fix: go1.3 not os.WriteFile

Author: sword-jin

cmd/cover.go

@@ -43,8 +43,7 @@ goc cover --center=http://127.0.0.1:7777 --target=/path/to/target --mode=atomic
 }
 
 func runCover(target string) {
-	var buildFlags string
-	buildFlags = viper.GetString("buildflags")
+	buildFlags := viper.GetString("buildflags")
 	ci := &cover.CoverInfo{
 		Args:           buildFlags,
 		GoPath:         "",

cmd/cover_test.go

@@ -29,12 +29,26 @@ func TestCoverSuccess(t *testing.T) {
 	assert.NoError(t, err)
 	defer os.RemoveAll(workingDir)
 
-	os.WriteFile(workingDir+"/main.go", mainContent, 0644)
-	os.WriteFile(workingDir+"/go.mod", goModContent, 0644)
+	err = writeFile(workingDir+"/main.go", mainContent)
+	assert.NoError(t, err)
+	err = writeFile(workingDir+"/go.mod", goModContent)
+	assert.NoError(t, err)
 	os.Setenv("GO111MODULE", "on")
 
 	runCover(workingDir)
 
 	_, err = os.Lstat(workingDir + "/http_cover_apis_auto_generated.go")
 	assert.Equal(t, err, nil, "the generate file should be generated.")
 }
+
+func writeFile(name string, data []byte) error {
+	f, err := os.OpenFile(name, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+	if err != nil {
+		return err
+	}
+	_, err = f.Write(data)
+	if err1 := f.Close(); err1 != nil && err == nil {
+		err = err1
+	}
+	return err
+}

pkg/cover/instrument.go

@@ -131,13 +131,16 @@ func clearFileCover(counter []uint32) {
 }
 
 func registerHandlers() {
+	{{if .Singleton}}
+	ln, _, err := listen()
+	{{else}}
 	ln, host, err := listen()
+	{{end}}
 	if err != nil {
 		log.Fatalf("listen failed, err:%v", err)
 	}
-	profileAddr := "http://" + host
-	log.Printf("[goc] goc profile address: %s \n", profileAddr)
 	{{if not .Singleton}}
+	profileAddr := "http://" + host
 	if resp, err := registerSelf(profileAddr); err != nil {
 		log.Fatalf("register address %v failed, err: %v, response: %v", profileAddr, err, string(resp))
 	}