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[PATCH v2 1/2] git-svn: search --authors-prog in PATH too

In 36db1eddf9 ("git-svn: add --authors-prog option", 2009-05-14) the path
to authors-prog was made absolute because git-svn changes the current
directory in some situations. This makes sense if the program is part of
the repository but prevents searching via $PATH.

The old behaviour is still retained, but if the file does not exists, then
authors-prog is searched for in $PATH as any other command.

Signed-off-by: Andreas Heiduk <asheiduk@xxxxxxxxx>
Signed-off-by: Eric Wong <e@xxxxxxxxx>
 Documentation/git-svn.txt | 5 +++++
 git-svn.perl              | 3 ++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Documentation/git-svn.txt b/Documentation/git-svn.txt
index 636e09048e..b858374649 100644
--- a/Documentation/git-svn.txt
+++ b/Documentation/git-svn.txt
@@ -657,6 +657,11 @@ config key: svn.authorsfile
 	expected to return a single line of the form "Name <email>",
 	which will be treated as if included in the authors file.
+Due to historical reasons a relative 'filename' is first searched
+relative to the current directory for 'init' and 'clone' and relative
+to the root of the working tree for 'fetch'. If 'filename' is
+not found, it is searched like any other command in '$PATH'.
 config key: svn.authorsProg
diff --git a/git-svn.perl b/git-svn.perl
index a6b6c3e40c..050f2a36f4 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -374,7 +374,8 @@ version() if $_version;
 usage(1) unless defined $cmd;
 load_authors() if $_authors;
 if (defined $_authors_prog) {
-	$_authors_prog = "'" . File::Spec->rel2abs($_authors_prog) . "'";
+	my $abs_file = File::Spec->rel2abs($_authors_prog);
+	$_authors_prog = "'" . $abs_file . "'" if -x $abs_file;
 unless ($cmd =~ /^(?:clone|init|multi-init|commit-diff)$/) {