Tidy up CLI layer code

main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"os"
+	"strings"
 )
 
 type Command struct {
@@ -103,6 +104,35 @@ var commands = []Command{
 			return "cleaned", nil
 		},
 	},
+
+	{
+		Name:        "list",
+		Description: "List all known game associations by name followed by data path in a newline-separated list",
+		Arguments:   []string{},
+		IsVarargs:   false,
+
+		Action: func(requiredArguments []string, arguments []string) (string, error) {
+			if len(arguments) != 0 {
+				return "", fmt.Errorf("expected zero arguments")
+			}
+
+			var gameDataPaths, loadError = LoadGames()
+
+			if loadError != nil {
+				return "", loadError
+			}
+
+			var stringBuilder = strings.Builder{}
+
+			for game, dataPath := range gameDataPaths {
+				if _, printError := fmt.Printf("%s %s\n", game, dataPath); printError != nil {
+					return "", printError
+				}
+			}
+
+			return stringBuilder.String(), nil
+		},
+	},
 }
 
 func main() {

manager.go

@@ -117,10 +117,6 @@ func CreateGame(gameName string, gameDataPath string) error {
 	}
 
 	if iniFile, openError := os.Open(gamesIniPath); openError == nil {
-		if (openError != nil) && !(os.IsNotExist(openError)) {
-			return openError
-		}
-
 		defer func() {
 			if closeError := iniFile.Close(); closeError != nil {
 				panic(closeError)
@@ -321,6 +317,36 @@ func DeployGameMods(gameName string, modArchivePaths []string) error {
 	return nil
 }
 
+func LoadGames() (map[string]string, error) {
+	var gameDataPaths = make(map[string]string)
+
+	if iniFile, openError := os.Open(gamesIniPath); openError == nil {
+		defer func() {
+			if closeError := iniFile.Close(); closeError != nil {
+				panic(closeError)
+			}
+		}()
+
+		var parser = ini.NewParser(iniFile)
+
+		for entry := parser.Parse(); !(parser.IsEnd()); entry = parser.Parse() {
+			var section = parser.Section()
+
+			if entry.Key == "path" {
+				gameDataPaths[section] = entry.Value
+			}
+		}
+
+		if parseError := parser.Err(); parseError != nil {
+			return gameDataPaths, parseError
+		}
+	} else if !(os.IsNotExist(openError)) {
+		return gameDataPaths, openError
+	}
+
+	return gameDataPaths, nil
+}
+
 func RemoveGame(gameName string) error {
 	if cleanError := CleanGameMods(gameName); cleanError != nil {
 		return cleanError