How to ignore directories with Composer?

Question

This is not possible in Composer. However, there are some ways to do it:

When you run the update or install command with --prefer-dist, Composer tries to download the archive on github. You can remove the test directory from the archives by putting this in a .gitattributes file in the root directory of your project:
```
Tests/ export-ignore
```
Composer will only use the tags on github. Just temporary remove the tests directory when creating a tag will also do the trick.