Add iminuit hooks (#26)

iminuit uses a cython module which imports sub-modules. These are not
normally detected by pyinstaller. This hook uses collect_submodules
to add the missing modules as hidden imports, excluding tests.

news/26.new.rst

@@ -0,0 +1 @@
+Add a hook for ``iminuit`` which has hidden imports.

requirements-test.txt

@@ -16,6 +16,7 @@ boto==2.49.0
 boto3==1.12.33
 botocore==1.15.33
 h5py==2.10.0
+iminuit==1.4.0
 markdown==3.2.1
 pendulum==2.0.5
 phonenumbers==8.12.1

src/_pyinstaller_hooks_contrib/hooks/stdhooks/hook-iminuit.py

@@ -0,0 +1,25 @@
+# ------------------------------------------------------------------
+# Copyright (c) 2020 PyInstaller Development Team.
+#
+# This file is distributed under the terms of the GNU General Public
+# License (version 2.0 or later).
+#
+# The full license is available in LICENSE.GPL.txt, distributed with
+# this software.
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+# ------------------------------------------------------------------
+
+# add hooks for iminuit: https://github.com/scikit-hep/iminuit
+
+# iminuit imports subpackages through a cython module which aren't
+# found by default
+
+from PyInstaller.utils.hooks import collect_submodules
+
+hiddenimports = []
+
+# the iminuit package contains tests which aren't needed when distributing
+for mod in collect_submodules('iminuit'):
+    if not mod.startswith('iminuit.tests'):
+        hiddenimports.append(mod)

src/_pyinstaller_hooks_contrib/tests/test_libraries.py

@@ -296,3 +296,10 @@ def test_sentry(pyi_builder):
         import sentry_sdk
         sentry_sdk.init()
         """)
+
+
+@importorskip('iminuit')
+def test_iminuit(pyi_builder):
+    pyi_builder.test_source("""
+        from iminuit import Minuit
+        """)