dispatch: make hg --profile wrap reposetup Move profiling.maybeprofile() from _runcommand to _dispatch() so that profiler output will include reposetup.

dispatch: change indentation level in _dispatch() Add an if True: placeholder for a profiling context manager that will be added in the next commit, for the purpose of reducing size of the diff due to trivial indentation changes. This change should be a no-op.

log: drop outdated optimization to walk revisions in reverse order Since revset is computed lazily, there would be no (or little) benefit to reverse 'revs' temporarily.

graphlog: preserve topo sort even if additional filter options specified Use ordered=revset.followorder instead. This change is logically the same as fa5e4f58dfbc.

transaction: open a file with checkambig=True to avoid file stat ambiguity Before this patch, if steps below occurs at "the same time in sec", all of mtime, ctime and size are same between (1) and (3). 1. append data to revlog-style file (and close transaction) 2. discard appended data by truncation of rollback 3. append same size but different data to revlog-style file again Therefore, cache validation doesn't work after (3) as expected. To avoid file stat ambiguity around truncation, this patch opens a file with checkambig=True. This is a part of ExactCacheValidationPlan. https://www.mercurial-scm.org/wiki/ExactCacheValidationPlan

repair: open a file with checkambig=True to avoid file stat ambiguity Before this patch, if steps below occurs at "the same time in sec", all of mtime, ctime and size are same between (1) and (3). 1. append data to revlog-style file (and close transaction) 2. discard appended data by truncation of strip 3. append same size but different data to revlog-style file again Therefore, cache validation doesn't work after (3) as expected. To avoid such file stat ambiguity around truncation, this patch opens a file with checkambig=True. This patch also introduces "with" statement style, to ensure immediate invocation of close() after truncation, because closing file is the only trigger to check (and get rid of) file stat ambiguity. This is a part of ExactCacheValidationPlan. https://www.mercurial-scm.org/wiki/ExactCacheValidationPlan

changelog: specify checkambig=True to revlog.__init__, to avoid ambiguity If steps below occurs at "the same time in sec", all of mtime, ctime and size are same between (1) and (3). 1. append data to 00changelog.i (and close transaction) 2. discard appended data by truncation (strip or rollback) 3. append same size but different data to 00changelog.i again Therefore, cache validation doesn't work after (3) as expected. To avoid such file stat ambiguity around truncation, this patch specifies checkambig=True to revlog.__init__(). This makes revlog write changes out with checkambig=True. Even though changes of 00changelog.i themselves are written out at changelog._finalize(), this checkambig=True is needed, because revlog.checkinlinesize(), which is invoked at the end of changelog._finalize(), might replace already changed 00changelog.i by converted one. Even after this patch, avoiding file stat ambiguity of 00changelog.i around truncation isn't yet completed, because truncation side isn't aware of this issue. This is a part of ExactCacheValidationPlan. https://www.mercurial-scm.org/wiki/ExactCacheValidationPlan

changelog: specify checkambig=True to avoid ambiguity around truncation If steps below occurs at "the same time in sec", all of mtime, ctime and size are same between (1) and (3). 1. append data to 00changelog.i (and close transaction) 2. discard appended data by truncation (strip or rollback) 3. append same size but different data to 00changelog.i again Therefore, cache validation doesn't work after (3) as expected. To avoid such file stat ambiguity around truncation, this patch specifies checkambig=True for renaming or opening to write changes out at finalization. Even after this patch, avoiding file stat ambiguity of 00changelog.i around truncation isn't yet completed, because truncation side isn't aware of this issue. This is a part of ExactCacheValidationPlan. https://www.mercurial-scm.org/wiki/ExactCacheValidationPlan

manifest: specify checkambig=True to revlog.__init__, to avoid ambiguity If steps below occurs at "the same time in sec", all of mtime, ctime and size are same between (1) and (3). 1. append data to 00manifest.i (and close transaction) 2. discard appended data by truncation (strip or rollback) 3. append same size but different data to 00manifest.i again Therefore, cache validation doesn't work after (3) as expected. To avoid such file stat ambiguity around truncation, this patch specifies checkambig=True to revlog.__init__(). This makes revlog write changes out with checkambig=True. Even after this patch, avoiding file stat ambiguity of 00manifest.i around truncation isn't yet completed, because truncation side isn't aware of this issue. This is a part of ExactCacheValidationPlan. https://www.mercurial-scm.org/wiki/ExactCacheValidationPlan

revlog: specify checkambig at writing to avoid file stat ambiguity This allows revlog-style files to be written out with checkambig=True easily. Because avoiding file stat ambiguity is needed only for filecache-ed manifest and changelog, this patch does: - use False for default value of checkambig - focus only on writing changes of index file out This patch also adds optional argument checkambig to _divert/_delay for changelog, to safely accept checkambig specified in revlog layer. But this argument can be fully ignored, because: - changes are written into other than index file, if name != target - changes are never written into index file, otherwise (into pending file by _divert, or into in-memory buffer by _delay) This is a part of ExactCacheValidationPlan. https://www.mercurial-scm.org/wiki/ExactCacheValidationPlan