initial commit

jasonmf · Jun 9, 2019 · 91a4cdf · 91a4cdf
commit 91a4cdf
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diff --git a/cmd/Makefile b/cmd/Makefile
@@ -0,0 +1,12 @@
+VERSION := $(shell git tag | grep ^v | sort -V | tail -n 1)
+LDFLAGS = -ldflags "-X versserv/cmd.Version=${VERSION}"
+TIMESTAMP := $(shell date +%Y%m%d-%H%M)
+DEVLDFLAGS = -ldflags "-X versserv/cmd.Version=dev-${TIMESTAMP}"
+
+SERVBIN=/tmp/versserv
+
+dev-serv: server/*
+	go build ${DEVLDFLAGS} -o ${SERVBIN} server/*.go
+
+serv: server/*
+	go build ${LDFLAGS} -o ${SERVBIN} server/*.go
diff --git a/cmd/server/server.go b/cmd/server/server.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"flag"
+
+	"versserv"
+	"versserv/cmd"
+)
+
+func main() {
+	flag.Parse()
+	if *cmd.FVersion {
+		cmd.ShowVersion()
+	}
+
+	s, err := versserv.NewServer()
+	if err != nil {
+		panic("creating server: " + err.Error())
+	}
+
+	if err := s.ListenAndServe(); err != nil {
+		panic("listening: " + err.Error())
+	}
+}
diff --git a/cmd/version.go b/cmd/version.go
@@ -0,0 +1,18 @@
+package cmd
+
+import (
+	"flag"
+	"fmt"
+	"os"
+)
+
+var (
+	Version = "" // set at compile time with -ldflags "-X versserv/cmd.Version=x.y.yz"
+
+	FVersion = flag.Bool("version", false, "show version and exit")
+)
+
+func ShowVersion() {
+	fmt.Println("version:", Version)
+	os.Exit(0)
+}
diff --git a/server.go b/server.go
@@ -0,0 +1,31 @@
+package versserv
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+
+	"versserv/cmd"
+)
+
+type Server struct {
+	// server components
+}
+
+func NewServer() (*Server, error) {
+	// make your own Server, Mux
+	s := &Server{}
+	http.HandleFunc("/", s.root)
+	return s, nil
+}
+
+func (s *Server) ListenAndServe() error {
+	log.Print("starting server version ", cmd.Version)
+	return http.ListenAndServe("localhost:8000", nil)
+}
+
+func (s *Server) root(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("X-Version", cmd.Version)
+	w.Header().Set("Content-Type", "text/html")
+	fmt.Fprintln(w, "<html><body><h1>Hello World!</h1></body></html>")
+}