# io を Homebrew, MacPorts, Nix でインストール

io 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:io
```

追加のインストールコマンド:

### macOS

- Homebrew (100%):

```sh
brew install io
```

  証拠: local Homebrew formula metadata

- MacPorts (94%):

```sh
sudo port install Io
```

  証拠: MacPorts ports tree: lang/Io/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

### Linux

- Nix (92%):

```sh
nix profile install nixpkgs#io
```

  証拠: nixpkgs package indexes: pkgs/by-name/io/io/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

## パッケージ情報

- **パッケージキー:** brew:io
- **パッケージマネージャ:** Homebrew
- **パッケージマネージャページ:** <https://formulae.brew.sh/formula/io>
- **バージョン:** 2017.09.06
- **ソース概要:** Small prototype-based programming language
- **ホームページ:** <http://iolanguage.com/>
- **リポジトリ:** <https://github.com/IoLanguage/io>
- **上流ドキュメント:** <https://iolanguage.org/guide/guide.html>
- **ライセンス:** BSD-3-Clause
- **ソースアーカイブ:** <https://github.com/IoLanguage/io/archive/refs/tags/2017.09.06.tar.gz>
- **生成日時:** 2026-07-08T18:08:21+00:00

## 実行可能ファイル

- io (cli)
- io_static (cli)
- io (エイリアス)
- io_static (エイリアス)

## ビルド依存関係

- cmake
- pkgconf

## インストール挙動

- post-install フック: 未定義
- Bottle: 利用可能 対象 arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, monterey, sonoma, ventura, x86_64_linux

## バージョンと鮮度

- ページ生成日: 2026-07-08
- マネージャ版: 2017.09.06
- ローカルデータ: OK
- 上流リポジトリ: https://github.com/IoLanguage/io
- 検出された最新: 2017.09.06 (最新)
- 情報: No package-manager update timestamp was available.
## プロジェクトの歴史と使われ方

Io is a small dynamic prototype-based programming language built around message passing, prototype objects, runtime-inspectable code, and a compact VM. Its official materials place it in the lineage of Smalltalk, Self, NewtonScript, Act1, Lisp, and Lua, with an emphasis on conceptual unification rather than surface syntax.

### プロジェクトの歴史

The official timeline says Steve Dekorte began Io in March 2002 as a minimal prototype-based language, with early public releases and a programming guide appearing through the Yahoo Group community shortly afterward. In its first year, Io gained actors, coroutines, incremental garbage collection, weak links, networking, and a quickly expanding addon system.

Io entered programming-language culture through its compact object model and message-tree semantics. The official timeline records a Lua Workshop talk and an ACM Dynamic Languages Symposium presentation in 2005, then source-history moves from email patches to a public DARCS repository, git hosting, and GitHub.

The project continued to evolve through build-system and runtime changes, including a CMake transition in 2010, Eerie package-manager work under the IoLanguage organization from 2017, and a later WebAssembly/WASI direction with JavaScript bridging. The Homebrew package is therefore attached to a language with a long experimental runtime history, not just a frozen curiosity.

### 採用の歴史

Io never became a mainstream application language, but it became memorable among programming-language enthusiasts because its tiny syntax exposes prototypes, messages, futures, actors, and code-as-data ideas directly. Its package-manager presence in Homebrew, MacPorts, and Nix reflects that role as a language runtime people install to explore or preserve a distinctive design.

Adoption is best understood as educational and exploratory. Io is the kind of package that appears in language surveys, polyglot exercises, and prototype-object discussions because it shows a coherent alternative to class-based object systems and keyword-heavy syntax.

### 使われ方

Users run the `io` interpreter or build the runtime to experiment with message sends, prototype cloning, slots, blocks, addons, and concurrency constructs. The official guide and reference are central because the language's unusual semantics are easier to understand through examples than through command flags alone.

### パッケージ好きにとっての重要性

Io matters to package nerds because it preserves a compact, radical language design in executable form. It also has the classic packaging shape of a niche language runtime: VM, interpreter, standard library, historical native addons, documentation, tags, branches, and compatibility questions across Unix-like systems.

Its significance is disproportionate to install counts. A package manager carrying Io lets users reproduce examples from programming-language books and discussions, inspect a prototype-based VM, and compare the packaging demands of small language runtimes against larger ecosystems.

### タイムライン

- 2002-03: Steve Dekorte begins work on Io.
- 2002-04: Early public releases and a programming guide appear through the early community.
- 2005-07: Io is presented at the Lua Workshop.
- 2005-10: Io is presented at the ACM Dynamic Languages Symposium.
- 2007-03: Source history moves from DARCS to git.
- 2008-02: The Io repository appears on GitHub.
- 2010-05: The build moves to CMake.
- 2017-11: Eerie package-manager work is rewritten under the IoLanguage organization.
- 2026: WASM/WASI work, stackless evaluation, resumable exceptions, and JavaScript bridging are recorded in the official timeline.

### Related projects

- Self and Smalltalk are core influences on Io's object and message model.
- NewtonScript, Act1, Lisp, and Lua are cited by the project as design influences.
- Eerie is the related Io package manager recorded in the official timeline.

### ソース

- <https://github.com/IoLanguage/io>
- <https://iolanguage.org/>
- <https://iolanguage.org/Timeline/index.html>
- <https://iolanguage.org/guide/guide.html>
- <https://iolanguage.org/reference/index.html>


## セキュリティノート

generalized runtime or code generation signal.

- **Geiger リスク:** yellow / 中
- generalized runtime or code generation signal

## ソースデータベース詳細

- **Source Database:** Homebrew formula API
- **Tap:** homebrew/core
- **Full Name:** io
- **Version Scheme:** 0
- **Revision:** 1
- **Head Version:** HEAD
- **Bottle Stable Root URL:** <https://ghcr.io/v2/homebrew/core>
- **Deprecated:** no
- **Disabled:** no
- **Keg Only:** no
- **URL Keys:** head, stable

## 他のパッケージマネージャ記録

- Nix - io: normalized package name match | nixpkgs package indexes: pkgs/by-name/io/io/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1
- MacPorts - Io: normalized package name match | MacPorts ports tree: lang/Io/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1


## 関連リンク

- [Secret-risk packages](https://www.automicvault.com/ja/pkg/secret-risk-packages/) - Has protected-tool coverage, approval-gate, or non-low Geiger security signals.
- [Terminal utility packages](https://www.automicvault.com/ja/pkg/terminal-utilities/) - Matched terminal and command-line workflow metadata.
- [Language runtime packages](https://www.automicvault.com/ja/pkg/language-runtime-packages/) - Matched language runtime, compiler, or interpreter metadata.
- [Networking and protocol packages](https://www.automicvault.com/ja/pkg/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata.
- [cmake](https://www.automicvault.com/ja/pkg/brew/cmake/) - Build dependency declared by Homebrew.
- [pkgconf](https://www.automicvault.com/ja/pkg/brew/pkgconf/) - Build dependency declared by Homebrew.
- [gnu-apl](https://www.automicvault.com/ja/pkg/brew/gnu-apl/) - Shares av.db curated category or tags: cli, language-runtime, programming-language, scripting.
- [gosu](https://www.automicvault.com/ja/pkg/brew/gosu/) - Shares av.db curated category or tags: cli, language-runtime, programming-language, scripting.
- [groovy](https://www.automicvault.com/ja/pkg/brew/groovy/) - Shares av.db curated category or tags: cli, language-runtime, programming-language, scripting.
- [janet](https://www.automicvault.com/ja/pkg/brew/janet/) - Shares av.db curated category or tags: cli, language-runtime, programming-language, scripting.
- [julia](https://www.automicvault.com/ja/pkg/brew/julia/) - Shares av.db curated category or tags: cli, dynamic-language, language-runtime, programming-language.
- [lua](https://www.automicvault.com/ja/pkg/brew/lua/) - Shares av.db curated category or tags: cli, language-runtime, programming-language, scripting.
- [luau](https://www.automicvault.com/ja/pkg/brew/luau/) - Shares av.db curated category or tags: cli, language-runtime, programming-language, scripting.
- [nu](https://www.automicvault.com/ja/pkg/brew/nu/) - Shares av.db curated category or tags: cli, language-runtime, programming-language, scripting.

## Combined YAML source

View the package source record on GitHub. [combined/io.yml](https://github.com/automic-vault/db/blob/main/combined/io.yml)


## ソース

- Nucleus package database
- Geiger risk classifier
- package-page enrichment
- curated package history
- package version freshness
- av.db category and tag curation
- package relationship graph
- external package-manager database matches
- cross-ecosystem install command graph