From: "Michael G. Schwern" <schw...@pobox.com>

This means it should be able to load without git-svn being loaded.

* Load Git.pm on its own and all the needed command functions.

* It needs to grab at a git-svn lexical $_prefix representing the --prefix
  option.  Provide opt_prefix() for that.  This is a refactoring artifact.
  The prefix should really be passed into Git::SVN->new.

* Unqualify unnecessarily fully qualified globals like
  $Git::SVN::default_repo_id.

* Lexically isolate the class just to make sure nothing is leaking out.
---
 git-svn.perl | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/git-svn.perl b/git-svn.perl
index 79fe4a4..9cdf6fc 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -89,7 +89,7 @@ BEGIN {
        foreach (qw/command command_oneline command_noisy command_output_pipe
                    command_input_pipe command_close_pipe
                    command_bidi_pipe command_close_bidi_pipe/) {
-               for my $package ( qw(Git::SVN::Migration Git::SVN::Log 
Git::SVN),
+               for my $package ( qw(Git::SVN::Migration Git::SVN::Log),
                        __PACKAGE__) {
                        *{"${package}::$_"} = \&{"Git::$_"};
                }
@@ -109,6 +109,10 @@ my ($_stdin, $_help, $_edit,
        $_merge, $_strategy, $_preserve_merges, $_dry_run, $_local,
        $_prefix, $_no_checkout, $_url, $_verbose,
        $_git_format, $_commit_url, $_tag, $_merge_info, $_interactive);
+
+# This is a refactoring artifact so Git::SVN can get at this git-svn switch.
+sub opt_prefix { return $_prefix || '' }
+
 $Git::SVN::_follow_parent = 1;
 $Git::SVN::Fetcher::_placeholder_filename = ".gitignore";
 $_q ||= 0;
@@ -2038,6 +2042,7 @@ sub gc_directory {
        }
 }
 
+{
 package Git::SVN;
 use strict;
 use warnings;
@@ -2056,6 +2061,13 @@ use Memoize;  # core since 5.8.0, Jul 2002
 use Memoize::Storable;
 use POSIX qw(:signal_h);
 
+use Git qw(
+    command
+    command_oneline
+    command_noisy
+    command_output_pipe
+    command_close_pipe
+);
 use Git::SVN::Utils qw(fatal can_compress);
 
 my $can_use_yaml;
@@ -4280,12 +4292,13 @@ sub find_rev_after {
 sub _new {
        my ($class, $repo_id, $ref_id, $path) = @_;
        unless (defined $repo_id && length $repo_id) {
-               $repo_id = $Git::SVN::default_repo_id;
+               $repo_id = $default_repo_id;
        }
        unless (defined $ref_id && length $ref_id) {
-               $_prefix = '' unless defined($_prefix);
+               # Access the prefix option from the git-svn main program if 
it's loaded.
+               my $prefix = defined &::opt_prefix ? ::opt_prefix() : "";
                $_[2] = $ref_id =
-                            "refs/remotes/$_prefix$Git::SVN::default_ref_id";
+                            "refs/remotes/$prefix$default_ref_id";
        }
        $_[1] = $repo_id;
        my $dir = "$ENV{GIT_DIR}/svn/$ref_id";
@@ -4347,6 +4360,7 @@ sub uri_decode {
 sub remove_username {
        $_[0] =~ s{^([^:]*://)[^@]+@}{$1};
 }
+}
 
 package Git::SVN::Log;
 use strict;
-- 
1.7.11.1

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