;;; guix.scm -- Guix package definition

(use-modules
  (guix packages)
  ((guix git-download) #:select (git-version))
  ((guix build utils) #:select (find-files))
  ((guix gexp) #:select (local-file))
  ((gnu packages) #:select (specification->package))
  ((ice-9 popen) #:select (open-pipe))
  ((ice-9 rdelim) #:select (read-string))
  ((srfi srfi-1) #:select (any)))

(define %source-dir (dirname (dirname (current-filename))))

(define %git-commit
  (read-string (open-pipe "git show HEAD | head -1 | cut -d ' ' -f 2" OPEN_READ)))

(define (keep-file? file stat)
  (not (any (lambda (my-string)
              (string-contains file my-string))
            (list ".git" ".dir-locals.el" "build-aux"))))

(define (build-from-git base)
  (package
    (inherit base)
    (version (git-version (package-version base) "HEAD" %git-commit))
    (source (local-file %source-dir
                        #:recursive? #t
                        #:select? keep-file?))
    (native-inputs
     `(("autoconf" ,(specification->package "autoconf"))
       ("automake" ,(specification->package "automake"))
       ("gettext" ,(specification->package "gettext"))
       ("help2man" ,(specification->package "help2man"))
       ("texinfo" ,(specification->package "texinfo"))
       ,@(package-native-inputs base)))
    (arguments
     `(#:configure-flags '("--localstatedir=/var")
       #:make-flags (list "GUILE_AUTO_COMPILE=0")
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'make-po-directory-writable
           (lambda _
             (for-each make-file-writable
               (find-files "po" "."))
               #t)))))))

(list (build-from-git (specification->package "shepherd"))
      (build-from-git (specification->package "guile2.2-shepherd"))
      ;; This version FTBFS due to an import of '(ice-9 threads)' in modules/shepherd.scm
      ;(build-from-git (specification->package "guile2.0-shepherd"))
      )