Install extra deps using setuptools.config.read_configuration

.github/workflows/dist-test.yml

@@ -52,7 +52,9 @@ jobs:
         name: 'dists'
         path: dist
     - name: Install pip extras
-      run: pip install -r vidhubcontrol/kivyui/requirements.txt
+      run: |
+        KV_DEPS=$(./tools/get_setup_requires.py -e kivy)
+        pip install "$KV_DEPS"
     - name: Delete source directory
       run: rm -Rf vidhubcontrol
     - name: Install wheel

tools/get_setup_requires.py

@@ -0,0 +1,39 @@
+#! /usr/bin/env python
+
+import argparse
+from pathlib import Path
+from setuptools.config import read_configuration
+
+
+def parse_args():
+    p = argparse.ArgumentParser()
+    p.add_argument(
+        '-c', '--conf-file', dest='conf_file', default='setup.cfg',
+        help='Path to the setup.cfg file to read. Default is "%(default)s"',
+    )
+    p.add_argument(
+        '-e', '--extras', dest='extras',
+        help='Only show "extra" dependencies with the given name',
+    )
+    p.add_argument(
+        '-d', '--delimiter', dest='delimiter', default=' ',
+        help='Character(s) to separate the results. Default is "%(default)s"',
+    )
+    args = p.parse_args()
+    args.conf_file = Path(args.conf_file)
+    return args
+
+def main():
+    args = parse_args()
+    conf = read_configuration(args.conf_file)
+    if args.extras:
+        try:
+            deps = conf['options']['extras_require'][args.extras]
+        except KeyError:
+            return
+    else:
+        deps = conf['options']['install_requires']
+    print(args.delimiter.join(deps))
+
+if __name__ == '__main__':
+    main()