main: add -v command line flag

Only log accesses when -v is given.

main.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"context"
+	"flag"
+	"log"
 	"net"
 	"net/http"
 	"os"
@@ -12,6 +14,10 @@ import (
 )
 
 func main() {
+	var verbose bool
+	flag.BoolVar(&verbose, "v", false, "Print access log")
+	flag.Parse()
+
 	err := os.Remove("/run/weldr/api.socket")
 	if err != nil && !os.IsNotExist(err) {
 		panic(err)
@@ -33,7 +39,12 @@ func main() {
 		panic(err)
 	}
 
-	api := weldr.New(repo, packages)
+	var logger *log.Logger
+	if verbose {
+		logger = log.New(os.Stdout, "", 0)
+	}
+
+	api := weldr.New(repo, packages, logger)
 	server := http.Server{Handler: api}
 
 	shutdownDone := make(chan struct{}, 1)

weldr/api.go

@@ -18,14 +18,16 @@ type API struct {
 	repo     rpmmd.RepoConfig
 	packages rpmmd.PackageList
 
+	logger *log.Logger
 	router *httprouter.Router
 }
 
-func New(repo rpmmd.RepoConfig, packages rpmmd.PackageList) *API {
+func New(repo rpmmd.RepoConfig, packages rpmmd.PackageList, logger *log.Logger) *API {
 	api := &API{
 		store:    newStore(),
 		repo:     repo,
 		packages: packages,
+		logger:   logger,
 	}
 
 	// sample blueprint
@@ -68,7 +70,10 @@ func New(repo rpmmd.RepoConfig, packages rpmmd.PackageList) *API {
 }
 
 func (api *API) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
-	log.Println(request.URL.Path)
+	if api.logger != nil {
+		log.Println(request.Method, request.URL.Path)
+	}
+
 	writer.Header().Set("Content-Type", "application/json; charset=utf-8")
 	api.router.ServeHTTP(writer, request)
 }