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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages bash)
  #:use-module (guix licenses)
  #:use-module (gnu packages ncurses)
  #:use-module (gnu packages readline)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix utils)
  #:use-module (guix build-system gnu))

(define-public bash
  (let* ((cppflags (string-join '("-DSYS_BASHRC='\"/etc/bashrc\"'"
                                  "-DSYS_BASH_LOGOUT='\"/etc/bash_logout\"'"
                                  "-DDEFAULT_PATH_VALUE='\"/no-such-path\"'"
                                  "-DSTANDARD_UTILS_PATH='\"/no-such-path\"'"
                                  "-DNON_INTERACTIVE_LOGIN_SHELLS"
                                  "-DSSH_SOURCE_BASHRC")
                                " "))
         (configure-flags
          ``("--with-installed-readline"
             ,,(string-append "CPPFLAGS=" cppflags)
             ,(string-append
               "LDFLAGS=-Wl,-rpath -Wl,"
               (assoc-ref %build-inputs "readline")
               "/lib"
               " -Wl,-rpath -Wl,"
               (assoc-ref %build-inputs "ncurses")
               "/lib")))
         (post-install-phase
          '(lambda* (#:key outputs #:allow-other-keys)
             ;; Add a `bash' -> `sh' link.
             (let ((out (assoc-ref outputs "out")))
               (with-directory-excursion (string-append out "/bin")
                 (symlink "bash" "sh"))))))
    (package
     (name "bash")
     (version "4.2")
     (source (origin
              (method url-fetch)
              (uri (string-append
                    "mirror://gnu/bash/bash-" version ".tar.gz"))
              (sha256
               (base32
                "1n5kbblp5ykbz5q8aq88lsif2z0gnvddg9babk33024wxiwi2ym2"))))
     (build-system gnu-build-system)
     (inputs `(("readline" ,readline)
               ("ncurses" ,ncurses)))             ; TODO: add texinfo
     (arguments
      `(;; When cross-compiling, `configure' incorrectly guesses that job
        ;; control is missing.
        #:configure-flags ,(if (%current-target-system)
                               `(cons* "bash_cv_job_control_missing=no"
                                       ,configure-flags)
                               configure-flags)

        ;; Bash is reportedly not parallel-safe.  See, for instance,
        ;; <http://patches.openembedded.org/patch/32745/> and
        ;; <http://git.buildroot.net/buildroot/commit/?h=79e2d802ae7e376a413c02097790493e1f65c3a4>.
        #:parallel-build? #f
        #:parallel-tests? #f

        ;; XXX: The tests have a lot of hard-coded paths, so disable them
        ;; for now.
        #:tests? #f

        #:phases (alist-cons-after 'install 'post-install
                                   ,post-install-phase
                                   %standard-phases)))
     (synopsis "The GNU Bourne-Again SHell")
     (description
      "Bash is the shell, or command-line interpreter, of the GNU system.  It
is compatible with the Bourne Shell, but it also integrates useful features
from the Korn Shell and the C Shell and new improvements of its own.  It
allows command-line editing, unlimited command history, shell functions and
aliases, and job control while still allowing most sh scripts to be run
without modification.")
     (license gpl3+)
     (home-page "http://www.gnu.org/software/bash/"))))

(define-public bash-light
  ;; A stripped-down Bash for non-interactive use.
  (package (inherit bash)
    (name "bash-light")
    (inputs '())                                ; no readline, no curses
    (arguments
     (let ((args `(#:modules ((guix build gnu-build-system)
                              (guix build utils)
                              (srfi srfi-1)
                              (srfi srfi-26))
                   ,@(package-arguments bash))))
       (substitute-keyword-arguments args
         ((#:configure-flags flags)
          `(list "--without-bash-malloc"
                 "--disable-readline"
                 "--disable-history"
                 "--disable-help-builtin"
                 "--disable-progcomp"
                 "--disable-net-redirections"
                 "--disable-nls"

                 ,@(if (%current-target-system)
                       '("bash_cv_job_control_missing=no")
                       '()))))))))