import { writeFileSync } from 'fs';
import { dedent } from 'tslint/lib/utils';
import { promisify } from 'util';
import * as child from 'child_process';
const exec = promisify(child.exec);

async function createVersionsFile(filename: string) {
    let versionInfo = ''
    if(process.env.GITHUB_SHA){
        // we're in a github action

        versionInfo = process.env.GITHUB_REF_NAME
        if(process.env.GITHUB_REF_TYPE === 'branch'){
            versionInfo += `#${process.env.GITHUB_SHA}`
        }
    } else {
        const tag = (await exec('git describe --tags')).stdout.toString().trim();
        const branch = (await exec('git rev-parse --abbrev-ref HEAD')).stdout.toString().trim();

        versionInfo = (branch === 'master' ? tag : branch + '#' + tag)
    }



    const content = dedent`
      // this file is automatically generated by git.version.ts script
      export const versionInfo = {
        version: '${versionInfo}',
      };`;

    writeFileSync(filename, content, {encoding: 'utf8'});
}

createVersionsFile('src/environments/versions.ts');