98 lines
3.1 KiB
Bash
98 lines
3.1 KiB
Bash
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#!/usr/bin/env bash
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# Requests reviews for a PR after verifying that the base branch is correct
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set -euo pipefail
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tmp=$(mktemp -d)
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trap 'rm -rf "$tmp"' exit
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SCRIPT_DIR=$(dirname "$0")
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log() {
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echo "$@" >&2
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}
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effect() {
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if [[ -n "${DRY_MODE:-}" ]]; then
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log "Skipping in dry mode:" "${@@Q}"
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else
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"$@"
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fi
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}
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if (( $# < 3 )); then
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log "Usage: $0 GITHUB_REPO PR_NUMBER OWNERS_FILE"
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exit 1
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fi
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baseRepo=$1
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prNumber=$2
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ownersFile=$3
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log "Fetching PR info"
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prInfo=$(gh api \
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-H "Accept: application/vnd.github+json" \
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-H "X-GitHub-Api-Version: 2022-11-28" \
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"/repos/$baseRepo/pulls/$prNumber")
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baseBranch=$(jq -r .base.ref <<< "$prInfo")
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log "Base branch: $baseBranch"
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prRepo=$(jq -r .head.repo.full_name <<< "$prInfo")
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log "PR repo: $prRepo"
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prBranch=$(jq -r .head.ref <<< "$prInfo")
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log "PR branch: $prBranch"
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prAuthor=$(jq -r .user.login <<< "$prInfo")
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log "PR author: $prAuthor"
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extraArgs=()
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if pwdRepo=$(git rev-parse --show-toplevel 2>/dev/null); then
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# Speedup for local runs
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extraArgs+=(--reference-if-able "$pwdRepo")
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fi
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log "Fetching Nixpkgs commit history"
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# We only need the commit history, not the contents, so we can do a tree-less clone using tree:0
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# https://github.blog/open-source/git/get-up-to-speed-with-partial-clone-and-shallow-clone/#user-content-quick-summary
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git clone --bare --filter=tree:0 --no-tags --origin upstream "${extraArgs[@]}" https://github.com/"$baseRepo".git "$tmp"/nixpkgs.git
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log "Fetching the PR commit history"
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# Fetch the PR
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git -C "$tmp/nixpkgs.git" remote add fork https://github.com/"$prRepo".git
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# This remote config is the same as --filter=tree:0 when cloning
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git -C "$tmp/nixpkgs.git" config remote.fork.partialclonefilter tree:0
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git -C "$tmp/nixpkgs.git" config remote.fork.promisor true
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# This should not conflict with any refs in Nixpkgs
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headRef=refs/remotes/fork/pr
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# Only fetch into a remote ref, because the local ref namespace is used by Nixpkgs, don't want any conflicts
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git -C "$tmp/nixpkgs.git" fetch --no-tags fork "$prBranch":"$headRef"
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log "Checking correctness of the base branch"
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if ! "$SCRIPT_DIR"/verify-base-branch.sh "$tmp/nixpkgs.git" "$headRef" "$baseRepo" "$baseBranch" "$prRepo" "$prBranch" | tee "$tmp/invalid-base-error" >&2; then
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log "Posting error as comment"
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if ! response=$(effect gh api \
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--method POST \
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-H "Accept: application/vnd.github+json" \
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-H "X-GitHub-Api-Version: 2022-11-28" \
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"/repos/$baseRepo/issues/$prNumber/comments" \
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-F "body=@$tmp/invalid-base-error"); then
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log "Failed to post the comment: $response"
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fi
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exit 1
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fi
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log "Getting code owners to request reviews from"
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"$SCRIPT_DIR"/get-reviewers.sh "$tmp/nixpkgs.git" "$baseBranch" "$headRef" "$ownersFile" "$prAuthor" > "$tmp/reviewers.json"
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log "Requesting reviews from: $(<"$tmp/reviewers.json")"
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if ! response=$(effect gh api \
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--method POST \
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-H "Accept: application/vnd.github+json" \
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-H "X-GitHub-Api-Version: 2022-11-28" \
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"/repos/$baseRepo/pulls/$prNumber/requested_reviewers" \
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--input "$tmp/reviewers.json"); then
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log "Failed to request reviews: $response"
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exit 1
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fi
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log "Successfully requested reviews"
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