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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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Matt Mackall
urls: bulk-change BTS urls to new location
 r26420 https://bz.mercurial-scm.org/1306
Adrian Buehlmann
tests: unify test-issue*
 r12195
Initialize remote repo with branches:
$ hg init remote
$ cd remote
$ echo a > a
$ hg ci -Ama
adding a
$ hg branch br
marked working directory as branch br
Matt Mackall
branch: warn on branching
 r15615 (branches are permanent and global, did you want a bookmark?)
Adrian Buehlmann
tests: unify test-issue*
 r12195 $ hg ci -Amb
$ echo c > c
$ hg ci -Amc
adding c
$ hg log
Peter Arrenbrecht
localrepo: reuse parent manifest in commitctx if no files have changed...
 r14162 changeset: 2:ae3d9c30ec50
Adrian Buehlmann
tests: unify test-issue*
 r12195 branch: br
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: c
Peter Arrenbrecht
localrepo: reuse parent manifest in commitctx if no files have changed...
 r14162 changeset: 1:3f7f930ca414
Adrian Buehlmann
tests: unify test-issue*
 r12195 branch: br
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: b
changeset: 0:cb9a9f314b8b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: a
$ cd ..
Try cloning -r branch:
$ hg clone -rbr remote local1
adding changesets
adding manifests
adding file changes
added 3 changesets with 2 changes to 2 files
Denis Laxalde
transaction-summary: show the range of new revisions upon pull/unbundle (BC)...
 r34662 new changesets cb9a9f314b8b:ae3d9c30ec50
Adrian Buehlmann
tests: unify test-issue*
 r12195 updating to branch br
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg -R local1 parents
Peter Arrenbrecht
localrepo: reuse parent manifest in commitctx if no files have changed...
 r14162 changeset: 2:ae3d9c30ec50
Adrian Buehlmann
tests: unify test-issue*
 r12195 branch: br
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: c
Try cloning -rother clone#branch:
$ hg clone -r0 remote#br local2
adding changesets
adding manifests
adding file changes
added 3 changesets with 2 changes to 2 files
Denis Laxalde
transaction-summary: show the range of new revisions upon pull/unbundle (BC)...
 r34662 new changesets cb9a9f314b8b:ae3d9c30ec50
Adrian Buehlmann
tests: unify test-issue*
 r12195 updating to branch default
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg -R local2 parents
changeset: 0:cb9a9f314b8b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: a
Try cloning -r1 clone#branch:
$ hg clone -r1 remote#br local3
adding changesets
adding manifests
adding file changes
added 3 changesets with 2 changes to 2 files
Denis Laxalde
transaction-summary: show the range of new revisions upon pull/unbundle (BC)...
 r34662 new changesets cb9a9f314b8b:ae3d9c30ec50
Adrian Buehlmann
tests: unify test-issue*
 r12195 updating to branch br
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg -R local3 parents
Peter Arrenbrecht
localrepo: reuse parent manifest in commitctx if no files have changed...
 r14162 changeset: 1:3f7f930ca414
Adrian Buehlmann
tests: unify test-issue*
 r12195 branch: br
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: b