Add --quiet option; resolves #210

CHANGES.md

@@ -5,6 +5,7 @@
 ### New features
 - When calling `set-default`, you can now pass `--allow-undefined` to set the
   default to a version that doesn't exist yet
+- Add global-level `-q` / `--quiet` option to suppress warning messages
 
 ### Bug fixes
 - When loading an MkDocs config, mike now runs the `startup` and `shutdown`

mike/driver.py

@@ -1,6 +1,7 @@
 import json
 import os
 import sys
+import warnings
 from contextlib import contextmanager
 
 from . import arguments
@@ -77,6 +78,10 @@
 """
 
 
+def showwarning(message, category, filename, lineno, file=None, line=None):
+    sys.stderr.write('warning: {}\n'.format(message))
+
+
 def add_git_arguments(parser, *, commit=True, deploy_prefix=True):
     # Add this whenever we add git arguments since we pull the remote and
     # branch from mkdocs.yml.
@@ -174,16 +179,16 @@ def check_remote_status(args, strict=False):
             raise ValueError(str(e) + "\n  If you're sure this is intended, " +
                              'retry with --ignore-remote-status')
         else:
-            sys.stderr.write('warning: {}\n'.format(e))
+            warnings.warn(e)
 
 
 @contextmanager
 def handle_empty_commit():
     try:
         yield
     except git_utils.GitEmptyCommit as e:
-        sys.stderr.write(('warning: {}\n  To create a commit anyway, retry ' +
-                          'with --allow-empty\n').format(e))
+        warnings.warn(('{}\n  To create a commit anyway, retry with ' +
+                       '--allow-empty').format(e))
 
 
 def deploy(parser, args):
@@ -198,7 +203,7 @@ def deploy(parser, args):
                              deploy_prefix=args.deploy_prefix,
                              set_props=args.set_props or []), \
              mkdocs_utils.inject_plugin(args.config_file) as config_file:
-            mkdocs_utils.build(config_file, args.version)
+            mkdocs_utils.build(config_file, args.version, quiet=args.quiet)
         if args.push:
             git_utils.push_branch(args.remote, args.branch)
 
@@ -327,12 +332,16 @@ def generate_completion(parser, args):
 
 
 def main():
+    warnings.showwarning = showwarning
+
     parser = arguments.ArgumentParser(prog='mike', description=description)
     subparsers = parser.add_subparsers(metavar='COMMAND')
     subparsers.required = True
 
     parser.add_argument('--version', action='version',
                         version='%(prog)s ' + app_version)
+    parser.add_argument('-q', '--quiet', action='store_true',
+                        help='silence warnings')
     parser.add_argument('--debug', action='store_true',
                         help='report extra information for debugging mike')
 
@@ -460,6 +469,9 @@ def main():
                               help='shell type (default: %(default)s)')
 
     args = parser.parse_args()
+    if args.quiet:
+        warnings.filterwarnings('ignore')
+
     try:
         return args.func(parser, args)
     except Exception as e:

mike/mkdocs_utils.py

@@ -71,16 +71,15 @@ def inject_plugin(config_file):
         os.remove(f.name)
 
 
-def build(config_file, version, verbose=True):
+def build(config_file, version, *, quiet=False, output=None):
     command = (
-        ['mkdocs', 'build', '--clean'] +
+        ['mkdocs'] + (['--quiet'] if quiet else []) + ['build', '--clean'] +
         (['--config-file', config_file] if config_file else [])
     )
 
     env = os.environ.copy()
     env[docs_version_var] = version
 
-    output = None if verbose else subprocess.DEVNULL
     subprocess.run(command, check=True, env=env, stdout=output, stderr=output)
 
 

test/integration/test_set_default.py

@@ -118,6 +118,14 @@ def test_no_changes(self):
         ))
         self.assertEqual(git_utils.get_latest_commit('gh-pages'), rev)
 
+    def test_no_changes_quiet(self):
+        self._deploy()
+        assertPopen(['mike', 'set-default', '1.0'])
+        rev = git_utils.get_latest_commit('gh-pages')
+        assertOutput(self, ['mike', '--quiet', 'set-default', '1.0'],
+                     stdout='', stderr='')
+        self.assertEqual(git_utils.get_latest_commit('gh-pages'), rev)
+
     def test_remote_empty(self):
         stage_dir('set_default_clone')
         check_call_silent(['git', 'clone', self.stage, '.'])

test/unit/test_mkdocs_utils.py

@@ -1,4 +1,5 @@
 import os
+import subprocess
 import unittest
 import yaml
 from io import StringIO
@@ -192,7 +193,7 @@ class TestBuild(unittest.TestCase):
     def test_build(self):
         self.stage = stage_dir('build')
         copytree(os.path.join(test_data_dir, 'basic_theme'), self.stage)
-        mkdocs_utils.build('mkdocs.yml', '1.0', verbose=False)
+        mkdocs_utils.build('mkdocs.yml', '1.0', output=subprocess.DEVNULL)
 
         self.assertTrue(os.path.exists('site/index.html'))
 
@@ -205,7 +206,7 @@ def test_build_directory(self):
         # responsible for).
         with pushd(this_dir):
             mkdocs_utils.build(os.path.join(self.stage, 'mkdocs.yml'),
-                               '1.0', verbose=False)
+                               '1.0', output=subprocess.DEVNULL)
 
         self.assertTrue(os.path.exists('site/index.html'))