php version manager

pvm

#! node
// Simple node.js based PHP Version Manager
// Tested with v16.17.1

let process = require("process");
let [command = "help", version = ""] = process.argv.slice(2);
let fs = require("fs");
let { execSync } = require("child_process");

if (command === "help") {
  console.log(`
	PHP Version Manager
	Switch between installed PHP versions.
	The PHP versions themselves need to installed using Homebrew.

	Usage
	# Switch to [email protected]
	~ $(pvm use 8.0)

	# View all installed versions
	~ pvm list
	`);
  return;
}

const currentPath = execSync("echo $PATH").toString().trim();
const BREW_PREFIX = execSync("brew --prefix").toString().trim();
let installedVersions = fs
  .readdirSync(`${BREW_PREFIX}/opt/`, { encoding: "utf-8" })
  .filter((content) => content.startsWith("php"))
  .map((version) => version.replace("php@", ""))
  .map((version) => (version === "php" ? "default" : version));

if (["list", "ls"].includes(command)) {
  console.log(`${installedVersions.join("\n")}`);
}

if (command === "use" && installedVersions.includes(version)) {
  let phpPathPrefix = `${BREW_PREFIX}/opt/php`;
  let PATH = currentPath
    .split(":")
    .filter((path) => !path.startsWith(phpPathPrefix))
    .join(":");
  let versionPath = version === "default" ? "" : `@${version}`;
  let PHP = `${phpPathPrefix}${versionPath}/`;

  console.log(`export PATH=${PHP}bin:${PHP}sbin:${PATH}`);
} else {
  process.exit(1);
}