chore(Typescript bindings): Fix packaging

.gitignore

@@ -4,3 +4,4 @@
 .DS_Store
 /.mypy_cache
 *.out.*
+/types.ts

package.json

@@ -15,11 +15,11 @@
   "scripts": {
     "format": "npx prettier --write './**/*.{js,json,md,ts,yaml}'",
     "lint": "npx eslint './**/*.{js,ts}' --fix --env node --env es6 --env jest",
-    "test": "jest",
+    "test": "npm run build:jsonschema && jest",
     "build": "npm run build:ts",
-    "build:jsonschema": "gulp jsonschema",
+    "build:jsonschema": "ts-node src/schema.ts",
     "build:jsonld": "gulp jsonld",
-    "build:ts": "ts-node src/typescript.ts",
+    "build:ts": "ts-node src/typescript.ts && tsc && cp built/*.schema.json dist",
     "build:py": "ts-node src/python.ts",
     "build:r": "ts-node src/r.ts",
     "docs": "npm run docs:readme && npm run docs:build",

src/schema.ts

@@ -152,7 +152,9 @@ const processSchema = (schemas: Map<string, Schema>, schema: Schema): void => {
 
       // Add to parent's children
       parent.children =
-        parent.children === undefined ? [title] : [...parent.children, title].sort()
+        parent.children === undefined
+          ? [title]
+          : [...parent.children, title].sort()
 
       // Add to all ancestors' descendants and type enum
       let ancestor: Schema | null = parent
@@ -167,7 +169,10 @@ const processSchema = (schemas: Map<string, Schema>, schema: Schema): void => {
           ancestor.properties.type !== undefined &&
           ancestor.properties.type.enum !== undefined
         ) {
-          ancestor.properties.type.enum = [ancestor.title, ...ancestor.descendants]
+          ancestor.properties.type.enum = [
+            ancestor.title,
+            ...ancestor.descendants
+          ]
         }
         ancestor = parentSchema(schemas, ancestor)
       }

src/typescript.ts

@@ -7,7 +7,7 @@ import path from 'path'
 import { props, read, Schema, types, unions } from './bindings'
 
 /**
- * Generate `dist/types.d.ts` from schemas.
+ * Generate `.../types.ts` from schemas.
  */
 export const build = async (): Promise<string> => {
   const schemas = await read()
@@ -19,22 +19,24 @@ export const build = async (): Promise<string> => {
     .map(unionGenerator)
     .join('')
 
-  const code = `
+  const code = `/* eslint-disable */
+
+/**
+ * This file was automatically generated by ${path.basename(__filename)}.
+ * Do not modify it by hand. Instead, modify the source \`.schema.yaml\` files
+ * in the \`schema\` directory and run \`npm run build:ts\` to regenerate this file.
+ */
+
+${typesInterface(schemas)}
+
 ${typesCode}
 
 ${unionsCode}
 `
-  const dist = path.join(__dirname, '..', 'dist')
-  await fs.ensureDir(dist)
 
-  const file = path.join(dist, 'types.ts')
+  const file = path.join(__dirname, '..', 'types.ts')
   await fs.writeFile(file, code)
 
-  // Create an index.js for require.resolve('@stencila/schema') to work
-  // properly in Encoda
-  // TODO This won't be necessary when using tsc to compile an index.js
-  await fs.writeFile(path.join(dist, 'index.js'), '\n')
-
   return file
 }
 
@@ -44,6 +46,14 @@ ${unionsCode}
 // eslint-disable-next-line @typescript-eslint/no-floating-promises
 if (module.parent === null) build()
 
+/**
+ * Generate a `interface Types`, that maps all types
+ * and can be used to get a type from its name at compile time.
+ */
+export const typesInterface = (schemas: Schema[]): string => {
+  return `export interface Types {\n${schemas.map(({title}) => `  ${title}: ${title}`).join('\n')}\n}`
+}
+
 /**
  * Generate a `interface` and a factory function for each type.
  */