From 5f29d7e9a55a1ab99f6c0adffba5d9761fbda869 Mon Sep 17 00:00:00 2001
From: Daniel Fullmer <danielrf12@gmail.com>
Date: Fri, 28 Aug 2020 20:17:13 -0700
Subject: [PATCH] k2pdfopt: set env var to find OCR language files

---
 pkgs/applications/misc/k2pdfopt/default.nix | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/pkgs/applications/misc/k2pdfopt/default.nix b/pkgs/applications/misc/k2pdfopt/default.nix
index 31accf811bc..431426e55fb 100644
--- a/pkgs/applications/misc/k2pdfopt/default.nix
+++ b/pkgs/applications/misc/k2pdfopt/default.nix
@@ -1,5 +1,5 @@
 { stdenv, runCommand, fetchzip, fetchurl, fetchpatch, fetchFromGitHub
-, cmake, pkgconfig, zlib, libpng
+, cmake, pkgconfig, zlib, libpng, makeWrapper
 , enableGSL ? true, gsl
 , enableGhostScript ? true, ghostscript
 , enableMuPDF ? true, mupdf
@@ -71,7 +71,7 @@ in stdenv.mkDerivation rec {
       --replace "<djvu.h>" "<libdjvu/ddjvuapi.h>"
   '';
 
-  nativeBuildInputs = [ cmake pkgconfig ];
+  nativeBuildInputs = [ cmake pkgconfig makeWrapper ];
 
   buildInputs =
   let
@@ -159,6 +159,10 @@ in stdenv.mkDerivation rec {
     install -D -m 755 k2pdfopt $out/bin/k2pdfopt
   '';
 
+  preFixup = optionalString enableTesseract ''
+    wrapProgram $out/bin/k2pdfopt --set-default TESSDATA_PREFIX ${tesseract4}/share/tessdata
+  '';
+
   meta = with stdenv.lib; {
     description = "Optimizes PDF/DJVU files for mobile e-readers (e.g. the Kindle) and smartphones";
     homepage = "http://www.willus.com/k2pdfopt";