Validate component usage (#23037)

* Update manifest validator

* Update circle

* Update text

* Typo

* fix link to codeowners

* Merge CODEOWNERS into hassfest

* Annotate errors with fixable

* Convert error to warning

* Lint

* Make abs path

* Python 3.5...

* Typo

* Fix tests

script/hassfest/manifest.py

@@ -0,0 +1,40 @@
+"""Manifest validation."""
+from typing import Dict
+
+import voluptuous as vol
+from voluptuous.humanize import humanize_error
+
+from .model import Integration
+
+
+MANIFEST_SCHEMA = vol.Schema({
+    vol.Required('domain'): str,
+    vol.Required('name'): str,
+    vol.Required('documentation'): str,
+    vol.Required('requirements'): [str],
+    vol.Required('dependencies'): [str],
+    vol.Required('codeowners'): [str],
+})
+
+
+def validate_manifest(integration: Integration):
+    """Validate manifest."""
+    try:
+        MANIFEST_SCHEMA(integration.manifest)
+    except vol.Invalid as err:
+        integration.add_error(
+            'manifest',
+            "Invalid manifest: {}".format(
+                humanize_error(integration.manifest, err)))
+        integration.manifest = None
+        return
+
+    if integration.manifest['domain'] != integration.path.name:
+        integration.add_error('manifest', 'Domain does not match dir name')
+
+
+def validate(integrations: Dict[str, Integration], config):
+    """Handle all integrations manifests."""
+    for integration in integrations.values():
+        if integration.manifest:
+            validate_manifest(integration)