gnu: Add txr.

* gnu/packages/lisp.scm (txr): New variable.
* gnu/packages/patches/txr-shell.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

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

gnu/local.mk

@@ -1318,6 +1318,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/totem-meson-easy-codec.patch		\
   %D%/packages/patches/tuxpaint-stamps-path.patch		\
   %D%/packages/patches/twinkle-include-qregexpvalidator.patch	\
+  %D%/packages/patches/txr-shell.patch				\
   %D%/packages/patches/u-boot-fix-mkimage-header-verification.patch	\
   %D%/packages/patches/unzip-CVE-2014-8139.patch		\
   %D%/packages/patches/unzip-CVE-2014-8140.patch		\

gnu/packages/lisp.scm

@@ -14,6 +14,7 @@
 ;;; Copyright © 2018 Pierre Langlois <pierre.langlois@gmx.com>
 ;;; Copyright © 2019 Katherine Cox-Buday <cox.katherine.e@gmail.com>
 ;;; Copyright © 2019 Jesse Gildersleve <jessejohngildersleve@protonmail.com>
+;;; Copyright © 2019 Guillaume Le Vaillant <glv@posteo.net>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -45,8 +46,10 @@ (define-module (gnu packages lisp)
   #:use-module (gnu packages admin)
   #:use-module (gnu packages base)
   #:use-module (gnu packages bdw-gc)
+  #:use-module (gnu packages bison)
   #:use-module (gnu packages compression)
   #:use-module (gnu packages ed)
+  #:use-module (gnu packages flex)
   #:use-module (gnu packages fontutils)
   #:use-module (gnu packages gcc)
   #:use-module (gnu packages gettext)
@@ -5321,3 +5324,48 @@ (define-public cl-find-port
 
 (define-public ecl-find-port
   (sbcl-package->ecl-package sbcl-find-port))
+
+(define-public txr
+  (package
+    (name "txr")
+    (version "216")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "http://www.kylheku.com/cgit/txr/snapshot/txr-"
+                           version
+                           ".tar.bz2"))
+       (patches (search-patches "txr-shell.patch"))
+       (sha256
+        (base32
+         "07cxdpc9zsqd0c2668g00dqjpd6zc4mfdn74aarr6d2hpzdhh937"))))
+    (build-system gnu-build-system)
+    (arguments
+     '(#:configure-flags '("cc=gcc")
+       #:phases (modify-phases %standard-phases
+                  (add-after 'configure 'fix-tests
+                    (lambda _
+                      (substitute* "tests/017/realpath.tl"
+                        (("/usr/bin") "/"))
+                      (substitute* "tests/017/realpath.expected"
+                        (("/usr/bin") "/"))
+                      #t))
+                  (replace 'check
+                    (lambda _
+                      (zero? (system* "make" "tests")))))))
+    (native-inputs
+     `(("bison" ,bison)
+       ("flex" ,flex)))
+    (inputs
+     `(("libffi" ,libffi)))
+    (synopsis "General-purpose, multi-paradigm programming language")
+    (description
+     "TXR is a general-purpose, multi-paradigm programming language.  It
+comprises two languages integrated into a single tool: a text scanning and
+extraction language referred to as the TXR Pattern Language (sometimes just
+\"TXR\"), and a general-purpose dialect of Lisp called TXR Lisp.  TXR can be
+used for everything from \"one liner\" data transformation tasks at the
+command line, to data scanning and extracting scripts, to full application
+development in a wide-range of areas.")
+    (home-page "https://nongnu.org/txr/")
+    (license license:bsd-2)))

gnu/packages/patches/txr-shell.patch

@@ -0,0 +1,59 @@
+Use the current shell instead of trying to find another one and
+failing to do so.
+
+diff --git a/configure b/configure
+index f1adb919..7891b4dc 100755
+--- a/configure
++++ b/configure
+@@ -26,28 +26,6 @@
+ # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ 
+-#
+-# The #!/bin/sh might be some legacy piece of crap,
+-# not even up to 1990 POSIX.2 spec. So the first step
+-# is to look for a better shell in some known places
+-# and re-execute ourselves with that interpreter.
+-#
+-
+-if test x$txr_shell = x ; then
+-  for shell in /bin/bash /usr/bin/bash /usr/xpg4/bin/sh ; do
+-    if test -x $shell ; then
+-       txr_shell=$shell
+-       break
+-    fi
+-  done
+-  if test x$txr_shell = x ; then
+-    echo "No known POSIX shell found: falling back on /bin/sh, which may not work"
+-    txr_shell=/bin/sh
+-  fi
+-  export txr_shell
+-  exec $txr_shell $0 ${@+"$@"}
+-fi
+-
+ set -u
+ 
+ #
+@@ -190,13 +168,6 @@ while [ $# -gt 0 ] ; do
+     exit 1
+   fi
+ 
+-  eval "var_exists=\${$var+y}"
+-
+-  if [ "$var_exists" != y ] ; then
+-    printf "$0: nonexistent option: '%s'\n" "$1"
+-    exit 1
+-  fi
+-
+   eval "$var='$val'"
+ 
+   eval "var_given_exists=\${${var}_given+y}"
+@@ -208,6 +179,8 @@ while [ $# -gt 0 ] ; do
+   shift
+ done
+ 
++txr_shell=$CONFIG_SHELL
++
+ #
+ # If --help was given (or --help=<nonempty> or help=<nonempty>) then
+ # print help and exit. The termination status is failed, to indicate