depot/third_party/nixpkgs/pkgs/development/python-modules/pyocr/paths-tesseract.patch

commit cfc05af26b571e9ca09e9c709c0fb8934e9e46dd
Author: Guillaume Girol <symphorien+git@xlumurb.eu>
Date:   Sat Aug 20 17:48:01 2022 +0200

    Fix finding tesseract

diff --git a/src/pyocr/libtesseract/tesseract_raw.py b/src/pyocr/libtesseract/tesseract_raw.py
index 1edec8c..434a336 100644
--- a/src/pyocr/libtesseract/tesseract_raw.py
+++ b/src/pyocr/libtesseract/tesseract_raw.py
@@ -2,7 +2,6 @@ import ctypes
 import locale
 import logging
 import os
-import sys
 
 from ..error import TesseractError
 
@@ -10,51 +9,16 @@ from ..error import TesseractError
 logger = logging.getLogger(__name__)
 
 TESSDATA_PREFIX = os.getenv('TESSDATA_PREFIX', None)
-libnames = []
+if TESSDATA_PREFIX is None:
+    TESSDATA_PREFIX = '@tesseract@/share/tessdata'
+    os.environ['TESSDATA_PREFIX'] = TESSDATA_PREFIX
+
+
 # 70 is the minimum credible dpi for tesseract and force it to compute an
 # estimate of the image dpi
 DPI_DEFAULT = 70
 
-
-if getattr(sys, 'frozen', False) and hasattr(sys, '_MEIPASS'):
-    # 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 = os.path.join(tessdata, "tessdata")
-
-
-if sys.platform[:3] == "win":  # pragma: no cover
-    libnames += [
-        # Jflesch> Don't they have the equivalent of LD_LIBRARY_PATH on
-        # Windows ?
-        "../vs2010/DLL_Release/libtesseract302.dll",
-        # prefer the most recent first
-        "libtesseract305.dll",
-        "libtesseract304.dll",
-        "libtesseract303.dll",
-        "libtesseract302.dll",
-        "libtesseract400.dll",  # Tesseract 4 is still in alpha stage
-        "libtesseract.dll",
-        "C:\\Program Files (x86)\\Tesseract-OCR\\libtesseract-4.dll",
-        "C:\\Program Files (x86)\\Tesseract-OCR\\libtesseract-3.dll",
-    ]
-else:
-    libnames += [
-        "libtesseract.so.5",
-        "libtesseract.so.4",
-        "libtesseract.so.3",
-        "libtesseract.5.dylib",
-        "libtesseract.4.dylib",
-    ]
-
+libnames = [ "@tesseractLibraryLocation@" ]
 
 g_libtesseract = None
 
@@ -367,12 +331,12 @@ def init(lang=None):
     try:
         if lang:
             lang = lang.encode("utf-8")
-        prefix = None
-        if TESSDATA_PREFIX:  # pragma: no cover
-            prefix = TESSDATA_PREFIX.encode("utf-8")
+
+        prefix = TESSDATA_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 0fe0d20..c1fdd27 100644
--- a/src/pyocr/tesseract.py
+++ b/src/pyocr/tesseract.py
@@ -28,8 +28,7 @@ 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 = '@tesseract@/bin/tesseract'
 
 TESSDATA_EXTENSION = ".traineddata"
 
diff --git a/tests/test_libtesseract.py b/tests/test_libtesseract.py
index cc31a50..890c02c 100644
--- a/tests/test_libtesseract.py
+++ b/tests/test_libtesseract.py
@@ -167,7 +167,8 @@ class TestLibTesseractRaw(BaseTest):
             args = libtess.TessBaseAPIInit3.call_args[0]
             self.assertEqual(len(args), 3)
             self.assertEqual(args[0].value, self.handle)
-            self.assertEqual(args[1].value, None)
+            # we hardcode tesseract data, so we don't get None
+            #self.assertEqual(args[1].value, None)
             self.assertEqual(args[2].value, lang.encode() if lang else None)
 
             self.assertEqual(
@@ -203,7 +204,8 @@ class TestLibTesseractRaw(BaseTest):
             args = libtess.TessBaseAPIInit3.call_args[0]
             self.assertEqual(len(args), 3)
             self.assertEqual(args[0].value, self.handle)
-            self.assertEqual(args[1].value, None)
+            # we hardcode tesseract data, so we don't get None
+            #self.assertEqual(args[1].value, None)
             self.assertEqual(args[2].value, lang.encode() if lang else None)
 
             self.assertEqual(
diff --git a/tests/test_tesseract.py b/tests/test_tesseract.py
index 823818f..2ee5fb4 100644
--- a/tests/test_tesseract.py
+++ b/tests/test_tesseract.py
@@ -37,7 +37,7 @@ class TestTesseract(BaseTest):
     def test_available(self, which):
         which.return_value = True
         self.assertTrue(tesseract.is_available())
-        which.assert_called_once_with("tesseract")
+        which.assert_called_once_with("@tesseract@/bin/tesseract")
 
     @patch("subprocess.Popen")
     def test_version_error(self, popen):
@@ -163,7 +163,7 @@ class TestTesseract(BaseTest):
         for lang in ("eng", "fra", "jpn", "osd"):
             self.assertIn(lang, langs)
         popen.assert_called_once_with(
-            ["tesseract", "--list-langs"],
+            ["@tesseract@/bin/tesseract", "--list-langs"],
             startupinfo=None, creationflags=0,
             stdout=subprocess.PIPE, stderr=subprocess.STDOUT
         )
@@ -178,7 +178,7 @@ class TestTesseract(BaseTest):
         self.assertEqual(te.exception.status, 1)
         self.assertEqual("unable to get languages", te.exception.message)
         popen.assert_called_once_with(
-            ["tesseract", "--list-langs"],
+            ["@tesseract@/bin/tesseract", "--list-langs"],
             startupinfo=None, creationflags=0,
             stdout=subprocess.PIPE, stderr=subprocess.STDOUT
         )
@@ -255,7 +255,7 @@ class TestTesseract(BaseTest):
         self.assertEqual(status, 0)
         self.assertEqual(error, message)
         popen.assert_called_once_with(
-            ["tesseract", "input.bmp", "output"],
+            ["@tesseract@/bin/tesseract", "input.bmp", "output"],
             cwd=tmpdir,
             startupinfo=None,
             creationflags=0,
@@ -278,7 +278,7 @@ class TestTesseract(BaseTest):
         self.assertEqual(status, 0)
         self.assertEqual(error, message)
         popen.assert_called_with(
-            ["tesseract", "input2.bmp", "output2", "-l", "fra", "--psm", "3"],
+            ["@tesseract@/bin/tesseract", "input2.bmp", "output2", "-l", "fra", "--psm", "3"],
             cwd=tmpdir,
             startupinfo=None,
             creationflags=0,
@@ -309,7 +309,7 @@ class TestTesseract(BaseTest):
             self.assertEqual(result["angle"], 90)
             self.assertEqual(result["confidence"], 9.30)
             popen.assert_called_once_with(
-                ["tesseract", "input.bmp", "stdout", "--psm", "0"],
+                ["@tesseract@/bin/tesseract", "input.bmp", "stdout", "--psm", "0"],
                 stdin=subprocess.PIPE,
                 shell=False,
                 startupinfo=None,
@@ -345,7 +345,7 @@ class TestTesseract(BaseTest):
             self.assertEqual(result["angle"], 90)
             self.assertEqual(result["confidence"], 9.30)
             popen.assert_called_once_with(
-                ["tesseract", "input.bmp", "stdout", "--psm", "0"],
+                ["@tesseract@/bin/tesseract", "input.bmp", "stdout", "--psm", "0"],
                 stdin=subprocess.PIPE,
                 shell=False,
                 startupinfo=None,
@@ -378,7 +378,7 @@ class TestTesseract(BaseTest):
             self.assertEqual(result["angle"], 90)
             self.assertEqual(result["confidence"], 9.30)
             popen.assert_called_once_with(
-                ["tesseract", "input.bmp", "stdout",
+                ["@tesseract@/bin/tesseract", "input.bmp", "stdout",
                  "--psm", "0", "-l", "osd"],
                 stdin=subprocess.PIPE,
                 shell=False,
@@ -406,7 +406,7 @@ class TestTesseract(BaseTest):
             with self.assertRaises(tesseract.TesseractError) as te:
                 tesseract.detect_orientation(self.image)
             popen.assert_called_once_with(
-                ["tesseract", "input.bmp", "stdout", "--psm", "0"],
+                ["@tesseract@/bin/tesseract", "input.bmp", "stdout", "--psm", "0"],
                 stdin=subprocess.PIPE,
                 shell=False,
                 startupinfo=None,
@@ -440,7 +440,7 @@ class TestTesseract(BaseTest):
             with self.assertRaises(tesseract.TesseractError) as te:
                 tesseract.detect_orientation(self.image)
             popen.assert_called_once_with(
-                ["tesseract", "input.bmp", "stdout", "--psm", "0"],
+                ["@tesseract@/bin/tesseract", "input.bmp", "stdout", "--psm", "0"],
                 stdin=subprocess.PIPE,
                 shell=False,
                 startupinfo=None,
@@ -474,7 +474,7 @@ class TestTesseract(BaseTest):
             self.assertEqual(result["angle"], 90)
             self.assertEqual(result["confidence"], 9.30)
             popen.assert_called_once_with(
-                ["tesseract", "input.bmp", "stdout", "-psm", "0"],
+                ["@tesseract@/bin/tesseract", "input.bmp", "stdout", "-psm", "0"],
                 stdin=subprocess.PIPE,
                 shell=False,
                 startupinfo=None,
@@ -507,7 +507,7 @@ class TestTesseract(BaseTest):
             self.assertEqual(result["angle"], 90)
             self.assertEqual(result["confidence"], 9.30)
             popen.assert_called_once_with(
-                ["tesseract", "input.bmp", "stdout", "-psm", "0", "-l", "fra"],
+                ["@tesseract@/bin/tesseract", "input.bmp", "stdout", "-psm", "0", "-l", "fra"],
                 stdin=subprocess.PIPE,
                 shell=False,
                 startupinfo=None,
@@ -534,7 +534,7 @@ class TestTesseract(BaseTest):
             with self.assertRaises(tesseract.TesseractError) as te:
                 tesseract.detect_orientation(self.image)
             popen.assert_called_once_with(
-                ["tesseract", "input.bmp", "stdout", "-psm", "0"],
+                ["@tesseract@/bin/tesseract", "input.bmp", "stdout", "-psm", "0"],
                 stdin=subprocess.PIPE,
                 shell=False,
                 startupinfo=None,
@@ -568,7 +568,7 @@ class TestTesseract(BaseTest):
             with self.assertRaises(tesseract.TesseractError) as te:
                 tesseract.detect_orientation(self.image)
             popen.assert_called_once_with(
-                ["tesseract", "input.bmp", "stdout", "-psm", "0"],
+                ["@tesseract@/bin/tesseract", "input.bmp", "stdout", "-psm", "0"],
                 stdin=subprocess.PIPE,
                 shell=False,
                 startupinfo=None,