feat(cli): Add root and serve commands

Author: mertssmnoglu

cmd/root.go

@@ -0,0 +1,27 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+var rootCmd = &cobra.Command{
+	Use:   "openapi-cli",
+	Short: "A CLI for OpenAPI operations",
+	Long:  `A Command Line Interface (CLI) tool for serving, validating, and linting OpenAPI specifications.`,
+}
+
+func init() {
+	rootCmd.AddCommand(serveCmd)
+}
+
+func Execute() {
+	err := rootCmd.Execute()
+
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}

cmd/serve.go

@@ -0,0 +1,52 @@
+package cmd
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+
+	"github.com/flowchartsman/swaggerui"
+	"github.com/spf13/cobra"
+)
+
+var serveCmd = &cobra.Command{
+	Use:   "serve",
+	Short: "Serve the OpenAPI file",
+	Long:  `Starts a server to serve the OpenAPI file.`,
+	Run:   CommandServe,
+}
+
+func init() {
+	serveCmd.Flags().String("file", "./openapi.json", "The OpenAPI file to serve")
+}
+
+func ReadOpenAPIFile(filePath string) ([]byte, error) {
+	// Read the OpenAPI file
+	// OpenAPI Specification files are in JSON or YAML format
+	data, err := os.ReadFile(filePath)
+
+	if err != nil {
+		fmt.Println("Error reading file:", err)
+
+		return nil, err
+	}
+
+	return data, nil
+}
+
+func CommandServe(cmd *cobra.Command, args []string) {
+	filePath, err := cmd.Flags().GetString("file")
+
+	if err != nil {
+		fmt.Println("Error reading file flag:", err)
+		return
+	}
+
+	content, err := ReadOpenAPIFile(filePath)
+	fmt.Println(string(content))
+
+	http.Handle("/openapi/", http.StripPrefix("/openapi", swaggerui.Handler(content)))
+	log.Println("serving on :8080")
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}

main.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	"github.com/mertssmnoglu/openapi-cli/cmd"
+)
+
+func main() {
+	cmd.Execute()
+}