enso/app/ide-desktop/utils.ts
Michał Wawrzyniec Urbańczyk bd3b778721
Replace webpack with esbuild (#3592)
This PR replaces webpack with esbuild, as our bundler.

The change leads to out-of-the-box ~5x improvement in bundling times, reducing the latency in watch-based workflows. 
Along with this a new development server (with live reload capacity) has been introduced to support watch command.

[ci no changelog needed]

### Important Notes
* workflow for checking docs has been removed because it was using outdated prettier version and caused troubles; while the same check is performed in a better way by the GUI/Lint job.
* introduced little more typescript in the scripts in place of js, usually with minimal changes.
2022-08-10 03:41:44 +02:00

63 lines
2.0 KiB
TypeScript

import path from 'node:path'
import fs from 'node:fs'
import process from 'node:process'
/**
* Get the environment variable value.
*
* @param {string} name The name of the environment variable.
* @returns {string} The value of the environment variable.
* @throws {Error} If the environment variable is not set.
*/
export function require_env(name: string) {
return (
process.env[name] ??
(() => {
throw Error(`Missing ${name} environment variable.`)
})()
)
}
/**
* Read the path from environment variable and resolve it.
*
* @param {string} name The name of the environment variable.
* @returns {string} The resolved path.
* @throws {Error} If the environment variable is not set.
*/
export function require_env_resolved_path(name: string) {
return path.resolve(require_env(name))
}
/**
* Read the path from environment variable and resolve it. Verify that it exists.
*
* @param {string} name The name of the environment variable.
* @returns {string} The resolved path.
* @throws {Error} If the environment variable is not set or path does not exist.
*/
export function require_env_path_exist(name: string) {
const value = require_env(name)
if (fs.existsSync(value)) return value
else throw Error(`File with path ${value} read from environment variable ${name} is missing.`)
}
/**
* Function fulfills after the given path denotes an existing, readable file.
*/
async function wait_until_readable(path: string) {
// This implementation (polling every 100ms) is crude but should be reliable.
// If such need arises, more refined implementation can be built using `fs.watch` api.
console.log(`Waiting for file ${path} to become readable.`)
while (true) {
try {
await fs.promises.access(path, fs.constants.R_OK)
return
} catch (err) {
await new Promise(resolve => setTimeout(resolve, 100))
}
}
}
export default { require_env, require_env_path_exist }