Add support for region selection

README.md

@@ -0,0 +1,39 @@
+# tdl
+
+This is the `tdl` CLI tool used for running the interactive trainings on the [Three Dots Labs Academy](https://academy.threedots.tech).
+
+## Install
+
+### Script (macOS, Linux)
+
+```sh
+sudo /bin/sh -c "$(curl -fsSL https://raw.githubusercontent.com/ThreeDotsLabs/cli/master/install.sh)" -- -b /usr/local/bin```
+```
+
+### Script (Windows)
+
+Install to your home directory:
+
+```sh
+iwr https://raw.githubusercontent.com/ThreeDotsLabs/cli/master/install.ps1 -useb | iex
+```
+
+Or install in any chosen path:
+
+```sh
+$env:TDL_INSTALL = 'bin\'
+iwr https://raw.githubusercontent.com/ThreeDotsLabs/cli/master/install.ps1 -useb | iex
+```
+
+### Binaries
+
+Download the latest binary from GitHub and move it to a directory in your `$PATH`.
+
+[See Releases](https://github.com/ThreeDotsLabs/cli/releases)
+
+### From source
+
+```sh
+go install github.com/ThreeDotsLabs/cli/tdl@latest
+```
+

internal/update.go

@@ -0,0 +1,42 @@
+package internal
+
+import (
+	"encoding/json"
+	"fmt"
+	"github.com/fatih/color"
+	"net/http"
+)
+
+type releaseResponse struct {
+	TagName string `json:"tag_name"`
+}
+
+const repoURL = "https://github.com/ThreeDotsLabs/cli"
+const releasesURL = "https://api.github.com/repos/ThreeDotsLabs/cli/releases/latest"
+
+func CheckForUpdate(currentVersion string) {
+	currentVersion = "v0.1.26"
+	if currentVersion == "" || currentVersion == "dev" {
+		return
+	}
+
+	resp, err := http.Get(releasesURL)
+	if err != nil {
+		return
+	}
+	defer func() {
+		_ = resp.Body.Close()
+	}()
+
+	var release releaseResponse
+	if err := json.NewDecoder(resp.Body).Decode(&release); err != nil {
+		return
+	}
+
+	if release.TagName != currentVersion {
+		c := color.New(color.FgHiYellow)
+		_, _ = c.Printf("A new version is available: %s (current: %s)\n", release.TagName, currentVersion)
+		_, _ = c.Printf("Visit %v to update\n", repoURL)
+		fmt.Println()
+	}
+}

tdl/main.go

@@ -50,7 +50,10 @@ var app = &cli.App{
 			return
 		}
 
-		fmt.Printf("%+v\n", err)
+		if err != nil {
+			fmt.Printf("%+v\n", err)
+		}
+
 		os.Exit(1)
 	},
 	Flags: []cli.Flag{
@@ -67,6 +70,9 @@ var app = &cli.App{
 		} else {
 			logrus.SetLevel(logrus.WarnLevel)
 		}
+
+		internal.CheckForUpdate(version)
+
 		return nil
 	},
 	Commands: []*cli.Command{

trainings/api/protobuf/server.proto

@@ -4,7 +4,7 @@ import "google/protobuf/empty.proto";
 option go_package = "github.com/ThreeDotsLabs/cli/tdl-cli/trainings/genproto";
 
 service Trainings {
-  rpc Init(InitRequest) returns (google.protobuf.Empty) {};
+  rpc Init(InitRequest) returns (InitResponse) {};
 
   rpc GetTrainings(google.protobuf.Empty) returns (GetTrainingsResponse) {};
   rpc StartTraining(StartTrainingRequest) returns (google.protobuf.Empty) {};
@@ -18,6 +18,10 @@ message InitRequest {
   string token = 1;
 }
 
+message InitResponse {
+  string region = 1;
+}
+
 message Training {
   string id = 1;
 }

trainings/configure.go

@@ -19,15 +19,20 @@ func (h *Handlers) ConfigureGlobally(ctx context.Context, token, serverAddr, reg
 		}
 	}
 
-	if _, err := h.newGrpcClientWithAddr(ctx, serverAddr, region, insecure).Init(
+	resp, err := h.newGrpcClientWithAddr(ctx, serverAddr, region, insecure).Init(
 		ctxWithRequestHeader(ctx, h.cliMetadata),
 		&genproto.InitRequest{
 			Token: token,
 		},
-	); err != nil {
+	)
+	if err != nil {
 		return err
 	}
 
+	if region == "" {
+		region = resp.Region
+	}
+
 	return h.config.WriteGlobalConfig(config.GlobalConfig{
 		Token:      token,
 		ServerAddr: serverAddr,