Switch requirements to pip-compile

.gitignore

@@ -108,3 +108,6 @@ venv.bak/
 
 # PyCharm
 .idea
+
+# requirements.txt (generated by pip-compile)
+requirements.txt

Makefile

+
+.PHONY: release
+release: requirements.txt
+	pypi-release
+
+requirements.txt: requirements.in requirements-devel
+	pip-compile
+
+.PHONY: requirements-devel
+requirements-devel:
+	pip install -r requirements-devel.txt 
+

requirements-devel.txt

+pip-tools
+twine
+bump2version
+setuptools
+wheel

requirements.in

+ocr4all-pixel-classifier~=0.5
+ocr4all-pylib~=0.1
+tqdm
+pypagexml
+numpy
+tensorflow

requirements.txt

-ocr4all-pixel-classifier~=0.4
-tqdm
-pypagexml
-numpy

setup.py

@@ -20,11 +20,7 @@ setup(
             'page-segmentation=ocr4all_pixel_classifier_frontend.main:main',  # legacy
         ],
     },
-    install_requires=open("requirements.txt").read().split(),
-    extras_require={
-        'tf_cpu': ['tensorflow>=2.0.0,<2.1.0'],
-        'tf_gpu': ['tensorflow-gpu>=2.0.0,<2.1.0'],
-    },
+    install_requires=open("requirements.in").read().split(),
     classifiers=[
         "Programming Language :: Python :: 3",
         "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",