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Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
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Wojciech Różowski eac9315962
feat: add deprecated_module (#13002) 
This PR adds a `deprecated_module` command that marks the current module
as deprecated. When another module imports a deprecated module, a
warning is emitted during elaboration suggesting replacement imports.

Example usage:
```lean
deprecated_module "use NewModule instead" (since := "2026-03-30")
```

The warning message is optional but recommended. The `since` parameter
is required. Warnings can be disabled, by setting
`linter.deprecated.module` option to false in the command line. Because
the check happens when importing , using `set_option
linter.deprecated.module` in the source file won't affect the warnings.
Instead, a whole file can be marked not to display depreciation
warnings, by putting a comment `deprecated_module: ignore` next to
`module` keyword. Similarly, individual keywords can be silenced.

A `#show_deprecated_modules` command is also provided for inspecting
which modules in the current environment are deprecated.
`linter.deprecated.module` has no effect on this command, and hence one
can view deprecated modules, even when having warnings silenced.
2026-04-01 14:40:43 +00:00
.claude chore: add safety notes to release command (#13225) 2026-04-01 05:01:00 +00:00
.github fix: make -DLEAN_VERSION_* CMake overrides actually work (#13226) 2026-04-01 05:31:23 +00:00
.vscode chore: replace workspace file with .vscode/ settings (#12770) 2026-03-04 01:10:04 +00:00
doc chore: strip binaries only in release builds (#13208) 2026-03-31 17:18:43 +00:00
images
releases_drafts chore: remove stale release draft notes (#12518) 2026-02-17 19:56:23 +00:00
script fix: make -DLEAN_VERSION_* CMake overrides actually work (#13226) 2026-04-01 05:31:23 +00:00
src feat: add deprecated_module (#13002) 2026-04-01 14:40:43 +00:00
stage0 chore: update stage0 2026-04-01 12:56:25 +00:00
tests feat: add deprecated_module (#13002) 2026-04-01 14:40:43 +00:00
.gitattributes chore: migrate more tests to new test suite (#12809) 2026-03-06 16:52:01 +00:00
.gitignore chore: replace workspace file with .vscode/ settings (#12770) 2026-03-04 01:10:04 +00:00
.gitpod.Dockerfile chore: add gitpod configuration (#6382) 2024-12-15 21:38:13 +00:00
.gitpod.yml chore: strip binaries only in release builds (#13208) 2026-03-31 17:18:43 +00:00
.ignore
CMakeLists.txt chore: use FetchContent for mimalloc source acquisition (#13196) 2026-03-31 18:00:39 +00:00
CMakePresets.json chore: strip binaries only in release builds (#13208) 2026-03-31 17:18:43 +00:00
CODEOWNERS chore: make @hargoniX code owner of the compiler (#10732) 2025-10-10 04:43:38 +00:00
CONTRIBUTING.md chore: migrate pkg tests (#12889) 2026-03-11 18:55:46 +00:00
flake.lock chore: update to c++20 (#12117) 2026-02-11 01:17:40 +00:00
flake.nix chore: add aarch64-darwin to flake (#12915) 2026-03-18 15:55:34 +00:00
lean-toolchain chore: relative lean-toolchains (#12652) 2026-02-25 10:23:35 +00:00
LICENSE
LICENSES feat: bundle leantar with Lean (#12822) 2026-03-09 20:10:59 +00:00
README.md doc: update URLs that are currently pointing to redirects (#10397) 2025-09-17 15:50:07 +00:00
RELEASES.md chore: updates to release_checklist.md (#7817) 2025-04-04 03:45:36 +00:00

README.md

This is the repository for Lean 4.

About

Installation

See Install Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean.