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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013 Cyril Roelandt <tipecaml@gmail.com>
+;;;
+;;; 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 tcsh)
+  #:use-module (guix licenses)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages autotools)
+  #:use-module (gnu packages base)
+  #:use-module (gnu packages ncurses))
+
+(define-public tcsh
+  (package
+    (name "tcsh")
+    (version "6.18.01")
+    (source (origin
+             (method url-fetch)
+             (uri (string-append "ftp://ftp.astron.com/pub/tcsh/tcsh-"
+                                 version ".tar.gz"))
+             (sha256
+              (base32 "1a4z9kwgx1iqqzvv64si34m60gj34p7lp6rrcrb59s7ka5wa476q"))))
+    (build-system gnu-build-system)
+    (inputs
+     `(("autoconf" ,autoconf)
+       ("coreutils" ,coreutils)
+       ("ncurses" ,ncurses)
+       ("patch/skip-tests"
+        ,(search-patch "tcsh-fix-autotest.patch"))))
+    (arguments
+     `(#:phases
+       (alist-replace
+        'check
+        (lambda* (#:key inputs #:allow-other-keys #:rest args)
+          (let ((check (assoc-ref %standard-phases 'check)))
+            ;; Take care of pwd
+            (substitute* '("tests/commands.at" "tests/variables.at")
+              (("/bin/pwd") (which "pwd")))
+            ;; The .at files create shell scripts without shebangs. Erk.
+            (substitute* "tests/commands.at"
+              (("./output.sh") "/bin/sh output.sh"))
+            (substitute* "tests/syntax.at"
+              (("; other_script.csh") "; /bin/sh other_script.csh"))
+            ;; Now, let's generate the test suite, patch it and finally run the
+            ;; tests.
+            (system* "make" "tests/testsuite")
+            (substitute* "tests/testsuite" (("/bin/sh") (which "sh")))
+            (apply check args)))
+        (alist-cons-after
+         'install 'post-install
+         (lambda* (#:key inputs outputs #:allow-other-keys)
+          (let* ((out (assoc-ref %outputs "out"))
+                 (bin (string-append out "/bin")))
+           (with-directory-excursion bin
+             (symlink "tcsh" "csh"))))
+         %standard-phases))
+        #:patches (list (assoc-ref %build-inputs "patch/skip-tests"))
+        #:patch-flags '("-p0")))
+    (home-page "http://www.tcsh.org/")
+    (synopsis "A Unix shell based on csh")
+    (description
+     "Tcsh is an enhanced, but completely compatible version of the Berkeley
+UNIX C shell (csh). It is a command language interpreter usable both as an
+interactive login shell and a shell script command processor. It includes a
+command-line editor, programmable word completion, spelling correction, a
+history mechanism, job control and a C-like syntax.")
+    (license bsd-4)))