createDevManifest.js

const fs = require("fs");

const manifestPath = "./ado-gh-codespaces-extension.json";
const newManifestPath = "./ado-gh-codespaces-extension-dev.json";

const ExtensionId = "ADOGitHubCodespaces";
const DevExtensionId = "ADOGitHubCodespacesDev";

const manifest = fs.readFileSync(manifestPath).toString();
const newManifest = JSON.parse(
  manifest.split(ExtensionId).join(DevExtensionId)
);

const addDev = (str) => {
  return str ? str + " (DEV)" : str;
};

const versionString = Date.now().toString();
const devManifestData = {
  baseUri: "https://localhost:3000",
  public: false,
  version: `${versionString.slice(0, 1)}.${versionString.slice(
    1,
    7
  )}.${versionString.slice(7, 13)}`,
  name: addDev(newManifest.name),
  description: addDev(newManifest.description),
  contributions: newManifest.contributions.map((contribution) => ({
    ...contribution,
    properties: {
      name: addDev(contribution.properties.name),
      text: addDev(contribution.properties.text),
      ...contribution.properties,
    },
    description: addDev(contribution.description),
  })),
};

fs.writeFileSync(
  newManifestPath,
  JSON.stringify(Object.assign({}, newManifest, devManifestData), null, 2)
);