Fix show command

tests/test_cli.py

@@ -218,5 +218,70 @@ class TestRelease(unittest.TestCase):
             self.assertEqual(repo.tags[0].name, '1.0.0')
 
 
+class TestShow(unittest.TestCase):
+
+    # noinspection PyShadowingNames
+    def setUp(self):
+        self.runner = CliRunner()
+        self.location = 'CHANGELOG.md'
+
+        self.log = yaclog.Changelog()
+
+        self.log.add_version(name='1.0.0').add_entry('- entry number 1')
+        self.log.add_version(name='Version 2.0.0').add_entry('- entry number 2', 'Added')
+        self.log.add_version(name='Three Point Oh').add_entry('entry number 3')
+        v = self.log.add_version(name='4.0.0 "Euclid"')
+        v.add_entry('- entry number 4')
+        v.add_entry('- entry number 5')
+        v.tags.append('TAGGED')
+
+        self.modes = {
+            'full': ([], lambda v, k: v.text(**k), '\n\n'),
+            'name': (['-n'], lambda v, k: v.name, '\n'),
+            'body': (['-b'], lambda v, k: v.body(**k), '\n\n'),
+            'header': (['-h'], lambda v, k: v.header(**k), '\n'),
+        }
+
+    def test_show_all(self):
+        """Test showing all version information"""
+
+        with self.runner.isolated_filesystem():
+            self.log.write(self.location)
+
+            for mode, t in self.modes.items():
+                with self.subTest(mode, flags=t[0]):
+                    check_result(self, result := self.runner.invoke(cli, ['show', '-a'] + t[0]))
+                    self.assertEqual(t[2].join([t[1](v, {'md': False}) for v in self.log.versions]),
+                                     result.output.strip(), 'incorrect plaintext output')
+
+                    check_result(self, result := self.runner.invoke(cli, ['show', '-am'] + t[0]))
+                    self.assertEqual(t[2].join([t[1](v, {'md': True}) for v in self.log.versions]),
+                                     result.output.strip(), 'incorrect markdown output')
+
+    def test_show_version(self):
+        with self.runner.isolated_filesystem():
+            self.log.write(self.location)
+
+            for mode, t in self.modes.items():
+                with self.subTest(mode, flags=t[0]):
+
+                    for version in self.log.versions:
+                        check_result(self, result := self.runner.invoke(cli, ['show', version.name] + t[0]))
+                        self.assertEqual(t[1](version, {'md': False}),
+                                         result.output.strip(), 'incorrect plaintext output')
+
+                        check_result(self, result := self.runner.invoke(cli, ['show', version.name[-5:]] + t[0]))
+                        self.assertEqual(t[1](version, {'md': False}),
+                                         result.output.strip(), 'incorrect plaintext output')
+
+                        check_result(self, result := self.runner.invoke(cli, ['show', version.name, '-m'] + t[0]))
+                        self.assertEqual(t[1](version, {'md': True}),
+                                         result.output.strip(), 'incorrect markdown output')
+
+                        check_result(self, result := self.runner.invoke(cli, ['show', version.name[-5:], '-m'] + t[0]))
+                        self.assertEqual(t[1](version, {'md': True}),
+                                         result.output.strip(), 'incorrect markdown output')
+
+
 if __name__ == '__main__':
     unittest.main()

yaclog/changelog.py

@@ -381,14 +381,15 @@ class Changelog:
 
     def get_version(self, name: Optional[str] = None) -> VersionEntry:
         """
-        Get a version from the changelog by name
+        Get a version from the changelog by name.
 
-        :param name: The name of the version to get, or `None` to return the most recent
+        :param name: The name of the version to get, or `None` to return the most recent.
+            The first version with this value in its name is returned.
         :return: The first version with the selected name
         """
 
         for version in self.versions:
-            if version.name == name or name is None:
+            if name in version.name or name is None:
                 return version
         raise KeyError(f'Version {name} not found in changelog')
 

yaclog/cli/__main__.py

@@ -59,24 +59,36 @@ def reformat(obj: Changelog):
     click.echo(f'Reformatted changelog file at {obj.path}')
 
 
+# noinspection PyShadowingNames
 @cli.command(short_help='Show changes from the changelog file')
 @click.option('--all', '-a', 'all_versions', is_flag=True, help='Show the entire changelog.')
 @click.option('--markdown/--txt', '-m/-t', default=False, help='Display as markdown or plain text.')
-@click.option('--full', '-f', 'str_func', flag_value=lambda v, k: v.text(**k), default=True,
+@click.option('--full', '-f', 'mode', flag_value='full', default=True,
               help='Show version header and body.')
-@click.option('--name', '-n', 'str_func', flag_value=lambda v, k: v.name, help='Show only the version name')
-@click.option('--body', '-b', 'str_func', flag_value=lambda v, k: v.body(**k), help='Show only the version body.')
-@click.option('--header', '-h', 'str_func', flag_value=lambda v, k: v.preamble(**k),
+@click.option('--name', '-n', 'mode', flag_value='name',
+              help='Show only the version name')
+@click.option('--body', '-b', 'mode', flag_value='body',
+              help='Show only the version body.')
+@click.option('--header', '-h', 'mode', flag_value='header',
               help='Show only the version header.')
 @click.argument('version_names', metavar='VERSIONS', type=str, nargs=-1)
 @click.pass_obj
-def show(obj: Changelog, all_versions, markdown, str_func, version_names):
+def show(obj: Changelog, all_versions, markdown, mode, version_names):
     """
     Show the changes for VERSIONS.
 
     VERSIONS is a list of versions to print. If not given, the most recent version is used.
     """
 
+    functions = {
+        'full': (lambda v, k: v.text(**k)),
+        'name': (lambda v, k: v.name),
+        'body': (lambda v, k: v.body(**k)),
+        'header': (lambda v, k: v.header(**k)),
+    }
+
+    str_func = functions[mode]
+
     try:
         if all_versions:
             versions = obj.versions
@@ -85,16 +97,14 @@ def show(obj: Changelog, all_versions, markdown, str_func, version_names):
         else:
             versions = [obj.get_version(name) for name in version_names]
     except KeyError as k:
-        raise click.BadArgumentUsage(k)
+        raise click.BadArgumentUsage(str(k))
     except ValueError as v:
-        raise click.ClickException(v)
+        raise click.ClickException(str(v))
 
     kwargs = {'md': markdown, 'color': True}
 
-    for v in versions:
-        text = str_func(v, kwargs)
-        click.echo(text)
-        click.echo('\n')
+    sep = '\n\n' if mode == 'body' or mode == 'full' else '\n'
+    click.echo(sep.join([str_func(v, kwargs) for v in versions]))
 
 
 @cli.command(short_help='Modify version tags')
@@ -115,9 +125,9 @@ def tag(obj: Changelog, add, tag_name: str, version_name: str):
         else:
             version = obj.current_version()
     except KeyError as k:
-        raise click.BadArgumentUsage(k)
+        raise click.BadArgumentUsage(str(k))
     except ValueError as v:
-        raise click.ClickException(v)
+        raise click.ClickException(str(v))
 
     if add:
         version.tags.append(tag_name)
@@ -153,7 +163,7 @@ def entry(obj: Changelog, bullets, paragraphs, section_name, version_name):
         else:
             version = obj.current_version(released=False, new_version=True)
     except KeyError as k:
-        raise click.BadArgumentUsage(k)
+        raise click.BadArgumentUsage(str(k))
 
     for p in paragraphs:
         version.add_entry(p, section_name)