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;;; Commentary:
;;; https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
;;; Code:
(define-module (xdg basedir)
:export (runtime-dir
data-home config-home cache-home
data-dirs config-dirs))
;;; XDG_DATA_HOME
;;; $HOME/.local/share
(define (data-home)
(or (getenv "XDG_DATA_HOME")
(string-append (getenv "HOME") "/.local/share")))
;;; XDG_CONFIG_HOME
;;; $HOME/.config
(define (config-home)
(or (getenv "XDG_CONFIG_HOME")
(string-append (getenv "HOME") "/.config")))
;;; XDG_DATA_DIRS
;;; colon (:) sepparated, in addition to XDG_DATA_HOME
;;; /usr/local/share/:/usr/share/
(define (data-dirs)
(let ((str (getenv "XDG_DATA_DIRS")))
(if str
(parse-path str)
'("/usr/local/share" "/usr/share"))))
;;; XDG_CONFIG_DIRS
;;; colon (:) separated, in adddition to XDG_CONFIG_HOME
;;; /etc/xdg
(define (config-dirs)
(let ((str (getenv "XDG_CONFIG_DIRS")))
(if str
(string-split str #\:)
(list (string-append sysconfdir "/xdg")))))
;;; XDG_CACHE_HOME
;;; $HOME/.cache
(define (cache-home)
(or (getenv "XDG_CACHE_HOME")
(string-append (getenv "HOME") "/.cache")))
;;; XDG_RUNTIME_DIR
;;; Default to /tmp or /tmp/$(uid), and raise a warning
(define (runtime-dir)
(or (getenv "XDG_RUNTIME_DIR")
(begin
(display "WARNING: XDG_RUNTIME_DIR unset, defaulting to /tmp\n"
(current-error-port))
"/tmp")))
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