Mercurial > hgsubversion

view tests/fixtures/replace_branch_with_branch.sh @ 890:78db88de9622

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Partial metadata rebuilding For highly active subversion repositories, it can be excruciatingly slow to pull updates one at a time from subversion. One way around this is to setup another mercurial repo that pulls new commits from svn periodicly (say every 5 minutes). When you want to update your repository, you can pull commits from this mercurial repository via native mercurial protocols, which will be much faster than pulling directly from svn. Unfortunately, your metadata will be out of date after doing so. Highly active repositories also tend to be very large, which means that it takes a long time to rebuild your metadata from scratch. To address this, this adds support to do a partial rebuild on the metadata by processing only revisions that have been added to the repository after the last revision we processed. With the rev map 1k revisions (~2 days) behind tip updatemeta is dramatically faster than rebuild meta: $ hg --time svn updatemeta Time: real 0.570 secs (user 0.480+0.000 sys 0.060+0.000) $ hg --time svn rebuildmeta Time: real 129.160 secs (user 128.570+0.000 sys 0.320+0.000)
author David Schleimer <dschleimer@fb.com>
date Sat, 12 May 2012 07:28:23 -0700
parents 2723152c8111
children
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#!/bin/sh

RSVN="`pwd`/rsvn.py"
export PATH=/bin:/usr/bin
mkdir temp
cd temp

svnadmin create repo
svn co file://`pwd`/repo wc

cd wc
mkdir trunk branches
cd trunk
echo a > a
cd ..
svn add *
svn ci -m 'initial'

svn up
svn cp trunk branches/branch1
svn ci -m 'branch1'
svn up
echo b > branches/branch1/b
echo d > branches/branch1/d
mkdir branches/branch1/dir
echo e > branches/branch1/dir/e
echo f > branches/branch1/f
echo g > branches/branch1/g
svn add branches/branch1/b branches/branch1/d branches/branch1/dir \
    branches/branch1/f branches/branch1/g
svn ci -m 'add b to branch1'
svn cp trunk branches/branch2
svn ci -m 'branch2'
svn up
echo c > branches/branch2/c
mkdir branches/branch2/dir
echo e2 > branches/branch2/dir/e
echo f2 > branches/branch2/f
svn add branches/branch2/c branches/branch2/dir branches/branch2/f
svn ci -m 'add c to branch2'
svn up

# Clobber branch1 with branch2
cd ..
cat > clobber.rsvn <<EOF
rdelete branches/branch1
rcopy branches/branch2 branches/branch1
rcopy branches/branch1/d branches/branch1/a
rcopy branches/branch1/dir branches/branch1/dir
rcopy branches/branch1/dir branches/branch1/dir2
rcopy branches/branch1/f branches/branch1/f
rcopy branches/branch1/g branches/branch1/g
EOF

python $RSVN --message=blah --username=evil `pwd`/repo < clobber.rsvn

svnadmin dump repo > ../replace_branch_with_branch.svndump