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revisions: allow "x123" to refer to nodeid prefix "123"...
revisions: allow "x123" to refer to nodeid prefix "123" When resolving "123" to a revision, we try to interpret it as revnum before we try to interpret it as a nodeid hex prefix. This can lead to the shortest valid prefix being longer than necessary. This patch lets us write such nodeids in a shorter form by prefixing them with "x" instead of adding more hex digits until they're longer than the longest decimal revnum. On my hg repo with almost 69k revisions, turning this feature on saves on average 0.4% on the average nodeid length. That clearly doesn't justify this patch. However, it becomes more usefule when combined with the earlier patches in this series that let you disambiguate nodeid prefixes within a configured revset. Note that we attempt to resolve symbols as nodeid prefixes after we've exhausted all other posibilities, so this is a backwards compatible change (only queries that would previously fail may now succeed). I've still hidden this feature behind an experiemntal config option so we can roll it back if needed. Differential Revision: https://phab.mercurial-scm.org/D4041
Denis Laxalde - - Load All Authors

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test-branch-option.t
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Martin Geisler
tests: unify test-branch-option
 r11869 test branch selection options
$ hg init branch
$ cd branch
$ hg branch a
marked working directory as branch a
Matt Mackall
branch: warn on branching
 r15615 (branches are permanent and global, did you want a bookmark?)
Martin Geisler
tests: unify test-branch-option
 r11869 $ echo a > foo
$ hg ci -d '0 0' -Ama
adding foo
$ echo a2 > foo
$ hg ci -d '0 0' -ma2
$ hg up 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg branch c
marked working directory as branch c
$ echo c > foo
$ hg ci -d '0 0' -mc
$ hg tag -l z
$ cd ..
$ hg clone -r 0 branch branch2
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
Denis Laxalde
transaction-summary: show the range of new revisions upon pull/unbundle (BC)...
 r34662 new changesets 5b65ba7c951d
Martin Geisler
tests: unify test-branch-option
 r11869 updating to branch a
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd branch2
$ hg up 0
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg branch b
marked working directory as branch b
$ echo b > foo
$ hg ci -d '0 0' -mb
$ hg up 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg --encoding utf-8 branch æ
Mads Kiilerich
tests: use (esc) for all non-ASCII test output
 r12942 marked working directory as branch \xc3\xa6 (esc)
Martin Geisler
tests: unify test-branch-option
 r11869 $ echo ae1 > foo
$ hg ci -d '0 0' -mae1
$ hg up 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg --encoding utf-8 branch -f æ
Mads Kiilerich
tests: use (esc) for all non-ASCII test output
 r12942 marked working directory as branch \xc3\xa6 (esc)
Martin Geisler
tests: unify test-branch-option
 r11869 $ echo ae2 > foo
$ hg ci -d '0 0' -mae2
created new head
$ hg up 0
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg branch -f b
marked working directory as branch b
$ echo b2 > foo
$ hg ci -d '0 0' -mb2
created new head
unknown branch and fallback
$ hg in -qbz
abort: unknown branch 'z'!
Matt Mackall
tests: add exit codes to unified tests
 r12316 [255]
Martin Geisler
tests: unify test-branch-option
 r11869 $ hg in -q ../branch#z
2:f25d57ab0566
$ hg out -qbz
abort: unknown branch 'z'!
Matt Mackall
tests: add exit codes to unified tests
 r12316 [255]
Martin Geisler
tests: unify test-branch-option
 r11869
in rev c branch a
$ hg in -qr c ../branch#a
1:dd6e60a716c6
2:f25d57ab0566
$ hg in -qr c -b a
1:dd6e60a716c6
2:f25d57ab0566
out branch .
$ hg out -q ../branch#.
1:b84708d77ab7
4:65511d0e2b55
$ hg out -q -b .
1:b84708d77ab7
4:65511d0e2b55
out branch . non-ascii
$ hg --encoding utf-8 up æ
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg --encoding latin1 out -q ../branch#.
2:df5a44224d4e
3:4f4a5125ca10
$ hg --encoding latin1 out -q -b .
2:df5a44224d4e
3:4f4a5125ca10
clone branch b
$ cd ..
$ hg clone branch2#b branch3
adding changesets
adding manifests
adding file changes
added 3 changesets with 3 changes to 1 files (+1 heads)
Denis Laxalde
transaction-summary: show the range of new revisions upon pull/unbundle (BC)...
 r34662 new changesets 5b65ba7c951d:65511d0e2b55
Martin Geisler
tests: unify test-branch-option
 r11869 updating to branch b
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg -q -R branch3 heads b
2:65511d0e2b55
1:b84708d77ab7
$ hg -q -R branch3 parents
2:65511d0e2b55
$ rm -rf branch3
clone rev a branch b
$ hg clone -r a branch2#b branch3
adding changesets
adding manifests
adding file changes
added 3 changesets with 3 changes to 1 files (+1 heads)
Denis Laxalde
transaction-summary: show the range of new revisions upon pull/unbundle (BC)...
 r34662 new changesets 5b65ba7c951d:65511d0e2b55
Martin Geisler
tests: unify test-branch-option
 r11869 updating to branch a
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg -q -R branch3 heads b
2:65511d0e2b55
1:b84708d77ab7
$ hg -q -R branch3 parents
0:5b65ba7c951d
$ rm -rf branch3