GitHub PR waiting

ghwait

#!/usr/bin/env bash

# Exit on any error
set -o errexit -o pipefail -o noclobber -o nounset

function msg() {
    TYPE="$1"
    TEXT="$2"
    EXIT="${3:-}"

    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $TYPE: $TEXT"

    if [[ -n $EXIT ]]; then
        exit "$EXIT"
    fi
}

function usage() {
    EXIT="${1:-0}"

    echo "Usage: $0 [-a] [--help]"
    echo ''
    echo 'Options:'
    echo ' -a, --ignore-approvals  Do not wait for approvals'
    echo ' --help                  Show this helm message'
    echo ''
    echo 'Examples:'
    echo '# Create PR, wait for all checks and approvals and then merge it'
    echo "gh pr create -f && $0 && gh pr merge -sd"
    echo '# Create PR, wait for all checks, skip approvals and then merge it'
    echo "gh pr create -f && $0 -a && gh pr merge -sd --admin"

    exit "$EXIT"
}

function main() {
    # Define long and short options
    local LONGOPTS='ignore-approvals,help'
    local OPTIONS='ah'

    # Parse options
    # shellcheck disable=SC2155
    local PARSED=$(getopt --options=$OPTIONS --longoptions=$LONGOPTS --name "${0##*/}" -- "$@"; echo $?)
    # shellcheck disable=SC2206
    PARSED=($PARSED)

    # Check if getopt failed
    if [[ ${#PARSED[@]} -lt 2 ]] || [[ ${PARSED[-1]} != 0 ]]; then
        msg 'E' 'Execution failed'
        usage 1
    fi

    # Re-read parsed options
    set -- "${PARSED[@]:0:${#PARSED[@]}}"

    # Default values
    IGNORE_APPROVALS=0
    SHOW_USAGE=0

    # Process individual options
    while true; do
        case "$1" in
            -a|--ignore-approvals)
                IGNORE_APPROVALS=1
                shift
                ;;
            --help)
                SHOW_USAGE=1
                shift
                ;;
            --)
                shift
                break
                ;;
            *)
                msg 'E' 'This should never happened'
                usage 3
                ;;
        esac
    done

    # Show the help message and exit
    if [[ $SHOW_USAGE == 1 ]]; then
        usage
    fi

    # Wait for the PR to be created
    while [[ $(gh pr checks 2>&1 | grep -c 'no pull requests found') -gt 0 ]]; do
        msg 'I' 'Waiting for PR to be created'

        sleep 5
    done

    # Wait for the checks to start running
    while [[ $(gh pr checks 2>&1 | grep -c 'no checks reported') -gt 0 ]]; do
        msg 'I' 'Waiting for checks to start running'

        sleep 5
    done

    # Wait for the checks to finish
    while [[ $(gh pr checks | cut -f2 | grep -c 'pending') -gt 0 ]]; do
        msg 'I' 'Waiting for checks to finish'

        sleep 10
    done

    # Check if there is any check that failed
    if [[ $(gh pr checks | cut -f2 | grep -Pcv '(pass|skipping)') -gt 0 ]]; then
        msg 'E' 'PR checks failed' 1
    fi

    if [[ $IGNORE_APPROVALS == 0 ]]; then
        # Wait for approvals
        while [[ $(gh pr status --json reviewDecision --jq '.currentBranch.reviewDecision') == 'REVIEW_REQUIRED' ]]; do
            msg 'I' 'Waiting for approvals'

            sleep 10
        done
    fi

    msg 'I' 'PR can be merged now'
}

main "$@"