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git svn: fix shallow clone when upstream revision is too new 

Thanks to Ka-Hing Cheung for the initial bug report and patch:
> git-svn uses $ra->get_latest_revnum to find out the latest
> revision, but that can be problematic, because get_latest_revnum
> returns the latest revnum in the entire repository, not
> restricted by whatever URL you used to construct $ra. So if you
> do git svn clone -r HEAD svn://blah/blah/trunk, it won't work if
> the latest checkin is in one of the branches (it will try to
> fetch a rev that doesn't exist in trunk, making the clone
> useless).

Relying on SVN::Core::INVALID_REVNUM (-1) as the "start"
argument to SVN::Ra::get_log() proved unreliable with http(s)
URLs so the result of SVN::Ra::get_latest_revnum() is used as
the "start" argument instead.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
This commit is contained in:
Eric Wong 2009-07-20 02:06:24 -07:00
parent 0ad8ff2cd1
commit 4aacaeb3dc
2 changed files with 31 additions and 0 deletions
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1
git-svn.perl
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@ -1647,6 +1647,7 @@ sub fetch_all {
my $ra = Git::SVN::Ra->new($url);
my $uuid = $ra->get_uuid;
my $head = $ra->get_latest_revnum;
$ra->get_log("", $head, 0, 1, 0, 1, sub { $head = $_[1] });
my $base = defined $fetch ? $head : 0;
# read the max revs for wildcard expansion (branches/*, tags/*)

30
t/t9142-git-svn-shallow-clone.sh Executable file
View File

@ -0,0 +1,30 @@
#!/bin/sh
#
# Copyright (c) 2009 Eric Wong
#
test_description='git svn shallow clone'
. ./lib-git-svn.sh
test_expect_success 'setup test repository' '
svn_cmd mkdir -m "create standard layout" \
"$svnrepo"/trunk "$svnrepo"/branches "$svnrepo"/tags &&
svn_cmd cp -m "branch off trunk" \
"$svnrepo"/trunk "$svnrepo"/branches/a &&
svn_cmd co "$svnrepo"/branches/a &&
(
cd a &&
> foo &&
svn_cmd add foo &&
svn_cmd commit -m "add foo"
)
'
start_httpd
test_expect_success 'clone trunk with "-r HEAD"' '
git svn clone -r HEAD "$svnrepo/trunk" g &&
( cd g && git rev-parse --symbolic --verify HEAD )
'
test_done