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Comments on How to configure .gitignore to ignore all files except a certain directory

Parent

How to configure .gitignore to ignore all files except a certain directory

+4
−0

MWE

In the terminal run:

mkdir mwe 
cd mwe

mkdir dir
touch f1.txt f2.pdf dir/f1.txt dir/f2.pdf

git init .

Create a .gitignore with:

*     # ignore all
!dir/ # except this directory

Problem

Git doesn't register this and all files are still ignored:

git status

But, a normal file pattern works:

*       # ignore all
!f1.txt # except this file

Question

How do I configure my .gitignore to ignore all except a certain directory?

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1 comment thread

Why not just make DIR the repository instead of MWE? (2 comments)
Post
+6
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From the docs

Example to exclude everything except a specific directory foo/bar (note the /* - without the slash, the wildcard would also exclude everything within foo/bar):

   $ cat .gitignore
   # exclude everything except directory foo/bar
   /*
   !/foo
   /foo/*
   !/foo/bar

Just do

/*
!/dir

Why this works (and yours doesn't)

When you exclude *, you end up excluding everything, directories and files alike. When you un-exclude dir, the files inside aren't un-excluded as well. This is why it doesn't appear to do anything. You can actually fix this by first un-excluding dir and then un-excluding everything in it like this:

*
!/dir
!/dir/**/*

By using /* though, it doesn't exclude everything, but only the top-level stuff. The files inside technically weren't excluded, but as long as the directory the files are in is excluded, the files won't be included.

Therefore, when you un-exclude dir, the files within (which hadn't been excluded) are included without a problem.

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1 comment thread

This does the trick and even better was in the man page! The question that remains though is what is ... (4 comments)
This does the trick and even better was in the man page! The question that remains though is what is ...
mcp‭ wrote over 2 years ago

This does the trick and even better was in the man page! The question that remains though is what is /*? That is the first mention of it in that manpage entry and it only says how the behavior differs, but what does it mean semantically?

celtschk‭ wrote over 2 years ago · edited over 2 years ago

It is a slash, followed by an asterisk. From the man page:

The slash / is used as the directory separator. Separators may occur at the beginning, middle or end of the .gitignore search pattern.

And:

If there is a separator at the beginning or middle (or both) of the pattern, then the pattern is relative to the directory level of the particular .gitignore file itself.

And:

An asterisk "*" matches anything except a slash.

So the slash at the beginning says that the pattern matches everything in the directory of .gitignore, and the asterisk says that everything in that place is matched.

Moshi‭ wrote over 2 years ago

I've updated my answer with some more information mcp‭, i hope that it explains what's happening here.

mcp‭ wrote over 2 years ago · edited over 2 years ago

Thank you both!

Moshi‭, that explains it very clearly! The example you gave was a tremendous help to my understanding.