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Recipes & Other Repositories

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We've seen a bunch of ways to contribute: triaging issues & pull requests, creating pull requests and contributing to the documentation.

But there's so much more! The Symfony ecosystem is a lot bigger than just these two repositories. For example, go to github.com/symfony. Woh! There are 118 repositories under Symfony! Click on, for example, dom-crawler.

This repository is what's called a "subtree split". Cool name, right? The DomCrawler component actually lives and is managed inside of the main symfony/symfony repository that we've been working in. I'll show you: open that repository and navigate to src/Symfony, DomCrawler.

This is the DomCrawler component. An automated process splits this directory into its own repository so that people can use it independently. If you want to contribute to DomCrawler, you'll do it in symfony/symfony. The sub-tree split is read-only.

How can you know if a repository is a sub-tree split? You'll notice that the "Issues" tab has been disabled.

Other Repositories

Many of those 118 repositories under Symfony are subtree splits. And so, you contribute to them in the main repo. But a lot of them are normal repositories that you can contribute to directly. For example, recipes.

This is one of the coolest ways that you can help Symfony. If you install a bundle or library and it doesn't have a good recipe, or doesn't have a recipe at all, you should totally add or improve it! You can create a recipe here, or on the less-stringent recipes-contrib.

We're going to improve a recipe in a minute. But, first, I want to point out a few other repositories. Search for "flex". This is the Composer plugin that powers the recipe system. Search for "maker". MakerBundle is all about code generation. Try "encore": this is a library written in Node that helps make Webpack easy. And, one more: panther a new library that allows you to functionally test your pages, including the JavaScript on those pages.

And there are a lot more - like MonologBundle. The point is: each of these needs help triaging issues and reviewing pull requests. And actually, because these independent libraries get less traffic, you can make an even bigger difference in a short amount of time.

Improving a Recipe

Let's make one small contribution to the recipes. Go back to the main recipes repository. One of the recipes is for the twig/extensions library: a standalone PHP library. When you install that package, its recipe gives you a new config/packages/twig_extension.yaml file. These are the four classes provided by that library. After installing the library, you just need to uncomment the ones that you want.

Let's make this even more obvious by adding a comment above to describe that.

To do that, go back to main recipes page and copy the clone URL. Hopefully, this process is starting to feel boring... and repetitive. At your terminal, move back into the contributing/ directory and clone that:

git clone git@github.com:symfony/recipes.git

Then, move inside. To create a pull request, we will eventually need our own fork. I already have a fork, so I'll skip straight to copying my URL, going back to the terminal, and adding that remote: git remote add weaverryan and paste.

git remote add weaverryan git@github.com:weaverryan/recipes.git

Back in the editor, I'll close a few files. Then open twig/extensions/1.0/config/packages/twig_extensions.yaml:

public: false
autowire: true
autoconfigure: true
#Twig\Extensions\ArrayExtension: ~
#Twig\Extensions\DateExtension: ~
#Twig\Extensions\IntlExtension: ~
#Twig\Extensions\TextExtension: ~

Add the comment:

Uncomment any lines below to activate that Twig extension

// ... lines 2 - 6
# Uncomment any lines below to activate that Twig extension
#Twig\Extensions\ArrayExtension: ~
#Twig\Extensions\DateExtension: ~
#Twig\Extensions\IntlExtension: ~
#Twig\Extensions\TextExtension: ~

Brilliant! Let's commit this! The recipes repository is a bit unique: it only has a master branch. So, we'll create our new branch from it:

git checkout -b adding-twig-extensions-note

Then, add, commit

git add -u
git commit -m "Adding a small note about what to do in the twig_extensions.yaml file"


git push weaverryan adding-twig-extensions-note

Awesome! Go back to GitHub! Sweet! Here's the yellow bar: click "Compare & pull request". Add a small note about why we think this is a good idea. And, make sure we don't have any other "surprise" changes. Looks good. Hit "Create pull request".

Testing a Recipe

This was a pretty simple change. But, when your changes are bigger, you'll probably want to be able to test your recipe before it's merged: to see how it works in the real world!

And... we can do that! Almost immediately after posting the PR, you'll hopefully see a message: "Pull request passes validation". This means that our changes passed a few rules that are described in this repository's README.

Another spot says "View deployment". Open that in a new tab. This is really cool. The Flex server just "deployed" our recipe. And we can temporarily change our Flex "endpoints" to use our new recipe... even though it's not merged yet!

Copy the export line, find a terminal and paste:

export SYMFONY_ENDPOINT=https://symfony.sh/r/github.com/symfony/recipes/449

We just set an environment variable on this terminal tab only. To test the recipe, let's just move into one of our projects, like triage_issue_27901.

Then run:

composer require twig/extensions

When we run that, it gives us a warning that we're not using the normal Symfony endpoint... which is perfect. And... it looks like it worked!

Go check it out: open config/packages/twig_extensions.yaml. We got it! No surprise for this small tweak. But for bigger changes, this is so useful.

When you're done playing with things, be sure to unset that variable so that you once again use the real Symfony endpoint:


See you on GitHub!

Ok people, that's it! Oh, there is so much good stuff to work on in the Symfony world. And we need the help! There's complex stuff, like working on the main symfony/symfony repository. But there are also many, many other ways to contribute, like improving the documentation, working on recipes or just finding that third party library or bundle you love and helping to improve it or its docs. You are the person that can make a difference by adding that feature or fixing that bug.

And if you have more questions on contributing, ask them down in the comments! We would love to help answer them

Ok people, seeya on GitHub!