macOS
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brew install onigmolocal Homebrew formula metadata
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Install onigmo with Homebrew
Regular expressions library forked from Oniguruma. Version 6.2.0 via Homebrew; verified from local package data.
install
Additional install commands
overview
Package summary
Regular expressions library forked from Oniguruma
Project links
Commands and aliases
- onigmo-config
history
Project history and usage
Onigmo, short for Oniguruma-mod, is a BSD-licensed regular-expression library forked from Oniguruma. It focuses on adding syntax supported by Perl 5.10 and later, including operators such as \K, \R, and conditional patterns.
Project history
The upstream README describes Onigmo as a fork of Oniguruma with a focus on newer expression syntax. Its most important branch of influence came through Ruby: the README says Onigmo is the default regexp library of Ruby 2.0 or later and that many patches are backported from Ruby 2.x.
Ruby's own issue discussion for merging Onigmo into Ruby 2.0 framed the change as replacing the Oniguruma base used by Ruby 1.9's regular-expression and M17N infrastructure with k-takata's modified Onigmo.
Adoption history
Onigmo's adoption is strongest through embedders rather than direct CLI use. Ruby made it part of the language runtime, and Fluent Bit's documentation says its Ruby-mode regular-expression parser uses the Onigmo library.
The Homebrew formula exposes Onigmo as a standalone library package with an onigmo-config helper, giving downstream C and C++ consumers a conventional way to compile and link against it.
How it is used
Developers embed Onigmo when they want Ruby-compatible or Perl-influenced regular-expression behavior in native code. The upstream build notes cover Unix/Cygwin configure builds, Windows Visual C++ builds, static and dynamic libraries, tests across encodings, and the onigmo-config flags needed by downstream builds.
Why package nerds care
Onigmo matters because it is both a fork and a runtime substrate: package managers carry it as a library, but many users encounter it indirectly through Ruby-compatible regex behavior. It also illustrates how language runtime needs can pull a general-purpose C library into a specialized fork.
Timeline
- Ruby 2.0 planning: Ruby issue #5820 targeted merging Onigmo as the replacement for Ruby 1.9's Oniguruma-derived regex engine.
- Ruby 2.0 and later: the Onigmo README identifies it as Ruby's default regexp library in this era.
Related projects
- Onigmo is directly related to Oniguruma, Ruby's regular-expression engine history, and embedders such as Fluent Bit that expose Ruby-style regular expressions.
Sources
security posture
Risk level: green
library-like package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- library-like package without higher-risk signals
Signals
- metadata:library-like
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 8 platform targets.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
onigmo-config | cli | global executable |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-07-08
manager version6.2.0
manager updated
local dataok
upstreamnot checked
latest detectednot detected
https://github.com/k-takata/Onigmo
- infoNo package-manager update timestamp was available.low confidence
- infoNo cached GitHub release or tag data was available.https://github.com/k-takata/Onigmonone confidence
install metadata
Package metadata
| Package key | brew:onigmo |
|---|---|
| Version | 6.2.0 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/onigmo |
| Homepage | https://github.com/k-takata/Onigmo |
| Repository | https://github.com/k-takata/Onigmo |
| Upstream docs | https://github.com/k-takata/Onigmo#readme |
| License | BSD-2-Clause |
| Source archive | https://github.com/k-takata/Onigmo/releases/download/Onigmo-6.2.0/onigmo-6.2.0.tar.gz |
| Bottle | available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, sonoma, ventura, x86_64_linux) |
| Homebrew post-install | not defined |
| Service | none declared |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | onigmo |
| Version Scheme | 0 |
| Revision | 0 |
| Head Version | HEAD |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- Nucleus package database
- av.db category and tag curation
- cross-ecosystem install command graph
- curated package history
- package relationship graph
- package version freshness
- package-page enrichment