Fix version (#319)

- install VERSION file and copy to build
- fix lookup for VERSION file in case of error
- update documentation for installing python bindings

docs/src/_install.rst

@@ -6,7 +6,10 @@
     cd build
 
     #configure using cmake
-    cmake ../aare -DCMAKE_INSTALL_PREFIX=/where/to/put/aare
+    cmake ../aare -DCMAKE_INSTALL_PREFIX=/where/to/put/aare 
+
+    #install python bindings
+    #cmake .. -DCMAKE_INSTALL_PREFIX=/where/to/put/aare  -DAARE_INSTALL_PYTHONEXT=ON -DAARE_PYTHON_BINDINGS=ON
 
     #build (replace 4 with the number of threads you want to use)
     make -j4 

python/CMakeLists.txt

@@ -62,6 +62,8 @@ foreach(FILE ${PYTHON_EXAMPLES})
   message(STATUS "Copying ${FILE} to ${CMAKE_BINARY_DIR}/${FILE}")
 endforeach(FILE ${PYTHON_EXAMPLES})
 
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/../VERSION
+               ${CMAKE_BINARY_DIR}/aare/VERSION)
 if(AARE_INSTALL_PYTHONEXT)
   install(
     TARGETS _aare
@@ -72,4 +74,8 @@ if(AARE_INSTALL_PYTHONEXT)
     FILES ${PYTHON_FILES}
     DESTINATION aare
     COMPONENT python)
+  install(
+    FILES ../VERSION
+    DESTINATION aare
+    COMPONENT python)
 endif()

python/aare/_version.py

@@ -5,4 +5,4 @@ from pathlib import Path
 try:
     __version__ = version('aare')
 except PackageNotFoundError:
-    __version__ = Path(__file__).parents[2].joinpath('VERSION').read_text().strip()
+    __version__ = Path(__file__).parent.joinpath('VERSION').read_text().strip()