From: short <>
Date: Sat, 16 Aug 2003 07:46:44 +0000 (+0000)
Subject: +&checkcommandversion
X-Git-Tag: lufs_0_9_6_captive1~24
X-Git-Url: http://git.jankratochvil.net/?p=macros.git;a=commitdiff_plain;h=6c5a7edbfb5b833d42f0b9c4c4844ca366f32025

+&checkcommandversion
---

diff --git a/AutoGen.pm b/AutoGen.pm
index 796733e..cad8cbf 100644
--- a/AutoGen.pm
+++ b/AutoGen.pm
@@ -63,6 +63,23 @@ Supported parameters:
 '.($Options{"help"} || "");
 }
 
+sub checkcommandversion
+{
+my($class,$command,$version)=@_;
+
+	local *F;
+	do { open F,$_ or confess "Open $_: $!"; } for ("$command --version|");
+	local $/;
+	undef $/;
+	my $command_out=<F>;
+	close F;
+	my $command_version=($command_out=~m#([\d.]+)#)[0];
+	confess "$command(1) version not found in its output" if !$command_version;
+	confess "'$command' version $version or higher required"
+			# Do not take 3rd+ numbers as it would not be a number
+			if ($command_version=~/^(\d+[.]\d+)/)[0]<$version;
+}
+
 sub _readfile
 {
 my($filename)=@_;