Mercurial > hg
view tests/test-branches.t @ 25757:4d1382fd96ff
context: write dirstate out explicitly at the end of markcommitted
To detect change of a file without redundant comparison of file
content, dirstate recognizes a file as certainly clean, if:
(1) it is already known as "normal",
(2) dirstate entry for it has valid (= not "-1") timestamp, and
(3) mode, size and timestamp of it on the filesystem are as same as
ones expected in dirstate
This works as expected in many cases, but doesn't in the corner case
that changing a file keeps mode, size and timestamp of it on the
filesystem.
The timetable below shows steps in one of typical such situations:
---- ----------------------------------- ----------------
timestamp of "f"
----------------
dirstate file-
time action mem file system
---- ----------------------------------- ---- ----- -----
* *** ***
- 'hg transplant REV1 REV2 ...'
- transplanting REV1
....
N
- change "f", but keep size N
(via 'patch.patch()')
- 'dirstate.normal("f")' N ***
(via 'repo.commit()')
- transplanting REV2
- change "f", but keep size N
(via 'patch.patch()')
- aborted while patching
N+1
- release wlock
- 'dirstate.write()' N N N
- 'hg status' shows "r1" as "clean" N N N
---- ----------------------------------- ---- ----- -----
The most important point is that 'dirstate.write()' is executed at N+1
or later. This causes writing dirstate timestamp N of "f" out
successfully. If it is executed at N, 'parsers.pack_dirstate()'
replaces timestamp N with "-1" before actual writing dirstate out.
This issue can occur when 'hg transplant' satisfies conditions below:
- multiple revisions to be transplanted change the same file
- those revisions don't change mode and size of the file, and
- the 2nd or later revision of them fails after changing the file
The root cause of this issue is that files are changed without
flushing in-memory dirstate changes via 'repo.commit()' (even though
omitting 'dirstate.normallookup()' on files changed by 'patch.patch()'
for efficiency also causes this issue).
To detect changes of files correctly, this patch writes in-memory
dirstate changes out explicitly after marking files as clean in
'committablectx.markcommitted()', which is invoked via
'repo.commit()'.
After this change, timetable is changed as below:
---- ----------------------------------- ----------------
timestamp of "f"
----------------
dirstate file-
time action mem file system
---- ----------------------------------- ---- ----- -----
* *** ***
- 'hg transplant REV1 REV2 ...'
- transplanting REV1
....
N
- change "f", but keep size N
(via 'patch.patch()')
- 'dirstate.normal("f")' N ***
(via 'repo.commit()')
----------------------------------- ---- ----- -----
- 'dirsttate.write()' -1 -1
----------------------------------- ---- ----- -----
- transplanting REV2
- change "f", but keep size N
(via 'patch.patch()')
- aborted while patching
N+1
- release wlock
- 'dirstate.write()' -1 -1 N
- 'hg status' shows "r1" as "clean" -1 -1 N
---- ----------------------------------- ---- ----- -----
To reproduce this issue in tests certainly, this patch emulates some
timing critical actions as below:
- change "f" at N
'patch.patch()' with 'fakepatchtime.py' explicitly changes mtime
of patched files to "2000-01-01 00:00" (= N).
- 'dirstate.write()' via 'repo.commit()' at N
'fakedirstatewritetime.py' forces 'pack_dirstate()' to use
"2000-01-01 00:00" as "now", only if 'pack_dirstate()' is invoked
via 'committablectx.markcommitted()'.
- 'dirstate.write()' via releasing wlock at N+1 (or "not at N")
'pack_dirstate()' via releasing wlock uses actual timestamp at
runtime as "now", and it should be different from the "2000-01-01
00:00" of "f".
BTW, this patch doesn't test cases below, even though 'patch.patch()'
is used similarly in these cases:
1. failure of 'hg import' or 'hg qpush'
2. success of 'hg import', 'hg qpush' or 'hg transplant'
Case (1) above doesn't cause this kind of issue, because:
- if patching is aborted by conflicts, changed files are committed
changed files are marked as CLEAN, even though they are partially
patched.
- otherwise, dirstate are fully restored by 'dirstateguard'
For example in timetable above, timestamp of "f" in .hg/dirstate
is restored to -1 (or less than N), and subsequent 'hg status' can
detect changes correctly.
Case (2) always causes 'repo.status()' invocation via 'repo.commit()'
just after changing files inside same wlock scope.
---- ----------------------------------- ----------------
timestamp of "f"
----------------
dirstate file-
time action mem file system
---- ----------------------------------- ---- ----- -----
N *** ***
- make file "f" clean N
- execute 'hg foobar'
....
- 'dirstate.normal("f")' N ***
(e.g. via dirty check
or previous 'repo.commit()')
- change "f", but keep size N
- 'repo.status()' (*1)
(via 'repo.commit()')
---- ----------------------------------- ---- ----- -----
At a glance, 'repo.status()' at (*1) seems to cause similar issue (=
"changed files are treated as clean"), but actually doesn't.
'dirstate._lastnormaltime' should be N at (*1) above, because
'dirstate.normal()' via dirty check is finished at N.
Therefore, "f" changed at N (= 'dirstate._lastnormaltime') is forcibly
treated as "unsure" at (*1), and changes are detected as expected (see
'dirstate.status()' for detail).
If 'hg import' is executed with '--no-commit', 'repo.status()' isn't
invoked just after changing files inside same wlock scope.
But preceding 'dirstate.normal()' is invoked inside another wlock
scope via 'cmdutil.bailifchanged()', and in-memory changes should be
flushed at the end of that scope.
Therefore, timestamp N of clean "f" should be replaced by -1, if
'dirstate.write()' is invoked at N. It means that condition of this
issue isn't satisfied.
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
---|---|
date | Wed, 08 Jul 2015 17:01:09 +0900 |
parents | 701df761aa94 |
children | cfa0037448f4 |
line wrap: on
line source
$ hg init a $ cd a $ echo 'root' >root $ hg add root $ hg commit -d '0 0' -m "Adding root node" $ echo 'a' >a $ hg add a $ hg branch a marked working directory as branch a (branches are permanent and global, did you want a bookmark?) $ hg commit -d '1 0' -m "Adding a branch" $ hg branch q marked working directory as branch q $ echo 'aa' >a $ hg branch -C reset working directory to branch a $ hg commit -d '2 0' -m "Adding to a branch" $ hg update -C 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo 'b' >b $ hg add b $ hg branch b marked working directory as branch b $ hg commit -d '2 0' -m "Adding b branch" $ echo 'bh1' >bh1 $ hg add bh1 $ hg commit -d '3 0' -m "Adding b branch head 1" $ hg update -C 2 1 files updated, 0 files merged, 2 files removed, 0 files unresolved $ echo 'bh2' >bh2 $ hg add bh2 $ hg commit -d '4 0' -m "Adding b branch head 2" $ echo 'c' >c $ hg add c $ hg branch c marked working directory as branch c $ hg commit -d '5 0' -m "Adding c branch" reserved names $ hg branch tip abort: the name 'tip' is reserved [255] $ hg branch null abort: the name 'null' is reserved [255] $ hg branch . abort: the name '.' is reserved [255] invalid characters $ hg branch 'foo:bar' abort: ':' cannot be used in a name [255] $ hg branch 'foo > bar' abort: '\n' cannot be used in a name [255] trailing or leading spaces should be stripped before testing duplicates $ hg branch 'b ' abort: a branch of the same name already exists (use 'hg update' to switch to it) [255] $ hg branch ' b' abort: a branch of the same name already exists (use 'hg update' to switch to it) [255] verify update will accept invalid legacy branch names $ hg init test-invalid-branch-name $ cd test-invalid-branch-name $ hg pull -u "$TESTDIR"/bundles/test-invalid-branch-name.hg pulling from *test-invalid-branch-name.hg (glob) requesting all changes adding changesets adding manifests adding file changes added 3 changesets with 3 changes to 2 files 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg update '"colon:test"' 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd .. $ echo 'd' >d $ hg add d $ hg branch 'a branch name much longer than the default justification used by branches' marked working directory as branch a branch name much longer than the default justification used by branches $ hg commit -d '6 0' -m "Adding d branch" $ hg branches a branch name much longer than the default justification used by branches 7:10ff5895aa57 b 4:aee39cd168d0 c 6:589736a22561 (inactive) a 5:d8cbc61dbaa6 (inactive) default 0:19709c5a4e75 (inactive) ------- $ hg branches -a a branch name much longer than the default justification used by branches 7:10ff5895aa57 b 4:aee39cd168d0 --- Branch a $ hg log -b a changeset: 5:d8cbc61dbaa6 branch: a parent: 2:881fe2b92ad0 user: test date: Thu Jan 01 00:00:04 1970 +0000 summary: Adding b branch head 2 changeset: 2:881fe2b92ad0 branch: a user: test date: Thu Jan 01 00:00:02 1970 +0000 summary: Adding to a branch changeset: 1:dd6b440dd85a branch: a user: test date: Thu Jan 01 00:00:01 1970 +0000 summary: Adding a branch ---- Branch b $ hg log -b b changeset: 4:aee39cd168d0 branch: b user: test date: Thu Jan 01 00:00:03 1970 +0000 summary: Adding b branch head 1 changeset: 3:ac22033332d1 branch: b parent: 0:19709c5a4e75 user: test date: Thu Jan 01 00:00:02 1970 +0000 summary: Adding b branch ---- going to test branch closing $ hg branches a branch name much longer than the default justification used by branches 7:10ff5895aa57 b 4:aee39cd168d0 c 6:589736a22561 (inactive) a 5:d8cbc61dbaa6 (inactive) default 0:19709c5a4e75 (inactive) $ hg up -C b 2 files updated, 0 files merged, 4 files removed, 0 files unresolved $ echo 'xxx1' >> b $ hg commit -d '7 0' -m 'adding cset to branch b' $ hg up -C aee39cd168d0 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo 'xxx2' >> b $ hg commit -d '8 0' -m 'adding head to branch b' created new head $ echo 'xxx3' >> b $ hg commit -d '9 0' -m 'adding another cset to branch b' $ hg branches b 10:bfbe841b666e a branch name much longer than the default justification used by branches 7:10ff5895aa57 c 6:589736a22561 (inactive) a 5:d8cbc61dbaa6 (inactive) default 0:19709c5a4e75 (inactive) $ hg heads --closed changeset: 10:bfbe841b666e branch: b tag: tip user: test date: Thu Jan 01 00:00:09 1970 +0000 summary: adding another cset to branch b changeset: 8:eebb944467c9 branch: b parent: 4:aee39cd168d0 user: test date: Thu Jan 01 00:00:07 1970 +0000 summary: adding cset to branch b changeset: 7:10ff5895aa57 branch: a branch name much longer than the default justification used by branches user: test date: Thu Jan 01 00:00:06 1970 +0000 summary: Adding d branch changeset: 6:589736a22561 branch: c user: test date: Thu Jan 01 00:00:05 1970 +0000 summary: Adding c branch changeset: 5:d8cbc61dbaa6 branch: a parent: 2:881fe2b92ad0 user: test date: Thu Jan 01 00:00:04 1970 +0000 summary: Adding b branch head 2 changeset: 0:19709c5a4e75 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Adding root node $ hg heads changeset: 10:bfbe841b666e branch: b tag: tip user: test date: Thu Jan 01 00:00:09 1970 +0000 summary: adding another cset to branch b changeset: 8:eebb944467c9 branch: b parent: 4:aee39cd168d0 user: test date: Thu Jan 01 00:00:07 1970 +0000 summary: adding cset to branch b changeset: 7:10ff5895aa57 branch: a branch name much longer than the default justification used by branches user: test date: Thu Jan 01 00:00:06 1970 +0000 summary: Adding d branch changeset: 6:589736a22561 branch: c user: test date: Thu Jan 01 00:00:05 1970 +0000 summary: Adding c branch changeset: 5:d8cbc61dbaa6 branch: a parent: 2:881fe2b92ad0 user: test date: Thu Jan 01 00:00:04 1970 +0000 summary: Adding b branch head 2 changeset: 0:19709c5a4e75 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Adding root node $ hg commit -d '9 0' --close-branch -m 'prune bad branch' $ hg branches -a b 8:eebb944467c9 a branch name much longer than the default justification used by branches 7:10ff5895aa57 $ hg up -C b 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg commit -d '9 0' --close-branch -m 'close this part branch too' $ hg commit -d '9 0' --close-branch -m 're-closing this branch' abort: can only close branch heads [255] $ hg log -r tip --debug changeset: 12:e3d49c0575d8fc2cb1cd6859c747c14f5f6d499f branch: b tag: tip phase: draft parent: 8:eebb944467c9fb9651ed232aeaf31b3c0a7fc6c1 parent: -1:0000000000000000000000000000000000000000 manifest: 8:6f9ed32d2b310e391a4f107d5f0f071df785bfee user: test date: Thu Jan 01 00:00:09 1970 +0000 extra: branch=b extra: close=1 description: close this part branch too --- b branch should be inactive $ hg branches a branch name much longer than the default justification used by branches 7:10ff5895aa57 c 6:589736a22561 (inactive) a 5:d8cbc61dbaa6 (inactive) default 0:19709c5a4e75 (inactive) $ hg branches -c a branch name much longer than the default justification used by branches 7:10ff5895aa57 b 12:e3d49c0575d8 (closed) c 6:589736a22561 (inactive) a 5:d8cbc61dbaa6 (inactive) default 0:19709c5a4e75 (inactive) $ hg branches -a a branch name much longer than the default justification used by branches 7:10ff5895aa57 $ hg branches -q a branch name much longer than the default justification used by branches c a default $ hg heads b no open branch heads found on branches b [1] $ hg heads --closed b changeset: 12:e3d49c0575d8 branch: b tag: tip parent: 8:eebb944467c9 user: test date: Thu Jan 01 00:00:09 1970 +0000 summary: close this part branch too changeset: 11:d3f163457ebf branch: b user: test date: Thu Jan 01 00:00:09 1970 +0000 summary: prune bad branch $ echo 'xxx4' >> b $ hg commit -d '9 0' -m 'reopen branch with a change' reopening closed branch head 12 --- branch b is back in action $ hg branches -a b 13:e23b5505d1ad a branch name much longer than the default justification used by branches 7:10ff5895aa57 ---- test heads listings $ hg heads changeset: 13:e23b5505d1ad branch: b tag: tip user: test date: Thu Jan 01 00:00:09 1970 +0000 summary: reopen branch with a change changeset: 7:10ff5895aa57 branch: a branch name much longer than the default justification used by branches user: test date: Thu Jan 01 00:00:06 1970 +0000 summary: Adding d branch changeset: 6:589736a22561 branch: c user: test date: Thu Jan 01 00:00:05 1970 +0000 summary: Adding c branch changeset: 5:d8cbc61dbaa6 branch: a parent: 2:881fe2b92ad0 user: test date: Thu Jan 01 00:00:04 1970 +0000 summary: Adding b branch head 2 changeset: 0:19709c5a4e75 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Adding root node branch default $ hg heads default changeset: 0:19709c5a4e75 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Adding root node branch a $ hg heads a changeset: 5:d8cbc61dbaa6 branch: a parent: 2:881fe2b92ad0 user: test date: Thu Jan 01 00:00:04 1970 +0000 summary: Adding b branch head 2 $ hg heads --active a no open branch heads found on branches a [1] branch b $ hg heads b changeset: 13:e23b5505d1ad branch: b tag: tip user: test date: Thu Jan 01 00:00:09 1970 +0000 summary: reopen branch with a change $ hg heads --closed b changeset: 13:e23b5505d1ad branch: b tag: tip user: test date: Thu Jan 01 00:00:09 1970 +0000 summary: reopen branch with a change changeset: 11:d3f163457ebf branch: b user: test date: Thu Jan 01 00:00:09 1970 +0000 summary: prune bad branch default branch colors: $ cat <<EOF >> $HGRCPATH > [extensions] > color = > [color] > mode = ansi > EOF $ hg up -C c 3 files updated, 0 files merged, 2 files removed, 0 files unresolved $ hg commit -d '9 0' --close-branch -m 'reclosing this branch' $ hg up -C b 2 files updated, 0 files merged, 3 files removed, 0 files unresolved $ hg branches --color=always \x1b[0;32mb\x1b[0m\x1b[0;33m 13:e23b5505d1ad\x1b[0m (esc) \x1b[0;0ma branch name much longer than the default justification used by branches\x1b[0m\x1b[0;33m 7:10ff5895aa57\x1b[0m (esc) \x1b[0;0ma\x1b[0m\x1b[0;33m 5:d8cbc61dbaa6\x1b[0m (inactive) (esc) \x1b[0;0mdefault\x1b[0m\x1b[0;33m 0:19709c5a4e75\x1b[0m (inactive) (esc) default closed branch color: $ hg branches --color=always --closed \x1b[0;32mb\x1b[0m\x1b[0;33m 13:e23b5505d1ad\x1b[0m (esc) \x1b[0;0ma branch name much longer than the default justification used by branches\x1b[0m\x1b[0;33m 7:10ff5895aa57\x1b[0m (esc) \x1b[0;30;1mc\x1b[0m\x1b[0;33m 14:f894c25619d3\x1b[0m (closed) (esc) \x1b[0;0ma\x1b[0m\x1b[0;33m 5:d8cbc61dbaa6\x1b[0m (inactive) (esc) \x1b[0;0mdefault\x1b[0m\x1b[0;33m 0:19709c5a4e75\x1b[0m (inactive) (esc) $ cat <<EOF >> $HGRCPATH > [extensions] > color = > [color] > branches.active = green > branches.closed = blue > branches.current = red > branches.inactive = magenta > log.changeset = cyan > EOF custom branch colors: $ hg branches --color=always \x1b[0;31mb\x1b[0m\x1b[0;36m 13:e23b5505d1ad\x1b[0m (esc) \x1b[0;32ma branch name much longer than the default justification used by branches\x1b[0m\x1b[0;36m 7:10ff5895aa57\x1b[0m (esc) \x1b[0;35ma\x1b[0m\x1b[0;36m 5:d8cbc61dbaa6\x1b[0m (inactive) (esc) \x1b[0;35mdefault\x1b[0m\x1b[0;36m 0:19709c5a4e75\x1b[0m (inactive) (esc) custom closed branch color: $ hg branches --color=always --closed \x1b[0;31mb\x1b[0m\x1b[0;36m 13:e23b5505d1ad\x1b[0m (esc) \x1b[0;32ma branch name much longer than the default justification used by branches\x1b[0m\x1b[0;36m 7:10ff5895aa57\x1b[0m (esc) \x1b[0;34mc\x1b[0m\x1b[0;36m 14:f894c25619d3\x1b[0m (closed) (esc) \x1b[0;35ma\x1b[0m\x1b[0;36m 5:d8cbc61dbaa6\x1b[0m (inactive) (esc) \x1b[0;35mdefault\x1b[0m\x1b[0;36m 0:19709c5a4e75\x1b[0m (inactive) (esc) template output: $ hg branches -Tjson --closed [ { "active": true, "branch": "b", "closed": false, "current": true, "node": "e23b5505d1ad24aab6f84fd8c7cb8cd8e5e93be0", "rev": 13 }, { "active": true, "branch": "a branch name much longer than the default justification used by branches", "closed": false, "current": false, "node": "10ff5895aa5793bd378da574af8cec8ea408d831", "rev": 7 }, { "active": false, "branch": "c", "closed": true, "current": false, "node": "f894c25619d3f1484639d81be950e0a07bc6f1f6", "rev": 14 }, { "active": false, "branch": "a", "closed": false, "current": false, "node": "d8cbc61dbaa6dc817175d1e301eecb863f280832", "rev": 5 }, { "active": false, "branch": "default", "closed": false, "current": false, "node": "19709c5a4e75bf938f8e349aff97438539bb729e", "rev": 0 } ] Tests of revision branch name caching We rev branch cache is updated automatically. In these tests we use a trick to trigger rebuilds. We remove the branch head cache and run 'hg head' to cause a rebuild that also will populate the rev branch cache. revision branch cache is created when building the branch head cache $ rm -rf .hg/cache; hg head a -T '{rev}\n' 5 $ f --hexdump --size .hg/cache/rbc-* .hg/cache/rbc-names-v1: size=87 0000: 64 65 66 61 75 6c 74 00 61 00 62 00 63 00 61 20 |default.a.b.c.a | 0010: 62 72 61 6e 63 68 20 6e 61 6d 65 20 6d 75 63 68 |branch name much| 0020: 20 6c 6f 6e 67 65 72 20 74 68 61 6e 20 74 68 65 | longer than the| 0030: 20 64 65 66 61 75 6c 74 20 6a 75 73 74 69 66 69 | default justifi| 0040: 63 61 74 69 6f 6e 20 75 73 65 64 20 62 79 20 62 |cation used by b| 0050: 72 61 6e 63 68 65 73 |ranches| .hg/cache/rbc-revs-v1: size=120 0000: 19 70 9c 5a 00 00 00 00 dd 6b 44 0d 00 00 00 01 |.p.Z.....kD.....| 0010: 88 1f e2 b9 00 00 00 01 ac 22 03 33 00 00 00 02 |.........".3....| 0020: ae e3 9c d1 00 00 00 02 d8 cb c6 1d 00 00 00 01 |................| 0030: 58 97 36 a2 00 00 00 03 10 ff 58 95 00 00 00 04 |X.6.......X.....| 0040: ee bb 94 44 00 00 00 02 5f 40 61 bb 00 00 00 02 |...D...._@a.....| 0050: bf be 84 1b 00 00 00 02 d3 f1 63 45 80 00 00 02 |..........cE....| 0060: e3 d4 9c 05 80 00 00 02 e2 3b 55 05 00 00 00 02 |.........;U.....| 0070: f8 94 c2 56 80 00 00 03 |...V....| #if unix-permissions no-root no errors when revbranchcache is not writable $ echo >> .hg/cache/rbc-revs-v1 $ chmod a-w .hg/cache/rbc-revs-v1 $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' 5 $ chmod a+w .hg/cache/rbc-revs-v1 #endif recovery from invalid cache revs file with trailing data $ echo >> .hg/cache/rbc-revs-v1 $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug 5 truncating cache/rbc-revs-v1 to 120 $ f --size .hg/cache/rbc-revs* .hg/cache/rbc-revs-v1: size=120 recovery from invalid cache file with partial last record $ mv .hg/cache/rbc-revs-v1 . $ f -qDB 119 rbc-revs-v1 > .hg/cache/rbc-revs-v1 $ f --size .hg/cache/rbc-revs* .hg/cache/rbc-revs-v1: size=119 $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug 5 truncating cache/rbc-revs-v1 to 112 $ f --size .hg/cache/rbc-revs* .hg/cache/rbc-revs-v1: size=120 recovery from invalid cache file with missing record - no truncation $ mv .hg/cache/rbc-revs-v1 . $ f -qDB 112 rbc-revs-v1 > .hg/cache/rbc-revs-v1 $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug 5 $ f --size .hg/cache/rbc-revs* .hg/cache/rbc-revs-v1: size=120 recovery from invalid cache file with some bad records $ mv .hg/cache/rbc-revs-v1 . $ f -qDB 8 rbc-revs-v1 > .hg/cache/rbc-revs-v1 $ f --size .hg/cache/rbc-revs* .hg/cache/rbc-revs-v1: size=8 $ f -qDB 112 rbc-revs-v1 >> .hg/cache/rbc-revs-v1 $ f --size .hg/cache/rbc-revs* .hg/cache/rbc-revs-v1: size=120 $ hg log -r 'branch(.)' -T '{rev} ' --debug 3 4 8 9 10 11 12 13 truncating cache/rbc-revs-v1 to 8 $ rm -f .hg/cache/branch* && hg head a -T '{rev}\n' --debug 5 truncating cache/rbc-revs-v1 to 104 $ f --size --hexdump --bytes=16 .hg/cache/rbc-revs* .hg/cache/rbc-revs-v1: size=120 0000: 19 70 9c 5a 00 00 00 00 dd 6b 44 0d 00 00 00 01 |.p.Z.....kD.....| cache is updated when committing $ hg branch i-will-regret-this marked working directory as branch i-will-regret-this $ hg ci -m regrets $ f --size .hg/cache/rbc-* .hg/cache/rbc-names-v1: size=106 .hg/cache/rbc-revs-v1: size=128 update after rollback - the cache will be correct but rbc-names will will still contain the branch name even though it no longer is used $ hg up -qr '.^' $ hg rollback -qf $ f --size --hexdump .hg/cache/rbc-* .hg/cache/rbc-names-v1: size=106 0000: 64 65 66 61 75 6c 74 00 61 00 62 00 63 00 61 20 |default.a.b.c.a | 0010: 62 72 61 6e 63 68 20 6e 61 6d 65 20 6d 75 63 68 |branch name much| 0020: 20 6c 6f 6e 67 65 72 20 74 68 61 6e 20 74 68 65 | longer than the| 0030: 20 64 65 66 61 75 6c 74 20 6a 75 73 74 69 66 69 | default justifi| 0040: 63 61 74 69 6f 6e 20 75 73 65 64 20 62 79 20 62 |cation used by b| 0050: 72 61 6e 63 68 65 73 00 69 2d 77 69 6c 6c 2d 72 |ranches.i-will-r| 0060: 65 67 72 65 74 2d 74 68 69 73 |egret-this| .hg/cache/rbc-revs-v1: size=120 0000: 19 70 9c 5a 00 00 00 00 dd 6b 44 0d 00 00 00 01 |.p.Z.....kD.....| 0010: 88 1f e2 b9 00 00 00 01 ac 22 03 33 00 00 00 02 |.........".3....| 0020: ae e3 9c d1 00 00 00 02 d8 cb c6 1d 00 00 00 01 |................| 0030: 58 97 36 a2 00 00 00 03 10 ff 58 95 00 00 00 04 |X.6.......X.....| 0040: ee bb 94 44 00 00 00 02 5f 40 61 bb 00 00 00 02 |...D...._@a.....| 0050: bf be 84 1b 00 00 00 02 d3 f1 63 45 80 00 00 02 |..........cE....| 0060: e3 d4 9c 05 80 00 00 02 e2 3b 55 05 00 00 00 02 |.........;U.....| 0070: f8 94 c2 56 80 00 00 03 |...V....| cache is updated/truncated when stripping - it is thus very hard to get in a situation where the cache is out of sync and the hash check detects it $ hg --config extensions.strip= strip -r tip --nob $ f --size .hg/cache/rbc-revs* .hg/cache/rbc-revs-v1: size=112 $ cd ..