Use quotation style from the input code (#705)

.changeset/cuddly-games-burn.md

@@ -0,0 +1,5 @@
+---
+"aws-sdk-js-codemod": patch
+---
+
+Use quotation style from the input code

src/transforms/v2-to-v3/__fixtures__/misc/single-quote.input.js

@@ -0,0 +1,3 @@
+import AWS from 'aws-sdk';
+
+const client = new AWS.DynamoDB();

src/transforms/v2-to-v3/__fixtures__/misc/single-quote.output.js

@@ -0,0 +1,3 @@
+import { DynamoDB } from '@aws-sdk/client-dynamodb';
+
+const client = new DynamoDB();

src/transforms/v2-to-v3/transformer.ts

@@ -31,7 +31,7 @@ import {
   removeGlobalModule,
 } from "./modules";
 import { replaceTSTypeReference } from "./ts-type";
-import { isTypeScriptFile } from "./utils";
+import { getMostUsedStringLiteralQuote, isTypeScriptFile } from "./utils";
 
 const transformer = async (file: FileInfo, api: API) => {
   const j = isTypeScriptFile(file.path) ? api.jscodeshift.withParser("ts") : api.jscodeshift;
@@ -70,6 +70,9 @@ const transformer = async (file: FileInfo, api: API) => {
     return source.toSource();
   }
 
+  // Compute recast options before doing transformations
+  const quote = getMostUsedStringLiteralQuote(j, source);
+
   const awsGlobalConfig = getAwsGlobalConfig(j, source, v2GlobalName);
   for (const [v2ClientName, v3ClientMetadata] of Object.entries(clientMetadataRecord)) {
     const clientIdentifiers = clientIdentifiersRecord[v2ClientName];
@@ -103,7 +106,7 @@ const transformer = async (file: FileInfo, api: API) => {
   replaceAwsUtilFunctions(j, source, v2GlobalName);
   removeGlobalModule(j, source, v2GlobalName);
 
-  return source.toSource();
+  return source.toSource({ quote });
 };
 
 export default transformer;

src/transforms/v2-to-v3/utils/getMostUsedStringLiteralQuote.ts

@@ -0,0 +1,37 @@
+import { Collection, JSCodeshift } from "jscodeshift";
+
+export enum StringLiteralQuoteType {
+  SINGLE = "single",
+  DOUBLE = "double",
+}
+
+export const getMostUsedStringLiteralQuote = (
+  j: JSCodeshift,
+  source: Collection<unknown>
+): StringLiteralQuoteType => {
+  const quoteCount: Record<StringLiteralQuoteType, number> = {
+    [StringLiteralQuoteType.SINGLE]: 0,
+    [StringLiteralQuoteType.DOUBLE]: 0,
+  };
+
+  source.find(j.Literal).forEach((path) => {
+    const value = path.node.value;
+
+    // Check if the literal value is a string and contains single quotes
+    if (typeof value === "string") {
+      // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+      // @ts-ignore Property 'raw' does not exist on type 'Literal'.
+      const rawValue = path.node.raw || "";
+      if (rawValue.startsWith("'")) {
+        quoteCount[StringLiteralQuoteType.SINGLE]++;
+      } else if (rawValue.startsWith('"')) {
+        quoteCount[StringLiteralQuoteType.DOUBLE]++;
+      }
+    }
+  });
+
+  if (quoteCount[StringLiteralQuoteType.SINGLE] > quoteCount[StringLiteralQuoteType.DOUBLE]) {
+    return StringLiteralQuoteType.SINGLE;
+  }
+  return StringLiteralQuoteType.DOUBLE;
+};

src/transforms/v2-to-v3/utils/index.ts

@@ -1,3 +1,4 @@
 export * from "./getClientDeepImportPath";
 export * from "./getClientNewExpression";
+export * from "./getMostUsedStringLiteralQuote";
 export * from "./isTypeScriptFile";