安装

其他安装命令

macOS

Homebrew已验证 · 100%

brew install sng

local Homebrew formula metadata

Linux

Debian apt已验证 · 92%

sudo apt install sng

Debian stable package indexes · sng · 来源: deb.debian.org

Fedora dnf已验证 · 92%

sudo dnf install sng

Fedora Rawhide package metadata · sng · 来源: dl.fedoraproject.org

Nix已验证 · 92%

nix profile install nixpkgs#sng

nixpkgs package indexes · pkgs/by-name/sn/sng/package.nix · 来源: api.github.com

概览

软件包摘要

Enable lossless editing of PNGs via a textual representation

项目链接

命令和别名

sng

历史

项目历史与用法

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.

项目历史

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.

采用历史

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.

使用方式

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.

为什么软件包爱好者会关心

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.

时间线

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.

来源

安全态势

风险级别：绿色

narrow executable package without higher-risk signals.

风险分类器

绿色风险 · 低置信度 · appliance

原因

narrow executable package without higher-risk signals

信号

metadata:no-higher-risk-signals

安装行为

formula 元数据中未记录 Homebrew post-install 钩子。
Homebrew bottle 元数据适用于 10 个平台目标。
安装时包含 2 个运行时依赖。

建议审查

在无人值守的代理使用前，请检查该工具是否读取明文凭据、写入远程状态、发布制品或调用插件。

可执行文件

已安装的可执行文件

命令	类型	暴露范围	备注
`sng`	cli	全局可执行文件

新鲜度

版本和新鲜度

这些信号区分页生成时间、软件包管理器活动和上游发布比较。只有存在证据 URL 和可比较版本时，才会提示版本落后。

页面生成时间2026-08-04

管理器版本1.1.1

管理器更新时间

本地数据OK

上游not checked

检测到的最新版本未检测到

https://sng.sourceforge.net/

信息No package-manager update timestamp was available.低置信度
信息Release/tag comparison is only available for GitHub repositories.https://sng.sourceforge.net/none 置信度

安装元数据

软件包元数据

软件包键	brew:sng
版本	1.1.1
软件包管理器	Homebrew
软件包管理器页面	https://formulae.brew.sh/formula/sng
主页	https://sng.sourceforge.net/
上游文档	https://sng.sourceforge.net/
许可证	Zlib
源码归档	https://downloads.sourceforge.net/project/sng/sng-1.1.1.tar.xz
依赖	libpng, xorgrgb
Bottle	可用 (于 arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, monterey, sonoma, ventura, x86_64_linux)
Homebrew post-install	未定义
服务	未声明

注册表事实

源数据库详情

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	sng
Version Scheme	0
Revision	0
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	stable

源数据库匹配

其他软件包管理器记录

匹配项来自外部软件包管理器索引，并与本地 Automic Vault 软件包链接分开显示。

Debian apt95%

sng 1.1.1-1

specialized markup language for representing PNG contents

http://sng.sourceforge.net/

sudo apt install sng

Section: graphics
Architecture: amd64
3 依赖
normalized package name match
匹配方式：Sng

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

Nix95%

sng

nix profile install nixpkgs#sng

normalized package name match
匹配方式：Sng

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

Ubuntu apt95%

sng 1.1.0-4build2

specialized markup language for representing PNG contents

http://sng.sourceforge.net/

sudo apt install sng

Section: universe/graphics
Architecture: amd64
3 依赖
normalized package name match
匹配方式：Sng

Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: sng from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz

dnf95%

sng 1.1.2-2.fc45

Lossless editing of PNGs via a textual representation

https://sng.sourceforge.net/

sudo dnf install sng

License: Zlib
Category: Unspecified
Architecture: x86_64
Source Package: sng
4 依赖
1 提供
normalized package name match
匹配方式：Sng

Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: sng from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst

软件包图谱

链接来自本地软件包关系图、补充数据、依赖边、生态匹配和软件包 hub 归属。

来源线索

由仓库数据生成

此页面由 av-web 从 scripts/generate-pkg-sqlite.py 生成的私有软件包 SQLite 工件提供。

Combined YAML source

View the package source record on GitHub.

combined/sng.yml

使用的来源

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

使用 Homebrew, apt, dnf, Nix 安装 sng