wtf is setup-compact-action?

openzeppelin/setup-compact-action — explained in plain English

Analysis updated 2026-07-25 · repo last pushed 2025-12-11

Audience · developerComplexity · 2/5QuietSetup · easy

Mindmap

mindmap
  root((repo))
    What it does
      Downloads Compact compiler
      Caches for fast reuse
      Runs in GitHub Actions
    Use cases
      Automate smart contract testing
      Consistent CI compilation
      Privacy app deployment
    Tech stack
      GitHub Actions
      Compact compiler
      Midnight blockchain
    Audience
      Smart contract devs
      Startups on Midnight
      CI pipeline builders
    Setup
      Pick a compiler version
      First run takes 30-60s
      Cached runs take 2-5s

mindmap root((repo)) What it does Downloads Compact compiler Caches for fast reuse Runs in GitHub Actions Use cases Automate smart contract testing Consistent CI compilation Privacy app deployment Tech stack GitHub Actions Compact compiler Midnight blockchain Audience Smart contract devs Startups on Midnight CI pipeline builders Setup Pick a compiler version First run takes 30-60s Cached runs take 2-5s

Why would anyone build with this?

REASON 1

Automate compilation of Midnight smart contracts on every code push.

REASON 2

Set up a consistent CI pipeline for testing privacy-focused decentralized apps.

REASON 3

Speed up GitHub Actions workflows by caching the Compact compiler across runs.

What's in the stack?

GitHub ActionsCompact compilerMidnight blockchain

How it stacks up

	openzeppelin/setup-compact-action	00kaku/gallery-slider-block	04amanrajj/netwatch
Stars	—	—	0
Language	—	JavaScript	Rust
Last pushed	2025-12-11	2021-05-19	—
Maintenance	Quiet	Dormant	—
Setup difficulty	easy	easy	moderate
Complexity	2/5	2/5	3/5
Audience	developer	general	ops devops

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

How do you spin it up?

Difficulty · easy Time to first run · 5min

No external infrastructure is needed beyond a GitHub repository with Actions enabled, the action handles downloading and caching automatically.

The license is not mentioned in the explanation, so the usage rights for this repository are unknown.

Wtf does this do

The setup-compact-action is a tool for developers building smart contracts on the Midnight blockchain. It automates the process of installing the Compact compiler, which is the software that translates Compact source code into a format the blockchain can run. Without this, developers would have to manually download and configure the compiler every time they want to test or deploy their code. The tool runs inside GitHub Actions, which is an automated workflow service built into GitHub. When a developer pushes new code, this action automatically downloads the correct version of the Compact compiler and makes it ready to use. You can ask for a specific version or just grab the latest one. The action also caches the compiler, meaning it saves a copy after the first download so future runs skip the download step entirely. A first-time setup takes about 30 to 60 seconds, but cached runs finish in 2 to 5 seconds. This is designed for teams and individual developers who write Midnight smart contracts and want to automate their testing and deployment pipeline. For example, if a startup is building a privacy-focused decentralized app on Midnight, they would use this action to ensure every code change gets compiled and tested consistently, without any developer having to set up their local machine in a specific way. The caching strategy is straightforward and built around three factors: the Compact version requested, the operating system, and the processor architecture. This keeps things fast while making sure the right binary is restored for each platform. The README doesn't go into detail on the compiler itself or what Compact code looks like, so developers would need to look elsewhere for language documentation and broader Midnight platform guidance.

Yoink these prompts

Prompt 1

Write a GitHub Actions workflow that uses openzeppelin/setup-compact-action to install the latest Compact compiler and then compile my smart contract files.

Prompt 2

Show me how to pin a specific Compact compiler version using setup-compact-action and cache it for faster runs on macOS and Linux.

Prompt 3

Create a CI workflow that uses setup-compact-action to install the Compact compiler, compiles my Compact source code, and runs any available tests on every push.

Frequently asked questions