Makefile: cleanup

* updating init to either pull or clone, not do both
* make sure it building only when it needs to
* make some variables overridable
* use variables when they should be used instead of direct text
* add V verbosity variable

Makefile

@@ -1,9 +1,18 @@
V ?= 0

SRC_DIR = src
TEST_DIR = test
BUILD_DIR = build

PREFIX = .
DIST_DIR = ${PREFIX}/dist

RHINO ?= java -jar ${BUILD_DIR}/js.jar

CLOSURE_COMPILER = ${BUILD_DIR}/google-compiler-20091218.jar

MINJAR ?= java -jar ${CLOSURE_COMPILER}

BASE_FILES = ${SRC_DIR}/core.js\
	${SRC_DIR}/support.js\
	${SRC_DIR}/data.js\
@@ -26,44 +35,58 @@ MODULES = ${SRC_DIR}/intro.js\
JQ = ${DIST_DIR}/jquery.js
JQ_MIN = ${DIST_DIR}/jquery.min.js

JQ_VER = `cat version.txt`
VER = sed s/@VERSION/${JQ_VER}/
SIZZLE_DIR = ${SRC_DIR}/sizzle
QUNIT_DIR = ${TEST_DIR}/qunit

RHINO = java -jar ${BUILD_DIR}/js.jar
MINJAR = java -jar ${BUILD_DIR}/google-compiler-20091218.jar
JQ_VER = $(shell cat version.txt)
VER = sed s/@VERSION/${JQ_VER}/

DATE=`git log -1 --pretty=format:%ad`
DATE=$(shell git log -1 --pretty=format:%ad)

all: jquery lint min
all: init jquery min lint
	@@echo "jQuery build complete."

${DIST_DIR}:
	@@mkdir -p ${DIST_DIR}

ifeq ($(strip $(V)),0)
verbose = --quiet
else ifeq ($(strip $(V)),1)
verbose =
else
verbose = --verbose
endif

define clone_or_pull
-@@if test ! -d $(strip ${1})/.git; then \
		echo "Cloning $(strip ${1})..."; \
		git clone $(strip ${verbose}) --depth=1 $(strip ${2}) $(strip ${1}); \
	else \
		echo "Pulling $(strip ${1})..."; \
		git --git-dir=$(strip ${1})/.git pull $(strip ${verbose}) origin master; \
	fi

endef

init:
	@@echo "Grabbing external dependencies..."
	@@if test ! -d test/qunit/.git; then git clone git://github.com/jquery/qunit.git test/qunit; fi
	@@if test ! -d src/sizzle/.git; then git clone git://github.com/jeresig/sizzle.git src/sizzle; fi
	- @@cd src/sizzle && git pull origin master > /dev/null 2>&1
	- @@cd test/qunit && git pull origin master > /dev/null 2>&1
	$(call clone_or_pull, ${QUNIT_DIR}, git://github.com/jquery/qunit.git)
	$(call clone_or_pull, ${SIZZLE_DIR}, git://github.com/jeresig/sizzle.git)

jquery: ${DIST_DIR} selector ${JQ}
jq: ${DIST_DIR} ${JQ}
jquery: ${JQ}
jq: ${JQ}

${JQ}: selector ${MODULES}
${JQ}: ${MODULES} ${DIST_DIR}
	@@echo "Building" ${JQ}

	@@mkdir -p ${DIST_DIR}

	@@cat ${MODULES} | \
		sed 's/.function..jQuery...{//' | \
		sed 's/}...jQuery..;//' | \
		sed 's/Date:./&'"${DATE}"'/' | \
		${VER} > ${JQ};

selector: ${DIST_DIR} init
${SRC_DIR}/selector.js: ${SIZZLE_DIR}/sizzle.js
	@@echo "Building selector code from Sizzle"
	@@sed '/EXPOSE/r src/sizzle-jquery.js' src/sizzle/sizzle.js | grep -v window.Sizzle > src/selector.js
	@@sed '/EXPOSE/r src/sizzle-jquery.js' ${SIZZLE_DIR}/sizzle.js | grep -v window.Sizzle > ${SRC_DIR}/selector.js

lint: ${JQ}
	@@echo "Checking jQuery against JSLint..."
@@ -74,8 +97,8 @@ min: ${JQ_MIN}
${JQ_MIN}: ${JQ}
	@@echo "Building" ${JQ_MIN}

	@@head -15 ${JQ} > ${JQ_MIN}
	@@${MINJAR} --js ${JQ} --warning_level QUIET >> ${JQ_MIN}
	@@head -$(shell grep -m 1 -n '*/' ${JQ} | cut -f1 -d:) ${JQ} > ${JQ_MIN}
	@@${MINJAR} --js ${JQ} --warning_level QUIET --js_output_file ${JQ_MIN}

clean:
	@@echo "Removing Distribution directory:" ${DIST_DIR}
@@ -86,3 +109,5 @@ clean:

	@@echo "Removing cloned directories"
	@@rm -rf test/qunit src/sizzle

.PHONY: all jquery lint min init jq clean