From cd1a16d15bfb46b75e8b87781fe59f32aa8029c4 Mon Sep 17 00:00:00 2001
From: Marius Gavrilescu <marius@ieval.ro>
Date: Fri, 8 May 2015 11:09:46 +0300
Subject: [PATCH] Add an optional compilation cache

---
 lib/Gruntmaster/Daemon/Format.pm | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/lib/Gruntmaster/Daemon/Format.pm b/lib/Gruntmaster/Daemon/Format.pm
index a492e63..cd0e47d 100644
--- a/lib/Gruntmaster/Daemon/Format.pm
+++ b/lib/Gruntmaster/Daemon/Format.pm
@@ -6,8 +6,10 @@ use warnings;
 use parent qw/Exporter/;
 no if $] > 5.017011, warnings => 'experimental::smartmatch';
 
+use Digest::SHA qw/sha256_hex/;
 use Expect::Simple;
 use File::Basename qw/fileparse/;
+use File::Copy qw/cp/;
 use File::Slurp qw/read_file write_file/;
 use List::MoreUtils qw/natatime/;
 use Log::Log4perl qw/get_logger/;
@@ -115,7 +117,19 @@ sub prepare_files{
 
 		$file->{run} = mkrun($format);
 		write_file $name, $content;
-		prepare $name, $format;
+		if ($ENV{GRUNTMASTER_CCACHE}) {
+			my $key = lc sha256_hex($content) . '-' . $format;
+			my $cachefn = "$ENV{GRUNTMASTER_CCACHE}/$key";
+			my $exefn = fileparse $name, qr/[.][^.]*/s;
+			if (cp $cachefn, $exefn) {
+				get_logger->trace("File $name found in compilation cache")
+			} else {
+				prepare $name, $format;
+				cp $exefn, $cachefn
+			}
+		} else {
+			prepare $name, $format
+		}
 	}
 }
 
-- 
2.39.2