Hermes binary bundle deleted after upload

[rcstanciu]

Steps to Reproduce

1. Enable Hermes in Android native project
2. Create and upload bundle using CodePush:

appcenter codepush release-react -a <app_name> \
-d Staging \ 
--target-binary-version=$npm_package_version \
-m \
--output-dir .

Expected Behavior

I specifically set --output-dir . as I want to upload the resulting bundle and sourcemap to Bugsnag. I expect, after running release-react command to find the binary bundle and the sourcemap in current directory.

Actual Behavior

CodePush creates a CodePush directory in current directory, where I can find the JS bundle and sourcemap (index.android.bundle and index.android.bundle.map), the binary sourcemap (index.android.bundle.hbc.map) but no binary bundle (which I expect to be index.android.bundle.hbc).

I watched the directory, as CodePush was creating the bundles, and I saw that the file gets created but disappears immediately (moved/deleted?), possibly when starting the upload. These are the logs:

Running "react-native bundle" command:

node node_modules/.bin/react-native bundle --assets-dest CodePush --bundle-output CodePush/index.android.bundle --dev false --entry-file index.js --platform android --sourcemap-output CodePush/index.android.bundle.map
Welcome to React Native!
                Learn once, write anywhere

info Writing bundle output to:, CodePush/index.android.bundle
info Writing sourcemap output to:, CodePush/index.android.bundle.map
info Done writing bundle output
info Done writing sourcemap output
info Copying 196 asset files
info Done copying assets
Converting JS bundle to byte code via Hermes, running command:

node_modules/hermes-engine/osx-bin/hermes -emit-binary -out CodePush/index.android.bundle.hbc CodePush/index.android.bundle -output-source-map -w

Releasing update contents to CodePush:

Successfully released an update containing the "CodePush" directory to the "Staging" deployment of the "MyApp-Android" app.

Environment

• react-native-code-push version: 6.2.0
• react-native version: 0.62.2
• appcenter-cli: 2.6.0

[rcstanciu]

I've checked the source code of appcenter-cli and I found that this is the expected behavior: the HBC build overrides the JS build. Here is the actual code reference:

https://github.com/microsoft/appcenter-cli/blob/2777a4c682f16ae9422f5b05ea0d945e4061a5f8/src/commands/codepush/lib/react-native-utils.ts#L384

I will close this now as this is not an issue anymore.

Still, this build/sourcemap cannot be used with Bugsnag because, as I've been explained here bugsnag/bugsnag-react-native#463 (comment), the sourcemap is rendered in binary format when building through CodePush.