Add a dummy builder

ref: #11

Author: SilverRainZ

sphinxnotes/snippet/builder.py

@@ -0,0 +1,17 @@
+"""
+    sphinxnotes.snippet.builder
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Dummy builder for triggering extension.
+
+    :copyright: Copyright 2021 Shengyu Zhang.
+    :license: BSD, see LICENSE for details.
+"""
+
+from sphinx.builders.dummy import DummyBuilder
+from sphinx.locale import __
+
+
+class Builder(DummyBuilder):
+    name = 'snippet'
+    epilog = __('The snippet builder is a dummy builder for triggering extension.')

sphinxnotes/snippet/ext.py

@@ -26,6 +26,7 @@
 from .cache import Cache, Item
 from .keyword import Extractor
 from .utils.titlepath import resolve_fullpath, resolve_docpath
+from .builder import Builder
 
 
 logger = logging.getLogger(__name__)
@@ -119,6 +120,8 @@ def on_builder_finished(app:Sphinx, exception) -> None:
 
 
 def setup(app:Sphinx):
+    app.add_builder(Builder)
+
     app.add_config_value('snippet_config', {}, '')
     app.add_config_value('snippet_patterns', {'*':'.*'}, '')