bdiff: early pruning of common prefix before doing expensive computations It seems quite common that files don't change completely. New lines are often pretty much appended, and modifications will often only change a small section of the file which on average will be in the middle. There can thus be a big win by pruning a common prefix before starting the more expensive search for longest common substrings. Worst case, it will scan through a long sequence of similar bytes without encountering a newline. Splitlines will then have to do the same again ... twice for each side. If similar lines are found, splitlines will save the double iteration and hashing of the lines ... plus there will be less lines to find common substrings in. This change might in some cases make the algorith pick shorter or less optimal common substrings. We can't have the cake and eat it. This make hg --time bundle --base null -r 4.0 go from 14.5 to 15 s - a 3% increase. On mozilla-unified: perfbdiff -m 3041e4d59df2 ! wall 0.053088 comb 0.060000 user 0.060000 sys 0.000000 (best of 100) to ! wall 0.024618 comb 0.020000 user 0.020000 sys 0.000000 (best of 116) perfbdiff 0e9928989e9c --alldata --count 10 ! wall 0.702075 comb 0.700000 user 0.700000 sys 0.000000 (best of 15) to ! wall 0.579235 comb 0.580000 user 0.580000 sys 0.000000 (best of 18)

formatter: add overview of API and example as doctest

ui: factor out ui.load() to create a ui without loading configs (API) This allows us to write doctests depending on a ui object, but not on global configs. ui.load() is a class method so we can do wsgiui.load(). All ui() calls but for doctests are replaced with ui.load(). Some of them could be changed to not load configs later.

hgweb: add missing slash to file log url in rss style

check-code: add a rule to forbid "cp -r" See the commit message of the previous patch for the reason. In short, according to the current POSIX standard, "-r" is "removed", and "-R" is the current standard way to do "copy file hierarchies".

tests: replace "cp -r" with "cp -R" The POSIX documentation about "cp" [1] says: .... RATIONALE .... Earlier versions of this standard included support for the -r option to copy file hierarchies. The -r option is historical practice on BSD and BSD-derived systems. This option is no longer specified by POSIX.1-2008 but may be present in some implementations. The -R option was added as a close synonym to the -r option, selected for consistency with all other options in this volume of POSIX.1-2008 that do recursive directory descent. The difference between -R and the removed -r option is in the treatment by cp of file types other than regular and directory. It was implementation-defined how the - option treated special files to allow both historical implementations and those that chose to support -r with the same abilities as -R defined by this volume of POSIX.1-2008. The original -r flag, for historic reasons, did not handle special files any differently from regular files, but always read the file and copied its contents. This had obvious problems in the presence of special file types; for example, character devices, FIFOs, and sockets. .... .... Issue 6 The -r option is marked obsolescent. .... Issue 7 .... The obsolescent -r option is removed. .... (No "Issue 8" yet) Therefore it's clear that "cp -R" is strictly better than "cp -r". The issue was discovered when running tests on OS X after 0d87b1caed92. [1]: pubs.opengroup.org/onlinepubs/9699919799/utilities/cp.html

posix: give the cached symlink a real target The NamedTemporaryFile file is cleared up so checklink ends up as a dangling symlink, causing cp -r in tests to complain on both Solaris and OS X. Use a permanent file instead when there is a .hg/cache directory.

shelve: move patch extension to a string constant We are using 'name + ".patch"' pattern throughout the shelve code to identify the existence of a shelve with a particular name. In two cases however we use 'name + ".hg"' instead. This commit makes 'patch' be used in all places and "emphasizes" it by moving 'patch' to live in a constant. Also, this allows to extract file name without extension like this: f[:-(1 + len(patchextension))] instead of: f[:-6] which is good IMO. This is a first patch from this initial "obsshelve" series. This series does not include tests, although locally I have all of test-shelve.t ported to test obs-shelve as well. I will send tests later as a separate series.

merge with stable

Added signature for changeset b3b1ae98f6a0