tests/svn/svndump-move.sh

branchmap: Save changectx creation during update

The newly introduced `branchmap` function allows us to skip the
creation of changectx objects. This speeds up the construction of
the branchmap.

On the mozilla repository (117293 changesets, 15490 mutable)

Before:
  ! impactable 19.9
  ! mutable 0.576
  ! unserved 3.16

After:
  ! impactable 7.03 (2.8x faster)
  ! mutable 0.352 (1.6x)
  ! unserved 1.15 (2.7x)

On the cpython repository (81418 changesets, 6418 mutable)

Before:
  ! impactable 15.9
  ! mutable 0.451
  ! unserved 0.861

After:
  ! impactable 6.55 (2.4x faster)
  ! mutable 0.170 (2.6x faster)
  ! unserved 0.289 (2.9x faster)

On the pypy repository (58852 changesets)

Before:
  ! impactable 13.6

After:
  ! impactable 6.17 (2.2x faster)

On my Mercurial repository (18295 changesets, 2210 mutable)

Before:
  ! impactable 23.9
  ! mutable 0.368
  ! unserved 0.057

After:
  ! impactable 1.31 (18x faster)
  ! mutable 0.042 (8.7x)
  ! unserved 0.025 (2.2x)

#!/bin/sh
#
# Use this script to generate move.svndump
#

mkdir temp
cd temp

mkdir project-orig
cd project-orig
mkdir trunk
echo a > trunk/a
mkdir trunk/d1
mkdir trunk/d2
echo b > trunk/d1/b
echo c > trunk/d1/c
echo d > trunk/d2/d
cd ..

svnadmin create svn-repo
svnurl=file://`pwd`/svn-repo
svn import project-orig $svnurl -m "init projA"

svn co $svnurl project
cd project
# Build a module renaming chain which used to confuse the converter.
# Update svn repository
echo a >> trunk/a
echo c >> trunk/d1/c
svn ci -m commitbeforemove
svn mv $svnurl/trunk $svnurl/subproject -m movedtrunk
svn up
mkdir subproject/trunk
svn add subproject/trunk
svn ci -m createtrunk
mkdir subproject/branches
svn add subproject/branches
svn ci -m createbranches
svn mv $svnurl/subproject/d1 $svnurl/subproject/trunk/d1 -m moved1
svn mv $svnurl/subproject/d2 $svnurl/subproject/trunk/d2 -m moved2
svn up
echo b >> subproject/trunk/d1/b

svn rm subproject/trunk/d2
svn ci -m "changeb and rm d2"
svn mv $svnurl/subproject/trunk/d1 $svnurl/subproject/branches/d1 -m moved1again

if svn help copy | grep 'SRC\[@REV\]' > /dev/null 2>&1; then
    # SVN >= 1.5 replaced the -r REV syntax with @REV
    # Copy a file from a past revision
    svn copy $svnurl/subproject/trunk/d2/d@7 $svnurl/subproject/trunk -m copyfilefrompast
    # Copy a directory from a past revision
    svn copy $svnurl/subproject/trunk/d2@7 $svnurl/subproject/trunk -m copydirfrompast
else
    # Copy a file from a past revision
    svn copy -r 7 $svnurl/subproject/trunk/d2/d $svnurl/subproject/trunk -m copyfilefrompast
    # Copy a directory from a past revision
    svn copy -r 7 $svnurl/subproject/trunk/d2 $svnurl/subproject/trunk -m copydirfrompast
fi

# Copy a directory while removing a subdirectory
svn up
mkdir -p subproject/trunk/d3/d31
echo e > subproject/trunk/d3/d31/e
echo f > subproject/trunk/d3/f
svn add subproject/trunk/d3
svn ci -m "add d3"
svn copy subproject/trunk/d3 subproject/trunk/d4
svn rm subproject/trunk/d3/d31
svn ci -m "copy dir and remove subdir"

# Test directory moves
svn up
mkdir -p subproject/trunk/d4old
echo g > subproject/trunk/d4old/g
svn add subproject/trunk/d4old
svn ci -m "add d4old"
svn mv subproject/trunk/d4old subproject/trunk/d4new
svn ci -m "rename d4old into d4new"

cd ..

svnadmin dump svn-repo > ../move.svndump