(define-module (jd utils)
  #:export (jd-search-patches))

;; This code is copied and modified from (gnu packages) module. 

(define (make-custom-load-path dir-path)
  (make-parameter
   (map (lambda (directory)
	  (let ((custom-dir (string-append directory dir-path)))
            (if (and (file-exists? custom-dir)
		     (file-is-directory? custom-dir))
		custom-dir
		directory)))
        %load-path)))

(define (make-custom-searcher load-path)
  (lambda (file-name)
    (or (search-path (load-path) file-name)
	(raise (string-append file-name
			      ": not found")))))

(define %jd-patch-path (make-custom-load-path "/jd/packages/patches"))
(define %jd-dot-files-path (make-custom-load-path "/jd/home/services/dotfiles"))

(define (jd-search-patch file-name)
  "Search the patch FILE-NAME.  Raise an error if not found."
  (or (search-path (%jd-patch-path) file-name)
      (raise (string-append file-name
			    ": patch not found"))))

(define-syntax-rule (jd-search-patches file-name ...)
  "Return the list of absolute file names corresponding to each
FILE-NAME found in %JD-PATCH-PATH."
  (list (jd-search-patch file-name) ...))