chore: prepare sample apps for new and old arch

Author: Riccardo Cipolleschi

Migration.md

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+# Migration to the New Architecture
+
+This file is a tracker for what has been done to work on the migration of this library and to keep also track of the various todo:
+
+## TODO
+
+- [] Write JS spec in Flow for the New Architecture
+- [] Implent the new Native Code on iOS
+- [] Implent the new Native Code on Android
+- [] Test on OldArch app (iOS)
+- [] Test on OldArch app (Android)
+- [] Test on NewArch app (iOS)
+- [] Test on NewArch app (Android)
+- [] Open PR
+
+## Done
+
+### Setup
+1. Forked and cloned the repo
+1. Checked the list of APIs to migrate.
+1. Created an `OldArch` app (0.70) configured for the Old Architecture.
+1. Run the app to make sure that it works properly.
+1. Created a `NewArch` app (0.70) configured for the New Architecture.
+1. Switched the flags for iOS and Android to have the new arch enabled by default
+1. Run the app to make sure that it works properly.
+1. Moved the apps in the `examples` folder
+
+### Installing blob-utils
+1. Move to `OldArch`
+1. Run `yarn add ../..` to install the blob utils.
+1. `cd ios`
+1. `bundle install && bundle exec pod install`
+1. `cd ..`
+1. `npx react-native run-ios`
+1. Copy the app JS code from `examples/ReactNativeBlobUtil/App.js` to `examples/OldArch/App.js`
+1. Fixed various JS issues
+1. The app depends on the `Picker`. *Note:* It does not support the New Arch, we need to figure out another way to choose.
+    1. run `yarn add @react-native-picker/picker`
+    1. run `bundle exec pod install` from the iOS folder
+    1. re-run the app
+1. Repeat the above steps for `NewArch`

examples/NewArch/.buckconfig

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+
+[android]
+  target = Google Inc.:Google APIs:23
+
+[maven_repositories]
+  central = https://repo1.maven.org/maven2

examples/NewArch/.bundle/config

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+BUNDLE_PATH: "vendor/bundle"
+BUNDLE_FORCE_RUBY_PLATFORM: 1

examples/NewArch/.eslintrc.js

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+module.exports = {
+  root: true,
+  extends: '@react-native-community',
+};

examples/NewArch/.flowconfig

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+[ignore]
+; We fork some components by platform
+.*/*[.]android.js
+
+; Ignore "BUCK" generated dirs
+<PROJECT_ROOT>/\.buckd/
+
+; Ignore polyfills
+node_modules/react-native/Libraries/polyfills/.*
+
+; Flow doesn't support platforms
+.*/Libraries/Utilities/LoadingView.js
+
+.*/node_modules/resolve/test/resolver/malformed_package_json/package\.json$
+
+[untyped]
+.*/node_modules/@react-native-community/cli/.*/.*
+
+[include]
+
+[libs]
+node_modules/react-native/interface.js
+node_modules/react-native/flow/
+
+[options]
+emoji=true
+
+exact_by_default=true
+
+format.bracket_spacing=false
+
+module.file_ext=.js
+module.file_ext=.json
+module.file_ext=.ios.js
+
+munge_underscores=true
+
+module.name_mapper='^react-native/\(.*\)$' -> '<PROJECT_ROOT>/node_modules/react-native/\1'
+module.name_mapper='^@?[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\|pdf\)$' -> '<PROJECT_ROOT>/node_modules/react-native/Libraries/Image/RelativeImageStub'
+
+suppress_type=$FlowIssue
+suppress_type=$FlowFixMe
+suppress_type=$FlowFixMeProps
+suppress_type=$FlowFixMeState
+
+[lints]
+sketchy-null-number=warn
+sketchy-null-mixed=warn
+sketchy-number=warn
+untyped-type-import=warn
+nonstrict-import=warn
+deprecated-type=warn
+unsafe-getters-setters=warn
+unnecessary-invariant=warn
+
+[strict]
+deprecated-type
+nonstrict-import
+sketchy-null
+unclear-type
+unsafe-getters-setters
+untyped-import
+untyped-type-import
+
+[version]
+^0.182.0

examples/NewArch/.gitignore

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+# OSX
+#
+.DS_Store
+
+# Xcode
+#
+build/
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata
+*.xccheckout
+*.moved-aside
+DerivedData
+*.hmap
+*.ipa
+*.xcuserstate
+ios/.xcode.env.local
+
+# Android/IntelliJ
+#
+build/
+.idea
+.gradle
+local.properties
+*.iml
+*.hprof
+.cxx/
+
+# node.js
+#
+node_modules/
+npm-debug.log
+yarn-error.log
+
+# BUCK
+buck-out/
+\.buckd/
+*.keystore
+!debug.keystore
+
+# fastlane
+#
+# It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
+# screenshots whenever they are needed.
+# For more information about the recommended setup visit:
+# https://docs.fastlane.tools/best-practices/source-control/
+
+**/fastlane/report.xml
+**/fastlane/Preview.html
+**/fastlane/screenshots
+**/fastlane/test_output
+
+# Bundle artifact
+*.jsbundle
+
+# Ruby / CocoaPods
+/ios/Pods/
+/vendor/bundle/

examples/NewArch/.node-version

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+16

examples/NewArch/.prettierrc.js

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+module.exports = {
+  arrowParens: 'avoid',
+  bracketSameLine: true,
+  bracketSpacing: false,
+  singleQuote: true,
+  trailingComma: 'all',
+};

examples/NewArch/.ruby-version

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+2.7.5

examples/NewArch/.watchmanconfig

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+{}