ci: add daily job to update nightly rustc

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Andrew Poelstra 2024-02-20 14:55:59 +00:00
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name: Update Nightly rustc
on:
schedule:
- cron: "0 0 * * *" # runs daily at 00:00
workflow_dispatch: # allows manual triggering
jobs:
format:
name: Update nightly rustc
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- uses: dtolnay/rust-toolchain@nightly
- name: Update rust.yml to use latest nightly
run: |
set -x
# Not every night has a nightly, so extract the date from whatever
# version of the compiler dtolnay/rust-toolchain gives us.
NIGHTLY_DATE=$(rustc +nightly --verbose --version | sed -ne 's/^commit-date: //p')
# Update the nightly version in the reference file.
echo "nightly-${NIGHTLY_DATE}" > .github/nightly-version
echo "nightly_date=${NIGHTLY_DATE}" >> $GITHUB_ENV
# Some days there is no new nightly. In this case don't make an empty PR.
if ! git diff --exit-code > /dev/null; then
echo "Updated nightly. Opening PR."
echo "changes_made=true" >> $GITHUB_ENV
else
echo "Attempted to update nightly but the latest-nightly date did not change. Not opening any PR."
echo "changes_made=false" >> $GITHUB_ENV
fi
- name: Create Pull Request
if: env.changes_made == 'true'
uses: peter-evans/create-pull-request@v6
with:
author: Update Nightly Rustc Bot <bot@example.com>
title: Automated daily update to rustc (to nightly-${{ env.nightly_date }})
body: |
Automated update to Github CI workflow `rust.yml` by [create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub action
commit-message: Automated update to Github CI to rustc nightly-${{ env.nightly_date }}