git-svn: Simplify calculation of GIT_DIR

Since git-rev-parse already checks for the $GIT_DIR environment
variable and that it returns an actual git repository, there is no
need to repeat the checks again here.

This also fixes a problem where git-svn did not work in cases where
.git was a file with a gitdir: link.

[ew: squashed test case,
 delay setting GIT_DIR until after `git rev-parse --cdup` to fix t9101,
 (thanks to Junio)]

Signed-off-by: Barry Wardell <barry.wardell@gmail.com>
Signed-off-by: Eric Wong <normalperson@yhbt.net>

diff --git a/git-svn.perl b/git-svn.perl
index d0866946cee0076dd167cf6234dfec192d8d194e..b46795f5935dd3d61a2f3e45f979aec04d12afcb 100755 (executable)
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -61,8 +61,6 @@ my $cmd_dir_prefix = eval {
        command_oneline([qw/rev-parse --show-prefix/], STDERR => 0)
 } || '';
 
-my $git_dir_user_set = 1 if defined $ENV{GIT_DIR};
-$ENV{GIT_DIR} ||= '.git';
 $Git::SVN::Ra::_log_window_size = 100;
 
 if (! exists $ENV{SVN_SSH} && exists $ENV{GIT_SSH}) {
@@ -327,27 +325,20 @@ for (my $i = 0; $i < @ARGV; $i++) {
 };
 
 # make sure we're always running at the top-level working directory
-unless ($cmd && $cmd =~ /(?:clone|init|multi-init)$/) {
-       unless (-d $ENV{GIT_DIR}) {
-               if ($git_dir_user_set) {
-                       die "GIT_DIR=$ENV{GIT_DIR} explicitly set, ",
-                           "but it is not a directory\n";
-               }
-               my $git_dir = delete $ENV{GIT_DIR};
-               my $cdup = undef;
-               git_cmd_try {
-                       $cdup = command_oneline(qw/rev-parse --show-cdup/);
-                       $git_dir = '.' unless ($cdup);
-                       chomp $cdup if ($cdup);
-                       $cdup = "." unless ($cdup && length $cdup);
-               } "Already at toplevel, but $git_dir not found\n";
-               chdir $cdup or die "Unable to chdir up to '$cdup'\n";
-               unless (-d $git_dir) {
-                       die "$git_dir still not found after going to ",
-                           "'$cdup'\n";
-               }
-               $ENV{GIT_DIR} = $git_dir;
-       }
+if ($cmd && $cmd =~ /(?:clone|init|multi-init)$/) {
+       $ENV{GIT_DIR} ||= ".git";
+} else {
+       my ($git_dir, $cdup);
+       git_cmd_try {
+               $git_dir = command_oneline([qw/rev-parse --git-dir/]);
+       } "Unable to find .git directory\n";
+       git_cmd_try {
+               $cdup = command_oneline(qw/rev-parse --show-cdup/);
+               chomp $cdup if ($cdup);
+               $cdup = "." unless ($cdup && length $cdup);
+       } "Already at toplevel, but $git_dir not found\n";
+       $ENV{GIT_DIR} = $git_dir;
+       chdir $cdup or die "Unable to chdir up to '$cdup'\n";
        $_repository = Git->repository(Repository => $ENV{GIT_DIR});
 }
 

diff --git a/t/t9100-git-svn-basic.sh b/t/t9100-git-svn-basic.sh
index 749b75e8d4fba546b22a0280b72891c38b5ea00a..4fea8d901bbc0f713a1500adbbdd2e5886720f47 100755 (executable)
--- a/t/t9100-git-svn-basic.sh
+++ b/t/t9100-git-svn-basic.sh
@@ -306,5 +306,13 @@ test_expect_success 'git-svn works in a bare repository' '
        git svn fetch ) &&
        rm -rf bare-repo
        '
+test_expect_success 'git-svn works in in a repository with a gitdir: link' '
+       mkdir worktree gitdir &&
+       ( cd worktree &&
+       git svn init "$svnrepo" &&
+       git init --separate-git-dir ../gitdir &&
+       git svn fetch ) &&
+       rm -rf worktree gitdir
+       '
 
 test_done