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wtf is rake-compiler-dock?

gjtorikian/rake-compiler-dock — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2026-01-06

Audience · developerComplexity · 3/5QuietSetup · moderate

TL;DR

A Docker-based build environment that lets Ruby gem authors compile native C extensions for Windows, Mac, and Linux from a single machine.

Mindmap

mindmap
  root((repo))
    What it does
      Cross-compiles gems
      Docker containers
      Multi-platform builds
    Tech stack
      Docker
      Ruby
      Rake
    Use cases
      Build Windows gems on Mac
      Support ARM Linux
      Automate in CI
    Audience
      Gem maintainers
      C extension authors
    Setup
      Needs Docker
      Versioned containers

Code map

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filefunction / class

Why would anyone build with this?

REASON 1

Cross-compile a Ruby gem with C extensions for Windows, Mac, and Linux from one machine.

REASON 2

Build native gems for both GNU and musl variants of Linux without separate build machines.

REASON 3

Integrate automated cross-platform gem builds into a CI pipeline like GitHub Actions.

REASON 4

Debug a gem's native build interactively inside a versioned container shell.

What's in the stack?

RubyDockerRakeCJava

How it stacks up

gjtorikian/rake-compiler-dock0verflowme/alarm-clock0verflowme/seclists
Language—CSS—
Last pushed2026-01-062022-10-032020-05-03
MaintenanceQuietDormantDormant
Setup difficultymoderateeasyeasy
Complexity3/52/51/5
Audiencedevelopervibe coderops devops

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

How do you spin it up?

Difficulty · moderate Time to first run · 30min

Requires Docker installed and running to spin up the build containers.

Yoink these prompts

Prompt 1
Show me how to configure rake-compiler-dock to cross-compile my Ruby gem's C extension for x64-mingw-ucrt Windows.
Prompt 2
Help me set up a GitHub Actions workflow that uses rake-compiler-dock to build my gem for Linux, macOS, and Windows.
Prompt 3
Explain how to target both GNU and musl Linux builds for my Ruby gem using rake-compiler-dock.
Prompt 4
Walk me through debugging a failed native extension build inside a rake-compiler-dock container shell.

Frequently asked questions

wtf is rake-compiler-dock?

A Docker-based build environment that lets Ruby gem authors compile native C extensions for Windows, Mac, and Linux from a single machine.

Is rake-compiler-dock actively maintained?

Quiet — no commits in 6-12 months (last push 2026-01-06).

How hard is rake-compiler-dock to set up?

Setup difficulty is rated moderate, with roughly 30min to a first successful run.

Who is rake-compiler-dock for?

Mainly developer.

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