nixpkgs/pkgs/development/python-modules/pyocr/paths.patch
aszlig ca1ea69972
python/pyocr: 0.4.6 -> 0.4.7
Upstream changes:

  * Tesseract 4.00.00alpha:
    * Version parsing: Ignore suffix (so '4.00.00alpha' == (4, 0, 0))
    * Libtesseract: Load libtesseract.so.4 instead of libtesseract.so.3
      if available
  * Support for Tesseract 3.05.00:
    * Builders: Split field 'tess_conf' into 'tess_flags' and 'tess_conf'
    * Libtesseract: If available, use
                    TessBaseAPIDetectOrientationScript() instead of
                    TessBaseAPIDetectOS
  * Libtesseract:
    * Workaround: Prevents possible segfault in image_to_string() when
                  the target language is not available

Full upstream change log can be found at:

https://github.com/openpaperwork/pyocr/blob/b006123d1d002711b9/ChangeLog

The tesseract.patch for supporting Tesseract version 3.05.00 has been
applied upstream and we can safely drop it.

We now use substituteInPlace in conjunction with a patch to insert the
relevant store paths instead of sed, so it's less fragile whenever we
have upstream changes in handling of these paths.

I've tested this by reverting 48a941e29faa95e897f and applying a build
fix patch of Cuneiform 1.1.0 from Arch Linux, because right now
Cuneiform is an experimental version that can't be fixed on behalf of
pyocr (the reason is that pyocr needs to get a list of languages, which
doesn't work in that version anymore).

In addition to that I've successfully built paperwork-backend which by
now is the one package which depends on pyocr. However, I didn't do
runtime tests of Paperwork.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Cc: @7c6f434c
2017-09-02 05:31:22 +02:00

112 lines
3.4 KiB
Diff

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"