From 941e5fe766fcfc323fba4648a0981948da045bd0 Mon Sep 17 00:00:00 2001
From: PHO <pho@cielonegro.org>
Date: Fri, 7 Aug 2015 16:38:15 +0900
Subject: [PATCH] New configuration variable: USE_CABAL_COMMAND

---
 cabal-package.mk | 35 +++++++++++++++++++++++++++--------
 1 file changed, 27 insertions(+), 8 deletions(-)

diff --git a/cabal-package.mk b/cabal-package.mk
index 6c96697..65404dc 100644
--- a/cabal-package.mk
+++ b/cabal-package.mk
@@ -2,6 +2,10 @@
 #
 # Variables:
 #
+#   USE_CABAL_COMMAND :: whether to use the cabal(1) command instead
+#   of ./Setup
+#     default: "YES" if it's in the PATH, "NO" otherwise.
+#
 #   CONFIGURE_ARGS :: arguments to be passed to ./Setup configure
 #     default: --disable-optimization
 #
@@ -9,6 +13,7 @@
 #
 
 AUTOCONF ?= autoconf
+CABAL    ?= cabal
 DARCS    ?= darcs
 DITZ     ?= ditz
 FIND     ?= find
@@ -21,6 +26,20 @@ RM_RF    ?= rm -rf
 RSYNC    ?= rsync
 SUDO     ?= sudo
 
+ifndef USE_CABAL_COMMAND
+ifeq ($(shell which $(CABAL) >/dev/null 2>&1; echo $$?),0)
+USE_CABAL_COMMAND := YES
+else
+USE_CABAL_COMMAND := NO
+endif
+endif
+
+ifeq ($(strip $(USE_CABAL_COMMAND)),YES)
+SETUP_CMD := $(shell which $(CABAL))
+else
+SETUP_CMD := ./Setup
+endif
+
 CONFIGURE_ARGS ?= --disable-optimization
 HADDOCK_OPTS   ?= --hyperlink-source
 HLINT_OPTS     ?= \
@@ -52,7 +71,7 @@ BUILDINFO_FILE    := $(BUILDINFO_IN_FILE:.in=)
 all: build
 
 build: setup-config build-hook
-	./Setup build
+	$(SETUP_CMD) build
 	$(RM_RF) *.tix
 
 build-hook:
@@ -71,14 +90,14 @@ setup-config: dist/setup-config setup-config-hook $(BUILDINFO_FILE)
 
 setup-config-hook:
 
-dist/setup-config: $(CABAL_FILE) Setup $(AUTOCONF_FILE)
-	./Setup configure $(CONFIGURE_ARGS)
+dist/setup-config: $(CABAL_FILE) $(SETUP_CMD) $(AUTOCONF_FILE)
+	$(SETUP_CMD) configure $(CONFIGURE_ARGS)
 
 $(AUTOCONF_FILE): $(AUTOCONF_AC_FILE)
 	$(AUTOCONF)
 
 $(BUILDINFO_FILE): $(BUILDINFO_IN_FILE) configure
-	./Setup configure $(CONFIGURE_ARGS)
+	$(SETUP_CMD) configure $(CONFIGURE_ARGS)
 
 Setup: $(SETUP_FILE)
 	$(GHC) --make Setup
@@ -94,17 +113,17 @@ clean: clean-hook
 clean-hook:
 
 doc: setup-config
-	./Setup haddock $(HADDOCK_OPTS)
+	$(SETUP_CMD) haddock $(HADDOCK_OPTS)
 
 install: build
-	$(SUDO) ./Setup install
+	$(SUDO) $(SETUP_CMD) install
 
 sdist: setup-config
-	./Setup sdist
+	$(SETUP_CMD) sdist
 
 test: build
 	$(RM_RF) dist/test
-	./Setup test
+	$(SETUP_CMD) test
 	if ls *.tix >/dev/null 2>&1; then \
 		$(HPC) sum --output="merged.tix" --union --exclude=Main *.tix; \
 		$(HPC) markup --destdir="dist/hpc" --fun-entry-count "merged.tix"; \
-- 
2.40.0