Implement 'update' command

Author: juho05

README.md

@@ -16,11 +16,21 @@ Create a new project:
 codegame new
 ```
 
+Update event definitions, wrappers and libraries to match the latest game version:
+```sh
+codegame update
+```
+
 Run a project:
 ```sh
 codegame run
 ```
 
+Build a project:
+```sh
+codegame build
+```
+
 Get information about a game server:
 ```sh
 codegame info <url>

commands/build.go

@@ -26,7 +26,7 @@ func Build() error {
 
 	switch data.Lang {
 	case "go":
-		err = modules.Execute("go", "latest", "client", args...)
+		err = modules.Execute("go", "latest", data.Type, args...)
 	default:
 		return cli.Error("'build' is not supported for '%s'", data.Lang)
 	}

commands/run.go

@@ -26,7 +26,7 @@ func Run() error {
 
 	switch data.Lang {
 	case "go":
-		err = modules.Execute("go", "latest", "client", args...)
+		err = modules.Execute("go", "latest", data.Type, args...)
 	default:
 		return cli.Error("'run' is not supported for '%s'", data.Lang)
 	}

commands/update.go

@@ -0,0 +1,84 @@
+package commands
+
+import (
+	"os"
+	"strings"
+
+	"github.com/Bananenpro/cli"
+	"github.com/code-game-project/codegame-cli/util/cgfile"
+	"github.com/code-game-project/codegame-cli/util/cggenevents"
+	"github.com/code-game-project/codegame-cli/util/external"
+	"github.com/code-game-project/codegame-cli/util/modules"
+)
+
+func Update() error {
+	root, err := cgfile.FindProjectRoot()
+	if err != nil {
+		return err
+	}
+
+	err = os.Chdir(root)
+	if err != nil {
+		return err
+	}
+
+	data, err := cgfile.LoadCodeGameFile("")
+	if err != nil {
+		return cli.Error("Failed to load .codegame.json")
+	}
+
+	switch data.Type {
+	case "client":
+		return updateClient(data)
+	case "server":
+		return updateServer(data)
+	default:
+		return cli.Error("Unknown project type: %s", data.Type)
+	}
+
+}
+
+func updateClient(config *cgfile.CodeGameFileData) error {
+	baseURL := baseURL(config.URL)
+
+	_, cgVersion, err := getCodeGameInfo(baseURL)
+	if err != nil {
+		return err
+	}
+
+	cgeVersion, err := cggenevents.GetCGEVersion(baseURL)
+	if err != nil {
+		return err
+	}
+
+	switch config.Lang {
+	case "go":
+		libraryVersion := external.LibraryVersionFromCGVersion("code-game-project", "go-client", cgVersion)
+		err = modules.Execute("go", libraryVersion, "client", "update", "--library-version="+libraryVersion)
+	default:
+		return cli.Error("'update' is not supported for '%s'", config.Lang)
+	}
+	if err != nil {
+		return err
+	}
+
+	eventsOutput := "."
+	if config.Lang == "go" {
+		eventsOutput = strings.ReplaceAll(strings.ReplaceAll(config.Game, "-", ""), "_", "")
+	}
+
+	if config.Lang == "go" || config.Lang == "ts" {
+		err = cggenevents.CGGenEvents(cgeVersion, eventsOutput, baseURL, config.Lang)
+	}
+
+	return err
+}
+
+func updateServer(config *cgfile.CodeGameFileData) error {
+	switch config.Lang {
+	case "go":
+		return modules.Execute("go", "latest", "server", "update")
+	default:
+		return cli.Error("'update' is not supported for '%s'", config.Lang)
+	}
+}

main.go

@@ -25,6 +25,7 @@ func main() {
 		fmt.Fprintln(os.Stderr, "The official CodeGame CLI.")
 		fmt.Fprintln(os.Stderr, "\nCommands:")
 		fmt.Fprintln(os.Stderr, "\tnew \tCreate a new project.")
+		fmt.Fprintln(os.Stderr, "\tupdate \tUpdate the current project.")
 		fmt.Fprintln(os.Stderr, "\trun \tRun the current project.")
 		fmt.Fprintln(os.Stderr, "\tbuild \tBuild the current project.")
 		fmt.Fprintln(os.Stderr, "\tinfo \tDisplay some info about a game server.")
@@ -47,6 +48,8 @@ func main() {
 	switch command {
 	case "new":
 		err = commands.New()
+	case "update":
+		err = commands.Update()
 	case "info":
 		err = commands.Info()
 	case "docs":