From 9e7b02d50ec5ea933392466b46da68b4330f0a35 Mon Sep 17 00:00:00 2001
From: Lucas Azzola <derflatulator@gmail.com>
Date: Thu, 15 Jun 2017 20:19:01 +1000
Subject: [PATCH] Print {} in import if it's in the source, fixes #2145 (#2150)

---
 src/printer.js                                |  8 +++++++-
 tests/import/__snapshots__/jsfmt.spec.js.snap | 14 ++++++++++++++
 tests/import/empty-import.js                  |  1 +
 3 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 tests/import/empty-import.js

diff --git a/src/printer.js b/src/printer.js
index a4b82550..ce8ceafb 100644
--- a/src/printer.js
+++ b/src/printer.js
@@ -694,7 +694,13 @@ function genericPrintNoParens(path, options, print, args) {
         }
 
         parts.push(" ", "from ");
-      } else if (n.importKind && n.importKind === "type") {
+      } else if (
+        (n.importKind && n.importKind === "type") ||
+        // import {} from 'x'
+        /{\s*}/.test(
+          options.originalText.slice(util.locStart(n), util.locStart(n.source))
+        )
+      ) {
         parts.push("{} from ");
       }
 
diff --git a/tests/import/__snapshots__/jsfmt.spec.js.snap b/tests/import/__snapshots__/jsfmt.spec.js.snap
index b7055db9..ea75f73c 100644
--- a/tests/import/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/import/__snapshots__/jsfmt.spec.js.snap
@@ -228,6 +228,20 @@ import {
 
 `;
 
+exports[`empty-import.js 1`] = `
+import { } from '@types/googlemaps';
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+import {} from "@types/googlemaps";
+
+`;
+
+exports[`empty-import.js 2`] = `
+import { } from '@types/googlemaps';
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+import {} from "@types/googlemaps";
+
+`;
+
 exports[`inline.js 1`] = `
 import somethingSuperLongsomethingSuperLong from 'somethingSuperLongsomethingSuperLongsomethingSuperLong'
 import {somethingSuperLongsomethingSuperLong} from 'somethingSuperLongsomethingSuperLongsomethingSuperLong'
diff --git a/tests/import/empty-import.js b/tests/import/empty-import.js
new file mode 100644
index 00000000..f08bd786
--- /dev/null
+++ b/tests/import/empty-import.js
@@ -0,0 +1 @@
+import { } from '@types/googlemaps';