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What is quack?

hannes/quack — explained in plain English

Analysis updated 2026-07-17 · repo last pushed 2024-06-05

★ 3ShellAudience · developerComplexity · 4/5DormantSetup · moderate

In one sentence

A starter template for building DuckDB extensions, pre-configured project structure, example code, tests, and automated multi-platform builds.

Mindmap

mindmap
  root((quack))
    What it does
      DuckDB extension template
      Example quack function
      Prebuilt project structure
    Tech stack
      C++
      Shell
      DuckDB
      GitHub Actions
    Use cases
      Add SQL functions
      Connect data pipelines
      Add statistical functions
      Distribute extensions
    Audience
      Database developers
      Data engineers
      Researchers
    Setup
      Clone template
      Write extension code
      Automated builds to S3

Code map

Detail Auto

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filefunction / class

What do people build with it?

USE CASE 1

Build a custom SQL function for a specific industry or workload.

USE CASE 2

Connect DuckDB directly to an internal data pipeline or proprietary format.

USE CASE 3

Add statistical functions needed for a research analysis.

USE CASE 4

Package and distribute a DuckDB extension for others to install.

What is it built with?

C++ShellDuckDBGitHub ActionsAmazon S3

How does it compare?

hannes/quackmalept/github-action-gh-pagesruphy/publiccode.yml
Stars333
LanguageShellShellShell
Last pushed2024-06-052025-08-142018-06-26
MaintenanceDormantQuietDormant
Setup difficultymoderatemoderateeasy
Complexity4/52/51/5
Audiencedeveloperdeveloperpm founder

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · moderate Time to first run · 1h+

Some C++ experience helps, and distributing extensions requires setting up cloud storage and CI.

Copy-paste prompts

Prompt 1
Help me clone this DuckDB extension template and get the example quack() function running locally.
Prompt 2
Show me how to write a new SQL function extension using this template's project structure.
Prompt 3
Walk me through writing SQL tests to verify a new DuckDB extension I'm building here.
Prompt 4
Explain how the GitHub Actions workflows in this repo build and upload extension binaries to S3.
Prompt 5
Help me set up this template so I can add a custom data type to DuckDB.

Frequently asked questions

What is quack?

A starter template for building DuckDB extensions, pre-configured project structure, example code, tests, and automated multi-platform builds.

What language is quack written in?

Mainly Shell. The stack also includes C++, Shell, DuckDB.

Is quack actively maintained?

Dormant — no commits in 2+ years (last push 2024-06-05).

How hard is quack to set up?

Setup difficulty is rated moderate, with roughly 1h+ to a first successful run.

Who is quack for?

Mainly developer.

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