env-cmd
Version:
Executes a command using the environment variables in an env file
84 lines (83 loc) • 2.83 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const fs = require("fs");
const path = require("path");
const utils_1 = require("./utils");
const REQUIRE_HOOK_EXTENSIONS = ['.json', '.js'];
/**
* Gets the environment vars from an env file
*/
async function getEnvFileVars(envFilePath) {
const absolutePath = utils_1.resolveEnvFilePath(envFilePath);
if (!fs.existsSync(absolutePath)) {
const pathError = new Error(`Invalid env file path (${envFilePath}).`);
pathError.name = 'PathError';
throw pathError;
}
// Get the file extension
const ext = path.extname(absolutePath).toLowerCase();
let env = {};
if (REQUIRE_HOOK_EXTENSIONS.indexOf(ext) > -1) {
const possiblePromise = require(absolutePath); /* eslint-disable-line */
env = utils_1.isPromise(possiblePromise) ? await possiblePromise : possiblePromise;
}
else {
const file = fs.readFileSync(absolutePath, { encoding: 'utf8' });
env = parseEnvString(file);
}
return env;
}
exports.getEnvFileVars = getEnvFileVars;
/**
* Parse out all env vars from a given env file string and return an object
*/
function parseEnvString(envFileString) {
// First thing we do is stripe out all comments
envFileString = stripComments(envFileString.toString());
// Next we stripe out all the empty lines
envFileString = stripEmptyLines(envFileString);
// Merge the file env vars with the current process env vars (the file vars overwrite process vars)
return parseEnvVars(envFileString);
}
exports.parseEnvString = parseEnvString;
/**
* Parse out all env vars from an env file string
*/
function parseEnvVars(envString) {
const envParseRegex = /^((.+?)[=](.*))$/gim;
const matches = {};
let match;
while ((match = envParseRegex.exec(envString)) !== null) {
// Note: match[1] is the full env=var line
const key = match[2].trim();
const value = match[3].trim();
// remove any surrounding quotes
matches[key] = value
.replace(/(^['"]|['"]$)/g, '')
.replace(/\\n/g, '\n');
}
return matches;
}
exports.parseEnvVars = parseEnvVars;
/**
* Strips out comments from env file string
*/
function stripComments(envString) {
const commentsRegex = /(^#.*$)/gim;
let match = commentsRegex.exec(envString);
let newString = envString;
while (match != null) {
newString = newString.replace(match[1], '');
match = commentsRegex.exec(envString);
}
return newString;
}
exports.stripComments = stripComments;
/**
* Strips out newlines from env file string
*/
function stripEmptyLines(envString) {
const emptyLinesRegex = /(^\n)/gim;
return envString.replace(emptyLinesRegex, '');
}
exports.stripEmptyLines = stripEmptyLines;