Question

I need to find all strings, which contain <some_word>. There is MAIN directory, where we have to search and there can be files and other directroies (with files). It must enter one directory – check all files there for <some_word>, return to main directory – enter another directroy – check all files there, return to main directory… and so on and so for. I have no problems to make this, when there are only files in main directory… but don’t know how to make it with directories… please help me.

Answer 1

To process all files in a directory:

Dir['**/*'].each do |filepath|
  # filepath is a string path to the file or directory
  # relative from the working directory of the script
end

For more information, see the documentation for Dir.[] or Dir.glob.

Thus, if you already have find_text_in_file( some_word, filepath ) you can do:

Dir['**/*'].select{|f| File.file?(f) }.each do |filepath|
  find_text_in_file( some_word, filepath )
end

Note that the above will search the files in a depth-first traversal. If you want to search in a breadth-first manner you can instead use this:

files = Dir['**/*'].select{ |f| File.file?(f) }
files.sort_by{ |f| f.split(File::SEPARATOR).length }.each do |filepath|
  find_text_in_file( some_word, filepath )
end

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Alternatively, if you already have find_word_in_directory( some_word, dirpath ) then you can do:

Dir['**/*'].select{ |f| File.directory?(f) }.each do |dirpath|
  find_word_in_directory( some_word, dirpath )
end