Adapt %%py_dist_name to keep square brackets

So %{py3_dist foo[bar]} works as expected.

Add tests.

macros.python-srpm

@@ -70,7 +70,7 @@
 # Converts Python dist name to a canonical format
 %py_dist_name() %{lua:\
         name = rpm.expand("%{?1:%{1}}");\
-        canonical = string.gsub(string.lower(name), "%W+", "-");\
+        canonical = string.gsub(string.lower(name), "[^%w%[%]]+", "-");\
         print(canonical);\
 }
 

python-rpm-macros.spec

@@ -109,6 +109,7 @@ install -m 644 compileall2.py %{buildroot}%{_rpmconfigdir}/redhat/
 %changelog
 * Wed Jul 08 2020 Miro Hrončok <mhroncok@redhat.com> - 3.9-5
 - Introduce %%python_extras_subpkg
+- Adapt %%py_dist_name to keep square brackets
 - https://fedoraproject.org/wiki/Changes/PythonExtras
 
 * Tue Jun 16 2020 Lumír Balhar <lbalhar@redhat.com> - 3.9-4

tests/test_evals.py

@@ -3,6 +3,8 @@ import subprocess
 import sys
 import textwrap
 
+import pytest
+
 X_Y = f'{sys.version_info[0]}.{sys.version_info[1]}'
 XY = f'{sys.version_info[0]}{sys.version_info[1]}'
 
@@ -24,6 +26,30 @@ def rpm_eval(expression, fails=False, **kwargs):
     return cp.stdout.strip().splitlines()
 
 
+@pytest.mark.parametrize('argument, result', [
+    ('a', 'a'),
+    ('a-a', 'a-a'),
+    ('a_a', 'a-a'),
+    ('a.a', 'a-a'),
+    ('a---a', 'a-a'),
+    ('a-_-a', 'a-a'),
+    ('a-_-a', 'a-a'),
+    ('a[b]', 'a[b]'),
+    ('Aha[Boom]', 'aha[boom]'),
+    ('a.a[b.b]', 'a-a[b-b]'),
+])
+def test_pydist_name(argument, result):
+    assert rpm_eval(f'%py_dist_name {argument}') == [result]
+
+
+def test_py2_dist():
+    assert rpm_eval(f'%py2_dist Aha[Boom] a') == ['python2dist(aha[boom]) python2dist(a)']
+
+
+def test_py3_dist():
+    assert rpm_eval(f'%py3_dist Aha[Boom] a') == ['python3dist(aha[boom]) python3dist(a)']
+
+
 def test_python_provide_python():
     assert rpm_eval('%python_provide python-foo') == []