@netlify/config/lib/parse.js

Netlify config module

import { existsSync, promises as fs } from 'fs';
import { throwUserError } from './error.js';
import { throwOnInvalidTomlSequence } from './log/messages.js';
import { parseToml } from './utils/toml.js';
/**
 * Load the configuration file and parse it (TOML)
 * @param configPath The path to the toml file
 * @returns
 */
export const parseConfig = async function (configPath) {
    if (configPath === undefined) {
        return {};
    }
    if (!existsSync(configPath)) {
        throwUserError('Configuration file does not exist');
    }
    return await readConfigPath(configPath);
};
/**
 * Same but `configPath` is required and `configPath` might point to a
 * non-existing file.
 */
export const parseOptionalConfig = async function (configPath) {
    if (!existsSync(configPath)) {
        return {};
    }
    return await readConfigPath(configPath);
};
const readConfigPath = async function (configPath) {
    const configString = await readConfig(configPath);
    validateTomlBlackslashes(configString);
    try {
        return parseToml(configString);
    }
    catch (error) {
        throwUserError('Could not parse configuration file', error);
    }
};
/**
 * Reach the configuration file's raw content
 */
const readConfig = async function (configPath) {
    try {
        return await fs.readFile(configPath, 'utf8');
    }
    catch (error) {
        throwUserError('Could not read configuration file', error);
    }
};
const validateTomlBlackslashes = function (configString) {
    const result = INVALID_TOML_BLACKSLASH.exec(configString);
    if (result === null) {
        return;
    }
    const [, invalidTripleSequence, invalidSequence = invalidTripleSequence] = result;
    throwOnInvalidTomlSequence(invalidSequence);
};
/**
 * The TOML specification forbids unrecognized backslash sequences. However,
 * `toml-node` does not respect the specification and do not fail on those.
 * Therefore, we print a warning message.
 * This only applies to " and """ strings, not ' nor '''
 * Also, """ strings can use trailing backslashes.
 */
const INVALID_TOML_BLACKSLASH = /\n[a-zA-Z]+ *= *(?:(?:""".*(?<!\\)(\\[^"\\btnfruU\n]).*""")|(?:"(?!")[^\n]*(?<!\\)(\\[^"\\btnfruU])[^\n]*"))/su;