Class: LocalSystem

Inherits:
System show all
Defined in:
lib/local_system.rb

Overview

Copyright © 2013-2014 SUSE LLC

This program is free software; you can redistribute it and/or modify it under the terms of version 3 of the GNU General Public License as published by the Free Software Foundation.

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.

You should have received a copy of the GNU General Public License along with this program; if not, contact SUSE LLC.

To contact SUSE about this file by physical or electronic mail, you may find current contact information at www.suse.com

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from System

#check_requirement, #create_archive, for, #run_script

Class Method Details

.os_object ⇒ Object 



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# File 'lib/local_system.rb', line 20

def os_object
  description = SystemDescription.new("localhost")
  inspector = OsInspector.new
  inspector.inspect(System.for("localhost"), description)
  description.os_object
end

.validate_build_compatibility(system_description) ⇒ Object 



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# File 'lib/local_system.rb', line 57

def validate_build_compatibility(system_description)
  if !os_object.can_build?(system_description.os_object)
    message = "Building '#{system_description.os_object.name}' images is " \
      "not supported on this distribution.\n" \
      "Check the 'BUILD SUPPORT MATRIX' section in our man page for " \
      "further information which build targets are supported."

    raise(Machinery::Errors::BuildFailed.new(message))
  end
end

.validate_existence_of_package(package) ⇒ Object 



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# File 'lib/local_system.rb', line 27

def validate_existence_of_package(package)
  begin
    Cheetah.run("rpm", "-q", package)
  rescue
    needed_module = os_object.module_required_by_package(package)
    if needed_module
      raise(Machinery::Errors::MissingRequirement.new("You need the package '#{package}' from module '#{needed_module}'. You can install it as follows:\n" \
        "If you haven't selected the module '#{needed_module}' before, run `yast2 scc` and choose 'Select Extensions' and activate '#{needed_module}'.\nRun `zypper install #{package}` to install the package."))
    else
      raise(Machinery::Errors::MissingRequirement.new("You need the package '#{package}'. You can install it by running `zypper install #{package}`"))
    end
  end
end

.validate_machinery_compatibility ⇒ Object 



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# File 'lib/local_system.rb', line 41

def validate_machinery_compatibility
  begin
    os = os_object
  rescue Machinery::Errors::SystemDescriptionError
    os = nil
  end

  if !os || !os.can_run_machinery?
    message = "Running Machinery is not supported on this system.\n" \
      "Check the 'Installation' section in the README.md for more information " \
      "about the requirements."

    raise(Machinery::Errors::IncompatibleHost.new(message))
  end
end

Instance Method Details

#read_file(file) ⇒ Object

Reads a file from the System. Returns nil if it does not exist.



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# File 'lib/local_system.rb', line 101

def read_file(file)
  File.read(file)
rescue Errno::ENOENT
  # File not found, return nil
  return
end

#requires_root? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/local_system.rb', line 69

def requires_root?
  true
end

#retrieve_files(filelist, destination) ⇒ Object

Retrieves files specified in filelist from the local system and raises an Machinery::Errors::RsyncFailed exception when it’s not successful. Destination is the directory where to put the files.



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# File 'lib/local_system.rb', line 87

def retrieve_files(filelist, destination)
  begin
    LoggedCheetah.run("rsync",  "--chmod=go-rwx", "--files-from=-", "/", destination, :stdout => :capture, :stdin => filelist.join("\n") )
  rescue Cheetah::ExecutionFailed => e
    raise Machinery::Errors::RsyncFailed.new(
    "Could not rsync files from localhost. \n" \
    "Error: #{e}\n" \
    "If you lack read permissions on some files you may want to retry as user root or specify\n" \
    "the fully qualified host name instead of localhost in order to connect as root via ssh."
  )
  end
end

#run_command(*args) ⇒ Object 



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# File 'lib/local_system.rb', line 73

def run_command(*args)
  if args.last.is_a?(Hash) && args.last[:disable_logging]
    cheetah_class = Cheetah
  else
    cheetah_class = LoggedCheetah
  end
  with_c_locale do
    cheetah_class.run(*args)
  end
end