Build and install Python wrappers #294 (#298)

* cmake: build python extension
* Python: remove obsolete clear_screen_start
* Debian: python3-cffi, not python-cffi
* Debian: add dep on python3-setuptools
* Python: build extension module from CMake #294
* Python: install python wrappers #294
* drone: disable focal for now

.drone.yml

@@ -17,22 +17,22 @@ steps:
     - cmake .. -DCMAKE_BUILD_TYPE=Release
     - make
     - make test || ./notcurses-tester -p ../data
----
-kind: pipeline
-type: docker
-name: ubuntu-focal
-
-steps:
-- name: ubuntu-build
-  image: dankamongmen/focal:2020-01-25b
-  commands:
-    - apt-get update
-    - apt-get -y dist-upgrade
-    - apt-get -y install git-buildpackage
-    - mk-build-deps --install -t'apt-get -y'
-    - export LANG=en_US.UTF-8
-    - mkdir build
-    - cd build
-    - cmake .. -DCMAKE_BUILD_TYPE=Release
-    - make
-    - make test || ./notcurses-tester -p ../data
+#---
+#kind: pipeline
+#type: docker
+#name: ubuntu-focal
+#
+#steps:
+#- name: ubuntu-build
+#  image: dankamongmen/focal:2020-01-25b
+#  commands:
+#    - apt-get update
+#    - apt-get -y dist-upgrade
+#    - apt-get -y install git-buildpackage
+#    - mk-build-deps --install -t'apt-get -y'
+#    - export LANG=en_US.UTF-8
+#    - mkdir build
+#    - cd build
+#    - cmake .. -DCMAKE_BUILD_TYPE=Release
+#    - make
+#    - make test || ./notcurses-tester -p ../data

.gitignore

@@ -1,4 +1,3 @@
-debian
 obj-x86_64-linux-gnu
 python/.eggs/
 python/build/

CMakeLists.txt

@@ -431,8 +431,30 @@ write_basic_package_version_file(
 )
 
 # Python bindings
-find_package(Python3 COMPONENTS Development REQUIRED)
-# FIXME
+find_package(Python3 COMPONENTS Development Interpreter REQUIRED)
+file(GLOB PYSRC CONFIGURE_DEPENDS python/src/notcurses/*.py)
+set(SETUP_PY_IN "${CMAKE_CURRENT_SOURCE_DIR}/python/setup.py.in")
+set(SETUP_PY "${CMAKE_CURRENT_BINARY_DIR}/python/setup.py")
+set(SETUP_CFG_IN "${CMAKE_CURRENT_SOURCE_DIR}/python/setup.cfg.in")
+set(SETUP_CFG "${CMAKE_CURRENT_BINARY_DIR}/setup.cfg")
+configure_file(${SETUP_PY_IN} ${SETUP_PY})
+configure_file(${SETUP_CFG_IN} ${SETUP_CFG})
+add_custom_command(
+  OUTPUT
+    "${CMAKE_CURRENT_BINARY_DIR}/build/pytimestamp"
+  COMMAND
+    "${Python3_EXECUTABLE}" ${SETUP_PY} build &&
+     mkdir -p "${CMAKE_CURRENT_BINARY_DIR}/build" &&
+     ${CMAKE_COMMAND} -E touch "${CMAKE_CURRENT_BINARY_DIR}/build/pytimestamp"
+  DEPENDS
+    ${PYSRC} ${SETUP_PY} ${SETUP_CFG} notcurses
+  COMMENT "Building Python wrappers"
+)
+add_custom_target(pymod
+  ALL
+  DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/build/pytimestamp"
+)
+install(CODE "execute_process(COMMAND ${PYTHON} ${SETUP_PY} install)")
 
 # Installation
 install(FILES
@@ -476,3 +498,6 @@ install(TARGETS notcurses
     DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
     COMPONENT Development
 )
+install(
+  CODE
+    "execute_process(COMMAND ${Python3_EXECUTABLE} ${SETUP_PY} install --prefix=${CMAKE_INSTALL_PREFIX} WORKING_DIRECTORY ../python)")

python/setup.cfg.in

@@ -0,0 +1,10 @@
+[nosetests]
+verbosity=1
+detailed-errors=1
+with-coverage=1
+cover-package=nose
+debug=nose.loader
+pdb=1
+pdb-failures=1
+[build_ext]
+library_dirs = '${CMAKE_CURRENT_BINARY_DIR}'

python/setup.py.in

@@ -0,0 +1,15 @@
+from setuptools import setup, find_packages
+import os
+
+def read(fname):
+    return open(os.path.join(os.path.dirname(__file__), fname)).read()
+
+if __name__ == '__main__':
+  setup(name='notcurses',
+    version='${PROJECT_VERSION}',
+    package_dir={ '': '${CMAKE_CURRENT_SOURCE_DIR}/python/src/notcurses' },
+    packages=find_packages('${CMAKE_CURRENT_SOURCE_DIR}/python/src/notcurses'),
+    cffi_modules=['${CMAKE_CURRENT_SOURCE_DIR}/python/src/notcurses/build_notcurses.py:ffibuild'],
+    py_modules=["notcurses"],
+    include_dirs=['${CMAKE_CURRENT_SOURCE_DIR}/include']
+)