Class: ALib::Find2

Inherits:
Object show all
Defined in:
lib/alib-0.5.1/find2.rb

Overview

-*- Ruby -*- Copyright © 1998, 2001 Motoyuki Kasahara

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

Traverse a file tree, replacement of ‘find.rb’.

Constant Summary collapse

FIND1 =

Constatnts

1
FIND2 = 
2

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(mode = FIND1) ⇒ Find2

Initializer.



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# File 'lib/alib-0.5.1/find2.rb', line 27

def initialize(mode = FIND1)
#--{{{
  @mode   = mode
  @depth  = false
  @follow = false
  @xdev   = false

  @dirname_stats = Array.new
  @found_files = Array.new
  @target_device = 0

  @handle = lambda { |file, stat_result, block|
    case @mode
      when FIND1
        block ? block.call(file) : @found_files.push(file)
      when FIND2
        block ? block.call(file, stat_result) : @found_files.push([file, stat_result])
    end
  }
#--}}}
end

Instance Attribute Details

#depth ⇒ Object (readonly)

Methods for accessing instances.



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# File 'lib/alib-0.5.1/find2.rb', line 51

def depth
  @depth
end

#follow ⇒ Object (readonly)

Returns the value of attribute follow.



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# File 'lib/alib-0.5.1/find2.rb', line 52

def follow
  @follow
end

#xdev ⇒ Object (readonly)

Returns the value of attribute xdev.



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# File 'lib/alib-0.5.1/find2.rb', line 53

def xdev
  @xdev
end

Class Method Details

.find(*arguments, &block) ⇒ Object

Find the directory ‘dirname’. (class method)



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# File 'lib/alib-0.5.1/find2.rb', line 239

def self.find(*arguments, &block)
  new.find(*arguments, &block)
end

.find2(*arguments, &block) ⇒ Object

Find the directory ‘dirname’. (class method)



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# File 'lib/alib-0.5.1/find2.rb', line 245

def self.find2(*arguments, &block)
  new(FIND2).find(*arguments, &block)
end

.prune ⇒ Object

Prune the current visited directory.



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# File 'lib/alib-0.5.1/find2.rb', line 273

def self.prune
#--{{{
  throw :prune
#--}}}
end

Instance Method Details

#find(*arguments, &block) ⇒ Object

Find the directory ‘dirname’. (private)



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# File 'lib/alib-0.5.1/find2.rb', line 57

def find(*arguments, &block)
#--{{{
  #
  # Parse options if specified.
  #
  #if arguments[0].type == Hash
    #parse_options(arguments.shift)
  #end

# hack
  args = []
  opts = []
  arguments.each do |arg|
    case arg
      when Hash
        opts << arg
      else
        args << arg
    end
  end
  opts.each{|opt| parse_options opt}
  files = args.flatten.compact

  #
  # If a block is not given to the `find' method, found files are
  # recorded in this array.
  #
  @dirname_stats.clear
  @found_files.clear

  #
  # Loop for each file in `files'.
  #
  files.each do |file|
    catch(:prune) do
    @dirname_stats.clear

    #
    # Get `stat' or `lstat' of `file'.
    #
    begin
      if @follow
        begin
          stat_result = File.stat(file)
        rescue Errno::ENOENT, Errno::EACCES
          stat_result = File.lstat(file)
        end
      else
        stat_result = File.lstat(file)
      end
    rescue Errno::ENOENT, Errno::EACCES
      next
    end

    #
    # Push `file' to the found stack, or yield with it,
    # if the depth flag is enabled.
    #
    @handle[ file, stat_result, block ] if !@depth

    #
    # If `file' is a directory, find files recursively.
    #
    if stat_result.directory?
      @xdev_device = stat_result.dev if @xdev
      @dirname_stats.push(stat_result)
      find_directory(file, block)
    end

    #
    # Push `file' to the found stack, or yield with it.
    # if the depth flag is disabled.
    #
    @handle[ file, stat_result, block ] if @depth

    end
  end

  if block == nil
    return @found_files
  else
    return nil
  end
#--}}}
end