brew

使用 Homebrew, apk, apt, dnf, MacPorts, Nix, pacman, zypper 安装 expat

查看 expat 的安装路径、可执行文件、元数据以及面向 AI 代理工作流的安全说明。

安装命令安全说明

安装

其他安装命令

macOS

Homebrew已验证 · 100%

brew install expat

local Homebrew formula metadata

MacPorts已验证 · 94%

sudo port install expat

MacPorts ports tree · textproc/expat/Portfile · 来源: api.github.com

Linux

Alpine Linux apk已验证 · 92%

sudo apk add expat

Alpine Linux edge package indexes · expat · 来源: dl-cdn.alpinelinux.org

Debian apt已验证 · 92%

sudo apt install expat

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

Fedora dnf已验证 · 92%

sudo dnf install expat

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

Nix已验证 · 92%

nix profile install nixpkgs#expat

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

Arch Linux pacman已验证 · 92%

sudo pacman -S expat

Arch Linux sync databases · expat · 来源: geo.mirror.pkgbuild.com

openSUSE zypper已验证 · 92%

sudo zypper install expat

openSUSE Tumbleweed package metadata · expat · 来源: download.opensuse.org

概览

软件包摘要

XML 1.0 parser

项目链接

命令和别名

xmlwf

历史

项目历史与用法

Expat is a fast streaming XML parser library written in C, with xmlwf as its command-line well-formedness checker. It is package-manager-famous because XML parsing became infrastructure, and Expat is small, MIT-licensed, embeddable, and widely shipped.

项目历史

The official repository describes Expat as a C99 library for parsing XML 1.0, started by James Clark in 1997. Its model is event-oriented: users register handlers before parsing, and those handlers are called as document structures are discovered.

The project site frames Expat around streaming rather than building a full in-memory document tree. That makes it useful for files too large to fit in memory, and for applications where parser performance and flexible callbacks are more important than a high-level DOM interface.

采用历史

The Expat homepage states that numerous applications, libraries, and hardware use Expat, that bindings and third-party wrappers exist, and that Expat is packaged everywhere. That breadth is the key adoption story: many users never invoke xmlwf directly, but they depend on Expat through another program or language runtime.

The repository README documents common build-system integration, including CMake find_package usage. That is a sign of mature library adoption: Expat is not just an executable in package managers, but a dependency with headers, link targets, and ABI expectations.

使用方式

Developers use libexpat when they want a C XML parser that calls application-defined handlers for starts, ends, character data, and related XML structures. The included xmlwf executable is used to check whether XML input is well formed.

Because XML parsers sit at input boundaries, Expat's package history is often security-driven. The official GitHub issue tracker includes release coordination that references downstream updates in CPython, Gentoo, Spack, Homebrew, NixOS, MSYS2, and other packaging ecosystems when CVE fixes land.

为什么软件包爱好者会关心

Expat is a dependency-package archetype: boring when healthy, urgent when vulnerable. It is small enough to be embedded or vendored, but important enough that a security update can ripple through Python, Linux distributions, language package sets, and embedded builds.

The package also demonstrates the difference between library identity and command identity. Homebrew exposes xmlwf as the executable, while the real package value is libexpat and its headers.

时间线

1997: James Clark started Expat.
2.4.x: Security releases triggered broad downstream package updates.
2025: Expat 2.7.2 release coordination referenced Homebrew, CPython, NixOS, MSYS2, Spack, Gentoo, and other downstreams.
2026: Expat 2.8.x release coordination continued around security fixes and downstream updates.

Related projects

CPython is a major downstream because Python includes pyexpat bindings and coordinates bundled Expat updates.
CMake's FindEXPAT module is an important integration path for C and C++ projects.
Other XML parsers are related by role, but Expat's official documentation emphasizes its streaming C API.

来源

安全态势

尚未找到受保护工具覆盖

没有找到 expat 的匹配本地密钥处理 manifest。Nucleus 软件包元数据仍在此发布，以便未来覆盖拥有稳定的软件包 URL。

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 6 个平台目标。

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
`xmlwf`	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2026-07-10

管理器版本2.8.2

管理器更新时间2026-06-25

本地数据OK

上游not checked

检测到的最新版本未检测到

https://github.com/libexpat/libexpat

信息No cached GitHub release or tag data was available.https://github.com/libexpat/libexpatnone 置信度

安装元数据

软件包元数据

软件包键	brew:expat
版本	2.8.2
软件包管理器	Homebrew
软件包管理器页面	https://formulae.brew.sh/formula/expat
主页	https://libexpat.github.io/
仓库	https://github.com/libexpat/libexpat
上游文档	https://libexpat.github.io/doc
许可证	MIT
源码归档	https://github.com/libexpat/libexpat/releases/download/R_2_8_2/expat-2.8.2.tar.xz
最后更新	2026-06-25T21:42:09Z
Pulse	updated
Bottle	可用 (于 arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, 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	expat
Version Scheme	0
Revision	0
Head Version	HEAD
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	yes
URL Keys	head 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%

expat 2.7.1-2

XML parsing C library - example application