Add the initial rough skeleton for a config tool.

cmd/joyful-config/main.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"git.annabunches.net/annabunches/joyful/internal/configparser"
+	"git.annabunches.net/annabunches/joyful/internal/logger"
+	flag "github.com/spf13/pflag"
+)
+
+func getConfigDir(dir string) string {
+	configDir := strings.ReplaceAll(dir, "~", "${HOME}")
+	return os.ExpandEnv(configDir)
+}
+
+func main() {
+	var configDir string
+	flag.StringVarP(&configDir, "config", "c", "~/.config/joyful", "Directory to read configuration from.")
+	flag.Parse()
+	configDir = getConfigDir(configDir)
+
+	config, err := configparser.ParseConfig(configDir)
+	switch err.(type) {
+	case *configparser.EmptyConfigError:
+		config = &configparser.Config{}
+	default:
+		logger.FatalIfError(err, "Fatal error reading config")
+	}
+
+	fmt.Printf("Config: %v\n", config)
+}

internal/configparser/configparser.go

@@ -50,7 +50,7 @@ func getConfigFilePaths(directory string) ([]string, error) {
 		if err != nil {
 			return nil, errors.New("failed to create config directory at " + directory)
 		} else {
-			return nil, errors.New("no config files found at " + directory)
+			return nil, &EmptyConfigError{directory}
 		}
 	}
 
@@ -63,5 +63,9 @@ func getConfigFilePaths(directory string) ([]string, error) {
 		paths = append(paths, filepath.Join(directory, file.Name()))
 	}
 
+	if len(paths) == 0 {
+		return nil, &EmptyConfigError{directory}
+	}
+
 	return paths, nil
 }

internal/configparser/errors.go

@@ -0,0 +1,11 @@
+package configparser
+
+import "fmt"
+
+type EmptyConfigError struct {
+	directory string
+}
+
+func (e *EmptyConfigError) Error() string {
+	return fmt.Sprintf("no config files found at %s", e.directory)
+}