# onigmo を Homebrew でインストール

onigmo のインストール経路、実行ファイル、メタデータ、AI エージェント向けセキュリティノートを確認します。

## インストール

```sh
sudo av install brew:onigmo
```

追加のインストールコマンド:

### macOS

- Homebrew (100%):

```sh
brew install onigmo
```

  証拠: local Homebrew formula metadata

## パッケージ情報

- **パッケージキー:** brew:onigmo
- **パッケージマネージャ:** Homebrew
- **バージョン:** 6.2.0
- **ソース概要:** Regular expressions library forked from Oniguruma
- **ホームページ:** <https://github.com/k-takata/Onigmo>
- **リポジトリ:** <https://github.com/k-takata/Onigmo>
- **生成日時:** 2026-08-03T19:37:03+00:00

## 実行可能ファイル

- onigmo-config (エイリアス)

## インストール挙動

- Bottle: 利用不可

## バージョンと鮮度

- ページ生成日: 2026-08-03
- マネージャ版: 6.2.0
## プロジェクトの歴史と使われ方

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.

### プロジェクトの歴史

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.

### 採用の歴史

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.

### 使われ方

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.

### パッケージ好きにとっての重要性

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.

### タイムライン

- 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.

### ソース

- <https://docs.fluentbit.io/manual/1.5/pipeline/parsers/regular-expression>
- <https://formulae.brew.sh/formula/onigmo>
- <https://github.com/k-takata/Onigmo>
- <https://www.ruby-forum.com/t/ruby-trunk-feature-5820-assigned-merge-onigmo-to-ruby-2-0/215257>


## セキュリティノート

library-like package without higher-risk signals.

- **Geiger リスク:** グリーン / 低
- library-like package without higher-risk signals


## Combined YAML source

View the package source record on GitHub. [combined/onigmo.yml](https://github.com/mxcl/pkgdb/blob/main/combined/onigmo.yml)


## ソース

- pkg.so package database
- Geiger risk classifier
- curated package history
- pkgdb category and tag curation
- cross-ecosystem install command graph