chore!: Update to yaml 2 (#44)

BREAKING CHANGE: Some of the options supported by yaml change;
see its documentation for details: https://eemeli.org/yaml

README.md

@@ -42,7 +42,8 @@ file.hello === 'world'
 
 ## Options
 
-In addition to all [`yaml` options](https://eemeli.org/yaml/#options), the loader supports the following additional options:
+In addition to all [`yaml` options](https://eemeli.org/yaml/#options) used by its parsing methods,
+the loader supports the following additional options:
 
 ### `asJSON`
 

index.js

@@ -27,21 +27,27 @@ module.exports = function yamlLoader(src) {
       return next(value)
     })
 
+  const jsOpt = Object.assign({}, options, { onAnchor: addRef })
+  if (asJSON) {
+    jsOpt.json = true
+    jsOpt.mapAsMap = false
+  }
+
   let res
   if (asStream) {
     const stream = YAML.parseAllDocuments(src, options)
     res = []
     for (const doc of stream) {
       for (const warn of doc.warnings) this.emitWarning(warn)
       for (const err of doc.errors) throw err
-      res.push(doc.toJSON(null, addRef))
+      res.push(doc.toJS(jsOpt))
     }
   } else {
     const doc = YAML.parseDocument(src, options)
     for (const warn of doc.warnings) this.emitWarning(warn)
     for (const err of doc.errors) throw err
     if (namespace) doc.contents = doc.getIn(namespace.split('.'))
-    res = doc.toJSON(null, addRef)
+    res = doc.toJS(jsOpt)
   }
 
   if (asJSON) return JSON.stringify(res)

package.json

@@ -37,7 +37,7 @@
   "dependencies": {
     "javascript-stringify": "^2.0.1",
     "loader-utils": "^2.0.0",
-    "yaml": "^1.10.0"
+    "yaml": "^2.0.0"
   },
   "devDependencies": {
     "jest": "^27.5.1",

test/test.js

@@ -7,6 +7,7 @@ describe('aliased objects', () => {
     const res = loader.call(ctx, src)
     expect(res).toBe("var v1 = ['foo'];\nexport default {foo:v1,bar:v1};")
   })
+
   test('document stream', () => {
     const ctx = { query: { asStream: true } }
     const src = 'foo: &foo [foo]\nbar: *foo\n---\nfoo: &foo [foo]\nbar: *foo'
@@ -28,9 +29,7 @@ describe('options.asJSON', () => {
   test('throw error if there is a parse error', () => {
     const ctx = { query: { asJSON: true } }
     const src = '---\nhello: world\nhello: 2'
-    expect(() => loader.call(ctx, src)).toThrow(
-      /^Map keys must be unique; "hello" is repeated/
-    )
+    expect(() => loader.call(ctx, src)).toThrow(/Map keys must be unique/)
   })
 })
 
@@ -64,3 +63,19 @@ describe('options.asStream', () => {
     )
   })
 })
+
+describe('yaml options', () => {
+  test('options.intAsBigInt', () => {
+    const ctx = { query: { intAsBigInt: true } }
+    const res = loader.call(ctx, 'answer: 42')
+    expect(res).toBe("export default {answer:BigInt('42')};")
+  })
+
+  test('options.mapAsMap', () => {
+    const ctx = { query: { mapAsMap: true } }
+    const res = loader.call(ctx, '---\nhello:\n  world: plop')
+    expect(res).toBe(
+      "export default new Map([['hello',new Map([['world','plop']])]]);"
+    )
+  })
+})