import { ExecOptionsWithStringEncoding, execSync } from 'child_process';
import { Log } from './types';

const options: ExecOptionsWithStringEncoding = {
    encoding: 'utf8',
};

const exec = (cmd: string): string => execSync(cmd, options).trim();

/**
 * Returns latest branch name.
 */
const getCurrentBranch = (log: Log) => {
    try {
        return exec('git rev-parse --abbrev-ref HEAD');
    } catch (e) {
        log.warn('Error getting branch.', e);
        return 'uknown branch';
    }
};

/**
 * Returns latest commit revision ID.
 */
const getCurrentRevision = (log: Log) => {
    try {
        return exec('git rev-parse HEAD');
    } catch (e) {
        log.warn('Error getting revision ID.', e);
        return 'uknown revision ID';
    }
};

/**
 * Returns latest tags.
 */
const getCurrentTags = (log: Log) => {
    try {
        return exec('git describe --tags --abbrev=0');
    } catch (e) {
        log.warn('No tags found.');
        return '';
    }
};

export {
    getCurrentBranch,
    getCurrentRevision,
    getCurrentTags,
};