From 6f9824778dc7600e81c6237f9f23a7de82baf04b Mon Sep 17 00:00:00 2001
From: Lucas Azzola <derflatulator@gmail.com>
Date: Sun, 2 Jul 2017 02:11:13 +1000
Subject: [PATCH] Strip BOM before parsing, fixes #2362 (#2373)

---
 index.js                                      |  2 ++
 package.json                                  |  1 +
 .../css_bom/__snapshots__/jsfmt.spec.js.snap  | 19 +++++++++++++++++++
 tests/css_bom/bom.css                         |  8 ++++++++
 tests/css_bom/jsfmt.spec.js                   |  1 +
 5 files changed, 31 insertions(+)
 create mode 100644 tests/css_bom/__snapshots__/jsfmt.spec.js.snap
 create mode 100644 tests/css_bom/bom.css
 create mode 100644 tests/css_bom/jsfmt.spec.js

diff --git a/index.js b/index.js
index 166cb11b6..ab22b25c1 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,6 @@
 "use strict";
 
+const stripBom = require("strip-bom");
 const comments = require("./src/comments");
 const version = require("./package.json").version;
 const printAstToDoc = require("./src/printer").printAstToDoc;
@@ -54,6 +55,7 @@ function ensureAllCommentsPrinted(astComments) {
 }
 
 function formatWithCursor(text, opts, addAlignmentSize) {
+  text = stripBom(text);
   addAlignmentSize = addAlignmentSize || 0;
 
   const ast = parser.parse(text, opts);
diff --git a/package.json b/package.json
index 367536f22..61b5cd5a8 100644
--- a/package.json
+++ b/package.json
@@ -51,6 +51,7 @@
     "rollup-plugin-node-resolve": "2.0.0",
     "rollup-plugin-replace": "1.1.1",
     "shelljs": "0.7.8",
+    "strip-bom": "3.0.0",
     "sw-toolbox": "3.6.0",
     "uglify-es": "3.0.15",
     "webpack": "2.6.1"
diff --git a/tests/css_bom/__snapshots__/jsfmt.spec.js.snap b/tests/css_bom/__snapshots__/jsfmt.spec.js.snap
new file mode 100644
index 000000000..ede957ff9
--- /dev/null
+++ b/tests/css_bom/__snapshots__/jsfmt.spec.js.snap
@@ -0,0 +1,19 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`bom.css 1`] = `
+
+
+/* Block comment */
+
+html {
+  content: "#{1}";
+
+}
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+/* Block comment */
+
+html {
+  content: "#{1}";
+}
+
+`;
diff --git a/tests/css_bom/bom.css b/tests/css_bom/bom.css
new file mode 100644
index 000000000..54a6e7f65
--- /dev/null
+++ b/tests/css_bom/bom.css
@@ -0,0 +1,8 @@
+
+
+/* Block comment */
+
+html {
+  content: "#{1}";
+
+}
diff --git a/tests/css_bom/jsfmt.spec.js b/tests/css_bom/jsfmt.spec.js
new file mode 100644
index 000000000..a7d303b6c
--- /dev/null
+++ b/tests/css_bom/jsfmt.spec.js
@@ -0,0 +1 @@
+run_spec(__dirname, { parser: "postcss" });