that differently. Standins for added files are however only written when doing a normal update, while deleted and removed files only will be updated for --clean updates.

subrepo: calculate _relpath for hgsubrepo based on self instead of parent Prior to 105758d1b37b, the subrelpath() (now _relpath) for hgsubrepo was calculated by removing the root path of the outermost repo from the root path of the subrepo. Since the root paths use platform specific separators, and the relative path is printed by various commands, the output of these commands require a glob (and check-code.py enforces this). In an effort to be generic to all subrepos, 105758d1b37b started calculating this path based on the parent repo, and then joining the subrepo path in .hgsub. One of the tests in test-subrepo.t creates a subrepo inside a directory, so the path being joined contained '/' instead of '\'. This made the test fail with a '~' status, because the glob is unnecessary[1]. Removing them made the test work, but then check-code complains. We can't just drop the check-code rule, because sub-subrepos are still joined with '\'. Presumably the other subrepo types have this issue as well, but there likely isn't a test with git or svn repos inside a subdirectory. This simply restores the exact _relpath value (and output) for hgsubrepos prior to 105758d1b37b. [1] http://www.selenic.com/pipermail/mercurial-devel/2015-April/068720.html

subrepo: backout 93b0e0db7929 to restore reporelpath() The path for hgsubrepo needs to be calculated slightly differently from other subrepo types, but can reuse this. See the next patch for details.

rollback: clear resolve state (issue4593)

diff: pass the diff matcher to the copy logic This passes the existing diff matcher instance down to the copy logic so copy tracing can be more efficient when possible and only trace copies for matching files. This only actually affects forwardcopies (i.e. Given A<-B<-C<-D, it works for 'hg diff -r B -r D foo.txt', but not for 'hg diff -r D -r B foo.txt') since backward copies require walking all histories, and not just the individual file's. This reduces 'hg diff -r A -r B foo.txt' time from 15s to 1s when A and B have 80,000 files different.

copies: add matcher parameter to copy logic This allows passing a matcher down the pathcopies() stack to _forwardcopies(). This will let us add logic in a later patch to avoid tracing copies when not necessary (like when doing hg diff -r 1 -r 2 foo.txt).