undercover warns about methods, classes and blocks that were changed without tests, to help you easily find untested code and reduce the number of bugs. It does so by analysing data from git diffs, code structure and SimpleCov coverage reports
Star History
Momentum
+21
STARS · LAST 30 DAYS
1
PER DAY
#185
MOST-STARRED Ruby
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +7 | +21 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +1 | +3 | +10 |
undercover gained 21 stars in the last 30 days, about 1 a day, and now has 845. It is about 8 years old and has averaged roughly 106 stars a year. It ranks #185 among Ruby repositories and #2,910 across all languages on GitHubRepo.
Trending Record
2
DAYS ON TRENDING
#2605
BEST RANK
Sep 27, 2026
FIRST APPEARANCE
Active
STATUS TODAY
undercover has maintained a continuous presence across global trending indexes, peaking at #2605. Below is the 30-day activity profile:
💡 Overview
undercover is an open-source project written in Ruby: undercover warns about methods, classes and blocks that were changed without tests, to help you easily find untested code and reduce the number of bugs. It does so by analysing data from git diffs, code structure and SimpleCov coverage reports.
Engineered for speed, consistency, and developer ease, it solves common hurdles in cli, code-quality, coverage. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in Ruby for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/grodowski/undercover.git
cd undercover⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
Ruby >= 3.1 with Bundler
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
undercover coordinates its core functionality through a modular Ruby pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Command-Line Automation
Execute automated build, deployment, and maintenance tasks directly from the terminal.
CI/CD Workflow Integration
Run non-interactive validation checks in GitHub Actions, GitLab CI, or local pre-commit hooks.
Developer Environment Setup
Standardize local engineering workstations with single-binary utility commands.
Scripting & Pipeline Orchestration
Chain complex multi-stage scripts with reliable error reporting and exits.
🚀 Getting Started
Install undercover using your package manager: `git clone https://github.com/grodowski/undercover.git`
Initialize your project workspace or configuration file for undercover.
Import undercover into your codebase or invoke it directly from your terminal.
Execute your test suite or run `undercover --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Ruby, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
grodowski/undercover is currently ranked #2,910 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #2,904 | kdlbs/kandev | Go | ★ 847 | Compare ↗ |
| #2,906 | swiftlang/swift-driver | Swift | ★ 846 | Compare ↗ |
| #2,906 | DevTeam/Pure.DI | C# | ★ 846 | Compare ↗ |
| #2,906 | openshift/microshift | Go | ★ 846 | Compare ↗ |
| #2,906 | nftechie/stonkfly | Python | ★ 846 | Compare ↗ |
| #2,910 | grodowski/undercover This Project | Ruby | ★ 845 | |
| #2,910 | sparklemotion/sqlite3-ruby | Ruby | ★ 845 | Compare ↗ |
| #2,912 | maddada/Ghostex | Rust | ★ 844 | Compare ↗ |
| #2,912 | kruzovic7/ai-data-extractor | Python | ★ 844 | Compare ↗ |
| #2,914 | dradis/dradis-ce | Ruby | ★ 843 | Compare ↗ |
| #2,914 | dotMorten/WinUIEx | C# | ★ 843 | Compare ↗ |
Frequently Asked Questions
What does undercover do? +
undercover warns about methods, classes and blocks that were changed without tests, to help you easily find untested code and reduce the number of bugs. It does so by analysing data from git diffs, code structure and SimpleCov coverage reports
What language is undercover written in? +
The primary language is Ruby. Topics include: cli, code-quality, coverage, hacktoberfest, linter.
Is undercover actively maintained? +
Yes, the last recorded push was on Sep 25, 2026 with 13 open issues being tracked.
How many stars does undercover have? +
undercover has 845 stars and 36 forks on GitHub.
How does undercover rank among GitHub repositories? +
With 845 stars, grodowski/undercover is ranked #2,910 globally across all repositories tracked on GitHubRepo and #185 among Ruby projects.
What license is undercover distributed under? +
The repository reports a MIT license. Always verify the repository LICENSE file for legal terms.
