# Contributing to Pulumi

First, thanks for contributing to Pulumi and helping make it better. We appreciate the help!
This repository is one of many across the Pulumi ecosystem and we welcome contributions to them all.

## Code of Conduct

Please make sure to read and observe our [Contributor Code of Conduct](./CODE-OF-CONDUCT.md).

## Communications

You are welcome to join the [Pulumi Community Slack](https://slack.pulumi.com/) for questions and a community of like-minded folks.
We discuss features and file bugs on GitHub via [Issues](https://github.com/pulumi/pulumi/issues) as well as [Discussions](https://github.com/pulumi/pulumi/discussions).
You can read about our [public roadmap](https://github.com/orgs/pulumi/projects/44) on the [Pulumi blog](https://www.pulumi.com/blog/relaunching-pulumis-public-roadmap/).

### Issues

Feel free to pick up any existing issue that looks interesting to you or fix a bug you stumble across while using Pulumi. No matter the size, we welcome all improvements.

### Feature Work

For larger features, we'd appreciate it if you open a [new issue](https://github.com/pulumi/pulumi/issues/new) before investing a lot of time so we can discuss the feature together.
Please also be sure to browse [current issues](https://github.com/pulumi/pulumi/issues) to make sure your issue is unique, to lighten the triage burden on our maintainers.

## Developing

### Setting up your Pulumi development environment

You'll want to install the following on your machine:

- Go 1.17
- NodeJS 14.X.X or later
- Python 3.6 or later
- [.NET Core](https://dotnet.microsoft.com/download)
- [Golangci-lint](https://github.com/golangci/golangci-lint)
- [Yarn](https://yarnpkg.com/)
- [Pulumictl](https://github.com/pulumi/pulumictl)

### Installing Pulumi dependencies on macOS

You can get all required dependencies with brew and npm

```bash
brew install node python@3 typescript yarn go@1.17 golangci/tap/golangci-lint pulumi/tap/pulumictl coreutils
curl https://raw.githubusercontent.com/Homebrew/homebrew-cask/0272f0d33f/Casks/dotnet-sdk.rb > dotnet-sdk.rb  # v3.1.0
brew install --HEAD -s dotnet-sdk.rb
rm dotnet-sdk.rb
```

### Working on Pulumi in Gitpod

If you have a web browser, you can get a fully pre-configured Pulumi development environment in one click:

[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/pulumi/pulumi)

### Make build system

We use `make` as our build system, so you'll want to install that as well, if you don't have it already. We have extremely limited support for doing development on Windows (the bare minimum for us to get Windows validation of `pulumi`) so if you're on windows, we recommend that you use the [Windows Subsystem for Linux](https://docs.microsoft.com/en-us/windows/wsl/install-win10). We'd like to [make this better](https://github.com/pulumi/pulumi/issues/208) so feel free to pitch in if you can.

We build Pulumi in `$PULUMI_ROOT`, which defaults to `$HOME/.pulumi-dev`. If you would like to build Pulumi in another location, you do so by setting `$PULUMI_ROOT`. 

```bash
export PATH=$HOME/.pulumi-dev/bin:$PATH
```

You'll also need to make sure your maximum open file descriptor limit is set to 5000 at a minimum.

```bash
ulimit -n # to test
ulimit -n 5000
```

Across our projects, we try to use a regular set of make targets. The ones you'll care most about are:

1. `make ensure`, which restores/installs any build dependencies
1. `make dist`, which just builds and installs the Pulumi CLI
1. `make`, which builds Pulumi and runs a quick set of tests
1. `make all` which builds Pulumi and runs the quick tests and a larger set of tests.

We make heavy use of integration level tests that invoke `pulumi` to create and then delete cloud resources. In order to run our integration tests, you will need a Pulumi account (so [sign up for free](https://pulumi.com) today if you haven't already) and log in with `pulumi login`.

The tests in this repository do not create any real cloud resources as part of testing but still uses Pulumi.com to store information about some synthetic resources the tests create. Other repositories may require additional setup before running tests. In most cases, this additional setup consists of setting a few environment variables to configure the provider for the the cloud service we are testing. Please see the `CONTRIBUTING.md` file in the relevant repository, which will explain what additional configuration is needed before running tests.

### Debugging

The Pulumi tools have extensive logging built in.  In fact, we encourage liberal logging in new code, and adding new logging when debugging problems.  This helps to ensure future debugging endeavors benefit from your sleuthing.

All logging is done using a fork of Google's [Glog library](https://github.com/pulumi/glog).  It is relatively bare-bones, and adds basic leveled logging, stack dumping, and other capabilities beyond what Go's built-in logging routines offer.

The `pulumi` command line has two flags that control this logging and that can come in handy when debugging problems. The `--logtostderr` flag spews directly to stderr, rather than the default of logging to files in your temp directory. And the `--verbose=n` flag (`-v=n` for short) sets the logging level to `n`.  Anything greater than 3 is reserved for debug-level logging, greater than 5 is going to be quite verbose, and anything beyond 7 is extremely noisy.

For example, the command

```sh
$ pulumi preview --logtostderr -v=5
```

is a pretty standard starting point during debugging that will show a fairly comprehensive trace log of a compilation.

## Submitting a Pull Request

For contributors we use the [standard fork based workflow](https://gist.github.com/Chaser324/ce0505fbed06b947d962): Fork this repository, create a topic branch, and when ready, open a pull request from your fork.

When adding a changelog entry, please be sure to use `CHANGELOG_PENDING.md` for the entry - we will then be able to ensure your pull request gets into the next release.

## Getting Help

We're sure there are rough edges and we appreciate you helping out. If you want to talk with other folks in the Pulumi community (including members of the Pulumi team) come hang out in the `#contribute` channel on the [Pulumi Community Slack](https://slack.pulumi.com/).
