feat(build): generate checksum for binaries

.travis.yml

@@ -28,6 +28,7 @@ deploy:
         - build/linux-arm-gitlab-ci-helper
         - build/linux-arm64-gitlab-ci-helper
         - build/alpine-amd64-gitlab-ci-helper
+        - build/checksums.txt
     skip_cleanup: true
     overwrite: true
     on:

Makefile

@@ -2,9 +2,17 @@
 .DEFAULT_GOAL := default
 
 
-SHA1=$(shell git rev-parse HEAD)
-GO_PKG = ./,./commands,./integrations/flowdock,./integrations/hipchat
+SHA1     = $(shell git rev-parse HEAD)
+GO_PKG   = ./,./commands,./integrations/flowdock,./integrations/hipchat
 GO_FILES = $(shell find $(GO_PROJECTS_PATHS) -maxdepth 1 -type f -name "*.go")
+OS       = $(shell uname)
+
+# COLORS
+RED    = $(shell printf "\33[31m")
+GREEN  = $(shell printf "\33[32m")
+WHITE  = $(shell printf "\33[37m")
+YELLOW = $(shell printf "\33[33m")
+RESET  = $(shell printf "\33[0m")
 
 help: ## prints help
 	@cat $(MAKEFILE_LIST) | grep -e "^[a-zA-Z_\-]*: *.*## *" | awk 'BEGIN {FS = ":.*?## "}; {printf " > \033[36m%-20s\033[0m %s\n", $$1, $$2}'
@@ -43,6 +51,35 @@ build: ## build binaries
 		docker run --rm -v $(shell pwd):/usr/src/myapp -v $(GOPATH):/usr/src/myapp/vendor -w /usr/src/myapp -e "GOPATH=/usr/src/myapp/vendor:/go" -e GOOS=linux -e GOARCH=amd64 golang:1.9-alpine go build -ldflags "-X main.RefLog=$(SHA1) -s -w" -o build/alpine-amd64-gitlab-ci-helper cli/main.go
     endif
 
+build_checksums: ## generate checksums for binaries
+	@echo "${YELLOW}Generating CLI build checksums${RESET}"
+	@rm -f build/checksums.txt
+
+    # for OSX users where you have md5 instead of md5sum
+    ifeq (${OS}, Darwin)
+        # md5 output has the following format:
+        #
+        # MD5 (darwin-386-gitlab-ci-helper) = 8eb317789e5d08e1c800cc469c20325a
+        #
+        # that's why sed and awk are used to cleanup
+		@cd build && ls . | grep gitlab-ci-helper \
+            | xargs md5 \
+            | awk '{ printf("%s\n%s\n\n", $$2, $$4) }' \
+            | sed 's/[()]//g' \
+            >> checksums.txt
+    else
+        # md5sum output has the following format:
+        #
+        # 8eb317789e5d08e1c800cc469c20325a darwin-386-gitlab-ci-helper
+        #
+        # that's why awk is used to cleanup
+		@cd build && ls . | grep gitlab-ci-helper \
+            | xargs md5sum \
+            | awk '{ printf("%s\n%s\n\n", $$2, $$1) }' \
+            >> checksums.txt
+    endif
+	@echo "${GREEN}✔ successfully generated CLI build checksums to ${WHITE}build/checksums.txt${RESET}\n"
+
 coverage-backend: ## run coverage tests
 	mkdir -p build/coverage
 	rm -rf build/coverage/*.cov