Explore thousands of open-source OCaml packages with their documentation.
Opam: The OCaml Package Manager
Opam is a source-based package manager for OCaml. It supports multiple simultaneous compiler installations, flexible package constraints, and a Git-friendly development workflow.
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Most Used Packages
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PPX to process Dream's Embedded ML syntax
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CLI for Mustache logic-less templates
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A pretty expressive printer
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Urn data structure for fast pure functional random sampling
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A simple backend for trace, emitting Catapult/TEF JSON into a file
A stub for tracing/observability, agnostic in how data is collected
5.1.1 obsolete development package
Official release 5.1.1
Focus on Your Code, and opam Takes Care of Distributing It.
Our users have the highest standards for the OCaml ecosystem to run mission-critical applications across a variety of operating systems, and they expect that a package that compiles today will still work a decade from now.
Before any package update, we run sandboxed matrix builds for boundaries of the dependencies and for each of the dependent packages. A package publication will never break the rest of the ecosystem.
State of the Art
Opam supports publishing multiple versions of packages simultaneously to specify the version constraints, so only compatible revisions are chosen for a build. It comes with a performant constraint solver, a flexible CLI, a well-specified metadata format, and an easy access to the package manager logic via OCaml libraries.
The opam project and package repository is maintained by a team of developers who ensure that everything is not only running smoothly, but also curated to maintain a high degree of metadata quality. This makes it one of the most stable package repositories available today.
If you want to learn about the OCaml packages, check out the Contributing Guide on GitHub.