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changegroup: introduce safeversion()...
changegroup: introduce safeversion() In a few places (at least repair.py and shelve.py), we want to find the best changegroup version that we can assume users of the repo will understand. For example, we choose version 01 by default, but if it's a generaldelta repo, we expect clients to support version 02 anyway, so we choose that for new bundles (for e.g. "hg strip"). Let's create a helper for this functionality in changegroup, so we can reuse it elsewhere later.

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test-histedit-bookmark-motion.t
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/ tests / test-histedit-bookmark-motion.t
$ . "$TESTDIR/histedit-helpers.sh"
$ cat >> $HGRCPATH <<EOF
> [extensions]
> histedit=
> EOF
$ hg init r
$ cd r
$ for x in a b c d e f ; do
> echo $x > $x
> hg add $x
> hg ci -m $x
> done
$ hg book -r 1 will-move-backwards
$ hg book -r 2 two
$ hg book -r 2 also-two
$ hg book -r 3 three
$ hg book -r 4 four
$ hg book -r tip five
$ hg log --graph
@ changeset: 5:652413bf663e
| bookmark: five
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: f
|
o changeset: 4:e860deea161a
| bookmark: four
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: e
|
o changeset: 3:055a42cdd887
| bookmark: three
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: d
|
o changeset: 2:177f92b77385
| bookmark: also-two
| bookmark: two
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: c
|
o changeset: 1:d2ae7f538514
| bookmark: will-move-backwards
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: b
|
o changeset: 0:cb9a9f314b8b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: a
$ HGEDITOR=cat hg histedit 1
pick d2ae7f538514 1 b
pick 177f92b77385 2 c
pick 055a42cdd887 3 d
pick e860deea161a 4 e
pick 652413bf663e 5 f
# Edit history between d2ae7f538514 and 652413bf663e
#
# Commits are listed from least to most recent
#
# Commands:
#
# e, edit = use commit, but stop for amending
# m, mess = edit commit message without changing commit content
# p, pick = use commit
# d, drop = remove commit from history
# f, fold = use commit, but combine it with the one above
# r, roll = like fold, but discard this commit's description
#
$ hg histedit 1 --commands - --verbose << EOF | grep histedit
> pick 177f92b77385 2 c
> drop d2ae7f538514 1 b
> pick 055a42cdd887 3 d
> fold e860deea161a 4 e
> pick 652413bf663e 5 f
> EOF
saved backup bundle to $TESTTMP/r/.hg/strip-backup/96e494a2d553-3c6c5d92-backup.hg (glob)
histedit: moving bookmarks also-two from 177f92b77385 to b346ab9a313d
histedit: moving bookmarks five from 652413bf663e to cacdfd884a93
histedit: moving bookmarks four from e860deea161a to 59d9f330561f
histedit: moving bookmarks three from 055a42cdd887 to 59d9f330561f
histedit: moving bookmarks two from 177f92b77385 to b346ab9a313d
histedit: moving bookmarks will-move-backwards from d2ae7f538514 to cb9a9f314b8b
saved backup bundle to $TESTTMP/r/.hg/strip-backup/d2ae7f538514-48787b8d-backup.hg (glob)
$ hg log --graph
@ changeset: 3:cacdfd884a93
| bookmark: five
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: f
|
o changeset: 2:59d9f330561f
| bookmark: four
| bookmark: three
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: d
|
o changeset: 1:b346ab9a313d
| bookmark: also-two
| bookmark: two
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: c
|
o changeset: 0:cb9a9f314b8b
bookmark: will-move-backwards
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: a
$ HGEDITOR=cat hg histedit 1
pick b346ab9a313d 1 c
pick 59d9f330561f 2 d
pick cacdfd884a93 3 f
# Edit history between b346ab9a313d and cacdfd884a93
#
# Commits are listed from least to most recent
#
# Commands:
#
# e, edit = use commit, but stop for amending
# m, mess = edit commit message without changing commit content
# p, pick = use commit
# d, drop = remove commit from history
# f, fold = use commit, but combine it with the one above
# r, roll = like fold, but discard this commit's description
#
$ hg histedit 1 --commands - --verbose << EOF | grep histedit
> pick b346ab9a313d 1 c
> pick cacdfd884a93 3 f
> pick 59d9f330561f 2 d
> EOF
histedit: moving bookmarks five from cacdfd884a93 to c04e50810e4b
histedit: moving bookmarks four from 59d9f330561f to c04e50810e4b
histedit: moving bookmarks three from 59d9f330561f to c04e50810e4b
saved backup bundle to $TESTTMP/r/.hg/strip-backup/59d9f330561f-073008af-backup.hg (glob)
We expect 'five' to stay at tip, since the tipmost bookmark is most
likely the useful signal.
$ hg log --graph
@ changeset: 3:c04e50810e4b
| bookmark: five
| bookmark: four
| bookmark: three
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: d
|
o changeset: 2:c13eb81022ca
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: f
|
o changeset: 1:b346ab9a313d
| bookmark: also-two
| bookmark: two
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: c
|
o changeset: 0:cb9a9f314b8b
bookmark: will-move-backwards
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: a