Fix groff PDF engine

Fixes issue #51

bsc/groff/0001-Fix-cross-compilation-by-looking-for-ar.patch

@@ -0,0 +1,46 @@
+From 1454525f70b43a6957b7c9e1870e997368787da3 Mon Sep 17 00:00:00 2001
+From: Samuel Dionne-Riel <samuel@dionne-riel.com>
+Date: Fri, 8 Nov 2019 21:59:21 -0500
+Subject: [PATCH] Fix cross-compilation by looking for `ar`.
+
+---
+ Makefile.am  | 2 +-
+ configure.ac | 2 ++
+ 2 files changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/Makefile.am b/Makefile.am
+index d18c49b8..b1b53338 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -494,7 +494,7 @@ CCC=@CXX@
+ # INSTALL_INFO
+ # LN_S
+ 
+-AR=ar
++AR=@AR@
+ ETAGS=etags
+ ETAGSFLAGS=
+ # Flag that tells etags to assume C++.
+diff --git a/configure.ac b/configure.ac
+index 28e75f17..2449b9f5 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -37,6 +37,7 @@ AC_CONFIG_AUX_DIR([build-aux])
+ 
+ AC_CONFIG_HEADERS([src/include/config.h:src/include/config.hin])
+ AC_CONFIG_SRCDIR([src/roff/groff/groff.cpp])
++AC_CONFIG_MACRO_DIR([m4])
+ 
+ AC_USE_SYSTEM_EXTENSIONS
+ 
+@@ -72,6 +73,7 @@ GROFF_DOC_CHECK
+ GROFF_MAKEINFO
+ GROFF_TEXI2DVI
+ AC_PROG_RANLIB
++AC_CHECK_TOOL([AR], [ar], [ar])
+ GROFF_INSTALL_SH
+ GROFF_INSTALL_INFO
+ AC_PROG_INSTALL
+-- 
+2.23.0
+

bsc/groff/default.nix

@@ -0,0 +1,127 @@
+{ stdenv, fetchurl, perl
+, ghostscript #for postscript and html output
+, psutils, netpbm #for html output
+, buildPackages
+, autoreconfHook
+, pkgconfig
+, texinfo
+}:
+
+stdenv.mkDerivation rec {
+  pname = "groff";
+  version = "1.22.4";
+
+  src = fetchurl {
+    url = "mirror://gnu/groff/${pname}-${version}.tar.gz";
+    sha256 = "14q2mldnr1vx0l9lqp9v2f6iww24gj28iyh4j2211hyynx67p3p7";
+  };
+
+  enableParallelBuilding = false;
+
+  patches = [
+    ./0001-Fix-cross-compilation-by-looking-for-ar.patch
+  ];
+
+  postPatch = stdenv.lib.optionalString (psutils != null) ''
+    substituteInPlace src/preproc/html/pre-html.cpp \
+      --replace "psselect" "${psutils}/bin/psselect"
+  '' + stdenv.lib.optionalString (netpbm != null) ''
+    substituteInPlace src/preproc/html/pre-html.cpp \
+      --replace "pnmcut" "${stdenv.lib.getBin netpbm}/bin/pnmcut" \
+      --replace "pnmcrop" "${stdenv.lib.getBin netpbm}/bin/pnmcrop" \
+      --replace "pnmtopng" "${stdenv.lib.getBin netpbm}/bin/pnmtopng"
+    substituteInPlace tmac/www.tmac.in \
+      --replace "pnmcrop" "${stdenv.lib.getBin netpbm}/bin/pnmcrop" \
+      --replace "pngtopnm" "${stdenv.lib.getBin netpbm}/bin/pngtopnm" \
+      --replace "@PNMTOPS_NOSETPAGE@" "${stdenv.lib.getBin netpbm}/bin/pnmtops -nosetpage"
+  '';
+
+  buildInputs = [ ghostscript psutils netpbm perl ];
+  nativeBuildInputs = [ autoreconfHook pkgconfig texinfo ];
+
+  # Builds running without a chroot environment may detect the presence
+  # of /usr/X11 in the host system, leading to an impure build of the
+  # package. To avoid this issue, X11 support is explicitly disabled.
+  # Note: If we ever want to *enable* X11 support, then we'll probably
+  # have to pass "--with-appresdir", too.
+  configureFlags = [
+    "--without-x"
+  ] ++ stdenv.lib.optionals (ghostscript != null) [
+    "--with-gs=${ghostscript}/bin/gs"
+  ] ++ stdenv.lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
+    "ac_cv_path_PERL=${buildPackages.perl}/bin/perl"
+  ];
+
+  makeFlags = stdenv.lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
+    # Trick to get the build system find the proper 'native' groff
+    # http://www.mail-archive.com/bug-groff@gnu.org/msg01335.html
+    "GROFF_BIN_PATH=${buildPackages.groff}/bin"
+    "GROFFBIN=${buildPackages.groff}/bin/groff"
+  ];
+
+  doCheck = true;
+
+  postInstall = ''
+    for f in 'man.local' 'mdoc.local'; do
+        cat '${./site.tmac}' >>"$out/share/groff/site-tmac/$f"
+    done
+
+    moveToOutput bin/gropdf $out
+    moveToOutput bin/pdfmom $out
+    moveToOutput bin/roff2text $out
+    moveToOutput bin/roff2pdf $out
+    moveToOutput bin/roff2ps $out
+    moveToOutput bin/roff2dvi $out
+    moveToOutput bin/roff2ps $out
+    moveToOutput bin/roff2html $out
+    moveToOutput bin/glilypond $out
+    moveToOutput bin/mmroff $out
+    moveToOutput bin/roff2x $out
+    moveToOutput bin/afmtodit $out
+    moveToOutput bin/gperl $out
+    moveToOutput bin/chem $out
+    moveToOutput share/groff/${version}/font/devpdf $out
+
+    # idk if this is needed, but Fedora does it
+    moveToOutput share/groff/${version}/tmac/pdf.tmac $out
+
+    moveToOutput bin/gpinyin $out
+    moveToOutput lib/groff/gpinyin $out
+    substituteInPlace $out/bin/gpinyin \
+      --replace $out/lib/groff/gpinyin $out/lib/groff/gpinyin
+
+    moveToOutput bin/groffer $out
+    moveToOutput lib/groff/groffer $out
+    substituteInPlace $out/bin/groffer \
+      --replace $out/lib/groff/groffer $out/lib/groff/groffer
+
+    moveToOutput bin/grog $out
+    moveToOutput lib/groff/grog $out
+    substituteInPlace $out/bin/grog \
+      --replace $out/lib/groff/grog $out/lib/groff/grog
+
+  '' + stdenv.lib.optionalString (stdenv.buildPlatform != stdenv.hostPlatform) ''
+    find $out/ -type f -print0 | xargs --null sed -i 's|${buildPackages.perl}|${perl}|'
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = "https://www.gnu.org/software/groff/";
+    description = "GNU Troff, a typesetting package that reads plain text and produces formatted output";
+    license = licenses.gpl3Plus;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ pSub ];
+
+    longDescription = ''
+      groff is the GNU implementation of troff, a document formatting
+      system.  Included in this release are implementations of troff,
+      pic, eqn, tbl, grn, refer, -man, -mdoc, -mom, and -ms macros,
+      and drivers for PostScript, TeX dvi format, HP LaserJet 4
+      printers, Canon CAPSL printers, HTML and XHTML format (beta
+      status), and typewriter-like devices.  Also included is a
+      modified version of the Berkeley -me macros, the enhanced
+      version gxditview of the X11 xditview previewer, and an
+      implementation of the -mm macros.
+    '';
+
+  };
+}

bsc/groff/site.tmac

@@ -0,0 +1,16 @@
+.
+.if n \{\
+.  \" Character translations for non-keyboard
+.  \" characters - to make them searchable
+.  if '\*[.T]'utf8' \{\
+.    char \- \N'45'
+.    char - \N'45'
+.    char ' \N'39'
+.    char \' \N'39'
+.  \}
+.
+.  \" Shut off SGR by default (groff colors)
+.  \" Require GROFF_SGR envvar defined to turn it on
+.  if '\V[GROFF_SGR]'' \
+.    output x X tty: sgr 0
+.\}

overlay.nix

@@ -150,6 +150,8 @@ let
       enableStatic = true;
     };
 
+    groff = callPackage ./bsc/groff/default.nix { };
+
     nixtools = callPackage ./bsc/nixtools/default.nix { };
 
     garlicTools = callPackage ./garlic/tools.nix {};