nixpkgs/pkgs/development/python-modules/pyocr/paths.patch

diff --git a/src/pyocr/cuneiform.py b/src/pyocr/cuneiform.py
index a461d92..1f2b914 100644
--- a/src/pyocr/cuneiform.py
+++ b/src/pyocr/cuneiform.py
@@ -27,13 +27,9 @@ from . import error
 from . import util
 
 
-# CHANGE THIS IF CUNEIFORM IS NOT IN YOUR PATH, OR IS NAMED DIFFERENTLY
-CUNEIFORM_CMD = 'cuneiform'
+CUNEIFORM_CMD = '@NIX_CUNEIFORM_CMD@'
 
-CUNEIFORM_DATA_POSSIBLE_PATHS = [
-    "/usr/local/share/cuneiform",
-    "/usr/share/cuneiform",
-]
+CUNEIFORM_DATA_POSSIBLE_PATHS = ['@NIX_CUNEIFORM_DATA@']
 
 LANGUAGES_LINE_PREFIX = "Supported languages: "
 LANGUAGES_SPLIT_RE = re.compile("[^a-z]")
diff --git a/src/pyocr/libtesseract/tesseract_raw.py b/src/pyocr/libtesseract/tesseract_raw.py
index b4e7bda..47505f7 100644
--- a/src/pyocr/libtesseract/tesseract_raw.py
+++ b/src/pyocr/libtesseract/tesseract_raw.py
@@ -1,55 +1,13 @@
 import ctypes
 import logging
 import os
-import sys
 
 from ..error import TesseractError
 
 
 logger = logging.getLogger(__name__)
 
-TESSDATA_PREFIX = os.getenv('TESSDATA_PREFIX', None)
-libnames = []
-
-if getattr(sys, 'frozen', False):
-    # Pyinstaller integration
-    libnames += [os.path.join(sys._MEIPASS, "libtesseract-4.dll")]
-    libnames += [os.path.join(sys._MEIPASS, "libtesseract-3.dll")]
-    tessdata = os.path.join(sys._MEIPASS, "data")
-    if not os.path.exists(os.path.join(tessdata, "tessdata")):
-        logger.warning(
-            "Running from container, but no tessdata ({}) found !".format(
-                tessdata
-            )
-        )
-    else:
-        TESSDATA_PREFIX = tessdata
-
-
-if sys.platform[:3] == "win":
-    libnames += [
-        # Jflesch> Don't they have the equivalent of LD_LIBRARY_PATH on
-        # Windows ?
-        "../vs2010/DLL_Release/libtesseract302.dll",
-        "libtesseract302.dll",
-        "C:\\Program Files (x86)\\Tesseract-OCR\\libtesseract-4.dll",
-        "C:\\Program Files (x86)\\Tesseract-OCR\\libtesseract-3.dll",
-    ]
-else:
-    libnames += [
-        "libtesseract.so.4",
-        "libtesseract.so.3",
-    ]
-
-
-g_libtesseract = None
-
-for libname in libnames:
-    try:
-        g_libtesseract = ctypes.cdll.LoadLibrary(libname)
-        break
-    except OSError:
-        pass
+g_libtesseract = ctypes.cdll.LoadLibrary('@NIX_LIBTESSERACT_PATH@')
 
 
 class PageSegMode(object):
@@ -326,12 +284,11 @@ def init(lang=None):
     try:
         if lang:
             lang = lang.encode("utf-8")
-        prefix = None
-        if TESSDATA_PREFIX:
-            prefix = TESSDATA_PREFIX.encode("utf-8")
+        prefix = os.getenv('TESSDATA_PREFIX', '@NIX_TESSDATA_PREFIX@')
+        os.environ['TESSDATA_PREFIX'] = prefix
         g_libtesseract.TessBaseAPIInit3(
             ctypes.c_void_p(handle),
-            ctypes.c_char_p(prefix),
+            ctypes.c_char_p(prefix.encode('utf-8')),
             ctypes.c_char_p(lang)
         )
         g_libtesseract.TessBaseAPISetVariable(
diff --git a/src/pyocr/tesseract.py b/src/pyocr/tesseract.py
index c935881..7139ffe 100755
--- a/src/pyocr/tesseract.py
+++ b/src/pyocr/tesseract.py
@@ -31,8 +31,7 @@ from .builders import DigitBuilder  # backward compatibility
 from .error import TesseractError  # backward compatibility
 from .util import digits_only
 
-# CHANGE THIS IF TESSERACT IS NOT IN YOUR PATH, OR IS NAMED DIFFERENTLY
-TESSERACT_CMD = 'tesseract.exe' if os.name == 'nt' else 'tesseract'
+TESSERACT_CMD = '@NIX_TESSERACT_CMD@'
 
 TESSDATA_EXTENSION = ".traineddata"