Add command to find a free port

cmd/hoster_cli/commands/freePort.go

@@ -0,0 +1,40 @@
+package commands
+
+import (
+	"fmt"
+	"slices"
+
+	"gitea.codeblob.work/pk/hoster/internals/conf"
+	"gitea.codeblob.work/pk/hoster/internals/helpers"
+	"github.com/urfave/cli/v2"
+)
+
+func CmdCheckPort(c *cli.Context) error {
+	sitesAvail := conf.App.MustString("nginx.sitesAvailable")
+	existingProjects, err := helpers.FindHostConfigs(sitesAvail)
+	if err != nil {
+		return err
+	}
+
+	usedPorts := []int{}
+	for _, project := range existingProjects {
+		usedPorts = append(usedPorts, project.InternalPort)
+	}
+
+	port := conf.App.Int("nginx.portRangeStart")
+	freePort := 0
+	for port <= conf.App.Int("nginx.portRangeEnd") {
+		if !slices.Contains(usedPorts, port) && helpers.IsFreePort(port) {
+			freePort = port
+			break
+		}
+		port++
+	}
+
+	if freePort == 0 {
+		return fmt.Errorf("no free port available")
+	}
+
+	fmt.Printf("Free port: %d\n", freePort)
+	return nil
+}

cmd/hoster_cli/hoster.go

@@ -16,7 +16,7 @@ func Execute() {
 	app := &cli.App{
 		Name:    "hoster",
 		Usage:   "Hoster",
-		Version: "1.1.0",
+		Version: "1.2.0",
 		Commands: []*cli.Command{
 			{
 				Name:  "new",
@@ -56,6 +56,20 @@ func Execute() {
 					},
 				},
 			},
+			{
+				Name: "port",
+				Subcommands: []*cli.Command{
+					{
+						Name:  "free",
+						Usage: "Get the next free port in the configured range",
+						Before: func(c *cli.Context) error {
+							conf.LoadConfig(filepath.Join(findHomeDir(), ".hoster.yml"))
+							return nil
+						},
+						Action: commands.CmdCheckPort,
+					},
+				},
+			},
 			{
 				Name:   "check",
 				Usage:  "Check if newer versions of docker images are available",