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.
#require bzr
$ . "$TESTDIR/bzr-definitions"
Work around https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=944379
$ mkdir -p "${HOME}/.config/breezy"
empty directory
$ mkdir test-empty
$ cd test-empty
$ brz init -q source
$ cd source
$ echo content > a
$ brz add -q a
$ brz commit -q -m 'Initial add'
$ mkdir empty
$ brz add -q empty
$ brz commit -q -m 'Empty directory added'
$ echo content > empty/something
$ brz add -q empty/something
$ brz commit -q -m 'Added file into directory'
$ cd ..
$ hg convert source source-hg
initializing destination source-hg repository
scanning source...
sorting...
converting...
2 Initial add
1 Empty directory added
0 Added file into directory
$ manifest source-hg 1
% manifest of 1
644 a
$ manifest source-hg tip
% manifest of tip
644 a
644 empty/something
$ cd ..
directory renames
$ mkdir test-dir-rename
$ cd test-dir-rename
$ brz init -q source
$ cd source
$ mkdir tpyo
$ echo content > tpyo/something
$ brz add -q tpyo
$ brz commit -q -m 'Added directory'
$ brz mv tpyo typo
tpyo => typo
$ brz commit -q -m 'Oops, typo'
$ cd ..
$ hg convert source source-hg
initializing destination source-hg repository
scanning source...
sorting...
converting...
1 Added directory
0 Oops, typo
$ manifest source-hg 0
% manifest of 0
644 tpyo/something
$ manifest source-hg tip
% manifest of tip
644 typo/something
$ cd ..
nested directory renames
$ mkdir test-nested-dir-rename
$ cd test-nested-dir-rename
$ brz init -q source
$ cd source
$ mkdir -p firstlevel/secondlevel/thirdlevel
$ echo content > firstlevel/secondlevel/file
$ echo this_needs_to_be_there_too > firstlevel/secondlevel/thirdlevel/stuff
$ brz add -q firstlevel
$ brz commit -q -m 'Added nested directories'
$ brz mv firstlevel/secondlevel secondlevel
firstlevel/secondlevel => secondlevel
$ brz commit -q -m 'Moved secondlevel one level up'
$ cd ..
$ hg convert source source-hg
initializing destination source-hg repository
scanning source...
sorting...
converting...
1 Added nested directories
0 Moved secondlevel one level up
$ manifest source-hg tip
% manifest of tip
644 secondlevel/file
644 secondlevel/thirdlevel/stuff
$ cd ..
directory remove
$ mkdir test-dir-remove
$ cd test-dir-remove
$ brz init -q source
$ cd source
$ mkdir src
$ echo content > src/sourcecode
$ brz add -q src
$ brz commit -q -m 'Added directory'
$ brz rm -q src
$ brz commit -q -m 'Removed directory'
$ cd ..
$ hg convert source source-hg
initializing destination source-hg repository
scanning source...
sorting...
converting...
1 Added directory
0 Removed directory
$ manifest source-hg 0
% manifest of 0
644 src/sourcecode
$ manifest source-hg tip
% manifest of tip
$ cd ..
directory replace
$ mkdir test-dir-replace
$ cd test-dir-replace
$ brz init -q source
$ cd source
$ mkdir first second
$ echo content > first/file
$ echo morecontent > first/dummy
$ echo othercontent > second/something
$ brz add -q first second
$ brz commit -q -m 'Initial layout'
$ brz mv first/file second/file
first/file => second/file
$ brz mv first third
first => third
$ brz commit -q -m 'Some conflicting moves'
$ cd ..
$ hg convert source source-hg
initializing destination source-hg repository
scanning source...
sorting...
converting...
1 Initial layout
0 Some conflicting moves
$ manifest source-hg tip
% manifest of tip
644 second/file
644 second/something
644 third/dummy
$ cd ..
divergent nested renames (issue3089)
$ mkdir test-divergent-renames
$ cd test-divergent-renames
$ brz init -q source
$ cd source
$ mkdir -p a/c
$ echo a > a/fa
$ echo c > a/c/fc
$ brz add -q a
$ brz commit -q -m 'Initial layout'
$ brz mv a b
a => b
$ mkdir a
$ brz add a
add(ed|ing) a (re)
$ brz mv b/c a/c
b/c => a/c
$ brz status
added:
a/
renamed:
a/? => b/? (re)
a/c/? => a/c/? (re)
$ brz commit -q -m 'Divergent renames'
$ cd ..
$ hg convert source source-hg
initializing destination source-hg repository
scanning source...
sorting...
converting...
1 Initial layout
0 Divergent renames
$ hg -R source-hg st -C --change 1
A b/fa
a/fa
R a/fa
$ hg -R source-hg manifest -r 1
a/c/fc
b/fa
$ cd ..