fix: /usr/bin/file can return errors on MacOS; ignore these errors (#13)

Co-authored-by: Andrew Plotkin <zarf@ZarfLent.local>

README.md

@@ -2,7 +2,7 @@
 
 > Create universal macOS Electron applications
 
-[![CircleCI](https://circleci.com/gh/electron/universal.svg?style=svg)](https://circleci.com/gh/electron/universal)
+[![CircleCI](https://circleci.com/gh/electron/universal/tree/master.svg?style=svg)](https://circleci.com/gh/electron/universal)
 
 
 ## Usage
@@ -33,4 +33,4 @@ your x64 and arm64 apps work in isolation the Universal app will work as well.
 
 #### How do I build my app for Apple silicon in the first place?
 
-Check out the [Electron Apple silicon blog post](https://www.electronjs.org/blog/apple-silicon)
+Check out the [Electron Apple silicon blog post](https://www.electronjs.org/blog/apple-silicon)

src/file-utils.ts

@@ -1,4 +1,4 @@
-import { spawn } from '@malept/cross-spawn-promise';
+import { spawn, ExitCodeError } from '@malept/cross-spawn-promise';
 import * as fs from 'fs-extra';
 import * as path from 'path';
 
@@ -34,7 +34,16 @@ export const getAllAppFiles = async (appPath: string): Promise<AppFile[]> => {
     if (info.isFile()) {
       let fileType = AppFileType.PLAIN;
 
-      const fileOutput = await spawn('file', ['--brief', '--no-pad', p]);
+      var fileOutput = '';
+      try {
+        fileOutput = await spawn('file', ['--brief', '--no-pad', p]);
+      } catch (e) {
+        if (e instanceof ExitCodeError) {
+          /* silently accept error codes from "file" */
+        } else {
+          throw e;
+        }
+      }
       if (p.includes('app.asar')) {
         fileType = AppFileType.APP_CODE;
       } else if (fileOutput.startsWith(MACHO_PREFIX)) {

src/sha.ts

@@ -5,11 +5,12 @@ import { d } from './debug';
 export const sha = async (filePath: string) => {
   d('hashing', filePath);
   const hash = crypto.createHash('sha256');
+  hash.setEncoding('hex');
   const fileStream = fs.createReadStream(filePath);
   fileStream.pipe(hash);
   await new Promise((resolve, reject) => {
     fileStream.on('end', () => resolve());
     fileStream.on('error', (err) => reject(err));
   });
-  return hash.digest('hex');
+  return hash.read();
 };

yarn.lock

@@ -2075,9 +2075,9 @@ inherits@2, inherits@^2.0.1, inherits@^2.0.3, inherits@^2.0.4, inherits@~2.0.1,
   integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
 
 ini@^1.3.4, ini@^1.3.5, ini@~1.3.0:
-  version "1.3.5"
+  version "1.3.8"
-  resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.5.tgz#eee25f56db1c9ec6085e0c22778083f596abf927"
+  resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.8.tgz#a29da425b48806f34767a4efce397269af28432c"
-  integrity sha512-RZY5huIKCMRWDUqZlEi72f/lmXKMvuszcMBduliQ3nnWbx9X/ZBQO7DijMEYS9EhHBb2qacRUMtC7svLwe0lcw==
+  integrity sha512-JV/yugV2uzW5iMRSiZAyDtQd+nxtUnjeLt0acNdw98kKLrvuRVyB80tsREOE7yvGVgalhZ6RNXCmEHkUKBKxew==
 
 init-package-json@^1.10.3:
   version "1.10.3"
@@ -4404,9 +4404,9 @@ sshpk@^1.7.0:
     tweetnacl "~0.14.0"
 
 ssri@^6.0.0, ssri@^6.0.1:
-  version "6.0.1"
+  version "6.0.2"
-  resolved "https://registry.yarnpkg.com/ssri/-/ssri-6.0.1.tgz#2a3c41b28dd45b62b63676ecb74001265ae9edd8"
+  resolved "https://registry.yarnpkg.com/ssri/-/ssri-6.0.2.tgz#157939134f20464e7301ddba3e90ffa8f7728ac5"
-  integrity sha512-3Wge10hNcT1Kur4PDFwEieXSCMCJs/7WvSACcrMYrNp+b8kDL1/0wJch5Ni2WrtwEa2IO8OsVfeKIciKCDx/QA==
+  integrity sha512-cepbSq/neFK7xB6A50KHN0xHDotYzq58wWCa5LeWqnPrHG8GzfEjO/4O8kpmcGW+oaxkvhEJCWgbgNk4/ZV93Q==
   dependencies:
     figgy-pudding "^3.5.1"
 
@@ -5043,9 +5043,9 @@ xtend@~4.0.1:
   integrity sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==
 
 y18n@^3.2.1:
-  version "3.2.1"
+  version "3.2.2"
-  resolved "https://registry.yarnpkg.com/y18n/-/y18n-3.2.1.tgz#6d15fba884c08679c0d77e88e7759e811e07fa41"
+  resolved "https://registry.yarnpkg.com/y18n/-/y18n-3.2.2.tgz#85c901bd6470ce71fc4bb723ad209b70f7f28696"
-  integrity sha1-bRX7qITAhnnA136I53WegR4H+kE=
+  integrity sha512-uGZHXkHnhF0XeeAPgnKfPv1bgKAYyVvmNL1xlKsPYZPaIHxGti2hHqvOCQv71XMsLxu1QjergkqogUnms5D3YQ==
 
 y18n@^4.0.0:
   version "4.0.0"