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joplin/BUILD.md
Roman Musin 261302d5c4
Doc: Update BUILD.md (#6241)
Add a note that the path may not contain spaces
2022-03-07 10:23:06 +00:00

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Building the applications

The Joplin source code is hosted on a monorepo and is managed using Yarn workspaces (as well as Lerna for publishing the packages).

The list of the main sub-packages is below:

Package name Description
app-cli The CLI application
app-clipper The web clipper
app-desktop The desktop application
app-mobile The mobile application
lib The core library, shared by all applications. It deals with things like synchronisation, encryption, import/export, database and pretty much all the app business logic
renderer The Joplin Markdown and HTML renderer
tools Tools used to build the apps and other tasks

There are also a few forks of existing packages under the "fork-*" name.

Required dependencies

  • Install Node 16+. On Windows, also install the build tools - https://nodejs.org/en/
  • macOS: Install Cocoapods - brew install cocoapods. Apple Silicon may require libvips - brew install vips.
  • Linux: Install dependencies - sudo apt install build-essential libnss3 libsecret-1-dev python rsync

Building

Make sure the path to the project directory does not contain spaces or the build may fail.

Before doing anything else, from the root of the project, run:

yarn install

Then you can test the various applications:

Testing the desktop application

cd packages/app-desktop
yarn start

You can also run it under WSL 2. To do so, follow these instructions to setup your environment.

Testing the Terminal application

cd packages/app-cli
yarn start

Testing the Mobile application

First you need to setup React Native to build projects with native code. For this, follow the instructions in the Setting up the development environment tutorial, in the "React Native CLI Quickstart" tab.

Then, for Android:

cd packages/app-mobile/android
./gradlew installDebug # or gradlew.bat installDebug on Windows

On iOS, open the file ios/Joplin.xcworkspace on XCode and run the app from there.

Normally the bundler should start automatically with the application. If it doesn't, run yarn start from packages/app-mobile.

Building the clipper

cd packages/app-clipper/popup
npm run watch # To watch for changes

To test the extension please refer to the relevant pages for each browser: Firefox / Chrome. Please note that the extension in dev mode will only connect to a dev instance of the desktop app (and vice-versa).

Watching files

To make changes to the application, you'll need to rebuild any TypeScript file you've changed. The simplest way to do this is to watch for changes from the root of the project. Simply run this command, and it should take care of the rest:

yarn run watch

Running yarn run tsc would have the same effect, but without watching.

Running an application with additional parameters

You can specify additional parameters when running the desktop or CLI application. To do so, add -- to the yarn start command, followed by your flags. For example:

yarn start --debug

TypeScript

The application was originally written in JavaScript, however it has slowly been migrated to TypeScript. New classes and files should be written in TypeScript. All compiled files are generated next to the .ts or .tsx file. So for example, if there's a file "lib/MyClass.ts", there will be a generated "lib/MyClass.js" next to it. It is implemented that way as it requires minimal changes to integrate TypeScript in the existing JavaScript code base.

Hot reload

If you'd like to auto-reload the desktop app on changes rather than having to quit and restart it manually each time, you can use watchman-make:

cd packages/app-desktop
watchman-make -p '**/*.js' '**/*.jsx' --run "yarn start"

It still requires you to quit the application each time you want it to rebuild, but at least you don't have to re-run "yarn start" each time. Here's what the workflow loop looks like in practice:

  1. Edit and save files in your text editor.
  2. Switch to the Electron app and cmd+Q to quit it.
  3. watchman immediately restarts the app for you (whereas usually you'd have to switch back to the terminal, type "yarn start", and hit enter).

Troubleshooting

Please read for the Build Troubleshooting Document for various tips on how to get the build working.