svnimport: avoid open "-|" list form for Perl 5.6

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/git-svnimport.perl b/git-svnimport.perl
index c536d7026d4c56dbf5ca0ccb1a93c25a956a64ba..ee2940f4803955f2746baf3c78f64a67b4790cab 100755 (executable)
--- a/git-svnimport.perl
+++ b/git-svnimport.perl
@@ -10,7 +10,6 @@
 # The head revision is on branch "origin" by default.
 # You can change that with the '-o' option.
 
-require 5.008; # for shell-safe open("-|",LIST)
 use strict;
 use warnings;
 use Getopt::Std;
@@ -322,8 +321,12 @@ sub get_file($$$) {
                return undef unless defined $name;
        }
 
-       open my $F, '-|', "git-hash-object", "-w", $name
+       my $pid = open(my $F, '-|');
+       die $! unless defined $pid;
+       if (!$pid) {
+           exec("git-hash-object", "-w", $name)
                or die "Cannot create object: $!\n";
+       }
        my $sha = <$F>;
        chomp $sha;
        close $F;
@@ -398,7 +401,12 @@ sub copy_path($$$$$$$$) {
                        $srcpath =~ s#/*$#/#;
        }
        
-       open my $f,"-|","git-ls-tree","-r","-z",$gitrev,$srcpath;
+       my $pid = open my $f,'-|';
+       die $! unless defined $pid;
+       if (!$pid) {
+               exec("git-ls-tree","-r","-z",$gitrev,$srcpath)
+                       or die $!;
+       }
        local $/ = "\0";
        while(<$f>) {
                chomp;
@@ -554,7 +562,11 @@ sub commit {
                                @o1 = @old;
                                @old = ();
                        }
-                       open my $F, "-|", "git-ls-files", "-z", @o1 or die $!;
+                       my $pid = open my $F, "-|";
+                       die "$!" unless defined $pid;
+                       if (!$pid) {
+                               exec("git-ls-files", "-z", @o1) or die $!;
+                       }
                        @o1 = ();
                        local $/ = "\0";
                        while(<$F>) {