Packaged everything up as a Datasette plugin

I used a variant on the pattern described here to run "npm run build" when
creating the wheel:

http://cra.mr/2014/12/19/distributing-js-with-python

To generate just the static assets (in datasette_vega/static) run this:

	python3 setup.py build_static

To build the package (and automatically run the above) do this:

	python3 setup.py bdist_wheel

.gitignore

@@ -22,3 +22,5 @@ dist
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+
+static

datasette_vega/__init__.py

@@ -0,0 +1,11 @@
+from datasette import hookimpl
+
+
+@hookimpl
+def extra_css_urls():
+    return ["/-/static-plugins/datasette_vega/datasette-vega.css"]
+
+
+@hookimpl
+def extra_js_urls():
+    return ["/-/static-plugins/datasette_vega/datasette-vega.js"]

setup.py

@@ -0,0 +1,66 @@
+from distutils.core import Command
+from setuptools import setup
+from subprocess import check_output
+from wheel.bdist_wheel import bdist_wheel
+import os
+
+VERSION = '0.1'
+ROOT = os.path.dirname(os.path.abspath(__file__))
+
+
+def get_long_description():
+    with open(os.path.join(
+        os.path.dirname(os.path.abspath(__file__)), 'README.md'
+    ), encoding='utf8') as fp:
+        return fp.read()
+
+
+class BdistWheelWithBuildStatic(bdist_wheel):
+    def run(self):
+        self.run_command('build_static')
+        return bdist_wheel.run(self)
+
+
+class BuildStatic(Command):
+    user_options = []
+
+    def initialize_options(self):
+        pass
+
+    def finalize_options(self):
+        pass
+
+    def run(self):
+        check_output(['npm', 'run', 'build'], cwd=ROOT)
+        check_output(['mkdir', '-p', 'datasette_vega/static'], cwd=ROOT)
+        check_output("mv build/static/js/*.js datasette_vega/static/datasette-vega.js", shell=True, cwd=ROOT)
+        check_output("mv build/static/css/*.css datasette_vega/static/datasette-vega.css", shell=True, cwd=ROOT)
+
+
+setup(
+    name='datasette-vega',
+    description='A Datasette plugin that provides tools for generating charts using Vega',
+    long_description=get_long_description(),
+    long_description_content_type='text/markdown',
+    author='Simon Willison',
+    url='https://github.com/simonw/datasette-vega',
+    license='Apache License, Version 2.0',
+    version=VERSION,
+    packages=['datasette_vega'],
+    entry_points={
+        'datasette': [
+            'cluster_map = datasette_vega'
+        ],
+    },
+    package_data={
+        'datasette_vega': [
+            'static/datasette-vega.js',
+            'static/datasette-vega.css',
+        ],
+    },
+    cmdclass={
+        'bdist_wheel': BdistWheelWithBuildStatic,
+        'build_static': BuildStatic,
+    },
+    install_requires=['datasette']
+)