tests: fix regression tests failing on CentOS 7 Differential Revision: https://phab.mercurial-scm.org/D5877

packaging: modify rc detection to work with X.Yrc instead of X.Y-rc rc detection on CentOS failed without this change, resulting in upgrades from 4.9rc to 4.9 not working (4.9rc was considered more recent than 4.9). Differential Revision: https://phab.mercurial-scm.org/D5876

subrepo: avoid false unsafe path detection on Windows Subrepo paths are not normalized for the OS, so what was happening in the subsequent root path check was: root -> $TESTTMP\issue1852a\sub/repo util.expandpath(...) -> $TESTTMP\issue1852a\sub/repo os.path.realpath(...) -> $TESTTMP\issue1852a\sub\repo

Added signature for changeset 83377b4b4ae0

Added tag 4.9 for changeset 83377b4b4ae0

subrepo: reject potentially unsafe subrepo paths (BC) (SEC) In addition to the previous patch, this prohibits '~', '$nonexistent', etc. for any subrepo types. I think this is safer, and real-world subrepos wouldn't use such (local) paths.

subrepo: prohibit variable expansion on creation of hg subrepo (SEC) It's probably wrong to expand path at localrepo.*repository() layer, but fixing the layering issue would require careful inspection of call paths. So, this patch adds add a validation to the subrepo constructor. os.path.realpath(util.expandpath(root)) is what vfsmod.vfs() would do.

subrepo: extend path auditing test to include more weird patterns (SEC) While reviewing patches for the issue 5739, "$foo in repository path expanded", I realized that subrepo paths can also be cheated. This patch includes various subrepo paths which are potentially unsafe. Since an expanded subrepo path isn't audited, this bug allows symlink check bypass. As a result, a malicious subrepository could be checked out to a sub tree of e.g. $HOME directory. The good news is that the destination directory must be empty or nonexistent, so the existing ~/.bashrc wouldn't be overwritten. See the last part of the tests for details.

copyright: update to 2019 Differential Revision: https://phab.mercurial-scm.org/D5779

revlog: make sure we never use sparserevlog without general delta (issue6056) We are getting user report where the delta code tries to use `sparse-revlog` logic on repository where `generaldelta` is disabled. This can't work so we ensure the two booleans have a consistent value. Creating this kind of repository is not expected to be possible the current bug report point at a clonebundle related bug that is still to be properly isolated (Yuya Nishihara seems to a have done it). Corrupting a repository to reproduce the issue is possible. A test using this method is included in this fix.

sparserevlog: document the config option This was overlooked when this graduated from experimental.

rust-cpython: raising error.WdirUnsupported The Graph implementation of hg-cpython returns the appropriate error upon encounter with the working directory special revision number, and this gives us in particular a code path to test from test-rust-ancestors.py In the current implementation, the exception is actually raised from the iterator instantiation; we are nonetheless consuming the iterator in the test with `list()` in order not to depend on implementation details.

rust: error for WdirUnsupported with cpython conversion as exception This introduces WorkingDirectoryUnsupported as an enum variant of GraphError in the core and converts it to the expected `mercurial.error.WdirUnsupported`.

rust: working directory revision number constant This introduces the constant, but does not use it anywhere yet.

ui: remove unreachable branches and function calls from write() (issue6059) This is at least faster than ui.write() of 4.8.2. $ HGRCPATH=/dev/null hg files -R mozilla-central --time >/dev/null 4.8.2: time: real 2.340 secs (user 2.310+0.000 sys 0.020+0.000) 4.9rc0: time: real 2.580 secs (user 2.550+0.000 sys 0.020+0.000) this: time: real 2.230 secs (user 2.210+0.000 sys 0.020+0.000) Maybe the formatter should own a resolved write() function because it will just call dest.write(msg) most of the time, but that would be too much for stable.

ui: inline _writenobuf() into write() due to performance issue I'll remove redundant conditions later in this series.

ui: inline _write() into write() due to performance issue I'll remove redundant conditions later in this series.

ui: optimize buffered write with no label This was spotted while making fastannotate faster again after ditching its own formatter. Since I'm going to inline _write() into ui.write(), I decided to include this patch in this series. Here, the cost of '(self.label(a, label) for a in args)' was significant in hot loops.

partialdiscovery: avoid `undecided` related computation sooner than necessary Changeset 1d30be90c move the update of the `undecided` set within the `partialdiscovery` object in order to clarify the API. The update to the `undecided` set was unconditional in 1d30be90c and the first access to the `self.undecided` property triggered the initial computation of the set of undecided revisions. As a result, the set was computed much earlier, at a time where less information is available, immediately followed by an update of this set to remove common revisions. To fix this regression, we ignore the `undecided` related logic in `addcommons` when that `undecided` set has not been computed yet. Code that actually needs to know the `undecided` set will trigger its computation later. The change has no effects on semantic because the initial computation `undecided` set takes all knowns `common` into account. Example performance running `hg debugdiscovery` from a pypy repo missing 10 changesets: 870a89c6909d: 52.3ms (regression parent) 1d30be90c9dc: 72.0ms (regression) 5a5f504a7175: 64.8ms (this fix parent) this fix: 52.6ms

revlog: fix resolution of revlog version 0 This partially backs out cecf3f8bccd3, "revlog: always process opener options." My understanding is that if there's no "revlog1" nor "revlog2" in .hg/requires, the repository should stick to the v0 format. The reasoning is briefly described in 31a5973fcf96, "revlog: get rid of defversion." Maybe we can drop support for missing opener options, but I didn't do that in this patch.

rust: add comment about lack of wdirrev handling If hg is compiled with rust support, 'only(wdir())' crashed as "rustext.GraphError: ('ParentOutOfRange', 2147483647)", which should instead say "abort: working directory revision cannot be specified."

templatekw: fix crash on multiple latesttags resolution at wdir (issue6055) It appears not easy to fix only() to support wdir(), so this patch works around the issue by getlatesttags(). The "+1" after len(changes) doesn't matter since ctx never changes while sorting. It's just for clarity.

test-template-keywords: add test for {latesttag} of wdir() revision It's probably broken since fb672eac2702, "templatekw: choose {latesttag} by len(changes), not date (issue5659)". only() doesn't support wdir.

narrow: fix crash when restoring backup in legacy repo Using --addremove when committing in an old repo (before we started keeping .hg/narrowspec.dirstate) results in a crash. The test case modified in this patch would crash like this: abort: $ENOENT$ The issue is that when the dirstateguard is aborted, it tries to restore the backup of .hg/narrowspec.dirstate. However, since we were in an old repo, that file did not get created when the dirstateguard was created. Note that the dirstateguard is not used unless --addremove is passed. This patch fixes the bug by making restorewcbackup() not fail if the backup doesn't exist. I also made clearwcbackup() safe, just in case. Differential Revision: https://phab.mercurial-scm.org/D5634

revset: introduce an internal `_rev` predicate for '%d' usage In 24a1f67bb75a, we aligned "%d" behavior on "%ld" one, invalid revisions got silently ignored. However, soon after in 8aca89a694d4 and 26b0a7514f01, a side effect changed the behavior of "%ld" to no longer silently filter invalid revisions. After discussion on the mailing list, it was decided to align on the new %ld behavior: https://www.mercurial-scm.org/pipermail/mercurial-devel/2019-January/127291.html This changeset introduce a '_rev()' predicated that keep the benefit from 24a1f67bb75a while enforcing a more strict checking on the inputs.

mmap: backed out changeset 875d2af8cb4e There have been concrete and theoretical issues raised, this will need more work during the next cycle.

mmap: backed out changeset 74a9f428227e There have been concrete and theoretical issues raised, this will need more work during the next cycle.

help: document the minimumhgversion variable for extensions

help: modernize the example for command registration

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