Add required-frontmatter plugin.

It doesn't seem to actually do anything. Github issue opened: unmc-vcr/mkdocs-required-frontmatter-plugin#1

mkdocs.yml

@@ -89,6 +89,20 @@ plugins:
       validate_rendered_template: True
   ## Enable offline version of site. Breaks many features.
   # - offline
+  - required-frontmatter:
+      enabled: true
+      required-keys:
+        - tags
+        - a_test_tag
+      ## Disable required frontmatter on specific files/paths
+      exclude:
+        ## All index.md files
+        - index.md
+        ## A path to a directory and file pattern
+        # - example/path/*
+      ## Fail build when page is missing frontmatter & strict: true
+      strict: true
+
 
 markdown_extensions:
   ## Add footnotes to marked-up abbreviations to provide extra context.

pyproject.toml

@@ -8,6 +8,7 @@ authors = [{ name = "redjax", email = "[email protected]" }]
 license = { text = "MIT" }
 dependencies = [
     "markdown-include>=0.8.1",
+    "mkdocs-required-frontmatter-plugin>=0.0.2",
     "mkdocs>=1.6.1",
     "mkdocs-autorefs>=1.2.0",
     "mkdocs-gen-files>=0.5.0",