commit: allow associating auxiliary info on-demand

diff --git a/git-svn.perl b/git-svn.perl
index bd5266c86b299bbc75878b7529820798d194fc72..6c7bd95032b890d2f79cff0d18ac6aa688a74757 100755 (executable)
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -61,8 +61,6 @@ BEGIN
        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}) {
@@ -114,6 +112,7 @@ sub _req_svn {
        $_message, $_file, $_branch_dest,
        $_template, $_shared,
        $_version, $_fetch_all, $_no_rebase, $_fetch_parent,
+       $_before, $_after,
        $_merge, $_strategy, $_preserve_merges, $_dry_run, $_local,
        $_prefix, $_no_checkout, $_url, $_verbose,
        $_commit_url, $_tag, $_merge_info, $_interactive);
@@ -258,7 +257,8 @@ sub _req_svn {
                        } ],
        'find-rev' => [ \&cmd_find_rev,
                        "Translate between SVN revision numbers and tree-ish",
-                       {} ],
+                       { 'before' => \$_before,
+                         'after' => \$_after } ],
        'rebase' => [ \&cmd_rebase, "Fetch and rebase your working directory",
                        { 'merge|m|M' => \$_merge,
                          'verbose|v' => \$_verbose,
@@ -325,27 +325,20 @@ package main;
 };
 
 # 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});
 }
 
@@ -389,7 +382,7 @@ sub usage {
        my $fd = $exit ? \*STDERR : \*STDOUT;
        print $fd <<"";
 git-svn - bidirectional operations between a single Subversion tree and git
-Usage: git svn <command> [options] [arguments]\n
+usage: git svn <command> [options] [arguments]\n
 
        print $fd "Available commands:\n" unless $cmd;
 
@@ -541,7 +534,7 @@ sub cmd_fetch {
        }
        my ($remote) = @_;
        if (@_ > 1) {
-               die "Usage: $0 fetch [--all] [--parent] [svn-remote]\n";
+               die "usage: $0 fetch [--all] [--parent] [svn-remote]\n";
        }
        $Git::SVN::no_reuse_existing = undef;
        if ($_fetch_parent) {
@@ -1191,7 +1184,13 @@ sub cmd_find_rev {
                            "$head history\n";
                }
                my $desired_revision = substr($revision_or_hash, 1);
-               $result = $gs->rev_map_get($desired_revision, $uuid);
+               if ($_before) {
+                       $result = $gs->find_rev_before($desired_revision, 1);
+               } elsif ($_after) {
+                       $result = $gs->find_rev_after($desired_revision, 1);
+               } else {
+                       $result = $gs->rev_map_get($desired_revision, $uuid);
+               }
        } else {
                my (undef, $rev, undef) = cmt_metadata($revision_or_hash);
                $result = $rev;
@@ -1405,7 +1404,7 @@ sub cmd_multi_fetch {
 # this command is special because it requires no metadata
 sub cmd_commit_diff {
        my ($ta, $tb, $url) = @_;
-       my $usage = "Usage: $0 commit-diff -r<revision> ".
+       my $usage = "usage: $0 commit-diff -r<revision> ".
                    "<tree-ish> <tree-ish> [<URL>]";
        fatal($usage) if (!defined $ta || !defined $tb);
        my $svn_path = '';