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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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Henrik Böving 6e9bc1359d
fix: don't delay lake logging when cloning a dependency (#9332) 
This PR changes the dependency cloning mechanism in lake so the log
message that lake is cloning a
dependency occurs before it is finished doing so (and instead before it
starts). This has been a
huge source of confusion for users that don't understand why lake seems
to be just stuck for no
reason when setting up a new project, the output now is:
```
λ lake +lean4 new math math
info: downloading mathlib `lean-toolchain` file
info: math: no previous manifest, creating one from scratch
info: leanprover-community/mathlib: cloning https://github.com/leanprover-community/mathlib4
<hang>
info: leanprover-community/mathlib: checking out revision 'cd11c28c6a0d514a41dd7be9a862a9c8815f8599'
```
2025-07-15 09:38:35 +00:00
.github chore: CI: use faster Windows runners for releases (#9357) 2025-07-14 16:26:22 +00:00
doc chore: Grove: add some data (#9354) 2025-07-14 10:22:59 +00:00
images
nix chore: fix Nix build 2025-04-21 18:40:11 +02:00
releases_drafts chore: updates to release_checklist.md (#7817) 2025-04-04 03:45:36 +00:00
script chore: improvements to release automation (#9119) 2025-07-01 02:39:10 +00:00
src fix: don't delay lake logging when cloning a dependency (#9332) 2025-07-15 09:38:35 +00:00
stage0 chore: update stage0 2025-07-14 00:11:34 +00:00
tests fix: performance issue when elaborating match-expressions with many literals (#9372) 2025-07-15 03:52:23 +00:00
.gitattributes
.gitignore feat: further release automation (#9092) 2025-06-30 05:44:10 +00:00
.gitpod.Dockerfile chore: add gitpod configuration (#6382) 2024-12-15 21:38:13 +00:00
.gitpod.yml chore: add gitpod configuration (#6382) 2024-12-15 21:38:13 +00:00
.ignore
CMakeLists.txt chore: compile stage 0 against correct version string (#9085) 2025-06-29 20:52:46 +00:00
CMakePresets.json chore: fix reldebug preset (#8051) 2025-04-23 10:05:11 +00:00
CODEOWNERS chore: Update CODEOWNERS (#9232) 2025-07-07 13:11:41 +00:00
CONTRIBUTING.md doc: triage 2024-07-26 18:24:06 +02:00
flake.lock chore: robustify Nix shell (#8141) 2025-04-28 15:08:32 +00:00
flake.nix chore: robustify Nix shell (#8141) 2025-04-28 15:08:32 +00:00
lean-toolchain
lean.code-workspace chore: add the lean4 extension to the vscode workspace (#3059) 2023-12-14 08:58:21 +00:00
LICENSE
LICENSES feat: ship cadical (#4325) 2024-08-23 09:13:27 +00:00
README.md chore: remove old documentation site (#7974) 2025-05-14 14:31:33 +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 Setting Up Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean.