homedir: fallback to user.Current().homeDir if XDG_DATA_HOME/XDG_CONFIG_HOME and HOME are unset

Signed-off-by: Jan Garcia <github-public@n-garcia.com>

pkg/homedir/homedir_linux.go

@@ -64,13 +64,14 @@ func stick(f string) error {
 
 // GetDataHome returns XDG_DATA_HOME.
 // GetDataHome returns $HOME/.local/share and nil error if XDG_DATA_HOME is not set.
+// If HOME and XDG_DATA_HOME are not set, getpwent(3) is consulted to determine the users home directory.
 //
 // See also https://standards.freedesktop.org/basedir-spec/latest/ar01s03.html
 func GetDataHome() (string, error) {
 	if xdgDataHome := os.Getenv("XDG_DATA_HOME"); xdgDataHome != "" {
 		return xdgDataHome, nil
 	}
-	home := os.Getenv("HOME")
+	home := Get()
 	if home == "" {
 		return "", errors.New("could not get either XDG_DATA_HOME or HOME")
 	}
@@ -79,13 +80,14 @@ func GetDataHome() (string, error) {
 
 // GetConfigHome returns XDG_CONFIG_HOME.
 // GetConfigHome returns $HOME/.config and nil error if XDG_CONFIG_HOME is not set.
+// If HOME and XDG_CONFIG_HOME are not set, getpwent(3) is consulted to determine the users home directory.
 //
 // See also https://standards.freedesktop.org/basedir-spec/latest/ar01s03.html
 func GetConfigHome() (string, error) {
 	if xdgConfigHome := os.Getenv("XDG_CONFIG_HOME"); xdgConfigHome != "" {
 		return xdgConfigHome, nil
 	}
-	home := os.Getenv("HOME")
+	home := Get()
 	if home == "" {
 		return "", errors.New("could not get either XDG_CONFIG_HOME or HOME")
 	}
@@ -93,8 +95,9 @@ func GetConfigHome() (string, error) {
 }
 
 // GetLibHome returns $HOME/.local/lib
+// If HOME is not set, getpwent(3) is consulted to determine the users home directory.
 func GetLibHome() (string, error) {
-	home := os.Getenv("HOME")
+	home := Get()
 	if home == "" {
 		return "", errors.New("could not get HOME")
 	}