localrepo: stop doing special dirstate backup at transaction open
Since the dirstate writes are already managed by the transaction, we already do
a backup of the dirstate when necessary (and even trigger one to keep `hg
rollback` happy).
We needs some special code to deal with the initial empty checkout, but it is
not too complicated.
Managing variable filename (as dirstate-v2 uses) at the "journalfile" level, is
complex and fragile (which is consistent with the fact these files are not
journal…). If we no longer do it, our life is significantly simpler.
In some sense, we apply the xkcd-1134¹ solution to our savebackup/restorebackup
problem.
[1] https://xkcd.com/1134/
(the change to test-hardlink are expect as decreasing the number of duplicated
backup drive the hardlink count down)
Test 'hg log' with a bookmark
Create the repository
$ hg init Test-D8973
$ cd Test-D8973
$ echo "bar" > foo.txt
$ hg add foo.txt
$ hg commit -m "Add foo in 'default'"
Add a bookmark for topic X
$ hg branch -f sebhtml
marked working directory as branch sebhtml
(branches are permanent and global, did you want a bookmark?)
$ hg bookmark sebhtml/99991-topic-X
$ hg up sebhtml/99991-topic-X
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo "X" > x.txt
$ hg add x.txt
$ hg commit -m "Add x.txt in 'sebhtml/99991-topic-X'"
$ hg log -B sebhtml/99991-topic-X
changeset: 1:29f39dea9bf9
branch: sebhtml
bookmark: sebhtml/99991-topic-X
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Add x.txt in 'sebhtml/99991-topic-X'
Add a bookmark for topic Y
$ hg update default
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
(leaving bookmark sebhtml/99991-topic-X)
$ echo "Y" > y.txt
$ hg add y.txt
$ hg branch -f sebhtml
marked working directory as branch sebhtml
$ hg bookmark sebhtml/99992-topic-Y
$ hg up sebhtml/99992-topic-Y
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg commit -m "Add y.txt in 'sebhtml/99992-topic-Y'"
created new head
$ hg log -B sebhtml/99992-topic-Y
changeset: 2:11df7969cf8d
branch: sebhtml
bookmark: sebhtml/99992-topic-Y
tag: tip
parent: 0:eaea25376a59
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Add y.txt in 'sebhtml/99992-topic-Y'
The log of topic Y does not interfere with the log of topic X
$ hg log -B sebhtml/99991-topic-X
changeset: 1:29f39dea9bf9
branch: sebhtml
bookmark: sebhtml/99991-topic-X
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Add x.txt in 'sebhtml/99991-topic-X'
Merge topics Y and X in the default branch
$ hg update default
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
(leaving bookmark sebhtml/99992-topic-Y)
$ hg bookmark
sebhtml/99991-topic-X 1:29f39dea9bf9
sebhtml/99992-topic-Y 2:11df7969cf8d
$ hg merge sebhtml/99992-topic-Y
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg commit -m "Merge branch 'sebhtml/99992-topic-Y' into 'default'"
$ hg update default
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg merge sebhtml/99991-topic-X
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg commit -m "Merge branch 'sebhtml/99991-topic-X' into 'default'"
Check the log of topic X, topic Y, and default branch
$ hg log -B sebhtml/99992-topic-Y
$ hg log -B sebhtml/99991-topic-X
$ hg log -b default
changeset: 4:c26ba8c1e1cb
tag: tip
parent: 3:2189f3fb90d6
parent: 1:29f39dea9bf9
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Merge branch 'sebhtml/99991-topic-X' into 'default'
changeset: 3:2189f3fb90d6
parent: 0:eaea25376a59
parent: 2:11df7969cf8d
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Merge branch 'sebhtml/99992-topic-Y' into 'default'
changeset: 0:eaea25376a59
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Add foo in 'default'
Set up multiple bookmarked heads:
$ hg bookmark merged-head
$ hg up 1
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
(leaving bookmark merged-head)
$ echo "Z" > z.txt
$ hg ci -Am 'Add Z'
adding z.txt
$ hg bookmark topic-Z
$ hg log -GT '{rev}: {branch}, {bookmarks}\n'
@ 5: sebhtml, topic-Z
|
| o 4: default, merged-head
|/|
| o 3: default,
| |\
| | o 2: sebhtml, sebhtml/99992-topic-Y
| |/
o | 1: sebhtml, sebhtml/99991-topic-X
|/
o 0: default,
Multiple revisions under bookmarked head:
$ hg log -GT '{rev}: {branch}, {bookmarks}\n' -B merged-head
o 4: default, merged-head
|\
| ~
o 3: default,
|\
~ ~
Follows multiple bookmarks:
$ hg log -GT '{rev}: {branch}, {bookmarks}\n' -B merged-head -B topic-Z
@ 5: sebhtml, topic-Z
|
~
o 4: default, merged-head
|\
| ~
o 3: default,
|\
~ ~
Filter by bookmark and branch:
$ hg log -GT '{rev}: {branch}, {bookmarks}\n' -B merged-head -B topic-Z -b default
o 4: default, merged-head
|\
| ~
o 3: default,
|\
~ ~
Unknown bookmark:
$ hg log -B unknown
abort: bookmark 'unknown' does not exist
[10]
Shouldn't accept string-matcher syntax:
$ hg log -B 're:.*'
abort: bookmark 're:.*' does not exist
[10]