1 files changed, 81 insertions, 0 deletions
diff --git a/Makefile b/Makefile
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+## Parameters ##################################################################
+SRC_DIR ?= ${CURDIR}/src/
+BIN_DIR ?= ${CURDIR}/bin/
+LIB_DIR ?= ${CURDIR}/lib/
+
+TARGET ?= hastabel.jar
+INSTALL_DIR ?= .
+
+#### Where to get the missing Jar files.
+JAR_SOURCE ?= "https://noot-noot.org/tabellion/jar/"
+
+#### Binaries
+###### JAR binary
+JAR ?= jar
+
+###### JRE binary
+JAVA ?= java
+
+###### JDK binary
+JAVAC ?= javac
+
+###### ANTLR
+ANTLR_JAR ?= $(LIB_DIR)/antlr-4.7-complete.jar
+
+##### Downloader
+DOWNLOADER ?= wget
+
+## Parameters Sanity Check #####################################################
+ifeq ($(strip $(JAVA)),)
+$(error No Java executable defined as parameter.)
+endif
+
+ifeq ($(strip $(JAVAC)),)
+$(error No Java compiler defined as parameter.)
+endif
+
+ifeq ($(strip $(ANTLR_JAR)),)
+$(error No ANTLR_JAR defined as parameter.)
+endif
+
+## Java Config #################################################################
+CLASSPATH = "$(SRC_DIR):$(BIN_DIR):$(ANTLR_JAR)"
+
+## Makefile Magic ##############################################################
+ANTLR_SOURCES = $(wildcard $(SRC_DIR)/hastabel/*.g4)
+JAVA_SOURCES = \
+	$(filter-out $(ANTLR_SOURCES:.g4=.java), \
+		$(wildcard $(SRC_DIR)/hastabel/*.java) \
+	)\
+	$(ANTLR_SOURCES:.g4=.java)
+CLASSES = $(patsubst $(SRC_DIR)/%,$(BIN_DIR)/%, $(JAVA_SOURCES:.java=.class))
+
+## Makefile Rules ##############################################################
+$(TARGET): $(ANTLR_JAR) $(JAVA_SOURCES) $(CLASSES)
+	rm -f $(TARGET) $(INSTALL_DIR)/$@
+	$(JAR) cf $@ -C $(BIN_DIR) .
+	cp $@ $(INSTALL_DIR)/$@
+
+clean:
+	rm -f $(filter-out $(ANTLR_SOURCES),$(wildcard $(ANTLR_SOURCES:.g4=*)))
+	rm -rf $(BIN_DIR)/*
+	rm -f $(TARGET)
+
+$(SRC_DIR)/hastabel/LangParser.java: $(ANTLR_SOURCES)
+
+# Pattern rules can be used to generate multiple target in a single action.
+LangLexer%java LangParser%java: $(ANTLR_SOURCES)
+	$(JAVA) -jar $(ANTLR_JAR) -lib $(SRC_DIR)/hastabel/ $^
+
+$(CLASSES): $(BIN_DIR)/%.class: $(SRC_DIR)/%.java $(BIN_DIR)
+	$(JAVAC) -cp $(CLASSPATH) -d $(BIN_DIR) $<
+
+%.jar: $(LIB_DIR)
+	echo "Attempting to download missing jar '$@'..."
+	cd $(LIB_DIR); $(DOWNLOADER) "$(JAR_SOURCE)/$(notdir $@)"
+
+$(LIB_DIR):
+	mkdir -p $@
+
+$(BIN_DIR):
+	mkdir -p $@