const path = require('path');
const exec = require('child_process').exec;

const antlr4 = path.resolve(__dirname, 'antlr-4.8-complete.jar');
const grammars = path.resolve(__dirname, '../src/grammar');
const output = path.resolve(__dirname, '../src/lib');

const entry = [
    'generic',
    'hive',
    'plsql',
    'spark',
    'impala',
];

entry.forEach((language) => {
    const cmd = `
        java -jar ${antlr4}
        -Dlanguage=JavaScript 
        -visitor
        -listener
        -o ${output}/${language}
        ${grammars}/${language}/*.g4 
    `.replace(/\n/g, '');
    console.log('cmd:', cmd);
    exec(cmd, (err) => {
        if (err) {
            console.error('Antlr4 build error: ' + language, err);
        } else {
            console.log(`Build ${language} success.`);
        }
    });
});