update #2525

	on:
	schedule:
	- cron: '30 7 * * *' # 8:30 AM CET/11:30 PM PT
	workflow_dispatch:

	name: update

	jobs:
	update:
	name: Auto-update mathlib4
	runs-on: mathport
	steps:
	- name: clean up
	run: \|
	rm -rf *
	rm -rf $HOME/.elan
	rm -rf $HOME/.cache/mathlib

	- name: install elan
	run: \|
	set -o pipefail
	curl -sSfL https://github.com/leanprover/elan/releases/download/v1.4.2/elan-x86_64-unknown-linux-gnu.tar.gz \| tar xz
	./elan-init -y --default-toolchain none
	echo "$HOME/.elan/bin" >> $GITHUB_PATH

	- uses: actions/checkout@v4

	- name: lake update
	id: update
	run: \|
	MATHLIB_NO_CACHE_ON_UPDATE=1 lake update
	if git describe --exact-match --tags HEAD 2> /dev/null \
	&& git diff --exit-code lake-manifest.json > /dev/null
	then
	echo "nothing_to_do=true" >> $GITHUB_OUTPUT
	fi

	- name: get cache
	if: success() && ${{ steps.update.outputs.nothing_to_do != 'true' }}
	run: lake exe cache get

	- name: build mathport
	if: success() && ${{ steps.update.outputs.nothing_to_do != 'true' }}
	run: lake build

	- name: push update commit
	if: success() && ${{ steps.update.outputs.nothing_to_do != 'true' }}
	run: \|
	git diff --exit-code && exit
	git config --global user.email "leanprover.community@gmail.com"
	git config --global user.name "leanprover-community-bot"
	git commit -am 'chore: bump mathlib'
	git push

	- name: clean up
	if: always()
	run: \|
	rm -rf *
	rm -rf $HOME/.elan
	rm -rf $HOME/.cache/mathlib

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