mirror of
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73 lines
3.1 KiB
Markdown
73 lines
3.1 KiB
Markdown
Building Signal
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===============
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Basics
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------
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Signal uses [Gradle](http://gradle.org) to build the project and to maintain
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dependencies. However, you needn't install it yourself; the
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"gradle wrapper" `gradlew`, mentioned below, will do that for you.
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Building Signal
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---------------
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The following steps should help you (re)build Signal from the command line.
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1. Checkout the Signal-Android project source with the command:
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git clone https://github.com/WhisperSystems/Signal-Android.git
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2. Make sure you have the [Android SDK](https://developer.android.com/sdk/index.html) installed.
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3. Ensure that the following packages are installed from the Android SDK manager:
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* Android SDK Build Tools (see buildToolsVersion in build.gradle)
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* SDK Platform (All API levels)
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* Android Support Repository
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* Google Repository
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4. Create a local.properties file at the root of your source checkout and add an sdk.dir entry to it. For example:
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sdk.dir=/Application/android-sdk-macosx
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5. Execute Gradle:
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./gradlew build
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Visual assets
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----------------------
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Source assets tend to be large binary blobs, which are best stored outside of git repositories. We host ours in a [Pixelapse repository](https://www.pixelapse.com/openwhispersystems/projects/signal-android/). Some source files are SVGs that can be auto-colored and sized using a tool like [android-res-utils](https://github.com/sebkur/android-res-utils).
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Sample command for generating our audio placeholder image:
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```bash
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pngs_from_svg.py ic_audio.svg /path/to/Signal/res/ 150 --color #000 --opacity 0.54 --suffix _light
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pngs_from_svg.py ic_audio.svg /path/to/Signal/res/ 150 --color #fff --opacity 1.00 --suffix _light
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```
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Setting up a development environment
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------------------------------------
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[Android Studio](https://developer.android.com/sdk/installing/studio.html) is the recommended development environment.
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1. Install Android Studio.
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2. Open Android Studio. On a new installation, the Quickstart panel will appear. If you have open projects, close them using "File > Close Project" to see the Quickstart panel.
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3. From the Quickstart panel, choose "Configure" then "SDK Manager".
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4. In the SDK Tools tab of the SDK Manager, make sure that the "Android Support Repository" is installed, and that the latest "Android SDK build-tools" are installed. Click "OK" to return to the Quickstart panel.
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5. From the Quickstart panel, choose "Checkout from Version Control" then "git".
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6. Paste the URL for the Signal-Android project when prompted (https://github.com/WhisperSystems/Signal-Android.git).
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7. Android studio should detect the presence of a project file and ask you whether to open it. Click "yes".
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9. Default config options should be good enough.
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9. Project initialisation and build should proceed.
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Contributing code
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-----------------
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Code contributions should be sent via github as pull requests, from feature branches [as explained here](https://help.github.com/articles/using-pull-requests).
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Mailing list
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------------
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Development discussion happens on the whispersystems mailing list.
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[To join](https://lists.riseup.net/www/info/whispersystems)
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Send emails to whispersystems@lists.riseup.net
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