(define-module (gnu packages entr)
  #:use-module (guix licenses)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix utils)
  #:use-module (guix build-system gnu)
  #:use-module (gnu packages less))

(define-public entr
  (package
    (name "entr")
    (version "3.5")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "http://entrproject.org/code/entr-"
                           version ".tar.gz"))
       (sha256
        (base32
         "05k4jyjna0pr2dalwc1l1dhrcyk6pw7hbss7jl4ykwfadcs5br73"))))
    (build-system gnu-build-system)
    (arguments
     `(#:test-target "test"
                     #:phases
                     (modify-phases %standard-phases
                       (replace 'configure
                         (lambda* (#:key outputs #:allow-other-keys)
                           (let ((out (assoc-ref outputs "out")))
                             (setenv "CONFIG_SHELL" (which "bash"))
                             (setenv "CC" (which "gcc"))
                             (setenv "DESTDIR" (string-append out "/"))
                             (setenv "PREFIX" "")
                             (setenv "MANPREFIX" "man")
                             (system* "./configure")))))))
    (home-page "http://entrproject.org/")
    (synopsis "Run arbitrary commands when files change")
    (description
     "entr is a zero-configuration tool with no external build or
runtime dependencies.  The interface to entr is not only minimal, it
aims to be simple enough to create a new category of ad hoc
automation.  These micro-tests reduce keystrokes, but more importantly
they emphasize the utility of automated checks.")
    (license isc)))