git ignore all files of a certain type, except those in a specific subfolder

Question

I have a directory structure like this:

• root
  • folder1
    • abc.json
    • def.json
    • somedir
      • more.json

Answer 1

An optional prefix ! which negates the pattern; any matching file excluded by a previous pattern will become included again. If a negated pattern matches, this will override lower precedence patterns sources.

http://schacon.github.com/git/gitignore.html

*.json
!spec/*.json