Makefile for cross compilation (iter8-tools#1110)

* fixing makefile

Signed-off-by: Srinivasan Parthasarathy <spartha@us.ibm.com>

* fixing makefile further

Signed-off-by: Srinivasan Parthasarathy <spartha@us.ibm.com>

* staticcheck separate

Signed-off-by: Srinivasan Parthasarathy <spartha@us.ibm.com>

Author: sriumcp

.github/workflows/tests.yaml

@@ -54,7 +54,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v2
 
-    - run: make build
+    - run: make install
 
     - name: run Iter8 experiment and assert
       run: |

.gitignore

@@ -128,6 +128,8 @@ site
 Chart.lock
 
 # Iter8 binary and yamls and reports
+bin/
+_dist/
 iter8
 clibase/clibase
 result.yaml

Makefile

@@ -1,33 +1,128 @@
+BINDIR      := $(CURDIR)/bin
+INSTALL_PATH ?= /usr/local/bin
+DIST_DIRS   := find * -type d -exec
+TARGETS     := darwin/amd64 darwin/arm64 linux/amd64 linux/386 linux/arm linux/arm64 linux/ppc64le linux/s390x windows/amd64
+
+BINNAME     ?= iter8
+ITER8_IMG ?= iter8/iter8:latest
+
+GOBIN         = $(shell go env GOBIN)
+ifeq ($(GOBIN),)
+GOBIN         = $(shell go env GOPATH)/bin
+endif
+GOX           = $(GOBIN)/gox
+
+# go options
+TAGS       :=
+LDFLAGS    := -w -s
+GOFLAGS    :=
+
+# Rebuild the binary if any of these files change
+SRC := $(shell find . -type f -name '*.go' -print) go.mod go.sum
+
+# Required for globs to work correctly
+SHELL      = /usr/bin/env bash
+
+GIT_TAG    = $(shell git describe --tags --abbrev=0 --exact-match 2>/dev/null)
+
+ifdef VERSION
+	BINARY_VERSION = $(VERSION)
+endif
+BINARY_VERSION ?= ${GIT_TAG}
+
+# Only set Version if building a tag or VERSION is set
+ifneq ($(BINARY_VERSION),)
+	LDFLAGS += -X github.com/iter8-tools/iter8/basecli/RootCmd.Version=${BINARY_VERSION}
+endif
+
+LDFLAGS += $(EXT_LDFLAGS)
+
+.PHONY: all
+all: build
+
+# ------------------------------------------------------------------------------
+#  build
+
+.PHONY: build
+build: $(BINDIR)/$(BINNAME)
+
+$(BINDIR)/$(BINNAME): $(SRC)
+	GO111MODULE=on go build $(GOFLAGS) -trimpath -tags '$(TAGS)' -ldflags '$(LDFLAGS)' -o '$(BINDIR)'/$(BINNAME) ./
+
+.PHONY: cmddocs
+cmddocs:
+	go run cmd/docs/main.go	
+
+# ------------------------------------------------------------------------------
+#  install
+
+.PHONY: install
+install: build
+	@install "$(BINDIR)/$(BINNAME)" "$(INSTALL_PATH)/$(BINNAME)"
+
+# ------------------------------------------------------------------------------
+#  dependencies
+
+# If go get is run from inside the project directory it will add the dependencies
+# to the go.mod file. To avoid that we change to a directory without a go.mod file
+# when downloading the following dependencies
+
+$(GOX):
+	(cd /; GO111MODULE=on go get -u github.com/mitchellh/gox)
+
+# ------------------------------------------------------------------------------
+#  release
+
+.PHONY: build-cross
+build-cross: LDFLAGS += -extldflags "-static"
+build-cross: $(GOX)
+	GOFLAGS="-trimpath" GO111MODULE=on CGO_ENABLED=0 $(GOX) -parallel=3 -output="_dist/{{.OS}}-{{.Arch}}/$(BINNAME)" -osarch='$(TARGETS)' $(GOFLAGS) -tags '$(TAGS)' -ldflags '$(LDFLAGS)' ./
+
+.PHONY: dist
+dist: build-cross
+	( \
+		cd _dist && \
+		$(DIST_DIRS) cp ../LICENSE {} \; && \
+		$(DIST_DIRS) cp ../README.md {} \; && \
+		$(DIST_DIRS) tar -zcf iter8-${VERSION}-{}.tar.gz {} \; && \
+		$(DIST_DIRS) zip -r iter8-${VERSION}-{}.zip {} \; \
+	)
+
+.PHONY: clean
+clean:
+	@rm -rf '$(BINDIR)' ./_dist
+
+.PHONY: docker-build
+docker-build:
+	docker build -f Dockerfile -t $(ITER8_IMG) .
+
+.PHONY: docker-push
+docker-push:
+	docker push $(ITER8_IMG)
+
+# ------------------------------------------------------------------------------
+#  test
+
+.PHONY: fmt
 fmt: ## Run go fmt against code.
 	go fmt ./...
 
+.PHONY: vet
 vet: ## Run go vet against code
 	go vet ./...
 
+.PHONY: staticcheck
 staticcheck:
 	staticcheck ./...
 
+.PHONY: test
 test: fmt vet ## Run tests.
 	go test ./... -race -coverprofile=coverage.out -covermode=atomic	
 
+.PHONY: coverage
 coverage: test
 	@echo "test coverage: $(shell go tool cover -func coverage.out | grep total | awk '{print substr($$3, 1, length($$3)-1)}')"
 
-htmlcov:
+.PHONY: htmlcov
+htmlcov: coverage
 	go tool cover -html=coverage.out
-
-cmddocs:
-	go run cmd/docs/main.go
-	
-# complete path to iter8 binary
-ITER8_BIN ?= /usr/local/bin/iter8
-build:
-	go build -o $(ITER8_BIN) main.go
-
-
-ITER8_IMG ?= iter8/iter8:latest
-docker-build:
-	docker build -f Dockerfile -t $(ITER8_IMG) .
-
-docker-push:
-	docker push $(ITER8_IMG)