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

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{ stdenv, lib, fetchurl, fetchFromGitHub }:
rec {
makeLanguages = { tessdataRev, tessdata ? null, all ? null, languages ? {} }:
let
tessdataSrc = fetchFromGitHub {
owner = "tesseract-ocr";
repo = "tessdata";
rev = tessdataRev;
sha256 = tessdata;
};
languageFile = lang: sha256: fetchurl {
url = "https://github.com/tesseract-ocr/tessdata/raw/${tessdataRev}/${lang}.traineddata";
inherit sha256;
};
in
{
all = stdenv.mkDerivation {
name = "all";
buildCommand = ''
mkdir $out
cd ${tessdataSrc}
cp *.traineddata $out
'';
outputHashMode = "recursive";
outputHashAlgo = "sha256";
outputHash = all;
};
};
v3 = makeLanguages {
tessdataRev = "3cf1e2df1fe1d1da29295c9ef0983796c7958b7d";
tessdata = "1v4b63v5nzcxr2y3635r19l7lj5smjmc9vfk0wmxlryxncb4vpg7";
all = "0yj6h9n6h0kzzcqsn3z87vsi8pa60szp0yiayb0znd0v9my0dqhn";
};
v4 = makeLanguages {
tessdataRev = "4.0.0";
tessdata = "1chw1ya5zf8aaj2ixr9x013x7vwwwjjmx6f2ag0d6i14lypygy28";
all = "0dqgkp369rcvq72yhgnzj1pj8yrv7kqzc7y6sqs7nzcq7l5qazlg";
};
}