Parse .ebignore rules and collect included/excluded files

collect-ebignore-files.rb

# get files (also hidden ones with dot prefix)
files = Dir.glob("{**/*}", File::FNM_DOTMATCH)

# Remove folders from array as (git)ignore doesn't care about empty folders
files = files.reject { |f| File.directory?(f) }

# Remove .ebignore itself
files = files.reject { |f| f == '.ebignore' }

# Read the .ebignore file
ebignore_path = File.join(Dir.pwd, '.ebignore')
ebignore_rules = File.readlines(ebignore_path)
ebignore_rules = ebignore_rules.reject {|line| line.empty? || line == "\n"}.reject {|line| line.start_with?('#')}.map {|line| line.strip}

# Arrays to store files
included_files = [] # a.k.a. files that will be zipped
excluded_files = [] # a.k.a. ignored files

# Go through each ebignore rule for file
files.each do |f|
  ebignore_rules.each do |ignore_pattern|

    # account for 'dir' and 'dir/' patterns
    if File.directory?(ignore_pattern.gsub(/^!/, ''))
      ignore_pattern.gsub!(/\/$/, '').concat('/**')
    end

    # handle inverted rules (e.g. !foo) and normal rules
    if ignore_pattern.start_with?('!')
      matches_rule = File.fnmatch(ignore_pattern.gsub(/^!/, ''), f, File::FNM_DOTMATCH)
      if matches_rule then included_files.push(f) end
    else
      matches_rule = File.fnmatch(ignore_pattern, f, File::FNM_DOTMATCH)
      if matches_rule then excluded_files.push(f) end
    end
  end
end

# Remove possible duplicates
included_files.uniq
excluded_files.uniq

# Not sure about this logic...? (have to test more)
# works at least for "include everything except"-type of .ebignore files, like:
# *
# !foo
# !bar
excluded_files = excluded_files.reject{ |e| included_files.include? e }

# Print out the results
puts "excluded = ignored files:"
puts excluded_files
puts ""
puts "included = files that are monitred by git:"
puts included_files