安装

其他安装命令

macOS

Homebrew已验证 · 100%

brew install fourmolu

local Homebrew formula metadata

Linux

Nix已验证 · 92%

nix profile install nixpkgs#fourmolu

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

概览

软件包摘要

Formatter for Haskell source code

项目链接

命令和别名

fourmolu

历史

项目历史与用法

Fourmolu is a formatter for Haskell source code. It is an Ormolu fork that keeps Ormolu's parser-driven, idempotent formatting goals while adding configurable style options through CLI flags and `fourmolu.yaml`.

项目历史

The repository was created in 2020 and describes itself as a fork of Ormolu with upstream improvements continually merged. The official README frames the project around one key departure from Ormolu: replacing the no-configuration style rule with configurable parameters.

The changelog shows a pattern of adding Fourmolu-specific configuration while also importing upstream Ormolu changes, including parser updates, formatting fixes, and support for new GHC language features.

采用历史

Fourmolu is adopted by Haskell projects that want automatic formatting but need policy knobs that Ormolu intentionally avoids. The README documents installation through GHCup, Cabal, Stack, release notes, editor integration through Haskell Language Server, and CI through the recommended `run-fourmolu` GitHub Action.

使用方式

Users run `fourmolu Module.hs` to print formatted output, `fourmolu -i` to rewrite files, or `fourmolu --mode check` in CI. Configuration can be written in `fourmolu.yaml`, discovered from parent directories and the XDG config directory, or passed as command-line options.

为什么软件包爱好者会关心

Fourmolu is a package-nerd case study in formatter governance. It forked an intentionally opinionated tool not to change the parser architecture, but to change the social contract around style configuration, while still tracking upstream Ormolu.

时间线

2020: The public `fourmolu/fourmolu` repository was created.
2023: v0.13.x and v0.14.x releases continued the configurable formatter line.
2024: v0.16.x added explicit configuration-file selection and upstream parser updates.
2025: v0.19.0.0 added options such as `haddock-location-signature` and `if-style`.
2026: v0.20.0.0 made Fourmolu installable with GHCup and added more import-grouping and record-style configuration.

Related projects

Fourmolu is directly related to Ormolu, GHC, ghc-lib-parser, Cabal, Stack, GHCup, Haskell Language Server, Hackage, and the `run-fourmolu` GitHub Action.

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 6 个平台目标。
安装时包含 1 个运行时依赖。
构建元数据列出 2 个构建依赖。

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。

local files

Configuration and credential file locations

These source-backed paths show where this package keeps local settings or durable credentials. Automic Vault can use them as review targets for secret scanning, migration, and command approval.

Configuration files

Config paths the tool may read or write during local use.

Unix: fourmolu.yaml

可执行文件

已安装的可执行文件

命令	类型	暴露范围	备注
`fourmolu`	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2026-07-24

管理器版本0.20.0.0

管理器更新时间2026-07-22

本地数据OK

上游not checked

检测到的最新版本未检测到

https://fourmolu.github.io/

信息Release/tag comparison is only available for GitHub repositories.https://fourmolu.github.io/none 置信度

安装元数据

软件包元数据

软件包键	brew:fourmolu
版本	0.20.0.0
软件包管理器	Homebrew
软件包管理器页面	https://formulae.brew.sh/formula/fourmolu
主页	https://fourmolu.github.io/
仓库	https://github.com/fourmolu/fourmolu
上游文档	https://fourmolu.github.io/
许可证	BSD-3-Clause
源码归档	https://hackage.haskell.org/package/fourmolu-0.20.0.0/fourmolu-0.20.0.0.tar.gz
最后更新	2026-07-22T05:23:32Z
Pulse	updated
依赖	gmp
构建依赖	cabal-install, ghc
macOS 提供的库	libffi
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	fourmolu
Version Scheme	0
Revision	0
Head Version	HEAD
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
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。

Nix95%

fourmolu

nix profile install nixpkgs#fourmolu

normalized package name match
匹配方式：Fourmolu

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

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/fourmolu.yml

使用的来源

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

使用 Homebrew, Nix 安装 fourmolu