Thorium-android-app/REPRODUCIBLE_BUILDS.md

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# Reproducible Builds
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Note: reproducible builds work starting version 1.0.45
## Install Docker
Download and install [Docker](https://www.docker.com/).
## Check your Thorium app version and build timestamp
1. Open the Thorium app
2. Go to Settings
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3. Check the app version listed under About 'Version' (e.g., 1.0.44), and record its value to be used later
4. Check the build timestamp under About 'Build Time' (e.g., 1593942384524), and record its value to be used later
## Download the App open-source code
1. Make sure you have `git` installed
2. Clone the Github repository
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3. Checkout the Tag that corresponds to the version of your Thorium app (e.g., 1.0.44)
```shell
git clone https://github.com/sschueller/peertube-android ~/peertube-android
cd ~/peertube-android
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git checkout v1.0.44
```
## Build the project using Docker
1. Build a Docker Image with the required Android Tools
2. Build the App in the Docker Container while specifying the build timestamp that was recorded earlier (e.g., 1593942384524)
3. Copy the freshly-built APK
```shell
cd ~/peertube-android
docker build -t thorium-builder .
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docker run --rm -v ~/Private/peertube:/home/peertube -w /home/peertube thorium-builder gradle assembleRelease -PkeystorePassword=securePassword -PkeyAliasPassword=securePassword -PkeystoreFile=build.keystore -PbuildTimestamp=1593973044091
cp app/build/outputs/apk/release/app-release-unsigned.apk thorium-built.apk
```
## Extract the Play Store APK from your phone
1. Make sure you have `adb` installed
2. Connect your phone to your computer
3. Extract the APK from the phone
```shell
cd ~/peertube-android
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adb shell pm path net.schueller.peertube
adb pull /data/app/net.schueller.peertube-mCeISw_AujlMBHyPfVhdSg==/base.apk thorium-store.apk
```
## Compare the two files
1. Make sure you have `python` installed
2. Use the `apkdiff` script to compare the APKs
```shell
cd ~/peertube-android
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./apkdiff.py thorium-built.apk thorium-store.apk
```