localrepo: cache types for filtered repos (issue5043) Python introduces a reference cycle on dynamically created types via __mro__, making them very easy to leak. See https://bugs.python.org/issue17950. Previously, repo.filtered() created a type on every invocation. Long-running processes (like `hg convert`) could call this function thousands of times, leading to a steady memory leak. Since we're Unable to stop the leak because this is a bug in Python, the next best thing is to contain it. This patch adds a cache of of the dynamically generated repoview/filter types on the localrepo object. Since we only generate each type once, we cap the amount of memory that can leak to something reasonable. After this change, `hg convert` no longer leaks memory on every revision. The process will likely grow memory usage over time due to e.g. larger manifests. But there are no leaks.

convert: transcode CVS log messages by specified encoding (issue5597) Converting from CVS to Mercurial assumes that CVS log messages in "cvs rlog" output are encoded in UTF-8 (or basic Latin-1). But cvs itself is usually unaware of encoding of log messages, in practice. Therefore, if there are commits, of which log message is encoded in other than UTF-8, log message of corresponded revisions in the converted repository will be broken. To avoid such broken log messages, this patch transcodes CVS log messages by encoding specified via "convert.cvsps.logencoding" configuration. This patch accepts multiple encoding for convenience, because "multiple encoding mixed in a repository" easily occurs. For example, UTF-8 (recent POSIX), cp932 (Windows), and EUC-JP (legacy POSIX) are well known encoding for Japanese.

fsmonitor: execute setup procedures only if dirstate is already instantiated Before this patch, reposetup() of fsmonitor executes setup procedures for dirstate, even if it isn't yet instantiated at that time. On the other hand, dirstate might be already instantiated before reposetup() intentionally (prefilling by chg, for example, see bf3af0eced44 for detail). If so, just discarding already instantiated one in reposetup() causes issue. To resolve both issues above, this patch executes setup procedures, only if dirstate is already instantiated. BTW, this patch removes "del repo.unfiltered().__dict__['dirstate']", because it is responsibility of the code path, which causes instantiation of dirstate before reposetup(). After this patch, using localrepo.isfilecached() should avoid creating the corresponded entry in repo.unfiltered().__dict__.

fsmonitor: centralize setup procedures for dirstate

fsmonitor: avoid needless instantiation of dirstate Using repo.local() instead of util.safehasattr(repo, 'dirstate') also avoids executing setup procedures for remote repository (including statichttprepo). This is reason why this patch also removes a part of subsequent comment, and try/except for AttributeError at accessing to repo.wvfs.

journal: use wrapfilecache instead of wrapfunction on func of filecache wrapfilecache() on filecache-ed property works more strictly than wrapfunction() directly on func() of filecache.

journal: execute setup procedures for already instantiated dirstate If dirstate is instantiated before reposetup() of journal extension, it doesn't have "journalstorage" property, even if it is instantiated via wrapdirstate() wrapping repo.dirstate(), because wrapdirstate() works as same as original one before marking repo as "journal"-ing in reposetup(). This issue can be reproduced by running test-journal.t or test-journal-share.t with fsmonitor-run-tests.py. On the other hand, just discarding already instantiated dirstate in reposetup() prevents chg from filling dirstate before reposetup() (see bf3af0eced44 for detail). Therefore, this patch executes setup procedures for already instantiated dirstate explicitly in reposetup(). To centralize setup procedures for dirstate, this patch also factors them out from wrapdirstate().