Proton Mail for Android

Copyright (c) 2024 Proton Technologies AG

Contributing

We’ve recently rebuilt the app and are focused on our current roadmap of features and fixes. Therefore, we are not accepting new issues or PRs at the moment: feel free to fork the repo for your own experiments. We appreciate your understanding and support.

Build instructions

• Install and configure the environment (two options available)
  • Android Studio bundle
  • Standalone Android tools
• Install and configure Java 17+ (not needed for Android Studio bundle as it's included)
  • Install Java 17 with brew install openjdk@17 | apt install openjdk-17-jdk
  • Set Java 17 as the current version by using the JAVA_HOME environment variable
• Clone this repository (Use git clone git@github.com:ProtonMail/android-mail.git.)
• Setup google-services.json file by running ./scripts/setup_google_services.sh
• Build with any of the following:
  • Execute ./gradlew assembleAlphaDebug in a terminal
  • Open Android Studio and build the :app module

CI / CD

CI stages are defined in the .gitlab-ci.yml file and we rely on fastlane to implement most of them. Fastlane can be installed and used locally by performing

bundle install

(requires Ruby and bundler to be available locally)

bundle exec fastlane lanes

will show all the possible actions that are available.

UI Tests

UI tests are executed on Firebase Test Lab through the CI. UI tests must run on a dev flavour (devDebug for instance).

While instrumented tests can be run locally with no additional setup, in order to run the tests located in the app/src/uiTest folder, some assets (users.json and internal_api.json for instance) might need to be downloaded and configured.

Deploy

Each merge to main branch builds the branch's HEAD and deploys it to Firebase App Distribution.

Signing

All release builds done on CI are automatically signed with ProtonMail's keystore. In order to perform signing locally, the keystore will need to be placed into the keystore/ directory and the credentials will be read from private.properties file.

Observability

Crashes and errors that happen in release (non debuggable) builds are reported to Sentry in an anonymized form. The CI sets up the integration with Sentry by providing in the build environment private.properties and sentry.properties files that contain the secrets needed. This can as well be performed locally by creating private.properties and sentry.properties files and filling them with the needed secrets (eg. SentryDSN; for more details about the sentry.properties file, see https://docs.sentry.io/platforms/android/gradle/#proguardr8--dexguard).

Use core libraries from local git submodule

It is possible to run the application getting the "core" libraries from the local git submodule instead of gradle by setting the following flag to true in gradle.properties file:

useCoreGitSubmodule=true

Code style

This project's code style and formatting is checked by detekt. The rule set is ktlint's default one

Troubleshooting

• goopenpgp.aar library not found: submodule not properly setup, please follow steps in build instructions

License

The code and data files in this distribution are licensed under the terms of the GPLv3 as published by the Free Software Foundation. See https://www.gnu.org/licenses/ for a copy of this license.