line-reader -> n-readlines

package.json

@@ -24,25 +24,23 @@
   "dependencies": {
     "@expo/spawn-async": "^1.5.0",
     "@octokit/rest": "^17.9.2",
-    "@types/bluebird": "^3.5.32",
     "@types/commander": "^2.12.2",
     "@types/dot": "^1.1.4",
     "@types/gapi.client.discovery": "^1.0.2",
-    "@types/line-reader": "0.0.29",
     "@types/lodash": "^4.14.152",
     "@types/mocha": "^7.0.2",
+    "@types/n-readlines": "^1.0.1",
     "@types/node": "^12.12.42",
     "@types/request": "2.48.5",
-    "bluebird": "^3.7.2",
     "commander": "^5.1.0",
     "deep-sort-object": "^1.0.2",
     "dot": "^1.1.3",
     "dtslint": "^3.6.9",
     "get-proxy-settings": "^0.1.11",
     "gts": "^2.0.2",
-    "line-reader": "^0.4.0",
     "lodash": "^4.17.15",
     "mocha": "^7.2.0",
+    "n-readlines": "^1.0.0",
     "npm-run-all": "^4.1.5",
     "parse-git-status": "^0.1.0",
     "request": "^2.88.2",

src/app.ts

@@ -3,8 +3,7 @@ import _ from 'lodash';
 import path, {basename, join, resolve} from 'path';
 import request from 'request';
 import sortObject from 'deep-sort-object';
-import lineReader from 'line-reader';
-import {promisify} from 'bluebird';
+import LineByLine from 'n-readlines';
 import {
   ensureDirectoryExists,
   getResourceTypeName,
@@ -24,12 +23,6 @@ export const typingsPrefix = 'gapi.client.';
 export const tmpDirPath = resolve(__dirname, './../.tmp');
 export const revisionPrefix = '// Revision: ';
 
-const eachLine: (
-  ...args: Parameters<LineReader['eachLine']>
-) => Promise<ReturnType<LineReader['eachLine']>> = promisify(
-  lineReader.eachLine
-);
-
 const typesMap: {[key: string]: string} = {
   integer: 'number',
   object: 'any',
@@ -776,30 +769,26 @@ export class App {
     );
 
     ensureDirectoryExists(destinationDirectory);
+    const indexDTSPath = path.join(destinationDirectory, 'index.d.ts');
 
-    if (
-      newRevisionsOnly &&
-      fs.existsSync(path.join(destinationDirectory, 'index.d.ts'))
-    ) {
-      let existingRevision;
-      await eachLine(
-        path.join(destinationDirectory, 'index.d.ts'),
-        {},
-        line => {
-          if (line.startsWith(revisionPrefix)) {
-            const match = line.match(new RegExp(`^${revisionPrefix}(\\d+)$`));
-            if (match !== null && match.length === 2) {
-              existingRevision = Number(match[1]);
-              return false;
-            }
-          }
-          return true;
-        }
-      );
-
+    if (newRevisionsOnly && fs.existsSync(indexDTSPath)) {
       if (!api.revision) {
         return console.error(`There's no revision in JSON: ${api.id}`);
       }
+
+      let existingRevision, line;
+      const liner = new LineByLine(indexDTSPath);
+      while ((line = liner.next())) {
+        line = line.toString();
+        if (line.startsWith(revisionPrefix)) {
+          const match = line.match(new RegExp(`^${revisionPrefix}(\\d+)$`));
+          if (match !== null && match.length === 2) {
+            existingRevision = Number(match[1]);
+            break;
+          }
+        }
+      }
+
       if (!existingRevision) {
         return console.error(
           `Can't find previous revision in index.d.ts: ${api.id}`