# Install asmfmt with Homebrew, MacPorts, Nix

Go Assembler Formatter. Version 1.3.2 via Homebrew; verified 2026-07-25. Also installable with nix: nix profile install nixpkgs#asmfmt.

## Install

```sh
sudo av install brew:asmfmt
```

Additional install commands:

### macOS

- Homebrew (100%):

```sh
brew install asmfmt
```

  Evidence: local Homebrew formula metadata

- MacPorts (94%):

```sh
sudo port install asmfmt
```

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

### Linux

- Nix (92%):

```sh
nix profile install nixpkgs#asmfmt
```

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

## Package facts

- **Package key:** brew:asmfmt
- **Package manager:** Homebrew
- **Version:** 1.3.2
- **Source summary:** Go Assembler Formatter
- **Homepage:** <https://github.com/klauspost/asmfmt>
- **Repository:** <https://github.com/klauspost/asmfmt>
- **Last updated:** 2026-07-25T14:18:26-04:00
- **Generated:** 2026-08-03T19:37:03+00:00

## Executables

- asmfmt (alias)

## Install behavior

- Bottle: not available

## Freshness

- Page generated: 2026-08-03
- Package-manager version: 1.3.2
## Project history and usage

asmfmt is a formatter for Go assembler files. Its README frames the project directly as `gofmt` for assembler code and documents `gofmt`-like flags such as `-d`, `-l`, and `-w`.

### Project history

The GitHub repository was created in November 2015, and the first GitHub release, v1.0, was published in April 2016. The README's dated update log records many early formatting fixes around comments, macros, semicolons, and Go assembler syntax.

By the README's own status note, asmfmt is stable and its formatting is expected to change only for bugs. Later releases in 2018, 2019, 2021, and 2022 focused on fixes, module information, and keeping the standalone formatter buildable.

### Adoption history

asmfmt is a niche Go ecosystem tool. It is available through Go install, GitHub releases, Homebrew, MacPorts, and Nix according to the input package facts. Homebrew analytics are small, reflecting that only developers who touch Go assembly files need it.

### How it is used

The tool is run as `asmfmt [flags] [path ...]` and should be pointed only at assembler files, because the README warns that non-assembler files cannot be positively identified and may be mangled. Editor integration examples include GoLand file watchers and Emacs before-save hooks.

### Why package nerds care

asmfmt is package-nerd interesting because it exports the Go ecosystem's formatter culture into the much smaller world of Plan 9 style Go assembly. It is a tiny binary with a stable output contract, exactly the sort of tool package managers like to preserve for reproducible developer workflows.

### Timeline

- 2015: GitHub repository created and early formatting updates logged.
- 2016: v1.0 and v1.1 GitHub releases published.
- 2018: v1.2.0 released.
- 2021: v1.3.x releases refreshed module and comment handling.
- 2022: v1.3.2 released.

### Related projects

- The README positions asmfmt as analogous to gofmt and links Go package documentation on pkg.go.dev.

### Sources

- <https://api.github.com/repos/klauspost/asmfmt>
- <https://api.github.com/repos/klauspost/asmfmt/releases>
- <https://formulae.brew.sh/api/formula/asmfmt.json>
- <https://github.com/klauspost/asmfmt#readme>
- source_facts.package-manager


## Security Notes

narrow executable package without higher-risk signals.

- **Geiger risk:** green / low
- narrow executable package without higher-risk signals

## Other Package-Manager Records

- Nix - asmfmt: normalized package name match | nixpkgs package indexes: pkgs/by-name/as/asmfmt/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1
- MacPorts - asmfmt: normalized package name match | MacPorts ports tree: devel/asmfmt/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1


## Combined YAML source

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


## Sources

- 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