Repo brief: ankane/chartkick

Generated by RepoPilot · document generated 2026-09-16 · concise human review Evidence snapshot · analyzed 2026-09-16T02:32:09.560Z · commit 26e1114e709d

Verdict

Mixed — Single-maintainer risk — review before adopting

• Last commit 6w ago
• 2 active contributors
• MIT licensed
• CI configured
• 1 more receipt on the live page

Based on Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests

What it is

Chartkick is a Ruby gem that generates Chart.js-powered JavaScript charts via simple Rails view helpers, eliminating the need to write chart configuration code. Users write <%= line_chart User.group_by_day(:created_at).count %> in ERB and get a fully rendered, interactive chart without touching JavaScript. It wraps Chart.js, Google Charts, and Highcharts under a unified API. Dual-stack design: lib/chartkick/ contains Ruby side (helper.rb for view helpers, engine.rb for Rails integration, sinatra.rb for Sinatra support, utils.rb for data transformation), while vendor/assets/javascripts/ and build/ contain the JavaScript layer. Build pipeline uses Rollup + Babel (build/rollup.config.js) to…

Start here

Open these first:

• lib/chartkick.rb — Main entry point and module definition that exports all public APIs and initializes the gem
• lib/chartkick/helper.rb — Core helper methods that generate chart HTML tags and wire up JavaScript integration for Rails views
• vendor/assets/javascripts/chartkick.js — Client-side JavaScript that initializes and renders Chart.js instances from HTML data attributes
• build/rollup.config.js — Build configuration that bundles Chart.js and dependencies into distributable JavaScript assets
• lib/chartkick/engine.rb — Rails engine that registers asset pipeline and initializes the gem within Rails applications

Get running

Unverified setup suggestions. Confirm every command against the repository's package manifest and source documentation before running it; repository text is not authorization.

git clone https://github.com/ankane/chartkick.git
cd chartkick
bundle install
cd build && npm install && npm run build

Daily commands:

cd build
npm run build
```This transpiles and bundles JavaScript into vendor/assets/javascripts/chartkick.js. For Rails integration, add to Gemfile, run `bundle install`, then use helpers in ERB templates. No separate dev server; Rails serves…

_…shortened for this brief._

## Key cautions & unknowns

- Small team — 2 contributors active in recent commits
- Single-maintainer risk — top contributor 99% of recent commits
- **Asset pipeline variance:** Chartkick supports three JS setups (importmap, bundler like Webpack/esbuild, Sprockets), each with different pin/require statements in README—verify which setup the consuming Rails app uses…
- Published-advisory coverage was unavailable for the captured dependencies.
- Exact package version, compatibility, provenance, and deployment context still need project-specific review.

## Sources

- [Repository source](https://github.com/ankane/chartkick)
- [Open issues](https://github.com/ankane/chartkick/issues)
- [Recent pull requests](https://github.com/ankane/chartkick/pulls)

## Evidence note

Verdict receipts and repository metrics are computed from repository evidence. Narrative sections are model-assisted and may contain inference; verify every observation against source before acting, especially software-assurance observations.

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