class FileRotator

Rotate any files. Call it before writing new file ex. nginx.conf rotate: 1) mv nginx.conf.last nginx.conf.last + 1 2) mv nginx.conf.prelast nginx.conf.last … 3) mv nginx.conf nginx.conf.1 and then you can write new file `nginx.conf` etc…

Attributes

count_files[RW]

original[RW]

stack[RW]

Public Class Methods

new(original, count_files = 10) click to toggle source

# File lib/file_rotator.rb, line 14
def initialize(original, count_files = 10)
  self.original = original
  self.stack = []
  self.count_files = count_files
end

Public Instance Methods

move(file) click to toggle source

# File lib/file_rotator.rb, line 34
def move(file)
  next_file = next_name(file)
  if number(next_file) <= count_files
    FileUtils.mv(file, next_file)
  else
    FileUtils.rm(file)
  end
end

next_name(file) click to toggle source

# File lib/file_rotator.rb, line 20
def next_name(file)
  name_arr = file.split('.')
  next_num = name_arr.last.to_i + 1
  if next_num == 1
    name_arr.join('.') + ".#{next_num}"
  else
    name_arr[0..-2].join('.') + ".#{next_num}"
  end
end

number(file) click to toggle source

# File lib/file_rotator.rb, line 30
def number(file)
  file.split('.').last.to_i
end

rotate(file) click to toggle source

# File lib/file_rotator.rb, line 43
def rotate(file)
  next_file = next_name(file)
  if File.exist?(next_file)
    stack << file
    return rotate(next_file)
  end
  move(file)
  return if stack.empty?
  rotate(stack.pop)
end

run() click to toggle source

# File lib/file_rotator.rb, line 54
def run
  rotate(original) if File.exist?(original)
end