fix: guess line ending before preprocess

src/main/core.js

@@ -71,6 +71,8 @@ function coreFormat(text, opts, addAlignmentSize) {
 
   const parsed = parser.parse(text, opts);
   const ast = parsed.ast;
+
+  const originalText = text;
   text = parsed.text;
 
   if (opts.cursorOffset >= 0) {
@@ -82,7 +84,7 @@ function coreFormat(text, opts, addAlignmentSize) {
 
   const astComments = attachComments(text, ast, opts);
   const doc = printAstToDoc(ast, opts, addAlignmentSize);
-  opts.newLine = guessLineEnding(text);
+  opts.newLine = guessLineEnding(originalText);
 
   const result = printDocToString(doc, opts);
 

tests_integration/__tests__/__snapshots__/format.js.snap

@@ -1,6 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`yaml parser should handle CRLF correctly 1`] = `
-"a: 123
-"
-`;
+exports[`yaml parser should handle CRLF correctly 1`] = `"\\"a: 123\\\\r\\\\n\\""`;

tests_integration/__tests__/format.js

@@ -4,5 +4,8 @@ const prettier = require("prettier/local");
 
 test("yaml parser should handle CRLF correctly", () => {
   const input = "a:\r\n  123\r\n";
-  expect(prettier.format(input, { parser: "yaml" })).toMatchSnapshot();
+  expect(
+    // use JSON.stringify to observe CRLF
+    JSON.stringify(prettier.format(input, { parser: "yaml" }))
+  ).toMatchSnapshot();
 });