feat: add support for xdg directories

source/xdg.zsh

@@ -0,0 +1,28 @@
+#
+# xdg base directory variables
+#
+
+# https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
+
+if [ -z "${XDG_CONFIG_HOME}" ]; then
+  export XDG_CONFIG_HOME="${HOME}/.config"
+fi
+
+if [ -z "${XDG_CACHE_HOME}" ]; then
+  export XDG_CACHE_HOME="${HOME}/.cache"
+fi
+
+if [ -z "${XDG_DATA_HOME}" ]; then
+  export XDG_DATA_HOME="${HOME}/.local/share"
+fi
+
+if [ -z "${XDG_STATE_HOME}" ]; then
+  export XDG_STATE_HOME="${HOME}/.local/state"
+fi
+
+# XDG_RUNTIME_DIR is set when using pam_systemd
+if [[ "$OSTYPE" == "darwin"* ]]; then
+  export XDG_RUNTIME_DIR=/tmp
+fi
+
+# vim: ft=zsh expandtab tabstop=2 shiftwidth=2