.gitignore exclusion is not working for a single file

Question

$ git --version
git version 2.6.4

I realize this is a duplicate but the other question\'s answers have not helped.

Folder structure

Answer 1

I has the similar problem with another .gitignore in subdirectory. For examaple:

- root
-- Subdir
--- gulpfile.js
--- .gitignore
-- .gitignore

In root .gitignore where two rules:

*.js
!gulpfile.js

And in Subdir/gulpfile.js where another one rule:

*.js

Because of that, Subdir/gulpfile.js where ignored. To solve problem it is required to remove Subdir/.gitignore, or add !gulpfile.js to Subdir/.gitignore.