From 5a967aa593d2b8ea4bcc7aae0b70dddec736a8f7 Mon Sep 17 00:00:00 2001
From: Joey Hess <joey@kitenet.net>
Date: Wed, 27 Feb 2013 03:03:16 -0400
Subject: got make fast back down to 20 seconds

This approach could also be used to get ./ghci back.. just munge the
extracted ghc command from cabal.
---
 Makefile | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 173fccb1d..18dd788b9 100644
--- a/Makefile
+++ b/Makefile
@@ -7,11 +7,15 @@ PREFIX=/usr
 
 build: $(all)
 
-fast:
-	@if [ ! -e dist/setup-config ] || grep -- -O2 dist/setup-config; then \
-		cabal configure -f-Production; \
-	fi
-	$(MAKE) git-annex
+# We bypass cabal, and only run the main ghc --make command for a
+# fast development built. Note: Does not rebuild C libraries.
+fast: dist/caballog
+	$$(grep 'ghc --make' dist/caballog | head -n 1 | sed 's/ -O / /')
+	ln -sf dist/build/git-annex/git-annex git-annex
+
+dist/caballog: dist/setup-config
+	cabal configure -f-Production
+	cabal build -v2 | tee $@
 
 Build/SysConfig.hs: configure.hs Build/TestConfig.hs Build/Configure.hs
 	cabal configure
-- 
cgit v1.2.3