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Development Guide

Welcome, soon-to-be contributor 🙂! This document sums up what you need to know to get started hacking on Nativefier.

Guidelines

Before starting work on a huge change, gauge the interest of community & maintainers through a GitHub issue. For big changes, create a RFC issue to enable a good peer review.
Do your best to avoid adding new Nativefier command-line options. If a new option is inevitable for what you want to do, sure, but as much as possible try to see if you change works without. Nativefier already has a ton of them, making it hard to use.
Avoid or limit adding npm dependencies. Each new dependency is a complexity & security liability.
Use types, avoid any, write tests. In that order.
Document for users in API.md
Document for other devs in comments, jsdoc, commits, PRs. Say why more than what, the what is your code!

Setup

First, clone the project:

git clone https://github.com/nativefier/nativefier.git
cd nativefier

Install dependencies (for both the CLI and the Electron app):

npm install

The above npm install will build automatically (through the prepare hook). When you need to re-build Nativefier,

npm run build

Set up a symbolic link so that running nativefier calls your dev version with your changes:

npm link
which nativefier
# -> Should return a path, e.g. /home/youruser/.node_modules/lib/node_modules/nativefier
# If not, be sure your `npm_config_prefix` env var is set and in your `PATH`

After doing so, you can run Nativefier with your test parameters:

nativefier --your-awesome-new-flag 'https://your-test-site.com'

Then run your nativefier app through the command line too (to see logs & errors):

# Under Linux
./your-test-site-linux-x64/your-test-site

# Under Windows
your-test-site-win32-x64/your-test-site.exe

# Under macOS
./YourTestSite-darwin-x64/YourTestSite.app/Contents/MacOS/YourTestSite --verbose

Linting & formatting

Nativefier uses Prettier, which will shout at you for not formatting code exactly like it expects. This guarantees a homogenous style, but is painful to do manually. Do yourself a favor and install a Prettier plugin for your editor.

Tests

To run all tests, npm t
To run only unit tests, npm run test:unit
To run only integration tests, npm run test:integration
Logging is suppressed by default in tests, to avoid polluting Jest output. To get debug logs, npm run test:withlog or set the LOGLEVEL env. var.
For a good live experience, open two terminal panes/tabs running code/tests watchers:
1. Run a TSC watcher: npm run build:watch
2. Run a Jest unit tests watcher: npm run test:watch
Alternatively, you can run both test processes in the same terminal by running: npm run watch

Release

While on master, with no uncommitted changes, run:

npm run changelog -- $VERSION
# With no 'v'. For example: npm run changelog -- 42.5.0

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