Adds makefile

.gitignore

@@ -0,0 +1 @@
+/release/

Makefile

@@ -0,0 +1,29 @@
+BIN=mpo2img
+
+HEAD=$(shell git describe --tags 2> /dev/null  || git rev-parse --short HEAD)
+
+all: build
+
+build: darwin64 linux64 windows64
+
+clean:
+	-rm -f $(BIN)
+	-rm -rf release
+
+darwin64:
+	env GOOS=darwin GOARCH=amd64 go clean -i ./cmd/$(BIN)
+	env GOOS=darwin GOARCH=amd64 go build -o release/darwin64/$(BIN) ./cmd/$(BIN)
+
+linux64:
+	env GOOS=linux GOARCH=amd64 go clean -i ./cmd/$(BIN)
+	env GOOS=linux GOARCH=amd64 go build -o release/linux64/$(BIN) ./cmd/$(BIN)
+
+windows64:
+	env GOOS=windows GOARCH=amd64 go clean -i ./cmd/$(BIN)
+	env GOOS=windows GOARCH=amd64 go build -o release/windows64/$(BIN).exe ./cmd/$(BIN)
+
+.PHONY: release
+release: clean build
+	zip -9 release/$(BIN).darwin_amd64.$(HEAD).zip release/darwin64/$(BIN)
+	zip -9 release/$(BIN).linux_amd64.$(HEAD).zip release/linux64/$(BIN)
+	zip -9 release/$(BIN).windows_amd64.$(HEAD).zip release/windows64/$(BIN).exe