Enhance go port recognition (#181)

* Add udi image case for mocked values of devfile types

Signed-off-by: thepetk <thepetk@gmail.com>

* Add Go ports detection for project without framework

Signed-off-by: thepetk <thepetk@gmail.com>

* Add tests for raw go project port recognition

Signed-off-by: thepetk <thepetk@gmail.com>

* Remove unnecessary comments on test project

Signed-off-by: thepetk <thepetk@gmail.com>

---------

Signed-off-by: thepetk <thepetk@gmail.com>

go/pkg/apis/enricher/framework/go/go_detector.go

@@ -11,6 +11,8 @@
 package enricher
 
 import (
+	"context"
+	"os"
 	"regexp"
 	"strings"
 
@@ -28,6 +30,44 @@ func hasFramework(modules []*modfile.Require, tag string) bool {
 	return false
 }
 
+func DoGoPortsDetection(component *model.Component, ctx *context.Context) {
+	files, err := utils.GetCachedFilePathsFromRoot(component.Path, ctx)
+	if err != nil {
+		return
+	}
+
+	matchRegexRules := model.PortMatchRules{
+		MatchIndexRegexes: []model.PortMatchRule{
+			{
+				Regex:     regexp.MustCompile(`.ListenAndServe\([^,)]*`),
+				ToReplace: ".ListenAndServe(",
+			},
+			{
+				Regex:     regexp.MustCompile(`.Start\([^,)]*`),
+				ToReplace: ".Start(",
+			},
+		},
+		MatchRegexes: []model.PortMatchSubRule{
+			{
+				Regex:    regexp.MustCompile(`Addr:\s+"([^",]+)`),
+				SubRegex: regexp.MustCompile(`:*(\d+)$`),
+			},
+		},
+	}
+
+	for _, file := range files {
+		bytes, err := os.ReadFile(file)
+		if err != nil {
+			continue
+		}
+		ports := GetPortFromFileGo(matchRegexRules, string(bytes))
+		if len(ports) > 0 {
+			component.Ports = ports
+			return
+		}
+	}
+}
+
 func GetPortFromFileGo(rules model.PortMatchRules, text string) []int {
 	ports := []int{}
 	for _, matchIndexRegex := range rules.MatchIndexRegexes {

go/pkg/apis/enricher/go_enricher.go

@@ -85,6 +85,9 @@ func (j GoEnricher) DoEnrichComponent(component *model.Component, settings model
 						}
 					}
 				}
+				if len(component.Ports) == 0 {
+					framework.DoGoPortsDetection(component, ctx)
+				}
 			}
 		}
 		if len(ports) > 0 {

go/test/apis/component_recognizer_test.go

@@ -284,6 +284,10 @@ func TestPortDetectionGoGin(t *testing.T) {
 	testPortDetectionInProject(t, "projectGin", []int{8789})
 }
 
+func TestPortDetectionGo(t *testing.T) {
+	testPortDetectionInProject(t, "projectGo", []int{8080})
+}
+
 func TestPortDetectionGoFiber(t *testing.T) {
 	testPortDetectionInProject(t, "projectGoFiber", []int{3000})
 }

resources/projectPortTesting/projectGo/go.mod

@@ -0,0 +1,3 @@
+module github.com/burrsutter/go-net-http-hello
+
+go 1.19

resources/projectPortTesting/projectGo/main.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+)
+
+func main() {
+	http.HandleFunc("/", HelloHandler)
+	fmt.Println("Listening on localhost:8080")
+	http.ListenAndServe(":8080", nil)
+}
+
+func HelloHandler(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusOK)
+	hostname, err := os.Hostname()
+	if err != nil {
+		fmt.Println("unable to get hostname")
+	}
+	fmt.Fprintf(w, "Go Hello on %s\n", hostname)
+}