Class: Fig::OS

Inherits:
Object
  • Object
show all
Defined in:
lib/fig/os.rb

Constant Summary collapse

SUCCESS = 
0
NOT_MODIFIED = 
3
NOT_FOUND = 
4

Instance Method Summary collapse

Instance Method Details

#clear_directory(dir) ⇒ Object 



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# File 'lib/fig/os.rb', line 129

def clear_directory(dir)
  FileUtils.rm_rf(dir)
  FileUtils.mkdir_p(dir)
end

#copy(source, target) ⇒ Object 



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# File 'lib/fig/os.rb', line 138

def copy(source, target)
  FileUtils.mkdir_p(File.dirname(target))
  File.copy(source, target)
  target
end

#download(url, path) ⇒ Object 



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# File 'lib/fig/os.rb', line 34

def download(url, path)
  FileUtils.mkdir_p(File.dirname(path))
  uri = URI.parse(url)
  case uri.scheme
  when "ftp"
    ftp = Net::FTP.new(uri.host)
    ftp.
    if File.exist?(path) && ftp.mtime(uri.path) <= File.mtime(path)
      return false
    else 
      puts "downloading #{url}"
      ftp.getbinaryfile(uri.path, path, 256*1024)
      return true
    end
  when "http"
    http = Net::HTTP.new(uri.host)
    puts "downloading #{url}"
    File.open(path, "w") do |file|
      http.get(uri.path) do |block|
        file.write(block)
      end
    end
  when "ssh"
    # TODO need better way to do conditional download
#       timestamp = `ssh #{uri.user + '@' if uri.user}#{uri.host} "ruby -e 'puts File.mtime(\\"#{uri.path}\\").to_i'"`.to_i
    out = nil
    timestamp = File.exist?(path) ? File.mtime(path).to_i : 0 
    tempfile = Tempfile.new("tmp")
    IO.popen("ssh #{uri.user + '@' if uri.user}#{uri.host} \"fig-download #{timestamp} #{uri.path}\"") do |io|
      first = true 
      while bytes = io.read(4096)
        if first
          $stderr.puts "downloading #{url}"
          first = false
        end
        tempfile << bytes
      end
    end
    tempfile.close
    case $?.exitstatus
    when NOT_MODIFIED
      tempfile.delete
      return false
    when NOT_FOUND
      tempfile.delete
      raise "File not found: #{uri}"
    when SUCCESS
      FileUtils.mv(tempfile.path, path)
      return true
    else
      tempfile.delete
      $stderr.puts "Unable to download file: #{$?.exitstatus}"
      exit 1
    end
  else
    raise "Unknown protocol: #{url}"
  end
end

#download_archive(url, dir) ⇒ Object 



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# File 'lib/fig/os.rb', line 98

def download_archive(url, dir)
  FileUtils.mkdir_p(dir)
  basename = URI.parse(url).path.split('/').last
  path = File.join(dir, basename)
  download(url, path)
  case basename
  when /\.tar\.gz$/
    fail unless system "tar -C #{dir} -zxf #{path}"
  when /\.tgz$/
    fail unless system "tar -C #{dir} -zxf #{path}"
  when /\.tar\.bz2$/
    fail unless system "tar -C #{dir} -jxf #{path}"       
  when /\.zip$/
    fail unless system "unzip -q -d #{dir} #{path}"
  else
    raise "Unknown archive type: #{basename}"
  end
end

#download_resource(url, dir) ⇒ Object 



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# File 'lib/fig/os.rb', line 93

def download_resource(url, dir)
  FileUtils.mkdir_p(dir)
  download(url, File.join(dir, URI.parse(url).path.split('/').last))
end

#exec(dir, command) ⇒ Object 



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# File 'lib/fig/os.rb', line 134

def exec(dir,command)
  Dir.chdir(dir) { raise "Command failed" unless system command }
end

#exist?(path) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fig/os.rb', line 14

def exist?(path)
  File.exist?(path)
end

#list(dir) ⇒ Object 



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# File 'lib/fig/os.rb', line 10

def list(dir)
  Dir.entries(dir) - ['.','..']
end

#log_info(msg) ⇒ Object 



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# File 'lib/fig/os.rb', line 144

def log_info(msg)
  puts msg
end

#mtime(path) ⇒ Object 



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# File 'lib/fig/os.rb', line 18

def mtime(path)
  File.mtime(path)
end

#read(path) ⇒ Object 



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# File 'lib/fig/os.rb', line 22

def read(path)
  File.read(path)
end

#upload(local_file, remote_file, user) ⇒ Object 



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# File 'lib/fig/os.rb', line 117

def upload(local_file, remote_file, user)
  puts "uploading #{local_file} to #{remote_file}"
  uri = URI.parse(remote_file)
  if uri.scheme == "ssh"
    dir = uri.path[0, uri.path.rindex('/')]
    cmd = "mkdir -p #{dir} && cat > #{uri.path}"
    fail unless system "cat #{local_file} | ssh #{uri.user + '@' if uri.user}#{uri.host} '#{cmd}'"
  else
    fail unless system "curl -p -T #{local_file} --create-dirs --ftp-create-dirs #{remote_file}"
  end
end

#write(path, content) ⇒ Object 



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# File 'lib/fig/os.rb', line 26

def write(path, content)
  File.open(path, "w") { |f| f << content }
end