gnu: fish: Update to 3.0.0.

* gnu/packages/shells.scm (fish): Update to 3.0.0.
  [source]: Remove dead URL.
  [inputs]: Remove bc.  Replace python-wrapper with python.
  [arguments]: Remove configure-flags.  Enable fish to source
  /etc/fish/config.fish.  Enable completions, functions and configurations
  in user's and system's guix profiles.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/shells.scm

@@ -9,6 +9,7 @@
 ;;; Copyright © 2017, 2018 Nils Gillmann <ng0@n0.is>
 ;;; Copyright © 2017, 2018 Leo Famulari <leo@famulari.name>
 ;;; Copyright © 2017 Arun Isaac <arunisaac@systemreboot.net>
+;;; Copyright © 2019 Meiyo Peng <meiyo.peng@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -27,7 +28,6 @@
 
 (define-module (gnu packages shells)
   #:use-module (gnu packages)
-  #:use-module (gnu packages algebra)
   #:use-module (gnu packages autotools)
   #:use-module (gnu packages base)
   #:use-module (gnu packages bison)
@@ -89,51 +89,85 @@ direct descendant of NetBSD's Almquist Shell (@command{ash}).")
 (define-public fish
   (package
     (name "fish")
-    (version "2.7.1")
+    (version "3.0.0")
-    (source (origin
+    (source
+     (origin
        (method url-fetch)
-              (uri
+       (uri (string-append "https://github.com/fish-shell/fish-shell/"
-               (list
-                (string-append "https://fishshell.com/files/"
-                               version "/fish-" version ".tar.gz")
-                (string-append "https://github.com/fish-shell/fish-shell/"
                            "releases/download/" version "/"
-                               name "-" version ".tar.gz")))
+                           name "-" version ".tar.gz"))
        (sha256
-               (base32
+        (base32 "1kzjd0n0sfslkd36lzrvvvgy3qwkd9y466bkrqlnhd5h9dhx77ga"))))
-                "0nhc3yc5lnnan7zmxqqxm07rdpwjww5ijy45ll2njdc6fnfb2az4"))
-              (modules '((guix build utils)))
-              ;; Don't try to install /etc/fish/config.fish.
-              (snippet '(begin
-                          (substitute* "Makefile.in"
-                            ((".*INSTALL.*sysconfdir.*fish.*") ""))
-                          #t))))
     (build-system gnu-build-system)
+    (inputs
+     `(("groff" ,groff)                 ; for 'fish --help'
+       ("ncurses" ,ncurses)
+       ("pcre2" ,pcre2)      ; don't use the bundled PCRE2
+       ("python" ,python)))  ; for fish_config and manpage completions
     (native-inputs
      `(("doxygen" ,doxygen)))
-    (inputs
-     `(("bc" ,bc)
-       ("ncurses" ,ncurses)
-       ("groff" ,groff)               ;for 'fish --help'
-       ("pcre2" ,pcre2)               ;don't use the bundled PCRE2
-       ("python" ,python-wrapper)))   ;for fish_config and manpage completions
     (arguments
      '(#:tests? #f                      ; no check target
-       #:configure-flags '("--sysconfdir=/etc")
        #:phases
        (modify-phases %standard-phases
-         ;; Embed absolute paths to store items.
+         (add-after 'unpack 'patch-source
-         (add-after 'unpack 'embed-store-paths
+           (lambda _
-           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (substitute* '("build_tools/build_commands_hdr.sh"
-             (substitute* '("share/functions/math.fish"
+                            "build_tools/build_user_doc.sh")
-                            "share/functions/seq.fish")
+               (("/usr/bin/env") "env"))
-               (("\\| bc")
+             #t))
-                (string-append "| " (assoc-ref %build-inputs "bc")
+         ;; Embed absolute paths.
-                               "/bin/bc")))
+         (add-before 'install 'embed-absolute-paths
-             (substitute* "share/functions/fish_update_completions.fish"
+           (lambda _
-               (("python") (which "python")))
+             (substitute* '("share/functions/__fish_config_interactive.fish"
+                            "share/functions/fish_config.fish"
+                            "share/functions/fish_update_completions.fish")
+               (("python3") (which "python3")))
              (substitute* "share/functions/__fish_print_help.fish"
                (("nroff") (which "nroff")))
+             #t))
+         ;; Source /etc/fish/config.fish from $__fish_sysconf_dir/config.fish.
+         (add-before 'install 'patch-fish-config
+           (lambda _
+             (let ((port (open-file "etc/config.fish" "a")))
+               (display (string-append
+                         "\n\n"
+                         "# Patched by Guix.\n"
+                         "# Source /etc/fish/config.fish.\n"
+                         "if test -f /etc/fish/config.fish\n"
+                         "    source /etc/fish/config.fish\n"
+                         "end\n")
+                        port)
+               (close-port port))
+             #t))
+         ;; Enable completions, functions and configurations in user's and
+         ;; system's guix profiles by adding them to __extra_* variables.
+         (add-before 'install 'patch-fish-extra-paths
+           (lambda _
+             (let ((port (open-file "share/__fish_build_paths.fish" "a")))
+               (display
+                (string-append
+                 "\n\n"
+                 "# Patched by Guix.\n"
+                 "# Enable completions, functions and configurations in user's"
+                 " and system's guix profiles by adding them to __extra_*"
+                 " variables.\n"
+                 "set -l __guix_profile_paths ~/.guix-profile"
+                 " /run/current-system/profile\n"
+                 "set __extra_completionsdir"
+                 " $__guix_profile_paths\"/etc/fish/completions\""
+                 " $__guix_profile_paths\"/share/fish/vendor_completions.d\""
+                 " $__extra_completionsdir\n"
+                 "set __extra_functionsdir"
+                 " $__guix_profile_paths\"/etc/fish/functions\""
+                 " $__guix_profile_paths\"/share/fish/vendor_functions.d\""
+                 " $__extra_functionsdir\n"
+                 "set __extra_confdir"
+                 " $__guix_profile_paths\"/etc/fish/conf.d\""
+                 " $__guix_profile_paths\"/share/fish/vendor_conf.d\""
+                 " $__extra_confdir\n")
+                port)
+               (close-port port))
              #t)))))
     (synopsis "The friendly interactive shell")
     (description