A .gitignore parser for Go.

• parsing .gitignore files
• loading file trees with several .gitignore files
• fs.WalkDir WalkDirFunc implementation (and afero.Walk (see below))
• customizable ignore filename (instead of .gitignore)
• full compatibility with git
  As far as I could test it, it handles .gitignore files the same way as git.
  If you find an inconsistency with git, please create a new Issue.
  The goal is to provide the exact same .gitignore handling.

Note that this lib is currently beta and therefore may introduce breaking changes. However I don't think much will change.

n := nogo.New(nogo.DotGitRule)
if err := n.AddFromFS(wdfs, ".gitignore"); err != nil {
    panic(err)
}

match := n.Match(toSearch, isDir)
fmt.Println(match)

There is also an alternative MatchBecause method which returns also the causing rule if you need some context.

There exists a predefined rule to ignore any .git folder automatically.

n := nogo.New(nogo.DotGitRule)
if err := n.AddFromFS(wdfs, ".gitignore"); err != nil {
    panic(err)
}

NoGo can be used with fs.WalkDir. Just see the example walk. If you need to use another Walk function, you can build your own wrapper using the NoGo.WalkFunc function.

I intentionally did not include an afero walk to avoid a new dependency just because of afero-compatibility. However, you can easily build your own.
You can find an example for afero in the documentation of NoGo.WalkFunc.