Module: CommonMob::FileHelper

Defined in:
lib/common_mob/file.rb

Instance Method Summary collapse

Instance Method Details

#backup_file(f) ⇒ Object 



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# File 'lib/common_mob/file.rb', line 6

def backup_file(f)
  return if FalseClass === args.backup || args.backup == 0

  backups = args.backups || 5
  backups = backups.to_i

  root = f.dirname
  backedup = f.basename.to_s + ".AM-#{Time.now.to_i}"
  backup = root+backedup

  log "backing #{f} up to #{backup}"

  FileUtils.cp f, (backup)

  if backups > 0
    existing_backups = Pathname.glob( root + "#{f.basename}.AM-*" ).sort_by {|f| f.ctime}.reverse
    if existing_backups.size > backups
      log "deleting #{existing_backups.size - backups} old backups (keeping #{backups})"
      existing_backups[backups..-1].each {|to_del| to_del.unlink}
    end
  end

  backup
rescue Errno::ENOENT
  # *ulp*
end

#set_file_attrs(file, owner, group, mode) ⇒ Object 



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# File 'lib/common_mob/file.rb', line 33

def set_file_attrs(file,owner,group,mode)
  file = Pathname(file)

  unless owner.blank? && group.blank?
    owner ||= file.stat.uid
    group ||= file.stat.gid

    owner = Etc.getpwnam(owner.to_s).uid unless Integer === owner
    group = Etc.getgrnam(group.to_s).gid unless Integer === group

    log "setting #{file} to owner=#{owner} group=#{group}"

    file.chown(owner,group)
  end

  unless mode.blank?
    log "setting #{file} to mode=0%o" % mode
    file.chmod(mode) 
  end
end