posix: give checkexec a fast path; keep the check files and test read only
Before, Mercurial would create a new temporary file every time, stat it, change
its exec mode, stat it again, and delete it. Most of this dance was done to
handle the rare and not-so-essential case of VFAT mounts on unix. The cost of
that was paid by the much more common and important case of using normal file
systems.
Instead, try to create and preserve .hg/cache/checkisexec and
.hg/cache/checknoexec with and without exec flag set. If the files exist and
have correct exec flags set, we can conclude that that file system supports the
exec flag. Best case, the whole exec check can thus be done with two stat
calls. Worst case, we delete the wrong files and check as usual. That will be
because temporary loss of exec bit or on file systems without support for the
exec bit. In that case we check as we did before, with the additional overhead
of one extra stat call.
It is possible that this different test algorithm in some cases on odd file
systems will give different behaviour. Again, I think it will be rare and
special cases and I think it is worth the risk.
test-clone.t happens to show the situation where checkisexec is left behind
from the old style check, while checknoexec only will be created next time a
exec check will be performed.
setup
$ cat >> $HGRCPATH << EOF
> [extensions]
> blackbox=
> mock=$TESTDIR/mockblackbox.py
> EOF
Helper functions:
$ cacheexists() {
> [ -f .hg/cache/tags2-visible ] && echo "tag cache exists" || echo "no tag cache"
> }
$ fnodescacheexists() {
> [ -f .hg/cache/hgtagsfnodes1 ] && echo "fnodes cache exists" || echo "no fnodes cache"
> }
$ dumptags() {
> rev=$1
> echo "rev $rev: .hgtags:"
> hg cat -r$rev .hgtags
> }
# XXX need to test that the tag cache works when we strip an old head
# and add a new one rooted off non-tip: i.e. node and rev of tip are the
# same, but stuff has changed behind tip.
Setup:
$ hg init t
$ cd t
$ cacheexists
no tag cache
$ fnodescacheexists
no fnodes cache
$ hg id
000000000000 tip
$ cacheexists
no tag cache
$ fnodescacheexists
no fnodes cache
$ echo a > a
$ hg add a
$ hg commit -m "test"
$ hg co
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg identify
acb14030fe0a tip
$ hg identify -r 'wdir()'
acb14030fe0a tip
$ cacheexists
tag cache exists
No fnodes cache because .hgtags file doesn't exist
(this is an implementation detail)
$ fnodescacheexists
no fnodes cache
Try corrupting the cache
$ printf 'a b' > .hg/cache/tags2-visible
$ hg identify
acb14030fe0a tip
$ cacheexists
tag cache exists
$ fnodescacheexists
no fnodes cache
$ hg identify
acb14030fe0a tip
Create local tag with long name:
$ T=`hg identify --debug --id`
$ hg tag -l "This is a local tag with a really long name!"
$ hg tags
tip 0:acb14030fe0a
This is a local tag with a really long name! 0:acb14030fe0a
$ rm .hg/localtags
Create a tag behind hg's back:
$ echo "$T first" > .hgtags
$ cat .hgtags
acb14030fe0a21b60322c440ad2d20cf7685a376 first
$ hg add .hgtags
$ hg commit -m "add tags"
$ hg tags
tip 1:b9154636be93
first 0:acb14030fe0a
$ hg identify
b9154636be93 tip
We should have a fnodes cache now that we have a real tag
The cache should have an empty entry for rev 0 and a valid entry for rev 1.
$ fnodescacheexists
fnodes cache exists
$ f --size --hexdump .hg/cache/hgtagsfnodes1
.hg/cache/hgtagsfnodes1: size=48
0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0010: ff ff ff ff ff ff ff ff b9 15 46 36 26 b7 b4 a7 |..........F6&...|
0020: 73 e0 9e e3 c5 2f 51 0e 19 e0 5e 1f f9 66 d8 59 |s..../Q...^..f.Y|
Repeat with cold tag cache:
$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes1
$ hg identify
b9154636be93 tip
$ fnodescacheexists
fnodes cache exists
$ f --size --hexdump .hg/cache/hgtagsfnodes1
.hg/cache/hgtagsfnodes1: size=48
0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0010: ff ff ff ff ff ff ff ff b9 15 46 36 26 b7 b4 a7 |..........F6&...|
0020: 73 e0 9e e3 c5 2f 51 0e 19 e0 5e 1f f9 66 d8 59 |s..../Q...^..f.Y|
And again, but now unable to write tag cache or lock file:
#if unix-permissions
$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes1
$ chmod 555 .hg/cache
$ hg identify
b9154636be93 tip
$ chmod 755 .hg/cache
$ chmod 555 .hg
$ hg identify
b9154636be93 tip
$ chmod 755 .hg
#endif
Tag cache debug info written to blackbox log
$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes1
$ hg identify
b9154636be93 tip
$ hg blackbox -l 6
1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> identify
1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> writing 48 bytes to cache/hgtagsfnodes1
1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> 0/1 cache hits/lookups in * seconds (glob)
1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> writing .hg/cache/tags2-visible with 1 tags
1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> identify exited 0 after * seconds (glob)
1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> blackbox -l 6
Failure to acquire lock results in no write
$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes1
$ echo 'foo:1' > .hg/wlock
$ hg identify
b9154636be93 tip
$ hg blackbox -l 6
1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> identify
1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> not writing .hg/cache/hgtagsfnodes1 because lock cannot be acquired
1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> 0/1 cache hits/lookups in * seconds (glob)
1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> writing .hg/cache/tags2-visible with 1 tags
1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> identify exited 0 after * seconds (glob)
1970/01/01 00:00:00 bob @b9154636be938d3d431e75a7c906504a079bfe07 (5000)> blackbox -l 6
$ fnodescacheexists
no fnodes cache
$ rm .hg/wlock
$ rm -f .hg/cache/tags2-visible .hg/cache/hgtagsfnodes1
$ hg identify
b9154636be93 tip
Create a branch:
$ echo bb > a
$ hg status
M a
$ hg identify
b9154636be93+ tip
$ hg co first
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg id
acb14030fe0a+ first
$ hg id -r 'wdir()'
acb14030fe0a+ first
$ hg -v id
acb14030fe0a+ first
$ hg status
M a
$ echo 1 > b
$ hg add b
$ hg commit -m "branch"
created new head
Creating a new commit shouldn't append the .hgtags fnodes cache until
tags info is accessed
$ f --size --hexdump .hg/cache/hgtagsfnodes1
.hg/cache/hgtagsfnodes1: size=48
0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0010: ff ff ff ff ff ff ff ff b9 15 46 36 26 b7 b4 a7 |..........F6&...|
0020: 73 e0 9e e3 c5 2f 51 0e 19 e0 5e 1f f9 66 d8 59 |s..../Q...^..f.Y|
$ hg id
c8edf04160c7 tip
First 4 bytes of record 3 are changeset fragment
$ f --size --hexdump .hg/cache/hgtagsfnodes1
.hg/cache/hgtagsfnodes1: size=72
0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0010: ff ff ff ff ff ff ff ff b9 15 46 36 26 b7 b4 a7 |..........F6&...|
0020: 73 e0 9e e3 c5 2f 51 0e 19 e0 5e 1f f9 66 d8 59 |s..../Q...^..f.Y|
0030: c8 ed f0 41 00 00 00 00 00 00 00 00 00 00 00 00 |...A............|
0040: 00 00 00 00 00 00 00 00 |........|
Merge the two heads:
$ hg merge 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg blackbox -l3
1970/01/01 00:00:00 bob @c8edf04160c7f731e4589d66ab3ab3486a64ac28 (5000)> merge 1
1970/01/01 00:00:00 bob @c8edf04160c7f731e4589d66ab3ab3486a64ac28+b9154636be938d3d431e75a7c906504a079bfe07 (5000)> merge 1 exited 0 after * seconds (glob)
1970/01/01 00:00:00 bob @c8edf04160c7f731e4589d66ab3ab3486a64ac28+b9154636be938d3d431e75a7c906504a079bfe07 (5000)> blackbox -l3
$ hg id
c8edf04160c7+b9154636be93+ tip
$ hg status
M .hgtags
$ hg commit -m "merge"
Create a fake head, make sure tag not visible afterwards:
$ cp .hgtags tags
$ hg tag last
$ hg rm .hgtags
$ hg commit -m "remove"
$ mv tags .hgtags
$ hg add .hgtags
$ hg commit -m "readd"
$
$ hg tags
tip 6:35ff301afafe
first 0:acb14030fe0a
Add invalid tags:
$ echo "spam" >> .hgtags
$ echo >> .hgtags
$ echo "foo bar" >> .hgtags
$ echo "a5a5 invalid" >> .hg/localtags
$ cat .hgtags
acb14030fe0a21b60322c440ad2d20cf7685a376 first
spam
foo bar
$ hg commit -m "tags"
Report tag parse error on other head:
$ hg up 3
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo 'x y' >> .hgtags
$ hg commit -m "head"
created new head
$ hg tags --debug
.hgtags@75d9f02dfe28, line 2: cannot parse entry
.hgtags@75d9f02dfe28, line 4: node 'foo' is not well formed
.hgtags@c4be69a18c11, line 2: node 'x' is not well formed
tip 8:c4be69a18c11e8bc3a5fdbb576017c25f7d84663
first 0:acb14030fe0a21b60322c440ad2d20cf7685a376
$ hg tip
changeset: 8:c4be69a18c11
tag: tip
parent: 3:ac5e980c4dc0
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: head
Test tag precedence rules:
$ cd ..
$ hg init t2
$ cd t2
$ echo foo > foo
$ hg add foo
$ hg ci -m 'add foo' # rev 0
$ hg tag bar # rev 1
$ echo >> foo
$ hg ci -m 'change foo 1' # rev 2
$ hg up -C 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg tag -r 1 -f bar # rev 3
$ hg up -C 1
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo >> foo
$ hg ci -m 'change foo 2' # rev 4
created new head
$ hg tags
tip 4:0c192d7d5e6b
bar 1:78391a272241
Repeat in case of cache effects:
$ hg tags
tip 4:0c192d7d5e6b
bar 1:78391a272241
Detailed dump of tag info:
$ hg heads -q # expect 4, 3, 2
4:0c192d7d5e6b
3:6fa450212aeb
2:7a94127795a3
$ dumptags 2
rev 2: .hgtags:
bbd179dfa0a71671c253b3ae0aa1513b60d199fa bar
$ dumptags 3
rev 3: .hgtags:
bbd179dfa0a71671c253b3ae0aa1513b60d199fa bar
bbd179dfa0a71671c253b3ae0aa1513b60d199fa bar
78391a272241d70354aa14c874552cad6b51bb42 bar
$ dumptags 4
rev 4: .hgtags:
bbd179dfa0a71671c253b3ae0aa1513b60d199fa bar
Dump cache:
$ cat .hg/cache/tags2-visible
4 0c192d7d5e6b78a714de54a2e9627952a877e25a
bbd179dfa0a71671c253b3ae0aa1513b60d199fa bar
bbd179dfa0a71671c253b3ae0aa1513b60d199fa bar
78391a272241d70354aa14c874552cad6b51bb42 bar
$ f --size --hexdump .hg/cache/hgtagsfnodes1
.hg/cache/hgtagsfnodes1: size=120
0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0030: 7a 94 12 77 0c 04 f2 a8 af 31 de 17 fa b7 42 28 |z..w.....1....B(|
0040: 78 ee 5a 2d ad bc 94 3d 6f a4 50 21 7d 3b 71 8c |x.Z-...=o.P!};q.|
0050: 96 4e f3 7b 89 e5 50 eb da fd 57 89 e7 6c e1 b0 |.N.{..P...W..l..|
0060: 0c 19 2d 7d 0c 04 f2 a8 af 31 de 17 fa b7 42 28 |..-}.....1....B(|
0070: 78 ee 5a 2d ad bc 94 3d |x.Z-...=|
Corrupt the .hgtags fnodes cache
Extra junk data at the end should get overwritten on next cache update
$ echo extra >> .hg/cache/hgtagsfnodes1
$ echo dummy1 > foo
$ hg commit -m throwaway1
$ hg tags
tip 5:8dbfe60eff30
bar 1:78391a272241
$ hg blackbox -l 6
1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> tags
1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> writing 24 bytes to cache/hgtagsfnodes1
1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> 2/3 cache hits/lookups in * seconds (glob)
1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> writing .hg/cache/tags2-visible with 1 tags
1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> tags exited 0 after * seconds (glob)
1970/01/01 00:00:00 bob @8dbfe60eff306a54259cfe007db9e330e7ecf866 (5000)> blackbox -l 6
#if unix-permissions no-root
Errors writing to .hgtags fnodes cache are silently ignored
$ echo dummy2 > foo
$ hg commit -m throwaway2
$ chmod a-w .hg/cache/hgtagsfnodes1
$ rm -f .hg/cache/tags2-visible
$ hg tags
tip 6:b968051b5cf3
bar 1:78391a272241
$ hg blackbox -l 6
1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> tags
1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> couldn't write cache/hgtagsfnodes1: [Errno 13] Permission denied: '$TESTTMP/t2/.hg/cache/hgtagsfnodes1'
1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> 2/3 cache hits/lookups in * seconds (glob)
1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> writing .hg/cache/tags2-visible with 1 tags
1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> tags exited 0 after * seconds (glob)
1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> blackbox -l 6
$ chmod a+w .hg/cache/hgtagsfnodes1
$ rm -f .hg/cache/tags2-visible
$ hg tags
tip 6:b968051b5cf3
bar 1:78391a272241
$ hg blackbox -l 6
1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> tags
1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> writing 24 bytes to cache/hgtagsfnodes1
1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> 2/3 cache hits/lookups in * seconds (glob)
1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> writing .hg/cache/tags2-visible with 1 tags
1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> tags exited 0 after * seconds (glob)
1970/01/01 00:00:00 bob @b968051b5cf3f624b771779c6d5f84f1d4c3fb5d (5000)> blackbox -l 6
$ f --size .hg/cache/hgtagsfnodes1
.hg/cache/hgtagsfnodes1: size=168
$ hg -q --config extensions.strip= strip -r 6 --no-backup
#endif
Stripping doesn't truncate the tags cache until new data is available
$ rm -f .hg/cache/hgtagsfnodes1 .hg/cache/tags2-visible
$ hg tags
tip 5:8dbfe60eff30
bar 1:78391a272241
$ f --size .hg/cache/hgtagsfnodes1
.hg/cache/hgtagsfnodes1: size=144
$ hg -q --config extensions.strip= strip -r 5 --no-backup
$ hg tags
tip 4:0c192d7d5e6b
bar 1:78391a272241
$ hg blackbox -l 5
1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> writing 24 bytes to cache/hgtagsfnodes1
1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> 2/3 cache hits/lookups in * seconds (glob)
1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> writing .hg/cache/tags2-visible with 1 tags
1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> tags exited 0 after * seconds (glob)
1970/01/01 00:00:00 bob @0c192d7d5e6b78a714de54a2e9627952a877e25a (5000)> blackbox -l 5
$ f --size .hg/cache/hgtagsfnodes1
.hg/cache/hgtagsfnodes1: size=120
$ echo dummy > foo
$ hg commit -m throwaway3
$ hg tags
tip 5:035f65efb448
bar 1:78391a272241
$ hg blackbox -l 6
1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> tags
1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> writing 24 bytes to cache/hgtagsfnodes1
1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> 2/3 cache hits/lookups in * seconds (glob)
1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> writing .hg/cache/tags2-visible with 1 tags
1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> tags exited 0 after * seconds (glob)
1970/01/01 00:00:00 bob @035f65efb448350f4772141702a81ab1df48c465 (5000)> blackbox -l 6
$ f --size .hg/cache/hgtagsfnodes1
.hg/cache/hgtagsfnodes1: size=144
$ hg -q --config extensions.strip= strip -r 5 --no-backup
Test tag removal:
$ hg tag --remove bar # rev 5
$ hg tip -vp
changeset: 5:5f6e8655b1c7
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
files: .hgtags
description:
Removed tag bar
diff -r 0c192d7d5e6b -r 5f6e8655b1c7 .hgtags
--- a/.hgtags Thu Jan 01 00:00:00 1970 +0000
+++ b/.hgtags Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +1,3 @@
bbd179dfa0a71671c253b3ae0aa1513b60d199fa bar
+78391a272241d70354aa14c874552cad6b51bb42 bar
+0000000000000000000000000000000000000000 bar
$ hg tags
tip 5:5f6e8655b1c7
$ hg tags # again, try to expose cache bugs
tip 5:5f6e8655b1c7
Remove nonexistent tag:
$ hg tag --remove foobar
abort: tag 'foobar' does not exist
[255]
$ hg tip
changeset: 5:5f6e8655b1c7
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Removed tag bar
Undo a tag with rollback:
$ hg rollback # destroy rev 5 (restore bar)
repository tip rolled back to revision 4 (undo commit)
working directory now based on revision 4
$ hg tags
tip 4:0c192d7d5e6b
bar 1:78391a272241
$ hg tags
tip 4:0c192d7d5e6b
bar 1:78391a272241
Test tag rank:
$ cd ..
$ hg init t3
$ cd t3
$ echo foo > foo
$ hg add foo
$ hg ci -m 'add foo' # rev 0
$ hg tag -f bar # rev 1 bar -> 0
$ hg tag -f bar # rev 2 bar -> 1
$ hg tag -fr 0 bar # rev 3 bar -> 0
$ hg tag -fr 1 bar # rev 4 bar -> 1
$ hg tag -fr 0 bar # rev 5 bar -> 0
$ hg tags
tip 5:85f05169d91d
bar 0:bbd179dfa0a7
$ hg co 3
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo barbar > foo
$ hg ci -m 'change foo' # rev 6
created new head
$ hg tags
tip 6:735c3ca72986
bar 0:bbd179dfa0a7
Don't allow moving tag without -f:
$ hg tag -r 3 bar
abort: tag 'bar' already exists (use -f to force)
[255]
$ hg tags
tip 6:735c3ca72986
bar 0:bbd179dfa0a7
Strip 1: expose an old head:
$ hg --config extensions.mq= strip 5
saved backup bundle to $TESTTMP/t3/.hg/strip-backup/*-backup.hg (glob)
$ hg tags # partly stale cache
tip 5:735c3ca72986
bar 1:78391a272241
$ hg tags # up-to-date cache
tip 5:735c3ca72986
bar 1:78391a272241
Strip 2: destroy whole branch, no old head exposed
$ hg --config extensions.mq= strip 4
saved backup bundle to $TESTTMP/t3/.hg/strip-backup/*-backup.hg (glob)
$ hg tags # partly stale
tip 4:735c3ca72986
bar 0:bbd179dfa0a7
$ rm -f .hg/cache/tags2-visible
$ hg tags # cold cache
tip 4:735c3ca72986
bar 0:bbd179dfa0a7
Test tag rank with 3 heads:
$ cd ..
$ hg init t4
$ cd t4
$ echo foo > foo
$ hg add
adding foo
$ hg ci -m 'add foo' # rev 0
$ hg tag bar # rev 1 bar -> 0
$ hg tag -f bar # rev 2 bar -> 1
$ hg up -qC 0
$ hg tag -fr 2 bar # rev 3 bar -> 2
$ hg tags
tip 3:197c21bbbf2c
bar 2:6fa450212aeb
$ hg up -qC 0
$ hg tag -m 'retag rev 0' -fr 0 bar # rev 4 bar -> 0, but bar stays at 2
Bar should still point to rev 2:
$ hg tags
tip 4:3b4b14ed0202
bar 2:6fa450212aeb
Test that removing global/local tags does not get confused when trying
to remove a tag of type X which actually only exists as a type Y:
$ cd ..
$ hg init t5
$ cd t5
$ echo foo > foo
$ hg add
adding foo
$ hg ci -m 'add foo' # rev 0
$ hg tag -r 0 -l localtag
$ hg tag --remove localtag
abort: tag 'localtag' is not a global tag
[255]
$
$ hg tag -r 0 globaltag
$ hg tag --remove -l globaltag
abort: tag 'globaltag' is not a local tag
[255]
$ hg tags -v
tip 1:a0b6fe111088
localtag 0:bbd179dfa0a7 local
globaltag 0:bbd179dfa0a7
Test for issue3911
$ hg tag -r 0 -l localtag2
$ hg tag -l --remove localtag2
$ hg tags -v
tip 1:a0b6fe111088
localtag 0:bbd179dfa0a7 local
globaltag 0:bbd179dfa0a7
$ hg tag -r 1 -f localtag
$ hg tags -v
tip 2:5c70a037bb37
localtag 1:a0b6fe111088
globaltag 0:bbd179dfa0a7
$ hg tags -v
tip 2:5c70a037bb37
localtag 1:a0b6fe111088
globaltag 0:bbd179dfa0a7
$ hg tag -r 1 localtag2
$ hg tags -v
tip 3:bbfb8cd42be2
localtag2 1:a0b6fe111088
localtag 1:a0b6fe111088
globaltag 0:bbd179dfa0a7
$ hg tags -v
tip 3:bbfb8cd42be2
localtag2 1:a0b6fe111088
localtag 1:a0b6fe111088
globaltag 0:bbd179dfa0a7
$ cd ..
Create a repository with tags data to test .hgtags fnodes transfer
$ hg init tagsserver
$ cd tagsserver
$ touch foo
$ hg -q commit -A -m initial
$ hg tag -m 'tag 0.1' 0.1
$ echo second > foo
$ hg commit -m second
$ hg tag -m 'tag 0.2' 0.2
$ hg tags
tip 3:40f0358cb314
0.2 2:f63cc8fe54e4
0.1 0:96ee1d7354c4
$ cd ..
Cloning should pull down hgtags fnodes mappings and write the cache file
$ hg clone --pull tagsserver tagsclient
requesting all changes
adding changesets
adding manifests
adding file changes
added 4 changesets with 4 changes to 2 files
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
Missing tags2* files means the cache wasn't written through the normal mechanism.
$ ls tagsclient/.hg/cache
branch2-served
checkisexec
hgtagsfnodes1
rbc-names-v1
rbc-revs-v1
Cache should contain the head only, even though other nodes have tags data
$ f --size --hexdump tagsclient/.hg/cache/hgtagsfnodes1
tagsclient/.hg/cache/hgtagsfnodes1: size=96
0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0040: ff ff ff ff ff ff ff ff 40 f0 35 8c 19 e0 a7 d3 |........@.5.....|
0050: 8a 5c 6a 82 4d cf fb a5 87 d0 2f a3 1e 4f 2f 8a |.\j.M...../..O/.|
Running hg tags should produce tags2* file and not change cache
$ hg -R tagsclient tags
tip 3:40f0358cb314
0.2 2:f63cc8fe54e4
0.1 0:96ee1d7354c4
$ ls tagsclient/.hg/cache
branch2-served
checkisexec
hgtagsfnodes1
rbc-names-v1
rbc-revs-v1
tags2-visible
$ f --size --hexdump tagsclient/.hg/cache/hgtagsfnodes1
tagsclient/.hg/cache/hgtagsfnodes1: size=96
0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0020: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0030: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
0040: ff ff ff ff ff ff ff ff 40 f0 35 8c 19 e0 a7 d3 |........@.5.....|
0050: 8a 5c 6a 82 4d cf fb a5 87 d0 2f a3 1e 4f 2f 8a |.\j.M...../..O/.|