fix: win32 binary path fix

* win32 binary path fix

* cleaned up for prettier

* Better performance

Creation different functions are better than check OS inside one filter function for every record.

closes #24

Author: cmosgh

src/util/MongoBinaryDownload.js

@@ -68,7 +68,8 @@ export default class MongoBinaryDownload {
   }
 
   async getMongodPath(): Promise<string> {
-    const mongodPath = path.resolve(this.downloadDir, this.version, 'mongod');
+    const binaryName = this.platform === 'win32' ? 'mongod.exe' : 'mongod';
+    const mongodPath = path.resolve(this.downloadDir, this.version, binaryName);
     if (this.locationExists(mongodPath)) {
       return mongodPath;
     }
@@ -115,20 +116,27 @@ export default class MongoBinaryDownload {
   }
 
   async extract(mongoDBArchive: string): Promise<string> {
+    const binaryName = this.platform === 'win32' ? 'mongod.exe' : 'mongod';
     const extractDir = path.resolve(this.downloadDir, this.version);
     this.debug(`extract(): ${extractDir}`);
     await fs.ensureDir(extractDir);
+
+    const filter =
+      this.platform === 'win32'
+        ? file => /bin\/mongod.exe$/.test(file.path)
+        : file => /bin\/mongod$/.test(file.path);
+
     await decompress(mongoDBArchive, extractDir, {
       // extract only `bin/mongod` file
-      filter: file => /bin\/mongod$/.test(file.path),
+      filter,
       // extract to root folder
       map: file => {
         file.path = path.basename(file.path); // eslint-disable-line
         return file;
       },
     });
 
-    if (!this.locationExists(path.resolve(this.downloadDir, this.version, 'mongod'))) {
+    if (!this.locationExists(path.resolve(this.downloadDir, this.version, binaryName))) {
       throw new Error(`MongoBinaryDownload: missing mongod binary in ${mongoDBArchive}`);
     }
     return extractDir;