fix: add Makefile for test/lint

.gitignore

@@ -8,3 +8,7 @@ dist
 .vscode/*.json
 default.etcd
 */**/*.bolt
+
+# Output file of unit test coverage
+coverage.out
+coverage.out.tmp

.golangci.yml

@@ -0,0 +1,27 @@
+run:
+  deadline: 5m
+  skip-dirs:
+    - test
+    - examples
+
+linter-settings:
+  goconst:
+    min-len: 2
+    min-occurrences: 2
+
+linters:
+  enable:
+    - revive
+    - goconst
+    - gofmt
+    - goimports
+    - misspell
+    - unparam
+
+issues:
+  exclude-use-default: false
+  exclude-rules:
+    - path: _test.go
+      linters:
+        - errcheck
+        - revive

Makefile

@@ -0,0 +1,74 @@
+# The old school Makefile, following are required targets. The Makefile is written
+# to allow building multiple binaries. You are free to add more targets or change
+# existing implementations, as long as the semantics are preserved.
+#
+#   make              - default to 'build' target
+#   make lint         - code analysis
+#   make test         - run unit test (or plus integration test)
+#   make clean        - clean up targets
+#
+#
+# The makefile is also responsible to populate project version information.
+#
+
+#
+# Tweak the variables based on your project.
+#
+
+
+#
+# These variables should not need tweaking.
+#
+
+# It's necessary to set this because some environments don't link sh -> bash.
+export SHELL := /bin/bash
+
+# It's necessary to set the errexit flags for the bash shell.
+export SHELLOPTS := errexit
+
+# Project output directory.
+OUTPUT_DIR := ./bin
+
+# Current version of the project.
+VERSION      ?= $(shell git describe --tags --always --dirty)
+BRANCH       ?= $(shell git branch | grep \* | cut -d ' ' -f2)
+GITCOMMIT    ?= $(shell git rev-parse HEAD)
+GITTREESTATE ?= $(if $(shell git status --porcelain),dirty,clean)
+BUILDDATE    ?= $(shell date -u +"%Y-%m-%dT%H:%M:%SZ")
+appVersion   ?= $(VERSION)
+
+
+# Track code version with Docker Label.
+DOCKER_LABELS ?= git-describe="$(shell date -u +v%Y%m%d)-$(shell git describe --tags --always --dirty)"
+
+# Golang standard bin directory.
+GOPATH ?= $(shell go env GOPATH)
+BIN_DIR := $(GOPATH)/bin
+GOLANGCI_LINT := $(BIN_DIR)/golangci-lint
+
+# Default golang flags used in build and test
+# -count: run each test and benchmark 1 times. Set this flag to disable test cache
+export GOFLAGS ?= -count=1
+
+#
+# Define all targets. At least the following commands are required:
+#
+
+# All targets.
+.PHONY: lint test
+
+# more info about `GOGC` env: https://github.com/golangci/golangci-lint#memory-usage-of-golangci-lint
+lint: $(GOLANGCI_LINT) $(HELM_LINT)
+	@$(GOLANGCI_LINT) run
+
+$(GOLANGCI_LINT):
+	curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(BIN_DIR) v1.41.0
+
+test:
+	@go test -v -race -gcflags=-l -coverpkg=./... -coverprofile=coverage.out.tmp ./...
+	@go tool cover -func coverage.out | tail -n 1 | awk '{ print "Total coverage: " $$3 }'
+
+.PHONY: clean
+clean:
+	@-rm -vrf ${OUTPUT_DIR} output coverage.out coverage.out.tmp
+