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Website CC BY-NC-SA 4.0 License Checks

The ClickHouse company logo.

ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real-time.


ClickHouse is blazing fast, but understanding ClickHouse and using it effectively is a journey. The documentation is your source for gaining the knowledge you need to be successful with your ClickHouse projects and applications. Head over to clickhouse.com/docs to learn more →

Table of contents

About this repo

This repository manages the documentation for ClickHouse. The content is built with Docusaurus and hosted on Vercel. Documentation content is written in Markdown and is held in the /docs directory.

Run locally

You can run a copy of this website locally within a few steps. Some folks find this useful when contributing so they can see precisely what their changes will look like on the production site.

  1. Install Git, NPM, and Yarn. If you already have them installed, skip this step:

    OS Package manager Install command
    MacOS Homebrew brew install git node yarn
    Ubuntu Apt sudo apt install git nodejs npm yarn
    Arch Pacman sudo pacman -S git nodejs npm yarn
    Windows Chocolatey choco install git nodejs-lts yarn
  2. Clone this repository and move into the clickhouse-docs directory:

    git clone https://github.com/clickhouse/clickhouse-docs
    cd clickhouse-docs
  3. Install the project dependencies with Yarn:

    yarn install
    
    # yarn install v1.22.19
    # [1/5] 🔍  Validating package.json...
    # [2/5] 🔍  Resolving packages...
    # ...
    # success Saved lockfile.
    # ✨  Done in 6.44s.
  4. Use Yarn to grab the latest documentation changes from the clickhouse/clickhouse repository:

    yarn prep-from-master
    
    # yarn run v1.22.19
    # Cloning into '/tmp/ch_temp_14714'...
    # ...
    # Prep completed
    # ✨  Done in 16.44s
  5. Start the local web-server:

    yarn start
    
    # yarn run v1.22.19
    # $ docusaurus start
    # ...
    #

    This command will build the documentation site and serve it locally. Once the build has finished, browse the website at localhost:3000.

  6. To stop the local server, press ctrl + c in the terminal window.

If you want to build a static copy of this repository that doesn't require a constant server running to view, you can use yarn build instead of yarn start. The yarn build will output a static copy of the website in the /build directory. This process takes around 10 minutes to complete on an M1 Macbook with 8GB RAM.

Notes

Here are some things to keep in mind when building a local copy of the ClickHouse docs site.

Build-time

Due to the complex structure of this repo, the docs site can take some time to build locally. As a benchmark, it takes ~3 minutes to build on an M1 Macbook with 8GB RAM.

Redirects

Due to how the local server is built, redirects will not work. For example, visiting clickhouse.com/docs on the production site will lead you to clickhouse.com/docs/en/intro. However, on a local copy of the site, you will see a 404 page if you try to visit localhost:8000/docs.

Contributing

Want to help out? Contributions are always welcome! If you want to help out but aren't sure where to start, check out the issues board.

Pull requests

Please assign any pull request (PR) against an issue; this helps the docs team track who is working on what and what each PR is meant to address. If there isn't an issue for the specific thing you want to work on, quickly create one and assign yourself to it.

Check out the GitHub docs for a refresher on how to create a pull request.

Tests and CI/CD

There are five workflows that run against PRs in this repo:

Name Description
Debug A debugging tool that prints environment variables and the content of the GITHUB_EVENT_PATH variable for each commit.
Link check Checks for broken external links in this repo.
Pull request This is a meta workflow that sets up a testing environment and calls the docs_check.py and finish_check.py scripts.
Scheduled Vercel build Builds the site every day at 00:10 UTC and hosts the build on Vercel.
Trigger build Uses the peter-evans/repository-dispatch@v2 workflow to create a repository dispatch.

Quick contributions

Have you noticed a typo or found some wonky formatting? For small contributions like these, it's usually faster and easier to make your changes directly in GitHub. Here's a quick guide to show you how the GitHub editor works:

  1. Each page in Clickhouse.com/docs has an Edit this page link at the bottom:

    The ClickHouse Docs website with the edit button highlighted.

    Click this button to edit this page in GitHub.

  2. Once you're in GitHub, click the pencil icon to edit this page:

  3. GitHub will fork the repository for you. This creates a copy of the clickhouse-docs repository on your personal GitHub account.

  4. Make your changes in the textbox. Once you're done, click Commit changes:

  5. In the Propose changes popup, enter a descriptive title to explain the changes you just made. Keep this title to 10 words or less. If your changes are fairly complex and need further explanation, enter your comments into the Extended description field.

  6. Make sure Create a new branch is selected, and click Propose changes:

  7. A new page should open with a new pull request. Double-check that the title and description are accurate.

  8. If you've spoken to someone on the docs team about your changes, tag them into the Reviewers section:

    If you haven't mentioned your changes to anyone yet, leave the Reviewers section blank.

  9. Click Create pull request.

At this point, your pull request will be handed over to the docs team, who will review it and suggest or make changes where necessary.

Issues

Found a problem with the Clickhouse docs site? Please raise an issue. Be as specific and descriptive as possible; screenshots help!

License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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