fix: searches golang engine environment for port.

engine/golang/processes.go

@@ -2,22 +2,25 @@ package golang
 
 import (
 	"strconv"
+	"strings"
 
 	"gatehill.io/imposter/engine/procutil"
 )
 
 var matcher = procutil.ProcessMatcher{
 	ProcessName:    "imposter-go",
 	CommandPattern: "imposter-go$",
-	GetPort: func(cmdline []string) int {
+	GetPort: func(cmdline []string, env []string) int {
 		// Check environment variables
-		for _, arg := range cmdline {
-			if portStr := procutil.ReadArg([]string{arg}, "IMPOSTER_PORT", ""); portStr != "" {
-				if port, err := strconv.Atoi(portStr); err == nil {
-					return port
-				}
+		for _, e := range env {
+			if !strings.HasPrefix(e, "IMPOSTER_PORT=") {
+				continue
+			}
+			portRaw := strings.TrimPrefix(e, "IMPOSTER_PORT=")
+			if port, err := strconv.Atoi(portRaw); err == nil {
+				return port
 			}
 		}
-		return 0
+		return 8080
 	},
 }

engine/jvm/processes.go

@@ -3,14 +3,13 @@ package jvm
 import (
 	"strconv"
 
-	"gatehill.io/imposter/engine"
 	"gatehill.io/imposter/engine/procutil"
 )
 
 var matcher = procutil.ProcessMatcher{
 	ProcessName:    "java",
 	CommandPattern: "([/\\\\]imposter.*\\.jar$|^io.gatehill.imposter.cmd.ImposterLauncher$)",
-	GetPort: func(cmdline []string) int {
+	GetPort: func(cmdline []string, env []string) int {
 		portRaw := procutil.ReadArg(cmdline, "listenPort", "l")
 		if portRaw != "" {
 			if port, err := strconv.Atoi(portRaw); err == nil {
@@ -20,7 +19,7 @@ var matcher = procutil.ProcessMatcher{
 		if isTlsEnabled(cmdline) {
 			return 8443
 		}
-		return 0
+		return 8080
 	},
 }
 
@@ -33,7 +32,3 @@ func isTlsEnabled(cmdline []string) bool {
 	}
 	return false
 }
-
-func findImposterJvmProcesses() ([]engine.ManagedMock, error) {
-	return procutil.FindImposterProcesses(matcher)
-}

engine/procutil/processes.go

@@ -21,7 +21,7 @@ type ProcessMatcher struct {
 	// CommandPattern is a regex pattern to match against command line arguments
 	CommandPattern string
 	// GetPort is a function that determines the port from command line arguments
-	GetPort func([]string) int
+	GetPort func(cmdline []string, env []string) int
 }
 
 // FindImposterProcesses finds all imposter processes matching the given matcher
@@ -44,12 +44,15 @@ func FindImposterProcesses(matcher ProcessMatcher) ([]engine.ManagedMock, error)
 		if !isImposterProc(cmdline, procName, matcher) {
 			continue
 		}
-		logger.Tracef("found %s Imposter process %d: %v", matcher.ProcessName, p.Pid, cmdline)
 
-		port := matcher.GetPort(cmdline)
-		if port == 0 {
-			port = 8080 // default port
+		env, err := p.Environ()
+		if err != nil {
+			logger.Warnf("error reading environment variables for process %d: %v", p.Pid, err)
+			env = []string{}
 		}
+		logger.Tracef("found %s Imposter process %d: %v, env: %v", matcher.ProcessName, p.Pid, cmdline, env)
+
+		port := matcher.GetPort(cmdline, env)
 
 		mock := engine.ManagedMock{
 			ID:   fmt.Sprintf("%d", p.Pid),