🐎 Use executable for installation instead of JS

src/ssn/findReleasePath.ts

@@ -1,5 +1,5 @@
 import { Product } from '../interfaces/ISettings';
-import verifyProductName from '../ssn/verify/verifyProductName';
+import verifyProductName from './verify/verifyProductName';
 
 /** For the given release in the given product, returns from which releases we can patch to this release. */
 function getFromList({ product, to: releaseTo}: {product: Product, to: number}) {

src/ssn/getPatch.ts

@@ -7,6 +7,7 @@ import { Product } from '../interfaces/ISettings';
 import { SsnDiffType } from '../interfaces/ISsnFileEntry';
 import extractFileAsStream from './extractFileAsStream';
 import getSolidpkg from './getSolidpkg';
+import launch from './patcher-installer/launch';
 import readSsnFile from './reader/readSsnFile';
 import getFileFromDisks from './streams/getFileFromDisks';
 import verifyPatch from './verify/verifyPatch';
@@ -83,15 +84,15 @@ export default async function getPatch({ product, from, to, sourceDirectory, tar
   //Extract newly added files
   fileEntries.filter((file) => file.diffType === SsnDiffType.NewFile).forEach(async (file) => {
     try {
-      //extract file
-      const fileStream = await getFileFromDisks(diskFilenames, { diskStart: file.diskNumberStart, offset: file.offset, length: file.compressedSize });
-      const fileContents = await extractFileAsStream(file, fileStream);
-
-      //write to disk
+      //create file write stream
       const outputName = path.join(targetDir, file.name);
       await createDirRecursively(path.dirname(outputName));
       const outputStream = fs.createWriteStream(outputName);
-      fileContents.pipe(outputStream);
+
+      //start installation
+      await launch(diskFilenames[file.diskNumberStart], file.offset, file.compressedSize, file.decryptionKeys, outputStream);
+
+      outputStream.close();
     } catch (error) {
       console.error(`Could not extract file "${file.name}"`, error);
     }

src/ssn/patcher-installer/launch.ts

@@ -0,0 +1,26 @@
+import * as childProcess from 'child_process';
+import * as fs from 'fs';
+import * as path from 'path';
+
+const processPath = path.join(__dirname, '../../lib/patcher-installer');
+
+export default function launchProcess(diskFile: string, offset: number, compressedSize: number, decryptionKeys: [number, number, number] | undefined, outputStream: fs.WriteStream) {
+  return new Promise((resolve, reject) => {
+    const parameters = [
+      diskFile,
+      offset,
+      compressedSize,
+    ];
+    if (decryptionKeys !== undefined) {
+      parameters.push(...decryptionKeys);
+    }
+    const spawnedProcess = childProcess.spawn(processPath, parameters.map((value) => value.toString(), { cwd: '.' }));
+
+    spawnedProcess.stdout.pipe(outputStream);
+    //spawnedProcess.stdout.on('data', console.log);
+    spawnedProcess.stdout.on('end', resolve);
+
+    spawnedProcess.stderr.setEncoding('utf8');
+    spawnedProcess.stderr.on('data', reject);
+  });
+}