Add flag to stop a running server

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.2.0] - 2023-03-12
+
+### Added
+
+ - Enable stopping server using cli flag
+
 ## [0.1.1] - 2023-02-27
 
 ### Fixed
@@ -15,7 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 Initial version, providing a working proof-of-concept.
 
-[0.1.1]: https://github.com/cluttrdev/showdown/compare/v0.1.1...v0.1.0
+[0.2.0]: https://github.com/cluttrdev/showdown/compare/v0.1.1...v0.2.0
+[0.1.1]: https://github.com/cluttrdev/showdown/compare/v0.1.0...v0.1.1
 [0.1.0]: https://github.com/cluttrdev/showdown/releases/tag/v0.1.0
 
-

README.md

@@ -27,12 +27,6 @@ tar -zxf showdown_${RELEASE_TAG}_linux_x86_64.tar.gz showdown
 install ./showdown /usr/local/bin/showdown
 ```
 
-Alternatively, you can install it using the standard Go tools.
-
-```shell
-go install github.com/cluttrdev/showdown@latest
-```
-
 ## Usage
 
 To preview a Markdown formatted file `example.md` simply run

cmd/showdown/app.go

@@ -89,3 +89,9 @@ func (app *Application) render() ([]byte, error) {
 
 	return out, nil
 }
+
+func StopServer(port uint16) error {
+	url := fmt.Sprintf("http://127.0.0.1:%d/shutdown", port)
+	_, err := http.Get(url)
+	return err
+}

cmd/showdown/main.go

@@ -10,15 +10,27 @@ import (
 var cmd = &cobra.Command{
 	Use:   "showdown [file]",
 	Short: "Live markdown previewer",
-	Args:  cobra.ExactArgs(1),
+	Args:  cobra.MaximumNArgs(1),
 	RunE: func(cmd *cobra.Command, args []string) error {
-		file := args[0]
-
 		port, err := cmd.Flags().GetUint16("port")
 		if err != nil {
 			return err
 		}
 
+		stop, err := cmd.Flags().GetBool("stop")
+		if err != nil {
+			return err
+		}
+
+		if stop {
+			return StopServer(port)
+		}
+
+		if len(args) == 0 {
+			return fmt.Errorf("Missing file argument")
+		}
+		file := args[0]
+
 		app := NewApplication(file)
 		return app.run(port)
 	},
@@ -32,5 +44,6 @@ func main() {
 }
 
 func init() {
-	cmd.Flags().Uint16P("port", "p", 1337, "the port on which the server will listen")
+	cmd.Flags().Uint16P("port", "p", 1337, "the port the server listens on")
+	cmd.Flags().Bool("stop", false, "stop a running server")
 }