1
0
Fork 0
mirror of https://github.com/git/git.git synced 2024-10-30 05:47:53 +01:00
git/t/t9107-git-svn-migrate.sh
Eric Wong 060610c572 git-svn: replace .rev_db with a more space-efficient .rev_map format
Migrations are done automatically on an as-needed basis when new
revisions are to be fetched.  Stale remote branches do not get
migrated, yet.

However, unless you set noMetadata or useSvkProps it's safe to
just do:

  find $GIT_DIR/svn -name '.rev_db*' -print0 | xargs rm -f

to purge all the old .rev_db files.

The new format is a one-way migration and is NOT compatible with
old versions of git-svn.

This is the replacement for the rev_db format, which was too big
and inefficient for large repositories with a lot of sparse history
(mainly tags).

The format is this:

  - 24 bytes for every record,
    * 4 bytes for the integer representing an SVN revision number
    * 20 bytes representing the sha1 of a git commit

  - No empty padding records like the old format

  - new records are written append-only since SVN revision numbers
    increase monotonically

  - lookups on SVN revision number are done via a binary search

  - Piping the file to xxd(1) -c24 is a good way of dumping it for
    viewing or editing, should the need ever arise.

As with .rev_db, these files are disposable unless noMetadata or
useSvmProps is set.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-12-10 21:28:25 -08:00

115 lines
4.4 KiB
Bash
Executable file

#!/bin/sh
# Copyright (c) 2006 Eric Wong
test_description='git-svn metadata migrations from previous versions'
. ./lib-git-svn.sh
test_expect_success 'setup old-looking metadata' "
cp $GIT_DIR/config $GIT_DIR/config-old-git-svn &&
mkdir import &&
cd import &&
for i in trunk branches/a branches/b \
tags/0.1 tags/0.2 tags/0.3; do
mkdir -p \$i && \
echo hello >> \$i/README || exit 1
done && \
svn import -m test . $svnrepo
cd .. &&
git-svn init $svnrepo &&
git-svn fetch &&
mv $GIT_DIR/svn/* $GIT_DIR/ &&
mv $GIT_DIR/svn/.metadata $GIT_DIR/ &&
rmdir $GIT_DIR/svn &&
git update-ref refs/heads/git-svn-HEAD refs/remotes/git-svn &&
git update-ref refs/heads/svn-HEAD refs/remotes/git-svn &&
git update-ref -d refs/remotes/git-svn refs/remotes/git-svn
"
head=`git rev-parse --verify refs/heads/git-svn-HEAD^0`
test_expect_success 'git-svn-HEAD is a real HEAD' "test -n '$head'"
test_expect_success 'initialize old-style (v0) git-svn layout' "
mkdir -p $GIT_DIR/git-svn/info $GIT_DIR/svn/info &&
echo $svnrepo > $GIT_DIR/git-svn/info/url &&
echo $svnrepo > $GIT_DIR/svn/info/url &&
git-svn migrate &&
! test -d $GIT_DIR/git-svn &&
git rev-parse --verify refs/remotes/git-svn^0 &&
git rev-parse --verify refs/remotes/svn^0 &&
test \`git config --get svn-remote.svn.url\` = '$svnrepo' &&
test \`git config --get svn-remote.svn.fetch\` = \
':refs/remotes/git-svn'
"
test_expect_success 'initialize a multi-repository repo' "
git-svn init $svnrepo -T trunk -t tags -b branches &&
git config --get-all svn-remote.svn.fetch > fetch.out &&
grep '^trunk:refs/remotes/trunk$' fetch.out &&
test -n \"\`git config --get svn-remote.svn.branches \
'^branches/\*:refs/remotes/\*$'\`\" &&
test -n \"\`git config --get svn-remote.svn.tags \
'^tags/\*:refs/remotes/tags/\*$'\`\" &&
git config --unset svn-remote.svn.branches \
'^branches/\*:refs/remotes/\*$' &&
git config --unset svn-remote.svn.tags \
'^tags/\*:refs/remotes/tags/\*$' &&
git config --add svn-remote.svn.fetch 'branches/a:refs/remotes/a' &&
git config --add svn-remote.svn.fetch 'branches/b:refs/remotes/b' &&
for i in tags/0.1 tags/0.2 tags/0.3; do
git config --add svn-remote.svn.fetch \
\$i:refs/remotes/\$i || exit 1; done
"
# refs should all be different, but the trees should all be the same:
test_expect_success 'multi-fetch works on partial urls + paths' "
git-svn multi-fetch &&
for i in trunk a b tags/0.1 tags/0.2 tags/0.3; do
git rev-parse --verify refs/remotes/\$i^0 >> refs.out || exit 1;
done &&
test -z \"\`sort < refs.out | uniq -d\`\" &&
for i in trunk a b tags/0.1 tags/0.2 tags/0.3; do
for j in trunk a b tags/0.1 tags/0.2 tags/0.3; do
if test \$j != \$i; then continue; fi
test -z \"\`git diff refs/remotes/\$i \
refs/remotes/\$j\`\" ||exit 1; done; done
"
test_expect_success 'migrate --minimize on old inited layout' "
git config --unset-all svn-remote.svn.fetch &&
git config --unset-all svn-remote.svn.url &&
rm -rf $GIT_DIR/svn &&
for i in \`cat fetch.out\`; do
path=\`expr \$i : '\\([^:]*\\):.*$'\`
ref=\`expr \$i : '[^:]*:refs/remotes/\\(.*\\)$'\`
if test -z \"\$ref\"; then continue; fi
if test -n \"\$path\"; then path=\"/\$path\"; fi
( mkdir -p $GIT_DIR/svn/\$ref/info/ &&
echo $svnrepo\$path > $GIT_DIR/svn/\$ref/info/url ) || exit 1;
done &&
git-svn migrate --minimize &&
test -z \"\`git config -l |grep -v '^svn-remote\.git-svn\.'\`\" &&
git config --get-all svn-remote.svn.fetch > fetch.out &&
grep '^trunk:refs/remotes/trunk$' fetch.out &&
grep '^branches/a:refs/remotes/a$' fetch.out &&
grep '^branches/b:refs/remotes/b$' fetch.out &&
grep '^tags/0\.1:refs/remotes/tags/0\.1$' fetch.out &&
grep '^tags/0\.2:refs/remotes/tags/0\.2$' fetch.out &&
grep '^tags/0\.3:refs/remotes/tags/0\.3$' fetch.out
grep '^:refs/remotes/git-svn' fetch.out
"
test_expect_success ".rev_db auto-converted to .rev_map.UUID" "
git-svn fetch -i trunk &&
test -z \"\$(ls $GIT_DIR/svn/trunk/.rev_db.* 2>/dev/null)\" &&
expect=\"\$(ls $GIT_DIR/svn/trunk/.rev_map.*)\" &&
test -n \"\$expect\" &&
rev_db=\$(echo \$expect | sed -e 's,_map,_db,') &&
convert_to_rev_db \$expect \$rev_db &&
rm -f \$expect &&
test -f \$rev_db &&
git-svn fetch -i trunk &&
test -z \"\$(ls $GIT_DIR/svn/trunk/.rev_db.* 2>/dev/null)\" &&
test ! -e $GIT_DIR/svn/trunk/.rev_db &&
test -f \$expect
"
test_done