Make sure that init is run before jquery is built (avoiding weird war…

…nings when running 'make jquery' or 'make min'). Additionally only attempt to run JSLint or the minifier if NodeJS is installed (avoiding a weird warning when you first run 'make' or 'make all').

Makefile

@@ -43,7 +43,7 @@ VER = sed "s/@VERSION/${JQ_VER}/"
 
 DATE=$(shell git log -1 --pretty=format:%ad)
 
-all: init jquery min lint
+all: jquery min lint
 	@@echo "jQuery build complete."
 
 ${DIST_DIR}:
@@ -68,12 +68,16 @@ define clone_or_pull
 
 endef
 
-init:
+${QUNIT_DIR}:
 	$(call clone_or_pull, ${QUNIT_DIR}, git://github.com/jquery/qunit.git)
+
+${SIZZLE_DIR}:
 	$(call clone_or_pull, ${SIZZLE_DIR}, git://github.com/jeresig/sizzle.git)
 
-jquery: ${JQ}
-jq: ${JQ}
+init: ${QUNIT_DIR} ${SIZZLE_DIR}
+
+jquery: init ${JQ}
+jq: init ${JQ}
 
 ${JQ}: ${MODULES} | ${DIST_DIR}
 	@@echo "Building" ${JQ}
@@ -88,18 +92,27 @@ ${SRC_DIR}/selector.js: ${SIZZLE_DIR}/sizzle.js
 	@@echo "Building selector code from Sizzle"
 	@@sed '/EXPOSE/r src/sizzle-jquery.js' ${SIZZLE_DIR}/sizzle.js | grep -v window.Sizzle > ${SRC_DIR}/selector.js
 
-lint: ${JQ}
-	@@echo "Checking jQuery against JSLint..."
-	@@${JS_ENGINE} build/jslint-check.js
+lint: jquery
+	@@if test ! -z ${JS_ENGINE}; then \
+		echo "Checking jQuery against JSLint..."; \
+		${JS_ENGINE} build/jslint-check.js; \
+	else \
+		echo "You must have NodeJS installed in order to test jQuery against JSLint."; \
+	fi
 
 min: ${JQ_MIN}
 
-${JQ_MIN}: ${JQ}
-	@@echo "Building" ${JQ_MIN}
-	@@${COMPILER} ${JQ} > ${JQ_MIN}.tmp
-	@@echo ";" >> ${JQ_MIN}.tmp
-	@@sed 's/\*\/(/*\/ʩ(/' ${JQ_MIN}.tmp | tr "ʩ" "\n" > ${JQ_MIN}
-	@@rm -rf ${JQ_MIN}.tmp
+${JQ_MIN}: jquery
+	@@if test ! -z ${JS_ENGINE}; then \
+		echo "Minifying jQuery" ${JQ_MIN}; \
+		${COMPILER} ${JQ} > ${JQ_MIN}.tmp; \
+		echo ";" >> ${JQ_MIN}.tmp; \
+		sed 's/\*\/(/*\/ʩ(/' ${JQ_MIN}.tmp | tr "ʩ" "\n" > ${JQ_MIN}; \
+		rm -rf ${JQ_MIN}.tmp; \
+	else \
+		echo "You must have NodeJS installed in order to minify jQuery."; \
+	fi
+
 
 clean:
 	@@echo "Removing Distribution directory:" ${DIST_DIR}