[Proposal] Implement a "Did you mean?" feature

[javiereguiluz]

If you don't provide a valid alias (e.g. "server" for "symfony/web-server-bundle") or Symfony package name (e.g. "monolog-bundle" for "symfony/monolog-bundle") or a Composer package name (e.g. "fabpot/flex"), you see this error:

$ composer req sec

  [InvalidArgumentException]
  Could not find package sec at any version for your minimum-stability (dev).
  Check the package spelling or your minimum-stability

This is what I expected:

$ composer req sec

  [InvalidArgumentException]
  Could not find package "sec". Did you mean: "security" or "security-checker"?

In practice:

• This would only work when the user input doesn't contain a "/". Otherwise they are trying to install a Composer package and we should not fix them (e.g. "sec" -> did you mean "security"? but "foo/sec" -> Composer error)
• This would only show the 2 or 3 best alternatives.
• If we don't want to easily disclose the available aliases, this would only work if the user typed at least 3 chars (to avoid typing "a" to get those aliases, then "b", etc.)

[fabpot]

It's not easy as the argument might be a package name or a version like in composer req twig 2.3. Here 2.3 is the version for Twig, not another package. Will see what I can do though.

[fabpot]

Fixed in b8bcfaf