fix: generate Ruby Bundler config in new projects (#2465)

Author: tido64

.rubocop.yml

@@ -1,4 +1,4 @@
-require:
+plugins:
   - rubocop-minitest
 
 AllCops:

Gemfile.lock

@@ -64,4 +64,4 @@ DEPENDENCIES
   xcodeproj
 
 BUNDLED WITH
-   2.5.14
+   2.6.8

example/.gitignore

@@ -3,6 +3,8 @@
 *.xcworkspace/
 *.zip
 .DS_Store
+.bundle/*
+!.bundle/config
 .gradle/
 .idea/
 .vs/

scripts/configure.mjs

@@ -29,6 +29,7 @@ import {
 import {
   appManifest,
   buildGradle,
+  bundleConfig,
   gradleProperties,
   podfile,
   serialize,
@@ -305,6 +306,7 @@ export const getConfig = (() => {
                     : {
                         "App.js": copyFrom(templateDir, "App.js"),
                       }),
+                  ".bundle/config": bundleConfig(),
                   Gemfile: copyFrom(templateDir, "Gemfile"),
                   "app.json": appManifest(name),
                   "index.js": copyFrom(templateDir, "index.js"),

scripts/template.mjs

@@ -97,6 +97,18 @@ export function buildGradle() {
   );
 }
 
+/**
+ * Returns `.bundle/config`.
+ *
+ * @note We don't use a checked in file because of
+ * https://github.com/ruby/setup-ruby/discussions/576.
+ *
+ * @returns {string}
+ */
+export function bundleConfig() {
+  return join('BUNDLE_PATH: ".bundle"', "BUNDLE_FORCE_RUBY_PLATFORM: 1");
+}
+
 /**
  * @param {number} targetVersion Target React Native version
  * @returns {string}

test/configure/getConfig.test.ts

@@ -45,6 +45,7 @@ describe("getConfig()", () => {
     const config = getConfig(params, "common");
 
     deepEqual(Object.keys(config.files).sort(), [
+      ".bundle/config",
       ".gitignore",
       ".watchmanconfig",
       "App.tsx",