add Makefile for building releases

Signed-off-by: Jakub Sokołowski <jakub@status.im>

.gitignore

@@ -4,6 +4,7 @@
 *.dll
 *.so
 *.dylib
+/bin
 /sshfp-updater
 
 # Test binary, built with `go test -c`

Makefile

@@ -0,0 +1,47 @@
+VERSION =    $(shell cat VERSION)
+BUILD_DATE = $(shell date -u +"%Y-%m-%dT%H:%M:%SZ")
+GIT_HASH =   $(shell git rev-parse HEAD)
+
+PACKAGE = sshfp-updater
+BUILDS = linux-amd64 linux-386 linux-arm64 linux-mips64 windows-amd64.exe freebsd-amd64 darwin-amd64 darwin-arm64
+BINARIES = $(addprefix bin/$(PACKAGE)-$(VERSION)-, $(BUILDS))
+CHECKSUMS = bin/$(PACKAGE)-$(VERSION).sha256
+
+LDFLAGS=-ldflags "-X main.Version=$(VERSION) -X main.BuildDate=$(BUILD_DATE) -X main.GitHash=$(GIT_HASH)"
+
+$(PACKAGE): cmd/$(PACKAGE)
+	go build -v -o $@ ./$^
+
+release: $(BINARIES) checksums
+checksums: $(CHECKSUMS)
+
+bin:
+	mkdir $@
+
+bin/$(PACKAGE)-$(VERSION)-linux-%: bin
+	env GOOS=linux GOARCH=$* CGO_ENABLED=0 go build $(LDFLAGS) -o $@ ./cmd/$(PACKAGE)
+
+bin/$(PACKAGE)-$(VERSION)-darwin-%: bin
+	env GOOS=darwin GOARCH=$* CGO_ENABLED=0 go build $(LDFLAGS) -o $@ ./cmd/$(PACKAGE)
+
+bin/$(PACKAGE)-$(VERSION)-windows-%.exe: bin
+	env GOOS=windows GOARCH=$* CGO_ENABLED=0 go build $(LDFLAGS) -o $@ ./cmd/$(PACKAGE)
+
+bin/$(PACKAGE)-$(VERSION)-freebsd-%: bin
+	env GOOS=freebsd GOARCH=$* CGO_ENABLED=0 go build $(LDFLAGS) -o $@ ./cmd/$(PACKAGE)
+
+$(CHECKSUMS):
+	sha256sum $(BINARIES) > $@
+
+compile-analysis: cmd/$(PACKAGE)
+	go build -gcflags '-m' ./$^
+
+code-quality:
+	-go vet ./cmd/$(PACKAGE)
+	-gofmt -s -d ./cmd/$(PACKAGE)
+	-golint ./cmd/$(PACKAGE)
+	-gocyclo ./cmd/$(PACKAGE)
+	-ineffassign ./cmd/$(PACKAGE)
+
+test:
+	go test -v ./cmd/$(PACKAGE)

VERSION

@@ -0,0 +1 @@
+1.0.1