Module: F

Defined in:
lib/f.rb

Overview

Provides a wrapper around common calls that interact with the file system.

Class Method Summary collapse

Class Method Details

.concat_files(source_path, destination_path) ⇒ Object

Concatenates together the contents of all the files in the source_path into the destination_path.



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# File 'lib/f.rb', line 10

def concat_files(source_path, destination_path)
  File.open(destination_path, "a") do |output|
    Dir[source_path].each do |path|
      output.puts File.read(path)
    end
  end
end

.execute(command, params = {}) ⇒ Object

Execute a system command. If the parameter :return is true, execute the command with the backtick (‘) command and return the results. Otherwise, just execute the command and let the output go to the screen.



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# File 'lib/f.rb', line 56

def execute(command, params={})
  if params[:return]
    `#{command}`
  else
    Kernel.system command
  end
end

.get_line_from_file(path, line_number) ⇒ Object

Given a path and line_number, returns the line and two lines previous

Used for displaying validation errors.



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# File 'lib/f.rb', line 38

def get_line_from_file(path, line_number)
  line_number = line_number.to_i
  output = "\n"
  lines = File.readlines(path)

  3.times do |i|
    line = lines[line_number-(3-i)]
    output += line if line
  end

  output += "\n"
  output
end

.save_to_file(output, destination_path) ⇒ Object

Saves the output string to the destination_path given.

Returns true if the destination file was newly created, false if it already existed.



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# File 'lib/f.rb', line 23

def save_to_file(output, destination_path)
  if File.exists?(destination_path)      
    false
  else
    File.open(destination_path, "w") do |w|
      w.write(output)
    end
    true
  end
end