generates a slack formatted message with your current open github PRs

pr-slack.js

#!/usr/bin/env node


const p = require('child_process');


const resolveTitle = pr => {
    const prTitle = pr.title.replace(/OCMUI-\d+: /, '');
    // <url|text> is link notation in slack messages
    // (but it only works if you disable rich formatting!)
    // return `<${pr.url}|#${pr.number} - ${prTitle}>`
    return `${pr.url} #${pr.number} - ${prTitle}`
}

const resolvePriority = pr => {
    // keys: PR label, values: slack-emoji suffix
    const priorityTable = [
        ['high priority', 'high'],
        ['medium priority', 'medium'],
        ['low priority', 'low'],
    ];
    const priorityLabels = pr.labels
        .map(l => l.name)
        .filter(n => n.includes('priority'));
    const priorityKey = priorityTable.find(([l]) => (
        priorityLabels.includes(l)
    ))?.[1] ?? 'medium';
    return `priority: :priority-${priorityKey}:`
}

const resolveEffort = pr => {
    // keys: slack-emoji suffix, values: bracket ceiling
    const sizeBracketTable = [
        ['xl', Infinity],
        ['l', 20],
        ['m', 12],
        ['s', 5],
        ['xs', 1],
    ];
    const sizeKey = sizeBracketTable
        .reduce((acc, [k, v]) => (
            pr.files.length <= v ? k : acc
        ), '');
    return `effort: :size-${sizeKey}:`;
}

const resolveReviewers = pr => (
    `reviewers: ${pr.reviewRequests.map(r => `@${r.login}`).join(', ')}`
)

const buildPrItemContent = pr => (
    [
        resolveTitle(pr),
        resolvePriority(pr),
        resolveEffort(pr),
        resolveReviewers(pr),
    ].join(' | ')
)

const buildPrItem = (pr, prListSize) => (
    [
        // generate a list item if needed
        prListSize > 1 ? '- ' : '',
        buildPrItemContent(pr),
    ].join('')
)

const buildPrList = prListData => (
    prListData
        .map((pr, i, arr) => (
            buildPrItem(pr, arr.length)
        ))
        .join('\n')
)

const getPrListRawData = () => (
    p.execSync(
        `gh pr list \
        --search '(author:@me OR assignee:@me) draft:false' \
        --json 'number,title,reviewRequests,files,url,labels'`
    )
)

const parsePrListData = prListRawData => (
    JSON.parse(prListRawData.toString())
)

const getPrListData = () => (
    parsePrListData(getPrListRawData())
)

const buildMessage = () => {
    const prListData = getPrListData();
    if (!prListData.length) {
        return 'no open PRs found';
    }
    return [
        ':git:',
        buildPrList(prListData),
        ':octocat:',
    ].join('\n\n')
}

const main = () => (
    console.log(`
${buildMessage()}
`)
)


main();