sync_pytorch_canary #57661

	name: sync_pytorch_canary

	on:
	schedule:
	# Every 15 minutes
	- cron: "/15 * * *"
	# Have the ability to trigger this job manually through the API
	workflow_dispatch:

	jobs:
	sync-pytorch:
	strategy:
	matrix:
	ref: ["viable/strict"]
	runs-on: ubuntu-20.04
	env:
	PYTORCH_REF: ${{ matrix.ref }}
	steps:
	- name: Set up SSH
	env:
	PYTORCH_CANARY_SSH_PRIVATE_KEY: ${{ secrets.PYTORCH_CANARY_SSH_PRIVATE_KEY }}
	run: \|
	set -eu
	mkdir -p ~/.ssh
	echo "$PYTORCH_CANARY_SSH_PRIVATE_KEY" > ~/.ssh/id_rsa
	chmod 600 ~/.ssh/id_rsa
	- name: Clone pytorch
	uses: actions/checkout@v2
	with:
	repository: 'pytorch/pytorch'
	ref: ${{ matrix.ref }}
	submodules: 'recursive'
	path: 'pytorch'
	fetch-depth: 0 # pushing requires nonshallow checkout
	- name: Mirror push to pytorch/pytorch-canary
	run: \|
	set -eu
	export GIT_SSH_COMMAND="ssh -v -i ~/.ssh/id_rsa -o StrictHostKeyChecking=no"
	cd pytorch

	# This was previously just a git push --mirror from a bare pytorch/pytorch repo, but that ran into issues as
	# pytorch/pytorch has too many branches. We could go with a solution was derived from a StackOverflow:
	# https://stackoverflow.com/questions/54828301/git-error-when-pushing-remote-failed-to-report-status
	# that would look like
	# git gc
	# git push --tags git@github.com:pytorch/pytorch-canary.git
	# git branch -a --format "%(refname)" \| xargs -i bash -c "git symbolic-ref HEAD {} && git push git@github.com:pytorch/pytorch-canary"
	# OR we could just settle with pushing the default branch. So we'll do that instead.
	git push -f git@github.com:pytorch/pytorch-canary "${PYTORCH_REF}"

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