Slight improvements to error reporting

mike/commands.py

@@ -118,7 +118,7 @@ def delete(versions=None, all=False, *, branch='gh-pages', message=None,
             try:
                 removed = all_versions.difference_update(versions)
             except KeyError as e:
-                raise ValueError('version {} does not exist'.format(e))
+                raise ValueError('version {!r} does not exist'.format(e))
 
             for i in removed:
                 if isinstance(i, str):
@@ -137,7 +137,7 @@ def alias(cfg, version, aliases, update_aliases=False, redirect=True,
     try:
         real_version = all_versions.find(version, strict=True)[0]
     except KeyError as e:
-        raise ValueError('version {} does not exist'.format(e))
+        raise ValueError('version {!r} does not exist'.format(e))
 
     if message is None:
         message = (
@@ -190,7 +190,7 @@ def retitle(version, title, *, branch='gh-pages', message=None, prefix=''):
     try:
         all_versions.update(version, title)
     except KeyError:
-        raise ValueError('version {} does not exist'.format(version))
+        raise ValueError('version {!r} does not exist'.format(version))
 
     with git_utils.Commit(branch, message) as commit:
         commit.add_file(versions_to_file_info(all_versions, prefix))
@@ -210,7 +210,7 @@ def set_default(version, template=None, *, branch='gh-pages', message=None,
 
     all_versions = list_versions(branch, prefix)
     if not all_versions.find(version):
-        raise ValueError('version {} does not exist'.format(version))
+        raise ValueError('version {!r} does not exist'.format(version))
 
     t = _redirect_template(template)
     with git_utils.Commit(branch, message) as commit:

mike/driver.py

@@ -308,6 +308,4 @@ def main():
     try:
         return args.func(args)
     except Exception as e:
-        parser.exit(1, '{prog}: {error}\n'.format(
-            prog=parser.prog, error=str(e)
-        ))
+        parser.exit(1, 'error: {}\n'.format(str(e)))

mike/versions.py

@@ -93,7 +93,7 @@ def _ensure_unique_aliases(self, version, aliases, update_aliases=False):
                     )
                 if not update_aliases:
                     raise ValueError(
-                        'alias {!r} already exists for version {}'
+                        'alias {!r} already exists for version {!r}'
                         .format(i, str(key[0]))
                     )
                 removed_aliases.append(key)
@@ -109,7 +109,7 @@ def add(self, version, title=None, aliases=[], update_aliases=False):
             self._data[v].update(title, aliases)
         else:
             if self.find(version):
-                raise ValueError('version {} already exists'.format(version))
+                raise ValueError('version {!r} already exists'.format(version))
             self._data[v] = VersionInfo(version, title, aliases)
 
         # Remove aliases from old versions that we've moved to this version.

test/integration/test_alias.py

@@ -209,7 +209,7 @@ def test_diverged_remote(self):
         check_call_silent(['git', 'fetch', 'origin'])
 
         assertOutput(self, ['mike', 'alias', '1.0', 'latest'], output=(
-            'mike: gh-pages has diverged from origin/gh-pages\n' +
+            'error: gh-pages has diverged from origin/gh-pages\n' +
             '  Pass --ignore to ignore this or --rebase to rebase onto ' +
             'remote\n'
         ), returncode=1)

test/integration/test_delete.py

@@ -173,7 +173,7 @@ def test_diverged_remote(self):
         check_call_silent(['git', 'fetch', 'origin'])
 
         assertOutput(self, ['mike', 'delete', '1.0'], output=(
-            'mike: gh-pages has diverged from origin/gh-pages\n' +
+            'error: gh-pages has diverged from origin/gh-pages\n' +
             '  Pass --ignore to ignore this or --rebase to rebase onto ' +
             'remote\n'
         ), returncode=1)

test/integration/test_deploy.py

@@ -244,7 +244,7 @@ def test_diverged_remote(self):
         check_call_silent(['git', 'fetch', 'origin'])
 
         assertOutput(self, ['mike', 'deploy', '1.0'], output=(
-            'mike: gh-pages has diverged from origin/gh-pages\n' +
+            'error: gh-pages has diverged from origin/gh-pages\n' +
             '  Pass --ignore to ignore this or --rebase to rebase onto ' +
             'remote\n'
         ), returncode=1)

test/integration/test_list.py

@@ -60,7 +60,7 @@ def test_list_version(self):
         self._check_list(['4.0'], '4.0 [dev, latest]\n')
         self._check_list(['stable'], '"3.0.3" (3.0) [stable]\n')
         self._check_list(['nonexist'], '',
-                         'mike: version nonexist does not exist\n', 1)
+                         'error: version nonexist does not exist\n', 1)
 
     def test_list_json(self):
         proc = self._get_list(['-j'])
@@ -94,7 +94,7 @@ def test_from_subdir(self):
             self._check_list(['4.0'] + opts, '4.0 [dev, latest]\n')
             self._check_list(['stable'] + opts, '"3.0.3" (3.0) [stable]\n')
             self._check_list(['nonexist'] + opts, '',
-                             'mike: version nonexist does not exist\n', 1)
+                             'error: version nonexist does not exist\n', 1)
 
             self._check_list(['1.0', '-b', 'gh-pages', '-r', 'origin'],
                              '1.0\n')
@@ -189,4 +189,4 @@ def test_list_version(self):
         self._check_list(['4.0'], '4.0 [dev, latest]\n')
         self._check_list(['stable'], '"3.0.3" (3.0) [stable]\n')
         self._check_list(['nonexist'], '',
-                         'mike: version nonexist does not exist\n', 1)
+                         'error: version nonexist does not exist\n', 1)

test/integration/test_retitle.py

@@ -173,7 +173,7 @@ def test_diverged_remote(self):
         check_call_silent(['git', 'fetch', 'origin'])
 
         assertOutput(self, ['mike', 'retitle', '1.0', '1.0.1'], output=(
-            'mike: gh-pages has diverged from origin/gh-pages\n' +
+            'error: gh-pages has diverged from origin/gh-pages\n' +
             '  Pass --ignore to ignore this or --rebase to rebase onto ' +
             'remote\n'
         ), returncode=1)

test/integration/test_set_default.py

@@ -172,7 +172,7 @@ def test_diverged_remote(self):
         check_call_silent(['git', 'fetch', 'origin'])
 
         assertOutput(self, ['mike', 'set-default', '1.0'], output=(
-            'mike: gh-pages has diverged from origin/gh-pages\n' +
+            'error: gh-pages has diverged from origin/gh-pages\n' +
             '  Pass --ignore to ignore this or --rebase to rebase onto ' +
             'remote\n'
         ), returncode=1)

test/unit/test_versions.py

@@ -135,7 +135,7 @@ def test_add_update_alias(self):
     def test_add_overwrite_alias(self):
         versions = Versions()
         versions.add('1.0', aliases=['latest'])
-        msg = r"alias 'latest' already exists for version 1\.0"
+        msg = r"alias 'latest' already exists for version '1\.0'"
         with self.assertRaisesRegex(ValueError, msg):
             versions.add('2.0', aliases=['latest'])
 
@@ -152,7 +152,7 @@ def test_add_overwrite_version_with_alias(self):
     def test_add_overwrite_alias_with_version(self):
         versions = Versions()
         versions.add('1.0b1', aliases=['1.0'])
-        msg = r'version 1\.0 already exists'
+        msg = r"version '1\.0' already exists"
         with self.assertRaisesRegex(ValueError, msg):
             versions.add('1.0')
         with self.assertRaisesRegex(ValueError, msg):
@@ -213,7 +213,7 @@ def test_update_overwrite_alias_error(self):
         versions.add('1.0', '1.0.0', ['latest'])
         versions.add('2.0', '2.0.0')
 
-        msg = r"alias 'latest' already exists for version 1\.0"
+        msg = r"alias 'latest' already exists for version '1\.0'"
         with self.assertRaisesRegex(ValueError, msg):
             versions.update('2.0', aliases=['latest'])