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Android: Add guide for compile bundle to Hermes bytecode #117

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Android: Add guide for compile bundle to Hermes bytecode #117

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38 changes: 38 additions & 0 deletions README.md
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Expand Up @@ -171,6 +171,44 @@ And then you can use the following command:
For convenience I recommend adding these thread building commands as npm scripts
to your project.

## Android: Compile bundle to bytecode of Hermes engine

```bash
OS="`uname`"
case $OS in
'Darwin')
OS_BIN='osx-bin'
;;
'Linux')
OS_BIN='linux64-bin'
;;
'WindowsNT')
OS_BIN='win64-bin'
;;
*) ;;

DIR=./android/app/src/main/assets/threads
BUNDLE=$DIR/index.thread.bundle
BUNDLE_PACKAGER_MAP=$DIR/index.thread.bundle.packager.map
BUNDLE_MAP=$DIR/index.thread.bundle.map

react-native bundle \
--dev false --assets-dest ./android/app/src/main/res/ \
--entry-file index.thread.js --platform android \
--bundle-output $BUNDLE \
--sourcemap-output $BUNDLE_PACKAGER_MAP

node_modules/hermes-engine/$OS_BIN/hermesc \
-emit-binary \
-out $BUNDLE_PATH $BUNDLE_PATH \
-O -output-source-map

node_modules/react-native/scripts/compose-source-maps.js $BUNDLE_PACKAGER_MAP $BUNDLE_MAP -o $BUNDLE_MAP
rm $BUNDLE_PACKAGER_MAP
```

This is taken from [`react-native/react.gradle`](https://github.com/facebook/react-native/blob/e8c1eeeb0630d73f106417684762f822ea980d91/react.gradle#L175-L218).

## Example App
Included in this repository is a simple example application demonstrating basic
usage of react-native-threads. Look at `examples/SimpleExample/README.md` for
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