Have itl2py Take Care of CMake Config File Dir

So users won't have to pass that to `pip install`.

.github/workflows/pyopendds.yml

@@ -7,7 +7,7 @@ on:
   pull_request:
     branches:
       - master
-  workflow_dispatch: 
+  workflow_dispatch:
   schedule:
     - cron: "0 3 * * 5"
 
@@ -61,7 +61,7 @@ jobs:
         make
         itl2py -o basic_output basic_idl basic.itl
         cd basic_output
-        basic_idl_DIR=$(realpath ..) python -m pip --verbose install .
+        python -m pip --verbose install .
 
     - name: Run Basic Test
       run: |
@@ -77,7 +77,7 @@ jobs:
         make
         itl2py -o basic_output basic_idl basic.itl
         cd basic_output
-        basic_idl_DIR=$(realpath ..) python -m pip --verbose install .
+        python -m pip --verbose install .
 
     - name: Run Basic C++11 Test
       run: |

README.md

@@ -16,8 +16,7 @@ limitations.
 - Python >= 3.7
   - This uses the C API of CPython, so PyPy or any other Python implementation
     is not supported.
-- OpenDDS
-  - Right now this is being developed using the master branch of OpenDDS.
+- OpenDDS >= 3.16
 - CMake >= 3.12
 - A C++14 Compiler
 
@@ -40,7 +39,7 @@ make
 # Build and Install Basic Test Python Type Support
 itl2py -o basic_output basic_idl basic.itl
 cd basic_output
-basic_idl_DIR=$(realpath ..) pip install .
+pip install .
 
 # Run Basic Test
 cd ../..

docs/getting_started.rst

@@ -20,7 +20,7 @@ below in this directory.
     # Build and Install Basic Test Python Type Support
     itl2py -o basic_output basic_idl basic.itl
     cd basic_output
-    basic_idl_DIR=$(realpath ..) pip install .
+    pip install .
 
     # Run Basic Test
     cd ../..

pyopendds/dev/itl2py/__main__.py

@@ -29,6 +29,12 @@ def main():
         help='''\
 Name of the native Python extension package to create. By default this is \'_\'
 and the name of the Python package.''')
+    argparser.add_argument('--idl-library-build-dir',
+        metavar='IDL_LIBRARY_BUILD_DIR', type=Path,
+        help='''\
+Location of the CMake config file to use. By default this will be the location
+of all the input ITL files if they are in the same location. If they are not or
+the exepcted config file is not there, then this option becomes required.'''),
     argparser.add_argument('--default-encoding',
         type=str, default='utf_8',
         help='Default encoding of strings. By default this is UTF-8.')
@@ -47,6 +53,20 @@ def main():
         args.package_name = 'py' + args.itl_files[0].stem
     if args.native_package_name is None:
         args.native_package_name = '_' + args.package_name
+    if args.idl_library_build_dir is None:
+        args.idl_library_build_dir = args.itl_files[0].resolve().parent
+        for path in args.itl_files[1:]:
+            if path.resolve().parent != args.idl_library_build_dir:
+                sys.exit('''\
+--idl-library-build-dir is required when ITL files are in different directories''')
+    else:
+        args.idl_library_build_dir = args.idl_library_build_dir.resolve()
+    config_filename = '{}Config.cmake'.format(args.idl_library_cmake_name)
+    config_path = args.idl_library_build_dir / config_filename
+    if not config_path.is_file():
+        sys.exit('''\
+Native IDL library CMake config file {} does not exist, please pass the
+directory for it (where cmake was ran) using --idl-library-build-dir'''.format(config_path))
 
     # Generate The Python Package
     generate(vars(args))

pyopendds/dev/itl2py/generate.py

@@ -71,6 +71,7 @@ def generate(context: dict) -> None:
     '''Generate a Python IDL binding package given a dict of arguments. The
     arguments are the following:
         - idl_library_cmake_name
+        - idl_library_build_dir
         - itl_files
         - output
         - package_name

pyopendds/dev/itl2py/templates/CMakeLists.txt

@@ -8,6 +8,7 @@ find_package(Python3 ${PYOPENDDS_PYTHON_VERSION} EXACT
   REQUIRED
 )
 find_package(OpenDDS REQUIRED)
+set({{ idl_library_cmake_name }}_DIR {{ idl_library_build_dir }})
 find_package({{ idl_library_cmake_name }} REQUIRED)
 
 Python3_add_library({{ native_package_name }} MODULE {{ native_package_name }}.cpp)