# sng を Homebrew, apt, dnf, Nix でインストール

sng 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:sng
```

追加のインストールコマンド:

### macOS

- Homebrew (100%):

```sh
brew install sng
```

  証拠: local Homebrew formula metadata

### Linux

- Debian apt (92%):

```sh
sudo apt install sng
```

  証拠: Debian stable package indexes: sng from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz

- dnf (92%):

```sh
sudo dnf install sng
```

  証拠: Fedora Rawhide package metadata: sng from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/07190dc5ae9f35ae73866675fed6d95fe6e8d9fe22c9d7cdf85862cb2ed24a4c-primary.xml.zst

- Nix (92%):

```sh
nix profile install nixpkgs#sng
```

  証拠: nixpkgs package indexes: pkgs/by-name/sn/sng/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:sng
- **パッケージマネージャ:** Homebrew
- **バージョン:** 1.1.1
- **ソース概要:** Enable lossless editing of PNGs via a textual representation
- **ホームページ:** <https://sng.sourceforge.net/>
- **生成日時:** 2026-08-03T19:37:03+00:00

## 実行可能ファイル

- sng (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: 1.1.1
## プロジェクトの歴史と使われ方

SNG, Scriptable Network Graphics, is a textual representation for PNG files plus a compiler/decompiler named sng. It enables lossless editing of PNG structure and ancillary chunks using text tools.

### プロジェクトの歴史

The official NEWS file records a private pre-alpha release in December 1999, a public alpha days later, and a 1.0.0 production release in July 2001. The project is maintained by Eric S. Raymond and hosted on SourceForge with an official Git code browser.

### 採用の歴史

SNG has stayed small but packageable: the official README says the code is commonly packaged as sng, and the supplied package facts list Homebrew, Debian/Ubuntu, Fedora, and Nix packages.

### 使われ方

The sng program translates PNG to SNG and SNG back to PNG. Official documentation emphasizes viewing and editing obscure ancillary chunks and generating PNG content from scripts.

### パッケージ好きにとっての重要性

SNG is classic Unix packaging material: a small C command-line tool, a man page, a regression test, libpng dependency, and a stable file-format niche that has survived many libpng transitions.

### タイムライン

- 1999: Pre-alpha private release and public alpha release.
- 2001: 1.0.0 production release.
- 2015: 1.1.0 release updates libpng compatibility and fixes Mac OS X color database lookup.
- 2024: 1.1.1 improves documentation and drops autoconfig.
- 2026: 1.1.2 release listed on the official resource page.

### Related projects

- The official homepage relates SNG to PNG, libpng, the PNG test suite, and gif2png.

### ソース

- <https://sng.sourceforge.net/>
- <https://sng.sourceforge.net/NEWS.adoc>
- <https://sng.sourceforge.net/README.adoc>
- <https://sourceforge.net/p/sng/code/>
- source_facts.package-manager


## セキュリティノート

narrow executable package without higher-risk signals.

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

## 他のパッケージマネージャ記録

- Debian apt - sng - 1.1.1-1: normalized package name match | Debian stable package indexes: sng from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | specialized markup language for representing PNG contents | http://sng.sourceforge.net/
- Nix - sng: normalized package name match | nixpkgs package indexes: pkgs/by-name/sn/sng/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1
- Ubuntu apt - sng - 1.1.0-4build2: normalized package name match | Ubuntu 24.04 LTS package indexes: sng from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | specialized markup language for representing PNG contents | http://sng.sourceforge.net/
- dnf - sng - 1.1.2-2.fc45: normalized package name match | Fedora Rawhide package metadata: sng from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/07190dc5ae9f35ae73866675fed6d95fe6e8d9fe22c9d7cdf85862cb2ed24a4c-primary.xml.zst | Lossless editing of PNGs via a textual representation | https://sng.sourceforge.net/


## Combined YAML source

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


## ソース

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