install

Additional install commands

macOS

Homebrewverified · 100%

brew install fastmod

local Homebrew formula metadata

MacPortsverified · 94%

sudo port install fastmod

MacPorts ports tree · devel/fastmod/Portfile · source: api.github.com

Linux

Nixverified · 92%

nix profile install nixpkgs#fastmod

nixpkgs package indexes · pkgs/by-name/fa/fastmod/package.nix · source: api.github.com

overview

Package summary

Fast, partial replacement for codemod (find/replace tool for programmers)

Project links

Commands and aliases

fastmod

history

Project history and usage

fastmod is a Rust command-line tool from Facebook Incubator for fast, regex-based, interactive find-and-replace across codebases.

Project history

The project was created publicly in 2018 as a fast partial replacement for Facebook's codemod. Its README is explicit that the design target is interactive review followed by applying a regex replacement broadly.

Adoption history

fastmod's adoption is concentrated among programmers doing large codebase refactors. It is primarily supported on macOS and Linux, installable with Cargo, and packaged by developer-oriented package managers.

How it is used

A typical invocation supplies a regex, replacement text, and files or directories to process. fastmod walks directories in parallel, respects ignore rules, shows colored diffs, and lets the user accept, reject, or edit changes.

Why package nerds care

fastmod is notable because it brings the ripgrep ecosystem's ignore and grep crates to codemod-style source editing: boring Unix CLI inputs, Rust speed, and human-reviewed patch application.

Timeline

2018: The public GitHub repository is created.
2020: v0.4.0 is released.
2023: v0.4.4 is released.

Related projects

fastmod is directly positioned as a partial replacement for codemod and uses Rust regex, ignore, and grep libraries.

Sources

security posture

Risk level: yellow

generalized runtime or code generation signal.

Risk classifier

yellow risk · medium confidence · runtime

Why

generalized runtime or code generation signal

Signals

text:repl

Install behavior

No Homebrew post-install hook is recorded in formula metadata.
Homebrew bottle metadata is available for 10 platform targets.
Build metadata lists 1 build dependencies.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

Command	Kind	Exposure	Note
`fastmod`	cli	global executable

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-07-08

manager version0.4.4

manager updated

local dataok

upstreamcurrent

latest detectedv0.4.4

https://github.com/facebookincubator/fastmod

infoNo package-manager update timestamp was available.low confidence

install metadata

Package metadata

Package key	brew:fastmod
Version	0.4.4
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/fastmod
Homepage	https://github.com/facebookincubator/fastmod
Repository	https://github.com/facebookincubator/fastmod
Upstream docs	https://github.com/facebookincubator/fastmod#readme
License	Apache-2.0
Source archive	https://github.com/facebookincubator/fastmod/archive/refs/tags/v0.4.4.tar.gz
Build dependencies	rust
Bottle	available (on arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, monterey, sonoma, ventura, x86_64_linux)
Homebrew post-install	not defined
Service	none declared

registry facts

Source database details

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	fastmod
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

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

Nix95%

fastmod

nix profile install nixpkgs#fastmod

normalized package name match
Matched by: Fastmod

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

MacPorts95%

fastmod

sudo port install fastmod

normalized package name match
Matched by: Fastmod

MacPorts ports tree · api.github.com · MacPorts ports tree: devel/fastmod/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Combined YAML source

View the package source record on GitHub.

combined/fastmod.yml

Used sources

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

Install fastmod with Homebrew, MacPorts, Nix