Module: StringInFile

Defined in:
lib/string_in_file.rb,
lib/string_in_file/version.rb

Constant Summary collapse

VERSION = 
'1.0.2'.freeze

Class Method Summary collapse

Class Method Details

.add_beginning(str_to_add, path) ⇒ Object 



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# File 'lib/string_in_file.rb', line 55

def self.add_beginning(str_to_add, path)
  path_old = "#{path}.old"
  system("mv #{path} #{path_old}")

  # Create a new file and write to it
  file_to_write = File.open(path, 'w')
  file_to_write.puts str_to_add
  File.foreach(path_old) do |line|
    file_to_write.puts line
  end
  file_to_write.close

  # Delete the old file
  system("rm -f #{path_old}")
end

.add_end(str_to_add, path) ⇒ Object 



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# File 'lib/string_in_file.rb', line 71

def self.add_end(str_to_add, path)
  path_old = "#{path}.old"
  system("mv #{path} #{path_old}")

  # Create a new file and write to it
  file_to_write = File.open(path, 'w')
  File.foreach(path_old) do |line|
    file_to_write.puts line
  end
  file_to_write.puts str_to_add
  file_to_write.close

  # Delete the old file
  system("rm -f #{path_old}")
end

.present(str_to_find, path) ⇒ Object 



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# File 'lib/string_in_file.rb', line 42

def self.present(str_to_find, path)
  begin
    # loop through each line in the file
    File.foreach(path) do |line|
      # does the line contain our string?
      return true if line.include?(str_to_find)
    end
    return false
  rescue
    return false
  end
end

.read(path) ⇒ Object

Put contents of file into string Thanks to Keith R. Bennett for suggesting this solution on ruby.mn. Please note that newlines are removed. Thus, this is designed to work with 1-line strings.



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# File 'lib/string_in_file.rb', line 9

def self.read(path)
  str_output = File.readlines(path).join('')
  str_output = str_output.delete("\n")
end

.replace(string1, string2, path) ⇒ Object

Replace all instances of string1 in a file with string2 If string1 does not exist in the file, or if the file does not exist, no action is taken.



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# File 'lib/string_in_file.rb', line 22

def self.replace(string1, string2, path)
  path_old = "#{path}.old"
  system("mv #{path} #{path_old}")

  # Create a new file and write to it
  file_to_write = File.open(path, 'w')
  File.foreach(path_old) do |line|
    # does the line contain our string?
    if line.include?(string1)
      file_to_write.puts line.gsub!(string1, string2)
    else
      file_to_write.puts line
    end
  end
  file_to_write.close

  # Delete the old file
  system("rm -f #{path_old}")
end

.write(str_to_write, path) ⇒ Object

Writes the value of a string into a file



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# File 'lib/string_in_file.rb', line 15

def self.write(str_to_write, path)
  File.open(path, 'w') { |f| f.write(str_to_write) }
end