Fix error when keywords are defined as a list in cfg

When keywords are defined as a list in cfg file the generated
output have errors and breaks metadata generation.

Change-Id: Ie8a5f30d6af1e81ecf3ca40bc94bc460cca38179
Closes-Bug: #1811475

4 files changed, 40 insertions, 3 deletions

diff --git a/pbr/tests/test_core.py b/pbr/tests/test_core.py
index 0ee6f53..ccd14ab 100644
--- a/pbr/tests/test_core.py
+++ b/pbr/tests/test_core.py
@@ -74,7 +74,7 @@ class TestCore(base.BaseTestCase):
 
         self.run_setup('egg_info')
         stdout, _, _ = self.run_setup('--keywords')
-        assert stdout == 'packaging,distutils,setuptools'
+        assert stdout == 'packaging, distutils, setuptools'
 
     def test_setup_py_build_sphinx(self):
         stdout, _, return_code = self.run_setup('build_sphinx')
diff --git a/pbr/tests/test_util.py b/pbr/tests/test_util.py
index 6c490a9..8370bf1 100644
--- a/pbr/tests/test_util.py
+++ b/pbr/tests/test_util.py
@@ -130,3 +130,33 @@ class TestMapFieldsParsingScenarios(base.BaseTestCase):
         kwargs = util.setup_cfg_to_setup_kwargs(config)
 
         self.assertEqual(self.expected_project_urls, kwargs['project_urls'])
+
+
+class TestKeywordsParsingScenarios(base.BaseTestCase):
+
+    scenarios = [
+        ('keywords_list', {
+            'config_text': """
+                [metadata]
+                keywords =
+                    one
+                    two
+                    three
+                """,  # noqa: E501
+            'expected_keywords': ['one', 'two', 'three'],
+            },
+        ),
+        ('inline_keywords', {
+            'config_text': """
+                [metadata]
+                keywords = one, two, three
+                """,  # noqa: E501
+            'expected_keywords': ['one, two, three'],
+        }),
+    ]
+
+    def test_keywords_parsing(self):
+        config = config_from_ini(self.config_text)
+        kwargs = util.setup_cfg_to_setup_kwargs(config)
+
+        self.assertEqual(self.expected_keywords, kwargs['keywords'])
diff --git a/pbr/util.py b/pbr/util.py
index 4c76081..5bb731b 100644
--- a/pbr/util.py
+++ b/pbr/util.py
@@ -146,6 +146,7 @@ MULTI_FIELDS = ("classifiers",
                 "dependency_links",
                 "setup_requires",
                 "tests_require",
+                "keywords",
                 "cmdclass")
 
 # setup() arguments that can have mapping values in setup.cfg
@@ -154,8 +155,7 @@ MAP_FIELDS = ("project_urls",)
 # setup() arguments that contain boolean values
 BOOL_FIELDS = ("use_2to3", "zip_safe", "include_package_data")
 
-
-CSV_FIELDS = ("keywords",)
+CSV_FIELDS = ()
 
 
 def resolve_name(name):
diff --git a/releasenotes/notes/fix-keywords-as-cfg-list-6cadc5141429d7f5.yaml b/releasenotes/notes/fix-keywords-as-cfg-list-6cadc5141429d7f5.yaml
new file mode 100644
index 0000000..215a164
--- /dev/null
+++ b/releasenotes/notes/fix-keywords-as-cfg-list-6cadc5141429d7f5.yaml
@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    Fix error when ``keywords`` argument as a cfg list. Previously `keywords` are
+    considered as ``CSV_FIELDS`` and with these changes `keywords` are
+    now ``MULTI_FIELDS``. Refer to https://bugs.launchpad.net/pbr/+bug/1811475
+    for further reading.