difftool: Simplify print_tool_help()

Eliminate a global variable and File::Find usage by building upon
basename() and glob() instead.

Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/git-difftool.perl b/git-difftool.perl
index c0798540adee04cb7cfb6fd04ef3541a1fcbb762..ac0ed633bd1328ed6f09095c28b524f7897aa674 100755 (executable)
--- a/git-difftool.perl
+++ b/git-difftool.perl
@@ -13,17 +13,15 @@
 use 5.008;
 use strict;
 use warnings;
-use File::Basename qw(dirname);
+use File::Basename qw(basename dirname);
 use File::Copy;
 use File::Compare;
-use File::Find;
 use File::stat;
 use File::Path qw(mkpath);
 use File::Temp qw(tempdir);
 use Getopt::Long qw(:config pass_through);
 use Git;
 
-my @tools;
 my @working_tree;
 my $rc;
 my $repo = Git->repository();
@@ -65,26 +63,13 @@ sub find_worktree
 
 my $workdir = find_worktree();
 
-sub filter_tool_scripts
-{
-       if (-d $_) {
-               if ($_ ne ".") {
-                       # Ignore files in subdirectories
-                       $File::Find::prune = 1;
-               }
-       } else {
-               if ((-f $_) && ($_ ne "defaults")) {
-                       push(@tools, $_);
-               }
-       }
-}
-
 sub print_tool_help
 {
        my ($cmd, @found, @notfound);
        my $gitpath = Git::exec_path();
 
-       find(\&filter_tool_scripts, "$gitpath/mergetools");
+       my @files = map { basename($_) } glob("$gitpath/mergetools/*");
+       my @tools = sort(grep { !m{^defaults$} } @files);
 
        foreach my $tool (@tools) {
                $cmd  = "TOOL_MODE=diff";
@@ -99,10 +84,10 @@ sub print_tool_help
        }
 
        print "'git difftool --tool=<tool>' may be set to one of the following:\n";
-       print "\t$_\n" for (sort(@found));
+       print "\t$_\n" for (@found);
 
        print "\nThe following tools are valid, but not currently available:\n";
-       print "\t$_\n" for (sort(@notfound));
+       print "\t$_\n" for (@notfound);
 
        print "\nNOTE: Some of the tools listed above only work in a windowed\n";
        print "environment. If run in a terminal-only session, they will fail.\n";