add ability to launch epoch client

README.md

@@ -17,7 +17,7 @@ For macOS, the [Kegworks Wineskin port](https://github.com/Kegworks-App/Kegworks
    1. Download the latest binary from the [releases](https://git.burkey.co/eburk/epochcli/releases) page 
    2. If you have the `go` toolchain installed, you can run `go install git.burkey.co/eburk/epochcli` to install to your `$GOROOT`
    3. Compile the source yourself
-3. Run `epochcli` once. This will create a config file at `$HOME/.config/epochcli/config.toml`. Change the `WowDir` variable to your Wow game directory
+3. Run `epochcli` once. This will create a config file at `$HOME/.config/epochcli/config.toml`. Update the variables with the appropriate information
 4. Run `epochcli` again. It will download the patch files from Epoch's servers to your Wow directory
 5. Use your launcher or tool of choice to startup Epoch in `wine`
 

config.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"fmt"
+	"github.com/BurntSushi/toml"
+	"os"
+	"path/filepath"
+)
+
+type Config struct {
+	WowDir    string
+	LaunchCmd string
+}
+
+const (
+	configDirName = "epochcli"
+	configName    = "config.toml"
+)
+
+var cfgPath string
+
+func setupConfig() (*Config, error) {
+	home := os.Getenv("HOME")
+	if home == "" {
+		return nil, fmt.Errorf("$HOME environment variable not set")
+	}
+
+	newConfig := Config{
+		WowDir:    defaultWowPath,
+		LaunchCmd: defaultLaunchCmd,
+	}
+
+	cfgPath = filepath.Join(home, ".config", configDirName, configName)
+
+	if _, statErr := os.Stat(cfgPath); os.IsNotExist(statErr) {
+		os.MkdirAll(filepath.Join(home, ".config", configDirName), 0755)
+
+		file, err := os.Create(cfgPath)
+		if err != nil {
+			return nil, err
+		}
+		defer file.Close()
+
+		encoder := toml.NewEncoder(file)
+		if err = encoder.Encode(newConfig); err != nil {
+			return nil, err
+		}
+
+		fmt.Printf("Created new config at %s, edit it before running the launcher again\n", cfgPath)
+		os.Exit(0)
+	}
+
+	_, err := toml.DecodeFile(cfgPath, &newConfig)
+	if err != nil {
+		return nil, err
+	}
+
+	return &newConfig, nil
+}

main.go

@@ -3,88 +3,74 @@ package main
 import (
 	"crypto/md5"
 	"encoding/hex"
+	"flag"
 	"fmt"
-	"github.com/BurntSushi/toml"
 	"io"
 	"log"
 	"net/http"
 	"os"
+	"os/exec"
 	"path/filepath"
+	"runtime"
 	"strings"
 )
 
 const (
 	manifestUrl      = "https://updater.project-epoch.net/api/manifest"
 	defaultWowPath   = "/path/to/wow"
-	configDirName  = "epochcli"
+	defaultLaunchCmd = "not configured"
-	configName     = "config.toml"
 )
 
-type Config struct {
+func main() {
-	WowDir string
+	var (
-}
+		helpFlag       bool
+		updateOnlyFlag bool
+	)
+	flag.BoolVar(&helpFlag, "h", false, "Print help")
+	flag.BoolVar(&updateOnlyFlag, "u", false, "Only update the client, do not launch")
+	flag.Parse()
 
-var (
+	if helpFlag {
-	config Config
+		flag.CommandLine.SetOutput(os.Stdout)
-)
+		flag.PrintDefaults()
-
-func setupConfig() error {
-	home := os.Getenv("HOME")
-	if home == "" {
-		return fmt.Errorf("$HOME environment variable not set")
-	}
-
-	cfgPath := filepath.Join(home, ".config", configDirName, configName)
-
-	if _, statErr := os.Stat(cfgPath); os.IsNotExist(statErr) {
-		os.MkdirAll(filepath.Join(home, ".config", configDirName), 0755)
-
-		newConfig := &Config{
-			WowDir: defaultWowPath,
-		}
-
-		file, err := os.Create(cfgPath)
-		if err != nil {
-			return err
-		}
-		defer file.Close()
-
-		encoder := toml.NewEncoder(file)
-		if err = encoder.Encode(newConfig); err != nil {
-			return err
-		}
-
-		fmt.Printf("Created new config at %s, edit it before running the launcher again\n", cfgPath)
 		os.Exit(0)
 	}
 
-	_, err := toml.DecodeFile(cfgPath, &config)
+	config, err := setupConfig()
-	if err != nil {
-		return err
-	}
-
-	if config.WowDir == defaultWowPath {
-		return fmt.Errorf("WowDir in %s is still the default setting", cfgPath)
-	}
-
-	return nil
-}
-
-func main() {
-	err := setupConfig()
 	if err != nil {
 		log.Fatal(err)
 	}
 
-	count, err := downloadUpdate()
+	if config.WowDir == defaultWowPath {
+		log.Fatalf("WowDir in %s is still the default setting, exiting", cfgPath)
+	}
+
+	if !updateOnlyFlag && config.LaunchCmd == defaultLaunchCmd {
+		log.Fatalf("LaunchCmd in %s is still the default setting, exiting\n", cfgPath)
+	}
+
+	count, err := downloadUpdate(config)
 	if err != nil {
 		log.Fatal(err)
 	}
 
 	fmt.Printf("Updated %d files\n", count)
+
+	if updateOnlyFlag {
+		os.Exit(0)
+	}
+
+	fmt.Printf("Starting Epoch....\n", count)
+
+	switch runtime.GOOS {
+	case "darwin":
+		exec.Command("open", config.LaunchCmd).Run()
+	case "linux":
+		exec.Command(config.LaunchCmd).Run()
+	}
 }
 
-func downloadUpdate() (int, error) {
+func downloadUpdate(config *Config) (int, error) {
 	var c int
 
 	manifest, err := getManifest()

release.sh

@@ -2,7 +2,7 @@
 
 set -e
 
-rm ./*.tar.gz
+rm -f ./*.tar.gz
 
 mkdir bin