nixpkgs/pkgs/applications/graphics/tesseract/default.nix

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{ stdenv, fetchurl, libtiff }:
let
f = lang : sha256 : let
src = fetchurl {
url = "http://tesseract-ocr.googlecode.com/files/${lang}.traineddata.gz";
inherit sha256;
};
in
"gunzip -c ${src} > $out/share/tessdata/${lang}.traineddata";
extraLanguages = ''
${f "cat" "1qndk8qygw9bq7nzn7kzgxkm3jhlq7jgvdqpj5id4rrcaavjvifw"}
${f "rus" "0yjzks189bgcmi2vr4v0l0fla11qdrw3cb1nvpxl9mdis8qr9vcc"}
${f "spa" "1q1hw3qi95q5ww3l02fbhjqacxm34cp65fkbx10wjdcg0s5p9q2x"}
${f "nld" "0cbqfhl2rwb1mg4y1140nw2vhhcilc0nk7bfbnxw6bzj1y5n49i8"}
'';
in
stdenv.mkDerivation {
name = "tesseract-3.0.0";
src = fetchurl {
url = http://tesseract-ocr.googlecode.com/files/tesseract-3.00.tar.gz;
sha256 = "111r9hy1rcs2ch4kdi9dkzwch3xg38vv379sf3cjpkswkigx8clw";
};
buildInputs = [ libtiff ];
postInstall = extraLanguages;
meta = {
description = "OCR engine";
homepage = http://code.google.com/p/tesseract-ocr/;
license = "Apache2.0";
maintainers = with stdenv.lib.maintainers; [viric];
platforms = with stdenv.lib.platforms; linux;
};
}