Apply version embedding

Makefile

@@ -1,5 +1,16 @@
 NAME = fzwiki
 BIN := bin/$(NAME)
+
+# version e.g. v0.0.1
+VERSION := $(shell git describe --tags --abbrev=0 | tr -d "v")
+# commit hash of HEAD e.g. 3a913f
+REVISION := $(shell git rev-parse --short HEAD)
+
+LDFLAGS := -w \
+		   -s \
+		   -X "main.appVersion=$(VERSION)" \
+		   -X "main.appRevision=$(REVISION)"
+
 COVERAGE_OUT := .test/cover.out
 COVERAGE_HTML := .test/cover.html
 
@@ -9,11 +20,11 @@ fmt:
 
 .PHONY: lint
 lint:
-	staticcheck
+	staticcheck ./...
 
 .PHONY: build
 build:
-	go build -o $(BIN)
+	go build -ldflags "$(LDFLAGS)" -o $(BIN)
 
 .PHONY: test
 test:

main.go

@@ -20,8 +20,9 @@ import (
 
 type exitCode int
 
-const (
-	appVersion  = "0.0.9"
+var (
+	appVersion  = "unknown"
+	appRevision = "unknown"
 	appName     = "fzwiki"
 	envNameLang = "FZWIKI_LANG"
 )
@@ -59,7 +60,7 @@ func Main(args []string) exitCode {
 	}
 
 	if opts.Version {
-		fmt.Printf("%s: v%s\n", appName, appVersion)
+		fmt.Printf("%s: v%s-rev%s\n", appName, appVersion, appRevision)
 		return exitCodeOK
 	}