63 lines
1.6 KiB
Bash
63 lines
1.6 KiB
Bash
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#!/usr/bin/env bash
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# See ./README.md for docs
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set -euo pipefail
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log() {
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echo "$@" >&2
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}
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if (( $# < 2 )); then
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log "Usage: $0 GITHUB_REPO PR_NUMBER"
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exit 99
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fi
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repo=$1
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prNumber=$2
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# Retry the API query this many times
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retryCount=5
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# Start with 5 seconds, but double every retry
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retryInterval=5
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while true; do
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log "Checking whether the pull request can be merged"
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prInfo=$(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/$repo/pulls/$prNumber")
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# Non-open PRs won't have their mergeability computed no matter what
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state=$(jq -r .state <<< "$prInfo")
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if [[ "$state" != open ]]; then
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log "PR is not open anymore"
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exit 1
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fi
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mergeable=$(jq -r .mergeable <<< "$prInfo")
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if [[ "$mergeable" == "null" ]]; then
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if (( retryCount == 0 )); then
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log "Not retrying anymore. It's likely that GitHub is having internal issues: check https://www.githubstatus.com/"
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exit 3
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else
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(( retryCount -= 1 )) || true
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# null indicates that GitHub is still computing whether it's mergeable
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# Wait a couple seconds before trying again
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log "GitHub is still computing whether this PR can be merged, waiting $retryInterval seconds before trying again ($retryCount retries left)"
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sleep "$retryInterval"
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(( retryInterval *= 2 )) || true
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fi
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else
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break
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fi
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done
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if [[ "$mergeable" == "true" ]]; then
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log "The PR can be merged"
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jq -r .merge_commit_sha <<< "$prInfo"
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else
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log "The PR has a merge conflict"
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exit 2
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fi
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