Function detectInstallMethodFromPaths

src/cli/commands/upgrade.ts:153–203

(
  pkgName: string,
  candidatePaths: string[],
)

}

export function detectInstallMethodFromPaths(
  pkgName: string,
  candidatePaths: string[],
): InstallMethod {
  const normalized = candidatePaths.map((p) => p.toLowerCase());

  const isNpx = normalized.some(
    (p) => p.includes('/_npx/') && p.includes(`/node_modules/${pkgName}/`),
  );
  if (isNpx) {
    return {
      kind: 'npx',
      manualInstructions: [
        'npx always fetches the latest version by default when using @latest.',
        'If you pinned a specific version, update the version in your MCP client config.',
      ],
    };
  }

  const isHomebrew = normalized.some(
    (p) => p.includes(`/cellar/${pkgName}/`) || p.includes(`/homebrew/cellar/${pkgName}/`),
  );
  if (isHomebrew) {
    return {
      kind: 'homebrew',
      manualCommand: `brew update && brew upgrade ${pkgName}`,
      autoCommands: [
        ['brew', 'update'],
        ['brew', 'upgrade', pkgName],
      ],
    };
  }

  const isNpmGlobal = normalized.some((p) => p.includes(`/node_modules/${pkgName}/`));
  if (isNpmGlobal) {
    return {
      kind: 'npm-global',
      manualCommand: `npm install -g ${pkgName}@latest`,
      autoCommands: [['npm', 'install', '-g', `${pkgName}@latest`]],
    };
  }

  return {
    kind: 'unknown',
    manualInstructions: [
      `Homebrew:   brew update && brew upgrade ${pkgName}`,
      `npm:        npm install -g ${pkgName}@latest`,
      `npx:        npx always fetches the latest when using @latest`,
    ],
  };
}

// --- Latest version lookup ---