Import Cloudflare Makefile

.gitignore

 /es-git-go
+/.GOPATH
+/bin

.gitlab-ci.yml

 .test: &test
   stage: test
   script:
-    - mkdir -p $GOPATH/src/gitlab.com/gitlab-org
-    - ln -s `pwd` $GOPATH/src/gitlab.com/gitlab-org/es-git-go
-    - make verify es-git-go
+    - make setup
+    - make format
+    - make test
+    - make cover
 test 1.5:
   <<: *test

Makefile

-#!/usr/bin/make -f
-GO_SRC := $(shell find . -iname '*.go')
-GO_PKGS := $(shell go list ./... | grep -v vendor)
-
-GO15VENDOREXPERIMENT := 1
+# The import path is where your repository can be found.
+# To import subpackages, always prepend the full import path.
+# If you change this, run `make clean`. Read more: https://git.io/vM7zV
+IMPORT_PATH := gitlab.com/gitlab-org/es-git-go
 CGO_ENABLED := 0
-es-git-go: ${GO_SRC} Makefile
-	go build
-fmt:
-	go fmt ${GO_PKGS}
-test:
-	go test -cover -v ${GO_PKGS}
-verify: fmt test
+GO15VENDOREXPERIMENT := 1
+
+# V := 1 # When V is set, print commands and build progress.
+
+# Space separated patterns of packages to skip in list, test, format.
+IGNORED_PACKAGES := /vendor/
+
+.PHONY: all
+all: build
+
+.PHONY: build
+build: .GOPATH/.ok
+	$Q go install $(if $V,-v) $(VERSION_FLAGS) $(IMPORT_PATH)
+
+### Code not in the repository root? Another binary? Add to the path like this.
+# .PHONY: otherbin
+# otherbin: .GOPATH/.ok
+# 	$Q go install $(if $V,-v) $(VERSION_FLAGS) $(IMPORT_PATH)/cmd/otherbin
+
+##### ^^^^^^ EDIT ABOVE ^^^^^^ #####
+
+##### =====> Utility targets <===== #####
+
+.PHONY: clean test list cover format
+
+clean:
+	$Q rm -rf bin .GOPATH
+
+test: .GOPATH/.ok
+	$Q go test $(if $V,-v) -i -race $(allpackages) # install -race libs to speed up next run
+ifndef CI
+	$Q go vet $(allpackages)
+	$Q GODEBUG=cgocheck=2 go test -race $(allpackages)
+else
+	$Q ( go vet $(allpackages); echo $$? ) | \
+	    tee .GOPATH/test/vet.txt | sed '$$ d'; exit $$(tail -1 .GOPATH/test/vet.txt)
+	$Q ( GODEBUG=cgocheck=2 go test -v -race $(allpackages); echo $$? ) | \
+	    tee .GOPATH/test/output.txt | sed '$$ d'; exit $$(tail -1 .GOPATH/test/output.txt)
+endif
+
+list: .GOPATH/.ok
+	@echo $(allpackages)
+
+cover: bin/gocovmerge .GOPATH/.ok
+	@echo "NOTE: make cover does not exit 1 on failure, don't use it to check for tests success!"
+	$Q rm -f .GOPATH/cover/*.out .GOPATH/cover/all.merged
+	$(if $V,@echo "-- go test -coverpkg=./... -coverprofile=.GOPATH/cover/... ./...")
+	@for MOD in $(allpackages); do \
+		go test -coverpkg=`echo $(allpackages)|tr " " ","` \
+			-coverprofile=.GOPATH/cover/unit-`echo $$MOD|tr "/" "_"`.out \
+			$$MOD 2>&1 | grep -v "no packages being tested depend on"; \
+	done
+	$Q ./bin/gocovmerge .GOPATH/cover/*.out > .GOPATH/cover/all.merged
+ifndef CI
+	$Q go tool cover -html .GOPATH/cover/all.merged
+else
+	$Q go tool cover -html .GOPATH/cover/all.merged -o .GOPATH/cover/all.html
+endif
+	@echo ""
+	@echo "=====> Total test coverage: <====="
+	@echo ""
+	$Q go tool cover -func .GOPATH/cover/all.merged
+
+format: bin/goimports .GOPATH/.ok
+	$Q find .GOPATH/src/$(IMPORT_PATH)/ -iname \*.go | grep -v \
+	    -e "^$$" $(addprefix -e ,$(IGNORED_PACKAGES)) | xargs ./bin/goimports -w
+
+##### =====> Internals <===== #####
+
+.PHONY: setup
+setup: clean .GOPATH/.ok
+	@if ! grep "/.GOPATH" .gitignore > /dev/null 2>&1; then \
+	    echo "/.GOPATH" >> .gitignore; \
+	    echo "/bin" >> .gitignore; \
+	fi
+	go get -u github.com/FiloSottile/gvt
+	- ./bin/gvt fetch golang.org/x/tools/cmd/goimports
+	- ./bin/gvt fetch github.com/wadey/gocovmerge
+
+VERSION          := $(shell git describe --tags --always --dirty="-dev")
+DATE             := $(shell date -u '+%Y-%m-%d-%H%M UTC')
+VERSION_FLAGS    := -ldflags='-X "main.Version=$(VERSION)" -X "main.BuildTime=$(DATE)"'
+
+# cd into the GOPATH to workaround ./... not following symlinks
+_allpackages = $(shell ( cd $(CURDIR)/.GOPATH/src/$(IMPORT_PATH) && \
+    GOPATH=$(CURDIR)/.GOPATH go list ./... 2>&1 1>&3 | \
+    grep -v -e "^$$" $(addprefix -e ,$(IGNORED_PACKAGES)) 1>&2 ) 3>&1 | \
+    grep -v -e "^$$" $(addprefix -e ,$(IGNORED_PACKAGES)))
+
+# memoize allpackages, so that it's executed only once and only if used
+allpackages = $(if $(__allpackages),,$(eval __allpackages := $$(_allpackages)))$(__allpackages)
+
+export GOPATH := $(CURDIR)/.GOPATH
+unexport GOBIN
+Q := $(if $V,,@)
+.GOPATH/.ok:
+	$Q mkdir -p "$(dir .GOPATH/src/$(IMPORT_PATH))"
+	$Q ln -s ../../../.. ".GOPATH/src/$(IMPORT_PATH)"
+	$Q mkdir -p .GOPATH/test .GOPATH/cover
+	$Q mkdir -p bin
+	$Q ln -s ../bin .GOPATH/bin
+	$Q touch $@
+.PHONY: bin/gocovmerge bin/goimports
+bin/gocovmerge: .GOPATH/.ok
+	@test -d ./vendor/github.com/wadey/gocovmerge || \
+	    { echo "Vendored gocovmerge not found, try running 'make setup'..."; exit 1; }
+	$Q go install $(IMPORT_PATH)/vendor/github.com/wadey/gocovmerge
+bin/goimports: .GOPATH/.ok
+	@test -d ./vendor/golang.org/x/tools/cmd/goimports || \
+	    { echo "Vendored goimports not found, try running 'make setup'..."; exit 1; }
+	$Q go install $(IMPORT_PATH)/vendor/golang.org/x/tools/cmd/goimports
+# Based on https://github.com/cloudflare/hellogopher - v1.1 - MIT License
+#
+# Copyright (c) 2017 Cloudflare
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.