macos-latest changed to arm64. It should not be hard to switch our setup
to cross-compiling x64 instead of arm64 but let's get master green again
first.
Expands on #3971 to do something useful even before the PR enters the
queue:
If stage0 changes are detected in the PR, set the changes-stage0 label
(which
has a tooltip to explain what this entail), and also remove the label if
it no
longer applies.
these need manual rebase merges by an admin, so lets prevent accidential
merges via the squashing merge queue.
---------
Co-authored-by: Sebastian Ullrich <sebasti@nullri.ch>
Reusing the best profiling UI out there
Usage:
```
lean -Dtrace.profiler=true -Dtrace.profiler.output=profile.json foo.lean ...
```
then open `profile.json` in https://profiler.firefox.com/.
See also `script/collideProfiles.lean` for minimizing and merging
profiles.
Previously we were suggesting rebasing onto the most recently nightly in
the branches history, but that is incorrect and we should *always*
suggest rebasing on `origin/nightly-with-mathlib`.
---------
Co-authored-by: Joachim Breitner <mail@joachim-breitner.de>
Previously, if there was a `nightly-testing-YYYY-MM-DD` tag at Std, but
not Mathlib, we were erroneously proceeding with Mathlib CI, and hence
using a probably-broken version of Mathlib.
On Windows, we now compile all core `.o`s twice, once with and without
`dllexport`, for use in the shipped dynamic and static libraries,
respectively. On other platforms, we export always as before to avoid
the duplicate work.
---------
Co-authored-by: tydeu <tydeu@hatpress.net>
This adds the concept of **functional induction** to lean.
Derived from the definition of a (possibly mutually) recursive function,
a **functional
induction principle** is tailored to proofs about that function. For
example from:
```
def ackermann : Nat → Nat → Nat
| 0, m => m + 1
| n+1, 0 => ackermann n 1
| n+1, m+1 => ackermann n (ackermann (n + 1) m)
derive_functional_induction ackermann
```
we get
```
ackermann.induct (motive : Nat → Nat → Prop) (case1 : ∀ (m : Nat), motive 0 m)
(case2 : ∀ (n : Nat), motive n 1 → motive (Nat.succ n) 0)
(case3 : ∀ (n m : Nat), motive (n + 1) m → motive n (ackermann (n + 1) m) → motive (Nat.succ n) (Nat.succ m))
(x x : Nat) : motive x x
```
At the moment, the user has to ask for the functional induction
principle explicitly using
```
derive_functional_induction ackermann
```
The module docstring of `Lean/Meta/Tactic/FunInd.lean` contains more
details on the
design and implementation of this command.
More convenience around this (e.g. a `functional induction` tactic) will
follow eventually.
This PR includes a bunch of `PSum`/`PSigma` related functions in the
`Lean.Tactic.FunInd`
namespace. I plan to move these to `PackArgs`/`PackMutual` afterwards,
and do some cleaning
up as I do that.
---------
Co-authored-by: David Thrane Christiansen <david@davidchristiansen.dk>
Co-authored-by: Leonardo de Moura <leomoura@amazon.com>
I deleted internal links that seemed to have the character of "TODO". I
think that the residual TODO is of little value, given that we plan a
big revamp and revision soon anyway, but I could do it some other way as
well.
Makes the LLVM triple of the current platform available to Lean code
towards a solution for #2754.
Defaults to the empty string if the compiler is not clang, which can
introduce some divergence between CI and local builds but should not be
noticeable in most cases and is not really possible to avoid.
Currently we create `lean-pr-testing-NNNN` branches at Mathlib
automatically for each Lean PR.
We don't automatically create one at Std; mostly simply because Std
fails less often, so it has been okay to do this manually as needed. It
is conceptually simpler, however, if this is done uniformly.
This PR:
* does not proceed with Std/Mathlib CI unless the appropriate
`nightly-testing-YYYY-MM-DD` tag exists at Std (like it already doesn't
proceed if that tag is missing at Mathlib)
* creates `lean-pr-testing-NNNN` branches at Std
* when it creates `lean-pr-testing-NNNN` branches at Mathlib, updates
the Std dependency to use the `lean-pr-testing-NNNN` branch at Std
- [x] depends on #3199
Note that because most users do not have write access at Std, in order
to make updates to `lean-pr-testing-NNNN` branches there they will need
to make PRs. These will be merged with a very low bar, and feel free to
ping me for assistance on this. If this is annoying we will automate.
Also, frequent contributors to Lean may ask @digama0 or @joehendrix for
write access in order to easily work on these branches.
This PR requires that we have a secret here with write access at Std.
I'm arranging that [on
zulip](https://leanprover.zulipchat.com/#narrow/stream/348111-std4/topic/bot.20access/near/416686090).
I will update the documentation at
https://leanprover-community.github.io/contribute/tags_and_branches.html
to reflect these changes when they are merged.
---------
Co-authored-by: Joachim Breitner <mail@joachim-breitner.de>
As discussed during the FRO meeting 2024-01-18, we are changing the
`nightly-testing-YYYY-MM-DD` branches at Std and Mathlib from branches
to tags, in:
* https://github.com/leanprover/std4/pull/545
* https://github.com/leanprover-community/mathlib4/pull/9842
This PR updates the script that creates the `lean-pr-testing-NNNN`
branches at Mathlib so it is agnostic about whether
`nightly-testing-YYYY-MM-DD` will be a branch or a tag.
---------
Co-authored-by: Joachim Breitner <mail@joachim-breitner.de>
I keep messing things up, so time for some guard rails, so check them
using
[actionlint](https://github.com/raven-actions/actionlint).
This also runs [shellcheck](https://www.shellcheck.net/) on the files.
Shellcheck
is a bit picky about putting double quotes around variables, and will
flag many
cases where we know it’s safe, but why not simply always write the safer
variant.
Unfortunately, actionlint does not (yet) check `actions/github-script`
scripts, which is
unfortunate. Maybe they will in the future
(https://github.com/rhysd/actionlint/issues/389)
this didn’t recognize the new comments with an intro, and thus the bot
would post multiple comments.
The code was also out of sync with mathlib, fixing.
The `first(…)` in the `jq` program makes it more robust in case this
went wrong once (as on #3171) and there are now multiple PRs matching.
When looking at a PR I sometimes wonder which `nightly` release is this
based on, and is used for the mathlib testing.
Right now, the action uses a label (`toolchain-available`) for this, but
a label cannot easily carry more information.
It seems a rather simple way to communicate extra information is by
setting [commit
statuses](https://docs.github.com/en/rest/commits/statuses?apiVersion=2022-11-28#create-a-commit-status);
with this change the following statuses will appear in the PR:
One could also use
[checks](https://docs.github.com/en/rest/checks/runs?apiVersion=2022-11-28#create-a-check-run)
to add more information, even with a nicely formatted markdown
description as in [this
example](https://github.com/nomeata/lean4/pull/1/checks?check_run_id=20165137082),
but it seems there you can’t set a summary that’s visible without an
extra click, and Github seems to associate these checks to “the first
workflow”, which is odd. So using statuses seems fine here.
Often one uses bots writing PR comments for this purpose, but that's a
bit noisy (extra notifications etc.), especially for stuff that happens
on every PR, but isn’t always interesting/actionable
If this works well, we can use this for more pieces of information, and
a link can be added as well.
given that we now use the PR description as the commit message, the PR
template should point that out. Also, a `# Summary` is relatively
strange in a commit message, so removed it.
---------
Co-authored-by: Scott Morrison <scott.morrison@gmail.com>
Getting the original PR number from a `workflow_run` cleanly and
reliably seems to be
basically impossible. See
<https://github.com/orgs/community/discussions/25220> for a discussion.
So for now let’s go back to the working state, even though it’s
deprecated and throws warnings.
#3066 is causing CI failures, e.g.
[here](https://github.com/leanprover/lean4/actions/runs/7202184616/job/19619827364).
Although there are plenty of examples of using `await` in a Github
workflow script block, the error *seems* to be about this. This refactor
hopefully works around that, but I'm still uncertain of a root cause.
This fixe a surprisingly embarrassing bug introduced by me in
fa26d222cb (maybe while testing).
Enable more debug output while we are at it, to find out why sometimes
`context.payload.workflow_run.pull_requests[0]` is undefined.
