Add format as valid child to fields (#62)

* chore: add format as valid child to fields

* use regex format for text input format schema

* add test for text field format

* use json schema draft 7

---------

Co-authored-by: Angus Fretwell <angusfretwell@me.com>

Author: ehenrik

schema.json

@@ -1,6 +1,6 @@
 {
   "title": "JSON schema for Buildkite pipeline configuration files",
-  "$schema": "http://json-schema.org/draft-06/schema#",
+  "$schema": "http://json-schema.org/draft-07/schema#",
   "fileMatch": [
     "buildkite.yml",
     "buildkite.yaml",
@@ -326,6 +326,14 @@
                     "What’s the code name for this release? :name_badge:"
                   ]
                 },
+                "format": {
+                  "type": "string",
+                  "description": "The format must be a regular expression implicitly anchored to the beginning and end of the input and is functionally equivalent to the HTML5 pattern attribute.",
+                  "format": "regex",
+                  "examples": [
+                    "[0-9a-f]+"
+                  ]
+                },
                 "required": {
                   "type": "boolean",
                   "default": true,

test/schema.test.js

@@ -9,7 +9,6 @@ const validate = (name) => {
   const pipeline = yaml.safeLoad(fs.readFileSync(`./valid-pipelines/${name}`, 'utf8'))
 
   const ajv = new Ajv({ allErrors: true })
-  ajv.addMetaSchema(require('ajv/lib/refs/json-schema-draft-06.json'))
   var validate = ajv.compile(schema)
 
   var valid = validate(pipeline)

test/valid-pipelines/input.yml

@@ -1,6 +1,5 @@
 steps:
   # Different nesting formats
-
   - input
 
   - input: "A label"
@@ -17,7 +16,6 @@ steps:
         key: "field-1"
 
   # All the options
-
   - input: "A label"
 
   - input: "A label"
@@ -101,12 +99,24 @@ steps:
           - label: "Option 2"
             value: option-2
 
-# Key formats
-
+  # Text field formats
+  - input: "A label"
+    prompt: "A prompt"
+    fields:
+      - text: "Formatted field 1"
+        key: "formatted-field-1"
+        format: "\\d{4,4}"
+      - text: "Formatted field 2"
+        key: "formatted-field-2"
+        format: "[0-9]{3}"
+      - text: "Formatted field 3"
+        key: "formatted-field-3"
+        format: "[0-9a-f]+"
+
+  # Key formats
   - input: "Tests for key formatting"
     fields:
       # Text fields
-
       - text: "Alphanumeric key, leading characters alpha"
         key: aBc123
       - text: "Alphanumeric key, leading characters numeric"
@@ -123,7 +133,6 @@ steps:
         key: -dasherized-key
 
       # Select fields
-
       - select: "Alphanumeric key, leading characters alpha"
         key: aBc123
         multiple: true