@applitools/eyes-storybook/src/utils/determineStorybookVersion.js

const {resolve} = require('path');
const {execSync} = require('child_process');
const fs = require('fs');
const findNpmModuleCommandPath = require('../findNpmModuleCommandPath');

async function determineStorybookVersion({packagePath, isWindows}) {
  let sbArg, storybookPath;

  const commandV6 = 'start-storybook' + (isWindows ? '.cmd' : '');
  const commandV7 = 'sb' + (isWindows ? '.cmd' : ''); // works for v8
  const commandV9 = 'storybook' + (isWindows ? '.cmd' : '');

  // first we look for the binaries in the local node_modules/.bin folder,
  // in case there are multiple versions of storybook installed
  for (const command of [commandV6, commandV7, commandV9]) {
    const storybookPathCommand = resolve(packagePath, 'node_modules/.bin', command);
    if (fs.existsSync(storybookPathCommand)) {
      storybookPath = storybookPathCommand;
      sbArg = command === commandV6 ? '' : 'dev';
      break;
    }
  }

  // the binary is not in the local node_modules/.bin folder,
  // so we need to find it, we do a fallback search up the tree
  if (!storybookPath) {
    for (const command of [commandV6, commandV7, commandV9]) {
      storybookPath = await findNpmModuleCommandPath(command, packagePath);
      if (storybookPath) {
        sbArg = command === commandV6 ? '' : 'dev';
        break;
      }
    }
  }

  if (!storybookPath) {
    throw new Error('Unable to determine storybook version, storybook path not found');
  }

  const sbVersion = execSync(`"${storybookPath}" ${sbArg ?? ''} --version`).toString();
  return {storybookPath, sbVersion, sbArg};
}
module.exports = determineStorybookVersion;