Is there a way to glob a directory in Ruby but exc

Question

I want to glob a directory to post-process header files. Yet I want to exclude some directories in the project. Right now the default way is...

Dir["**/*.h"].each { |header|
    puts header
}

Seems inefficient to check each header entry manually if it's in an excluded directory.

Answer 1

There's FileList from the Rake gem (which is almost always installed by default, and is included in the standard library in Ruby 1.9):

files = FileList['**/*.h'].exclude('skip_me')

FileList has lots of functionality for working with globs efficiently.

You can find the documentation here: http://rake.rubyforge.org/classes/Rake/FileList.html

Answer 2

I know this is 4 years late but for anybody else that might run across this question you can exclude from Dir the same way you would exclude from Bash wildcards:

Dir["lib/{[!errors/]**/*,*}.rb"]

Which will exclude any folder that starts with "errors" you could even omit the / and turn it into a wildcard of sorts too if you want.

Answer 3

Don't use globbing, instead use Find. Find is designed to give you access to the directories and files as they're encountered, and you programmatically decide when to bail out of a directory and go to the next. See the example on the doc page.

If you want to continue using globbing this will give you a starting place. You can put multiple tests in reject or'd together:

Dir['**/*.h'].reject{ |f| f['/path/to/skip'] || f[%r{^/another/path/to/skip}] }.each do |filename|
  puts filename
end

You can use either fixed-strings or regex in the tests.

Answer 4

files = Dir.glob(pattern)
files -= Dir.glob("#{exclude}/**/*")

Answer 5

One way:

require 'find'

ignores = ['doc','test','specifications']

Find.find(ENV['HOME']) do |path|
  name = File.basename(path)
  if FileTest.directory?(path)
    if ignores.include?(name)
      Find.prune
    else
      next
    end
  else
    puts path if name =~ /.h$/
  end
end

Answer 6

this is similar to a few other answers just written a bit differently

Ill create an array that can be passed to a .each iteration or something else.

release_safelist = Dir.glob('*').reject{|file| (file == "softlinks") || (file == "ci") || (file.include? "SNAPSHOT")}

In this case im creating an array without files/dir named either ci, softlinks, or containing SNAPSHOT