Add JSON schemas

They will be used for validating the morphologies in a future commit.

These were copied from [1], with the following changes:
* The field unpetrify-ref can be of type number in addition to type
  string
* Build commands can be of type boolean in addition to type string
* minItems were set for some fields of type array

[1]: http://git.baserock.org/cgi-bin/cgit.cgi/baserock/baserock/definitions.git/tree/schemas

Change-Id: I962188ad5774472f08b10f6dfff8aac7a106ef23

1 files changed, 60 insertions, 0 deletions

diff --git a/morphlib/schemas/7/system.json-schema b/morphlib/schemas/7/system.json-schema
new file mode 100644
index 00000000..189cc583
--- /dev/null
+++ b/morphlib/schemas/7/system.json-schema
@@ -0,0 +1,60 @@
+$schema: http://json-schema.org/draft-04/schema#
+id: http://git.baserock.org/cgi-bin/cgit.cgi/baserock/baserock/definitions.git/tree/schemas/system.json-schema
+
+description: |
+  This is a JSON-Schema description of a 'system' .morph file, which is part of
+  the Baserock definitions YAML representation format.
+
+  This JSON-Schema file is valid for VERSION 7 of the Baserock definitions
+  YAML serialisation format.
+
+  The Baserock definitions format is the recommended way of representing
+  Baserock definitions on disk. The actual data model is described separately.
+  See https://wiki.baserock.org/definitions for more information.
+
+  This schema is represented as YAML, so that it can be edited more easily.
+  You may need to convert to JSON if using a JSON-Schema tool that expects
+  its input to be an actual string containing data serialised as JSON.
+
+definitions:
+  # In the Baserock data model, this becomes a list of links to StratumArtifact
+  # entities.
+  stratum-reference:
+    type: object
+
+    required: [ 'morph' ]
+    additionalProperties: false
+
+    properties:
+      name: { type: string }
+      morph: { type: string }
+      artifacts:
+        type: array
+        items: { type: string }
+
+
+# Corresponds to System in Baserock data model.
+system:
+type: object
+
+required: [ 'name', 'kind', 'strata' ]
+additionalProperties: false
+
+properties:
+  name: { type: string }
+  kind: { enum: [ "system" ] }
+  description: { type: string }
+
+  # Morph and YBD will only accept certain values for 'arch' based on
+  # hardcoded conditions in those tools.
+  arch: { type: string }
+
+  strata:
+    type: array
+    items:
+      $ref: "#/definitions/stratum-reference"
+    minItems: 1
+
+  configuration-extensions:
+    type: array
+    items: { type: string }