index.js

#!/usr/bin/env node

// run the commit till a post commit hook
const inquirer = require('inquirer');
const shell = require('shelljs');
const chalk = require('chalk');

function getPair() {
    const foo = shell.exec('git about | grep "git user"', { silent: true }) || '';
    return chalk.cyan(foo.split(':')[1].trim());
}

async function isCommitAmend() {
    const gitDiff = await shell.exec('git diff --cached', { silent: true });
    return gitDiff.trim() === '';
}

async function isInteractiveRebase() {
    const branchName = await shell.exec('git branch | grep "*" | sed "s/* //"')
    return branchName === '(no branch)'
}

async function shouldIRun() {
    const isamend = await isCommitAmend();
    const isIntRebase = await isInteractiveRebase();
    return (!isamend || !isIntRebase); // neither interactive rebase nor commit amend
}

let originalPair, currentPair;
currentPair = originalPair = getPair();
if (originalPair.split(' ').includes('and')) {
    currentPair = `pair ${currentPair}`;
}

let shouldICommitPrompt = {
    type: 'confirm',
    name: 'shouldICommit',
    message: `Are you sure you want to commit as ${currentPair}?`,
};

let initialsInput = {
    type: 'input',
    name: 'initials',
    message: 'What initial(s) would you like to use?',
    validate(value = '') {
        const initials = value.split(' ').filter(i => i.length === 2); // checks initials are exactly 2 characters long
        const pass = initials.length === 1 || initials.length === 2; // if there is 1 or 2 sets of initials
        if (pass) {
            console.error('\n');
            return true
        } else {
            console.log('\nSorry please enter valid initials.');
        }
    },
};

async function executeHook() {
    if (await shouldIRun()) {
        inquirer.prompt(shouldICommitPrompt).then((answer) => {
            if (answer.shouldICommit) {
                console.error('Great!');
                shell.exit(0); // Success
            }
            inquirer.prompt(initialsInput).then((input) => {
                shell.exec(`git pair ${input.initials}`);
                currentPair = getPair();
                let modifier = (currentPair !== originalPair) ? 'set to' : 'remains';
                shell.echo(`\nGit pair ${modifier} ${currentPair}\n`);
            }).then(() => {
                inquirer.prompt({
                    type: 'confirm',
                    name: 'confirmPair',
                    message: `Proceed with pair ${currentPair}?`,
                }).then((answer) => {
                    if (answer.confirmPair) {
                        const commitCommand = 'git commit --amend --reset-author --no-edit -n';
                        shell.echo(chalk.cyan(`${commitCommand}\n`));
                        shell.exec(commitCommand);
                        shell.exit(0); // Success
                    } else {
                        console.log('That\'s ok. Execute', chalk.cyan('npm run pairs-hook'), 'to try again.')
                    }
                })
            })
        });
    }
}

executeHook();