cross-env/dist/command.js

Run scripts that set and use environment variables across platforms

import path from 'path';
import { isWindows } from "./is-windows.js";
/**
 * Converts an environment variable usage to be appropriate for the current OS
 * @param command Command to convert
 * @param env Map of the current environment variable names and their values
 * @param normalize If the command should be normalized using `path` after converting
 * @returns Converted command
 */
export function commandConvert(command, env, normalize = false) {
    if (!isWindows()) {
        return command;
    }
    const envUnixRegex = /\$(\w+)|\${(\w+)}/g; // $my_var or ${my_var}
    const convertedCmd = command.replace(envUnixRegex, (match, $1, $2) => {
        const varName = $1 || $2;
        // In Windows, non-existent variables are not replaced by the shell,
        // so for example "echo %FOO%" will literally print the string "%FOO%", as
        // opposed to printing an empty string in UNIX. See kentcdodds/cross-env#145
        // If the env variable isn't defined at runtime, just strip it from the command entirely
        return env[varName] ? `%${varName}%` : '';
    });
    // Normalization is required for commands with relative paths
    // For example, `./cmd.bat`. See kentcdodds/cross-env#127
    // However, it should not be done for command arguments.
    // See https://github.com/kentcdodds/cross-env/pull/130#issuecomment-319887970
    return normalize === true ? path.normalize(convertedCmd) : convertedCmd;
}