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/**
* This file is a derivative work of wrangler by Cloudflare
* An upstream request for exposing this API was made here:
* https://github.com/cloudflare/workers-sdk/issues/3897
*
* Until further notice, we will be using this file as a workaround
* TODO: Tackle this file, once their is an decision on the upstream request
*/
import TOML from '@iarna/toml';
import dotenv from 'dotenv';
import { findUpSync } from 'find-up';
import * as fs from 'node:fs';
import { dirname, resolve } from 'node:path';
function findWranglerToml(
referencePath: string = process.cwd(),
preferJson = false
): string | undefined {
if (preferJson) {
return (
findUpSync(`wrangler.json`, { cwd: referencePath }) ??
findUpSync(`wrangler.toml`, { cwd: referencePath })
);
}
return findUpSync(`wrangler.toml`, { cwd: referencePath });
}
type File = {
file?: string;
fileText?: string;
};
type Location = File & {
line: number;
column: number;
length?: number;
lineText?: string;
suggestion?: string;
};
type Message = {
text: string;
location?: Location;
notes?: Message[];
kind?: 'warning' | 'error';
};
class ParseError extends Error implements Message {
readonly text: string;
readonly notes: Message[];
readonly location?: Location;
readonly kind: 'warning' | 'error';
constructor({ text, notes, location, kind }: Message) {
super(text);
this.name = this.constructor.name;
this.text = text;
this.notes = notes ?? [];
this.location = location;
this.kind = kind ?? 'error';
}
}
const TOML_ERROR_NAME = 'TomlError';
const TOML_ERROR_SUFFIX = ' at row ';
type TomlError = Error & {
line: number;
col: number;
};
function parseTOML(input: string, file?: string): TOML.JsonMap | never {
try {
// Normalize CRLF to LF to avoid hitting https://github.com/iarna/iarna-toml/issues/33.
const normalizedInput = input.replace(/\r\n/g, '\n');
return TOML.parse(normalizedInput);
} catch (err) {
const { name, message, line, col } = err as TomlError;
if (name !== TOML_ERROR_NAME) {
throw err;
}
const text = message.substring(0, message.lastIndexOf(TOML_ERROR_SUFFIX));
const lineText = input.split('\n')[line];
const location = {
lineText,
line: line + 1,
column: col - 1,
file,
fileText: input,
};
throw new ParseError({ text, location });
}
}
export interface DotEnv {
path: string;
parsed: dotenv.DotenvParseOutput;
}
function tryLoadDotEnv(path: string): DotEnv | undefined {
try {
const parsed = dotenv.parse(fs.readFileSync(path));
return { path, parsed };
} catch (e) {
// logger.debug(`Failed to load .env file "${path}":`, e);
}
}
/**
* Loads a dotenv file from <path>, preferring to read <path>.<environment> if
* <environment> is defined and that file exists.
*/
export function loadDotEnv(path: string): DotEnv | undefined {
return tryLoadDotEnv(path);
}
function getVarsForDev(config: any, configPath: string | undefined): any {
const configDir = resolve(dirname(configPath ?? '.'));
const devVarsPath = resolve(configDir, '.dev.vars');
const loaded = loadDotEnv(devVarsPath);
if (loaded !== undefined) {
return {
...config.vars,
...loaded.parsed,
};
} else {
return config.vars;
}
}
export async function getEnvVars() {
let rawConfig;
const configPath = findWranglerToml(process.cwd(), false); // false = args.experimentalJsonConfig
if (!configPath) {
throw new Error('Could not find wrangler.toml');
}
// Load the configuration from disk if available
if (configPath?.endsWith('toml')) {
rawConfig = parseTOML(fs.readFileSync(configPath).toString(), configPath);
}
const vars = getVarsForDev(rawConfig, configPath);
return vars;
}
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