macOS
Homebrewverified · 100%
brew install cmark-gfmlocal Homebrew formula metadata
MacPortsverified · 94%
sudo port install cmark-gfmMacPorts ports tree · devel/cmark-gfm/Portfile · source: api.github.com
brew
Install cmark-gfm with Homebrew, apt, MacPorts, Nix, pacman
C implementation of GitHub Flavored Markdown. Version 0.29.0.gfm.13 via Homebrew; verified from local package data.
install
Additional install commands
Linux
Debian aptverified · 92%
sudo apt install cmark-gfmDebian stable package indexes · cmark-gfm · source: deb.debian.org
Nixverified · 92%
nix profile install nixpkgs#cmark-gfmnixpkgs package indexes · pkgs/by-name/cm/cmark-gfm/package.nix · source: api.github.com
Arch Linux pacmanverified · 92%
sudo pacman -S cmark-gfmArch Linux sync databases · cmark-gfm · source: geo.mirror.pkgbuild.com
overview
Package summary
C implementation of GitHub Flavored Markdown
Project links
Commands and aliases
- cmark-gfm
history
Project history and usage
cmark-gfm is GitHub's fork of cmark, extending the CommonMark C reference implementation with GitHub Flavored Markdown extensions. It provides GFM-specific libraries and binaries suffixed with -gfm so they can coexist with upstream cmark.
Project history
GitHub created the cmark-gfm repository in December 2016. The README states that the project adds GitHub Flavored Markdown extensions to the upstream CommonMark implementation, as defined by the GFM spec, while preserving much of the upstream cmark README.
Adoption history
The GFM spec says GitHub Flavored Markdown is the Markdown dialect supported for user content on GitHub.com and GitHub Enterprise. The batch input lists cmark-gfm packages for Homebrew, Debian, MacPorts, Nix, Arch/pacman, and Ubuntu, reflecting its role as the packaged local implementation of GitHub's Markdown dialect.
How it is used
Users run cmark-gfm or link against its library to parse Markdown with GitHub extensions such as tables, task list items, strikethrough, autolinks, and disallowed raw HTML behavior. The README also documents the inherited cmark AST, renderer, security, build, and test workflows.
Why package nerds care
cmark-gfm matters when a package needs GitHub-style Markdown rendering rather than plain CommonMark. The -gfm suffixing is package-manager friendly because it avoids collisions with upstream cmark while exposing GitHub's dialect as a reproducible command-line and library dependency.
Timeline
- 2016: GitHub creates the cmark-gfm repository.
- 2017: tag 0.27.1.gfm.0 marks an early public GFM release line.
- 2019: the GFM spec version 0.29-gfm is published.
- 2023: GitHub release 0.29.0.gfm.13 is published.
Related projects
- cmark-gfm is directly related to upstream cmark, the CommonMark spec, the GitHub Flavored Markdown spec, and libraries that wrap libcmark-compatible parsers.
Sources
security posture
Risk level: green
narrow executable package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- narrow executable package without higher-risk signals
Signals
- metadata:no-higher-risk-signals
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 12 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 |
|---|---|---|---|
cmark-gfm | 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 version0.29.0.gfm.13
manager updated
local dataok
upstreamnot checked
latest detectednot detected
https://github.com/github/cmark-gfm
- infoNo package-manager update timestamp was available.low confidence
- infoNo cached GitHub release or tag data was available.https://github.com/github/cmark-gfmnone confidence
install metadata
Package metadata
| Package key | brew:cmark-gfm |
|---|---|
| Version | 0.29.0.gfm.13 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/cmark-gfm |
| Homepage | https://github.com/github/cmark-gfm |
| Repository | https://github.com/github/cmark-gfm |
| Upstream docs | https://github.com/github/cmark-gfm#readme |
| License | BSD-2-Clause |
| Source archive | https://github.com/github/cmark-gfm/archive/refs/tags/0.29.0.gfm.13.tar.gz |
| Build dependencies | cmake |
| Bottle | available (on arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, 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 | cmark-gfm |
| Version Scheme | 0 |
| Revision | 0 |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
Debian apt95%
cmark-gfm 0.29.0.gfm.13-4
CommonMark parsing and rendering program, GitHub flavor
https://github.com/github/cmark
sudo apt install cmark-gfm- Section: text
- Architecture: amd64
- 3 dependencies
- normalized package name match
- Matched by: Cmark Gfm
Debian apt95%
libcmark-gfm-dev 0.29.0.gfm.13-4
CommonMark GitHub flavor gfm library dev files
https://github.com/github/cmark
sudo apt install libcmark-gfm-dev- Section: libdevel
- Architecture: amd64
- Source Package: cmark-gfm
- 1 dependencies
- normalized package name match
- Matched by: Cmark Gfm
Debian apt95%
libcmark-gfm-extensions-dev 0.29.0.gfm.13-4
CommonMark GitHub flavor gfm extensions library dev files
https://github.com/github/cmark
sudo apt install libcmark-gfm-extensions-dev- Section: libdevel
- Architecture: amd64
- Source Package: cmark-gfm
- 1 dependencies
- normalized package name match
- Matched by: Cmark Gfm
Debian apt95%
libcmark-gfm-extensions0.29.0.gfm.13 0.29.0.gfm.13-4
CommonMark GitHub flavor gfm extension library
https://github.com/github/cmark
sudo apt install libcmark-gfm-extensions0.29.0.gfm.13- Section: libs
- Architecture: amd64
- Source Package: cmark-gfm
- 2 dependencies
- normalized package name match
- Matched by: Cmark Gfm
Debian apt95%
libcmark-gfm0.29.0.gfm.13 0.29.0.gfm.13-4
CommonMark GitHub flavor gfm library
https://github.com/github/cmark
sudo apt install libcmark-gfm0.29.0.gfm.13- Section: libs
- Architecture: amd64
- Source Package: cmark-gfm
- 1 dependencies
- normalized package name match
- Matched by: Cmark Gfm
Nix95%
cmark-gfm
nix profile install nixpkgs#cmark-gfm- normalized package name match
- Matched by: Cmark Gfm
Ubuntu apt95%
cmark-gfm 0.29.0.gfm.6-6build1
CommonMark parsing and rendering program, GitHub flavor
https://github.com/github/cmark
sudo apt install cmark-gfm- Section: universe/text
- Architecture: amd64
- 3 dependencies
- normalized package name match
- Matched by: Cmark Gfm
Ubuntu apt95%
libcmark-gfm-dev 0.29.0.gfm.6-6build1
CommonMark GitHub flavor gfm library dev files
https://github.com/github/cmark
sudo apt install libcmark-gfm-dev- Section: universe/libdevel
- Architecture: amd64
- Source Package: cmark-gfm
- 1 dependencies
- normalized package name match
- Matched by: Cmark Gfm
Ubuntu apt95%
libcmark-gfm-extensions-dev 0.29.0.gfm.6-6build1
CommonMark GitHub flavor gfm extensions library dev files
https://github.com/github/cmark
sudo apt install libcmark-gfm-extensions-dev- Section: universe/libdevel
- Architecture: amd64
- Source Package: cmark-gfm
- 1 dependencies
- normalized package name match
- Matched by: Cmark Gfm
Ubuntu apt95%
libcmark-gfm-extensions0.29.0.gfm.6 0.29.0.gfm.6-6build1
CommonMark GitHub flavor gfm extension library
https://github.com/github/cmark
sudo apt install libcmark-gfm-extensions0.29.0.gfm.6- Section: universe/libs
- Architecture: amd64
- Source Package: cmark-gfm
- 2 dependencies
- normalized package name match
- Matched by: Cmark Gfm
Ubuntu apt95%
libcmark-gfm0.29.0.gfm.6 0.29.0.gfm.6-6build1
CommonMark GitHub flavor gfm library
https://github.com/github/cmark
sudo apt install libcmark-gfm0.29.0.gfm.6- Section: universe/libs
- Architecture: amd64
- Source Package: cmark-gfm
- 1 dependencies
- normalized package name match
- Matched by: Cmark Gfm
pacman95%
cmark-gfm 0.29.0.gfm.13-1
GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C
https://github.com/github/cmark
sudo pacman -S cmark-gfm- License: custom:BSD2
- Architecture: x86_64
- 1 dependencies
- normalized package name match
- Matched by: Cmark Gfm
MacPorts95%
cmark-gfm
sudo port install cmark-gfm- normalized package name match
- Matched by: Cmark Gfm
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.
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