Changes cache path

Changed cache from XDG_CONFIG_HOME to XDG_CACHE_HOME

Fixes #66

internal/app/app.go

@@ -520,9 +520,9 @@ func (a *App) Update(definitions, all bool, nocache bool, which ...string) error
 		return err
 	}
 
-	a.saveCache()
+	err = a.saveCache()
 
-	return nil
+	return err
 }
 
 func (a *App) updateGithub() error {
@@ -1035,7 +1035,7 @@ func (a *App) getDistributionsFromLock() ([]string, []string) {
 }
 
 func (a *App) loadCache() {
-	conf, err := getConfigDir()
+	conf, err := getCacheDir()
 	if err != nil {
 		return
 	}
@@ -1058,28 +1058,35 @@ func (a *App) loadCache() {
 	}
 }
 
-func (a *App) saveCache() {
-	conf, err := getConfigDir()
+func (a *App) saveCache() error {
+	cache, err := getCacheDir()
 	if err != nil {
-		return
+		return nil
 	}
 
-	conf = filepath.Join(conf, "/cache.json")
+	err = os.MkdirAll(cache, 0750)
+	if err != nil {
+		return fmt.Errorf("unable to create cache directory '%s': %w", cache, err)
+	}
+
+	cache = filepath.Join(cache, "/cache.json")
 
 	js, err := json.Marshal(&a.cache)
 	if err != nil {
-		a.logger.Error().Err(err).Msgf("unable to marshal cache %q", conf)
-		return
+		a.logger.Error().Err(err).Msgf("unable to marshal cache %q", cache)
+		return nil
 	}
 
-	fd, err := os.OpenFile(conf, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0640)
+	fd, err := os.OpenFile(cache, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0640)
 	if err != nil {
-		a.logger.Error().Err(err).Msgf("unable to write cache %s: please check file permissions", conf)
-		return
+		a.logger.Error().Err(err).Msgf("unable to write cache %s: please check file permissions", cache)
+		return nil
 	}
 	defer fd.Close()
 
 	fd.Write(js)
+
+	return nil
 }
 
 func (a *App) createInstallers() {

internal/app/utils.go

@@ -33,6 +33,21 @@ func getConfigDir() (string, error) {
 	return dir, nil
 }
 
+func getCacheDir() (string, error) {
+	var err error
+
+	dir := os.Getenv("XDG_CACHE_HOME")
+	if dir == "" {
+		dir, err = homedir.Dir()
+		if err != nil {
+			return "", err
+		}
+		dir += "/.cache/binenv"
+	}
+
+	return dir, nil
+}
+
 func getDistributionsFilePath() (string, error) {
 	conf, err := getConfigDir()
 	if err != nil {