macOS
Homebrewverified · 100%
brew install litlocal Homebrew formula metadata
brew
Install lit with Homebrew, Nix, zypper
Portable tool for LLVM- and Clang-style test suites. Version 18.1.8 via Homebrew; verified 2026-06-22.
install
Additional install commands
Linux
Nixverified · 92%
nix profile install nixpkgs#litnixpkgs package indexes · lit · source: raw.githubusercontent.com
openSUSE zypperverified · 92%
sudo zypper install python311-litopenSUSE Tumbleweed package metadata · python311-lit · source: download.opensuse.org
overview
Package summary
Portable tool for LLVM- and Clang-style test suites
Project links
Commands and aliases
- lit
history
Project history and usage
lit, the LLVM Integrated Tester, is the portable test runner used for LLVM- and Clang-style test suites. It discovers tests, runs them in parallel, summarizes pass and failure results, and drives the small regression tests that are central to LLVM development.
Project history
lit developed inside the LLVM project as the project's Python-based test runner. The LLVM documentation describes it as lightweight, portable, and intentionally simple at the command line, while still flexible enough to support different test formats and suite layouts.
As LLVM grew into a family of compiler infrastructure projects, lit became part of the shared contributor workflow. The LLVM Testing Infrastructure Guide documents regression tests under `llvm/test`, `llvm-lit` invocations for individual files and directories, `check-*` build targets, and the use of lit configuration files such as `lit.cfg` and `lit.site.cfg.py`.
Adoption history
lit's adoption is unusually deep for a small Python test tool because it is carried by LLVM, Clang, LLD, MLIR, and downstream compiler projects. The PyPI package made the runner available outside a full LLVM checkout, while distribution packages such as Homebrew's `lit` make it convenient for projects that want LLVM-style tests without building all of LLVM.
How it is used
The common pattern is to put `RUN:` lines in test files, use FileCheck or project tools to validate output, and run suites through `lit`, `llvm-lit`, or build-system targets like `check-llvm` and `check-all`. lit's configuration files let projects define substitutions, features, test suffixes, environment settings, and custom formats.
Why package nerds care
lit matters to package maintainers because it is a tiny command whose real importance comes from compiler ecosystems. Packaging it separately lets downstream projects run conformance and regression tests without hauling in an entire LLVM build tree.
Timeline
- 2010-09-18: The `lit` package published version 0.1.0 on PyPI.
- 2024-06-25: PyPI recorded the 18.1.8 release of the standalone `lit` package.
- 2026: LLVM 23.0.0git documentation described lit as the LLVM Integrated Tester and documented response files, parallel execution, result output, and test-suite infrastructure.
Related projects
- Related projects include LLVM, Clang, LLD, MLIR, FileCheck, GoogleTest-based LLVM unit tests, and the LLVM test-suite repository.
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 1 platform targets.
- Installs with 1 runtime 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 |
|---|---|---|---|
lit | 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 version18.1.8
manager updated2026-06-22
local dataok
upstreamnot checked
latest detectednot detected
- infoRelease/tag comparison is only available for GitHub repositories.https://llvm.orgnone confidence
install metadata
Package metadata
| Package key | brew:lit |
|---|---|
| Version | 18.1.8 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/lit |
| Homepage | https://llvm.org |
| Repository | https://github.com/llvm/llvm-project |
| Upstream docs | https://llvm.org/docs/CommandGuide/lit.html |
| License | Apache-2.0 WITH LLVM-exception |
| Source archive | https://files.pythonhosted.org/packages/47/b4/d7e210971494db7b9a9ac48ff37dfa59a8b14c773f9cf47e6bda58411c0d/lit-18.1.8.tar.gz |
| Last updated | 2026-06-22T14:05:11-07:00 |
| Pulse | updated |
| Dependencies | python@3.14 |
| Bottle | available (on all) |
| Homebrew post-install | not defined |
| Service | none declared |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | lit |
| Version Scheme | 0 |
| Revision | 0 |
| Conflicts With |
|
| 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.
Nix95%
lit
nix profile install nixpkgs#lit- normalized package name match
- Matched by: Lit
zypper95%
python311-lit 18.1.8-1.3
A portable tool for executing test suites
sudo zypper install python311-lit- License: NCSA
- Category: Development/Tools/Other
- Architecture: noarch
- Source Package: lit
- 4 dependencies
- 4 provides
- normalized package name match
- Matched by: Lit
zypper95%
python313-lit 18.1.8-1.3
A portable tool for executing test suites
sudo zypper install python313-lit- License: NCSA
- Category: Development/Tools/Other
- Architecture: noarch
- Source Package: lit
- 4 dependencies
- 5 provides
- normalized package name match
- Matched by: Lit
zypper95%
python314-lit 18.1.8-1.3
A portable tool for executing test suites
sudo zypper install python314-lit- License: NCSA
- Category: Development/Tools/Other
- Architecture: noarch
- Source Package: lit
- 4 dependencies
- 4 provides
- normalized package name match
- Matched by: Lit
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