A more canonical & better behaved Makefile

Author: gerhard

Makefile

@@ -1,10 +1,13 @@
-### CONFIG ###
+.ONESHELL:# single shell invocation for all lines in the recipe
+
+.DEFAULT_GOAL = help
+
+### VARIABLES ###
 #
 export PATH 	:=$(CURDIR):$(CURDIR)/scripts:$(PATH)
 
 ### TARGETS ###
 #
-default: run
 
 binary: clean ## Build the binary distribution
 	@mvnw package -P assemblies -Dgpg.skip=true
@@ -21,10 +24,10 @@ compile: ## Compile the source code
 jar: clean ## Build the JAR file
 	@mvnw package
 
-run: compile ## Run PerfTest, pass exec arguments via ARGS
-	@mvnw exec:java -Dexec.mainClass="com.rabbitmq.perf.PerfTest" -Dexec.args="${ARGS}"
+run: compile ## Run PerfTest, pass exec arguments via ARGS, e.g. ARGS="-x 1 -y 1 -r 1"
+	@mvnw exec:java -Dexec.mainClass="com.rabbitmq.perf.PerfTest" -Dexec.args="$(ARGS)"
 
 signed-binary: clean ## Build a GPG signed binary
 	@mvnw package -P assemblies
 
-.PHONY: help run
+.PHONY: binary help clean compile jar run signed-binary