fix: insert imports one line higher

Author: jedwards1211

package.json

@@ -193,6 +193,7 @@
   },
   "dependencies": {
     "@babel/runtime": "^7.8.4",
+    "flow-parser": "^0.117.1",
     "jscodeshift": "^0.7.0",
     "jscodeshift-choose-parser": "^1.0.0",
     "require-glob": "^3.2.0",

src/getExistingImports.ts

@@ -13,11 +13,20 @@ export default function getExistingImports(
 
   let insertLine = 0
 
-  j(text)
+  let root
+  try {
+    root = j(text)
+  } catch (error) {
+    // fall back to trying with flow parser, because it tends to be
+    // very tolerant of errors and we might at least get the import
+    // nodes
+    root = j.withParser('flow')(text)
+  }
+  root
     .find(j.ImportDeclaration)
     .forEach(({ node }: ASTPath<ImportDeclaration>): void => {
       if (!node) return
-      if (node.loc) insertLine = node.loc.end.line + 1
+      if (node.loc) insertLine = node.loc.end.line
       const source = node.source.value
       if (typeof source === 'string' && source.startsWith('@material-ui')) {
         result.add(source)

yarn.lock

@@ -3676,7 +3676,7 @@ flatted@^2.0.0:
   resolved "https://registry.yarnpkg.com/flatted/-/flatted-2.0.1.tgz#69e57caa8f0eacbc281d2e2cb458d46fdb449e08"
   integrity sha512-a1hQMktqW9Nmqr5aktAux3JMNqaucxGcjtjWnZLHX7yyPCmlSV3M54nGYbqT8K+0GhF3NBgmJCc3ma+WOgX8Jg==
 
-flow-parser@0.*:
+flow-parser@0.*, flow-parser@^0.117.1:
   version "0.117.1"
   resolved "https://registry.yarnpkg.com/flow-parser/-/flow-parser-0.117.1.tgz#ad52b866c16fe36a084a73056909731c9d538bdb"
   integrity sha512-ybDdkcZOFw8rkpoLGzNH5xoKp4TrL5Kikrov0K/IFawNC6K8S3czWzxi+e1NJydgNHFZEKrrTcsO/9ftrQToHA==