Pre-publish POC to block "npm publish" from command line

pre-publish.js

"use strict";

const npm_config_argv = process.env.npm_config_argv;

if (!npm_config_argv) {
    console.error("This script should only be run via npm trigger -- npm_config_argv not found in ENV");
    process.exit(1);
}

let isInstall = false;
let isPublish = false;

// We will set the "is_running_publish_script" env in custom publish script
const isTriggeredByPublishScript = !!(process.env.is_running_publish_script);

try {
    let command = JSON.parse(npm_config_argv)
        .original // An array of invocation commands
        .map(function(c){return c.toLowerCase()});

    isInstall = command.indexOf("install") >= 0;
    isPublish = command.indexOf("publish") >= 0;

} catch (e) {
    console.error("This script should only be run via npm trigger -- npm_config_argv is not JSON or command missing");
    console.error(e);
    process.exit(1);
}

if (isPublish && !isTriggeredByPublishScript) {
    console.error("Please run 'scripts/publish.js' instead of 'npm publish'");
    process.exit(1);
}