Module: TmpFile

Defined in:
lib/scout/tmpfile.rb,
lib/scout/path/tmpfile.rb

Constant Summary collapse

MAX_FILE_LENGTH = 
150
SLASH_REPLACE = 
'·'

Class Method Summary collapse

Class Method Details

.in_dir(*args) ⇒ Object 



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# File 'lib/scout/tmpfile.rb', line 89

def self.in_dir(*args)
  with_dir(*args) do |dir|
    Misc.in_dir dir do
      yield dir
    end
  end
end

.random_name(prefix = 'tmp-', max = 1_000_000_000) ⇒ Object

Creates a random file name, with the given suffix and a random number up to max



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# File 'lib/scout/tmpfile.rb', line 26

def self.random_name(prefix = 'tmp-', max = 1_000_000_000)
  n = rand(max)
  prefix + n.to_s
end

.tmp_file(prefix = 'tmp-', max = 1_000_000_000, dir = nil) ⇒ Object

Creates a random filename in the temporary directory



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# File 'lib/scout/tmpfile.rb', line 32

def self.tmp_file(prefix = 'tmp-', max = 1_000_000_000, dir = nil)
  dir ||= TmpFile.tmpdir
  dir = dir.find if Path === dir
  File.expand_path(File.join(dir, random_name(prefix, max)))
end

.tmp_for_file(file, tmp_options = {}, other_options = {}) ⇒ Object 



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# File 'lib/scout/tmpfile.rb', line 98

def self.tmp_for_file(file, tmp_options = {}, other_options = {})
  tmp_for_file, prefix, key, persistence_dir = IndiferentHash.process_options tmp_options, :file, :prefix, :key, :dir
  return tmp_for_file unless tmp_for_file.nil?

  if prefix.nil?
    perfile = file.to_s.sub(/\.b?gz$/,'')
  else
    perfile = prefix.to_s + ":" + file.to_s.sub(/\.b?gz$/,'')
  end

  perfile += "[#{ key }]" if key

  if other_options.include? :filters
    other_options[:filters].each do |match,value|
      perfile = perfile + "&F[#{match}=#{Misc.digest(value)}]"
    end
  end

  persistence_dir = TmpFile.tmpdir if persistence_dir.nil?
  Path.setup(persistence_dir) unless Path === persistence_dir

  filename = perfile.gsub(/\s/,'_').gsub('/', SLASH_REPLACE)
  clean_options = other_options.dup
  clean_options.delete :unnamed
  clean_options.delete "unnamed"

  filename = filename[0..MAX_FILE_LENGTH] << Misc.digest(filename[MAX_FILE_LENGTH+1..-1]) if filename.length > MAX_FILE_LENGTH + 10

  filename  += ":" << Misc.digest(clean_options) unless clean_options.empty?

  persistence_dir[filename]
end

.tmpdir ⇒ Object 



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# File 'lib/scout/tmpfile.rb', line 20

def self.tmpdir
  @tmpdir ||= self.user_tmp('tmpfiles')
end

.tmpdir=(tmpdir) ⇒ Object 



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# File 'lib/scout/tmpfile.rb', line 16

def self.tmpdir=(tmpdir)
  @tmpdir = tmpdir
end

.user_tmp(subdir = nil) ⇒ Object 



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# File 'lib/scout/tmpfile.rb', line 8

def self.user_tmp(subdir = nil)
  if subdir
    File.join(ENV["HOME"],"/tmp/scout", subdir)
  else
    File.join(ENV["HOME"],"/tmp/scout")
  end
end

.with_dir(erase = true, options = {}) ⇒ Object 



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# File 'lib/scout/tmpfile.rb', line 76

def self.with_dir(erase = true, options = {})
  prefix = options[:prefix] || 'tmpdir-'
  tmpdir = tmp_file prefix

  FileUtils.mkdir_p tmpdir

  result = yield(tmpdir)

  FileUtils.rm_rf tmpdir if File.exist?(tmpdir) && erase

  result
end

.with_file(content = nil, erase = true, options = {}) ⇒ Object 



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# File 'lib/scout/tmpfile.rb', line 38

def self.with_file(content = nil, erase = true, options = {})
  if content.is_a?(Hash)
    options = content
    content = nil
    erase = true
  end
  if erase.is_a?(Hash)
    options = erase
    erase = true
  end

  prefix = options[:prefix] || 'tmp-'
  tmpdir = options[:tmpdir] || TmpFile.tmpdir
  max = options[:max] || 1_000_000_000
  tmpfile = tmp_file prefix, max, tmpdir
  tmpfile += ".#{options[:extension]}" if options[:extension]

  FileUtils.mkdir_p tmpdir
  if IO === content
    File.open(tmpfile, 'wb') do |f|
      begin
        while c = content.readpartial(1024)
          f << c
        end
      rescue EOFError
      end
    end
  elsif !content.nil?
    File.open(tmpfile, 'w') { |f| f.write content }
  end

  result = yield(tmpfile)

  FileUtils.rm_rf tmpfile if File.exist?(tmpfile) && erase

  result
end

.with_path(*args, &block) ⇒ Object 



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# File 'lib/scout/path/tmpfile.rb', line 2

def self.with_path(*args, &block)
  TmpFile.with_file(*args) do |file|
    Path.setup(file)
    yield file
  end
end