branchcache: skip entries that are topological heads in the on disk file
In the majority of cases, topological heads are also branch heads. We have
efficient way to get the topological heads and efficient way to retrieve
their branch information. So there is little value in putting them in the branch
cache file explicitly. On the contrary, writing them explicitly tend to create
very large cache file that are inefficient to read and update.
So the branch cache v3 format is no longer including them. This changeset focus
on the format aspect and have no focus on the performance aspect. We will cover
that later.
============================================
Tests for the admin::chainsaw-update command
============================================
setup
=====
$ hg init src
$ cd src
$ echo 1 > root
$ hg add root
$ hg ci -Am R_0
$ hg branch A
marked working directory as branch A
(branches are permanent and global, did you want a bookmark?)
$ echo 42 > bar
$ hg add bar
$ hg ci -Am A_0
$ echo 1337 > bar
$ hg ci -Am A_1
$ hg update 'desc(R_0)'
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo 1 > foo
$ hg add foo
$ hg ci -Am B_0
$ hg log -G
@ changeset: 3:bfcb8e629987
| tag: tip
| parent: 0:06f48e4098b8
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: B_0
|
| o changeset: 2:7fd8de258aa4
| | branch: A
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: A_1
| |
| o changeset: 1:ae1692b8aadb
|/ branch: A
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: A_0
|
o changeset: 0:06f48e4098b8
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: R_0
$ cd ..
Actual tests
============
Initial cloning if needed
-------------------------
$ hg admin::chainsaw-update --dest repo --rev default --source ./src
no such directory: "repo"
creating repository at "repo"
recovering after interrupted transaction, if any
no interrupted transaction available
pulling from ./src
updating to revision 'default'
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
chainsaw-update to revision 'default' for repository at '$TESTTMP/repo' done
$ cd repo
$ hg log -G
@ changeset: 3:bfcb8e629987
| tag: tip
| parent: 0:06f48e4098b8
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: B_0
|
| o changeset: 2:7fd8de258aa4
| | branch: A
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: A_1
| |
| o changeset: 1:ae1692b8aadb
|/ branch: A
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: A_0
|
o changeset: 0:06f48e4098b8
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: R_0
$ hg status -A
C foo
C root
$ cat foo
1
Test lock breacking capabilities
--------------------------------
Demonstrate lock-breaking capabilities with locks that regular Mercurial
operation would not break, because the hostnames registered in locks differ
from the current hostname (happens a lot with succesive containers):
$ ln -s invalid.host.test/effffffc:171814 .hg/store/lock
$ ln -s invalid.host.test/effffffc:171814 .hg/wlock
$ hg debuglock
lock: (.*?), process 171814, host invalid.host.test/effffffc \((\d+)s\) (re)
wlock: (.*?), process 171814, host invalid.host.test/effffffc \((\d+)s\) (re)
[2]
$ hg admin::chainsaw-update --no-purge-ignored --dest . --rev default --source ../src
loaded repository at "."
had to break store lock
had to break working copy lock
recovering after interrupted transaction, if any
no interrupted transaction available
pulling from ../src
updating to revision 'default'
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
chainsaw-update to revision 'default' for repository at '$TESTTMP/repo' done
Test file purging capabilities
------------------------------
Let's also add local modifications (tracked and untracked) to demonstrate the
purging.
$ echo untracked > bar
$ echo modified > foo
$ hg status -A
M foo
? bar
C root
$ echo 2 > ../src/foo
$ hg -R ../src commit -mB_1
$ hg admin::chainsaw-update --dest . --rev default --source ../src -q
no interrupted transaction available
$ hg log -G
@ changeset: 4:973ab81c95fb
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: B_1
|
o changeset: 3:bfcb8e629987
| parent: 0:06f48e4098b8
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: B_0
|
| o changeset: 2:7fd8de258aa4
| | branch: A
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: A_1
| |
| o changeset: 1:ae1692b8aadb
|/ branch: A
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: A_0
|
o changeset: 0:06f48e4098b8
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: R_0
$ hg status -A
C foo
C root
$ cat foo
2
Now behaviour with respect to ignored files: they are not purged if
the --no-purge-ignored flag is passed, but they are purged by default
$ echo bar > .hgignore
$ hg ci -Aqm hgignore
$ echo ignored > bar
$ hg status --all
I bar
C .hgignore
C foo
C root
$ hg admin::chainsaw-update --no-purge-ignored --dest . --rev default --source ../src -q
no interrupted transaction available
$ hg status --all
I bar
C .hgignore
C foo
C root
$ cat bar
ignored
$ hg admin::chainsaw-update --dest . --rev default --source ../src -q
no interrupted transaction available
$ hg status --all
C .hgignore
C foo
C root
$ test -f bar
[1]
test --minimal-initial-cloning variant
--------------------------------------
With `--minimal-initial-cloning`, there is no "requesting all changes"
message. Hence clone bundles would be bypassed (TODO test both cases
# with an actual clone-bundle)
$ cd ..
$ hg admin::chainsaw-update --dest repo2 --rev default --source src --initial-clone-minimal
no such directory: "repo2"
creating repository at "repo2"
recovering after interrupted transaction, if any
no interrupted transaction available
pulling from src
updating to revision 'default'
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
chainsaw-update to revision 'default' for repository at '$TESTTMP/repo2' done
$ cd repo2
$ hg log -G
@ changeset: 2:973ab81c95fb
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: B_1
|
o changeset: 1:bfcb8e629987
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: B_0
|
o changeset: 0:06f48e4098b8
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: R_0
$ hg status -A
C foo
C root
$ cat foo
2