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update.yml
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name: Update
on:
# Runs everyday at noon
schedule:
- cron: "0 12 * * *"
# Allow manual triggering
workflow_dispatch:
inputs:
lock:
type: boolean
default: true
description: Update flake.lock
generate:
type: boolean
default: true
description: Update generated files
# Allow one concurrent update per branch
concurrency:
group: "update-${{ github.ref_name }}"
cancel-in-progress: true
# Allow pushing and creating PRs
permissions:
contents: write
pull-requests: write
jobs:
update:
name: Update the flake inputs and generate options
runs-on: ubuntu-latest
timeout-minutes: 40
if: github.event_name != 'schedule' || github.repository == 'nix-community/nixvim'
env:
repo: ${{ github.repository }}
base_branch: ${{ github.ref_name }}
pr_branch: update/${{ github.ref_name }}
steps:
- name: Checkout repository
uses: actions/checkout@v4
with:
ssh-key: ${{ secrets.CI_UPDATE_SSH_KEY }}
- name: Install Nix
uses: cachix/install-nix-action@v30
with:
nix_path: nixpkgs=channel:nixos-unstable
github_access_token: ${{ secrets.GITHUB_TOKEN }}
- name: Configure git
run: |
git config user.name 'github-actions[bot]'
git config user.email '41898282+github-actions[bot]@users.noreply.github.com'
- name: Create update branch
run: |
git branch -D "$pr_branch" || echo "Nothing to delete"
git switch -c "$pr_branch"
- name: Get info on the current PR
id: open_pr_info
env:
GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
run: |
# Query for info about the already open update PR
info=$(
gh api graphql -F owner='{owner}' -F repo='{repo}' -F branch="$pr_branch" -f query='
query($owner:String!, $repo:String!, $branch:String!) {
repository(owner: $owner, name: $repo) {
pullRequests(first: 1, states: OPEN, headRefName: $branch) {
nodes {
number
url
}
}
}
}
' | jq --raw-output '
.data.repository.pullRequests.nodes[]
| to_entries[]
| "\(.key)=\(.value)"
'
)
if [[ -n "$info" ]]; then
echo "PR info:"
echo "$info"
echo "$info" >> $GITHUB_OUTPUT
else
echo "No PR is currently open"
fi
- name: Fetch current PR's branch
if: steps.open_pr_info.outputs.number
run: |
git fetch origin "$pr_branch"
git branch --set-upstream-to "origin/$pr_branch"
- name: Update flake.lock
id: flake_lock
if: inputs.lock || github.event_name == 'schedule'
run: |
old=$(git show --no-patch --format=%h)
nix flake update --commit-lock-file
new=$(git show --no-patch --format=%h)
if [ "$old" != "$new" ]; then
echo "body<<EOF" >> "$GITHUB_OUTPUT"
git show --no-patch --format=%b >> "$GITHUB_OUTPUT"
echo "EOF" >> "$GITHUB_OUTPUT"
fi
- name: Update generated files
id: generate
if: inputs.generate || github.event_name == 'schedule'
run: |
old=$(git show --no-patch --format=%h)
nix-build ./update-scripts -A generate
./result/bin/generate --commit
new=$(git show --no-patch --format=%h)
if [ "$old" != "$new" ]; then
body=$(git show --no-patch --format=%b)
echo "body<<EOF" >> "$GITHUB_OUTPUT"
if [ -n "$body" ]; then
# Multi-file changes are listed in the body
echo "$body" >> "$GITHUB_OUTPUT"
else
# Single-file changes are only in the summary,
# e.g. "generated: Updated none-ls.nix"
git show --no-patch --format=%s | \
sed -e 's/^generated:/-/' >> "$GITHUB_OUTPUT"
fi
echo "EOF" >> "$GITHUB_OUTPUT"
fi
- name: Apply commits from the open PR
id: re_apply
if: steps.open_pr_info.outputs.number
run: |
# The base is the most recent commit on the remote branch by github-actions[bot]
# This should be a flake.lock bump or a generated-files update
# We will cherry-pick all commits on the remote _after_ the $base commit
remote="origin/$pr_branch"
author_rxp='^github-actions\[bot\] <41898282+github-actions\[bot\]@users\.noreply\.github\.com>$'
base=$(git rev-list --author="$author_rxp" --max-count=1 "$remote")
commits=( $(git rev-list "$base..$remote") )
if [[ -n "$commits" ]]; then
echo "Applying ${#commits[@]} commits..."
echo "count=${#commits[@]}" >> $GITHUB_OUTPUT
git cherry-pick --strategy-option=theirs "${commits[@]}"
else
echo "Nothing to re-apply"
fi
- name: Check if there are differences to push
id: diff
run: |
if [[ -n "$pr_num" ]]; then
remote="origin/$pr_branch"
else
remote="origin/$base_branch"
fi
diff=( $(git diff --cached --name-only "$remote") )
if [[ -n "$diff" ]]; then
echo "${#diff[@]} files different to $remote"
for file in "${diff[@]}"; do
echo "- $file"
done
echo "count=${#diff[@]}" >> $GITHUB_OUTPUT
else
echo "No files are different to $remote"
fi
- name: Create or Update Pull Request
id: updated_pr
if: steps.diff.outputs.count
env:
GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
title: |
[${{ github.ref_name }}] Update flake.lock & generated files
body: |
## Flake lockfile
```
${{ steps.flake_lock.outputs.body || 'No changes' }}
```
## Generate
${{ steps.generate.outputs.body || 'No changes' }}
run: |
echo "Pushing to remote branch $pr_branch"
git push --force --set-upstream origin "$pr_branch"
if [[ -n "$pr_num" ]]; then
echo "Editing existing PR #$pr_num"
operation=updated
gh pr edit "$pr_num" --body "$body"
else
echo "Creating new PR"
operation=created
gh pr create \
--base "$base_branch" \
--title "$title" \
--body "$body"
fi
pr_info=$(
# Get info from `gh pr view`
gh pr view --json 'headRefName,number,url' --jq '
to_entries[]
| .key |=
# Rename headRefName -> branch
if . == "headRefName" then "branch"
else . end
| "\(.key)=\(.value)"
'
# Get additional info locally
echo "head=$(git rev-parse HEAD)"
echo "operation=$operation"
)
echo "PR Info:"
echo "$pr_info"
echo "$pr_info" >> $GITHUB_OUTPUT
- name: Print summary
if: steps.updated_pr.outputs.number
env:
pr_num: ${{ steps.updated_pr.outputs.number }}
pr_url: ${{ steps.updated_pr.outputs.url }}
pr_branch: ${{ steps.updated_pr.outputs.branch }}
head: ${{ steps.updated_pr.outputs.head }}
operation: ${{ steps.updated_pr.outputs.operation }}
re_apply_count: ${{ steps.re_apply.outputs.count }}
run: |
short=${head:0:6}
# stdout
echo "${short} pushed to ${pr_branch}"
echo "#${pr_num} was ${operation}: ${pr_url}"
( # markdown summary
echo "## ${{ github.ref_name }}"
echo
echo "\`${short}\` pushed to \`${pr_branch}\`"
echo
echo "[#${pr_num}](${pr_url}) was ${operation}."
echo
if [[ -n "$re_apply_count" ]]; then
echo "Re-applied $re_apply_count commits from the existing PR."
fi
echo
) >> $GITHUB_STEP_SUMMARY
- name: Print cancellation summary
if: (!steps.updated_pr.outputs.number)
env:
pr_num: ${{ steps.open_pr_info.outputs.number }}
pr_url: ${{ steps.open_pr_info.outputs.url }}
changes: ${{ steps.diff.outputs.count || '0' }}
re_apply_count: ${{ steps.re_apply.outputs.count }}
run: |
(
echo "## Not updated"
echo
echo -n "$changes files with differences compared to "
if [[ -n "$pr_num" ]]; then
echo "[#$pr_num]($pr_url)."
else
echo "\`$base_branch\`"
fi
echo
if [[ -n "$re_apply_count" ]]; then
echo "Re-applied $re_apply_count commits from the existing PR."
fi
echo
) >> $GITHUB_STEP_SUMMARY