Class: LocalSystem

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

Overview

Copyright © 2013-2015 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

Constant Summary collapse

@@os = 
nil

Instance Attribute Summary

Attributes inherited from System

#locale

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from System

#arch, #check_create_archive_dependencies, #check_requirement, #check_retrieve_files_dependencies, #create_archive, for, #has_command?, #rpm_database, #run_script, #run_script_with_progress

Class Method Details

.matches_architecture?(arch) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/local_system.rb', line 80

def matches_architecture?(arch)
  os.architecture == arch
end

.os ⇒ Object 



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# File 'lib/local_system.rb', line 22

def os
  if !@@os
    description = SystemDescription.new("localhost", SystemDescriptionMemoryStore.new)
    inspector = OsInspector.new(System.for("localhost"), description)
    inspector.inspect(nil)
    @@os = description.os
  end
  @@os
end

.validate_architecture(arch) ⇒ Object 



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# File 'lib/local_system.rb', line 84

def validate_architecture(arch)
  if !matches_architecture?(arch)
    raise(Machinery::Errors::UnsupportedArchitecture.new(
      "This operation is not supported on architecture '#{os.architecture}'."
    ))
  end
end

.validate_existence_of_command(command, package) ⇒ Object 



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# File 'lib/local_system.rb', line 70

def validate_existence_of_command(command, package)
  Cheetah.run("which", command)
rescue Cheetah::ExecutionFailed
  output = <<-EOF
You need the command '#{command}' from package '#{package}'.
You can install it by running `zypper install #{package}`.
  EOF
  raise(Machinery::Errors::MissingRequirement.new(output))
end

.validate_existence_of_package(package) ⇒ Object 



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# File 'lib/local_system.rb', line 32

def validate_existence_of_package(package)
  validate_existence_of_packages([package])
end

.validate_existence_of_packages(packages) ⇒ Object 



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# File 'lib/local_system.rb', line 36

def validate_existence_of_packages(packages)
  missing_packages = []
  needed_modules = []

  packages.each do |package|
    begin
      Cheetah.run("rpm", "-q", package)
    rescue Cheetah::ExecutionFailed
      missing_packages << package
      needed_module = os.module_required_by_package(package)
      if needed_module
        needed_modules << package
        if needed_module
          output = <<-EOF
You need the package '#{package}' from module '#{needed_module}'. You can install it as follows:
If you haven't selected the module '#{needed_module}' before, run `yast2 scc` and choose 'Select Extensions' and activate '#{needed_module}'.
Run `zypper install #{package}` to install the package.
          EOF
          raise(Machinery::Errors::MissingRequirement.new(output))
        end
      end
    end
  end

  if !missing_packages.empty?
    count = missing_packages.count
    error_string = <<-EOF
You need the #{Machinery::pluralize(count, "package")} '#{missing_packages.join("\',\'")}'.
You can install it by running `zypper install #{missing_packages.join(" ")}`.
    EOF
    raise(Machinery::Errors::MissingRequirement.new(error_string))
  end
end

Instance Method Details

#inject_file(source, destination) ⇒ Object

Copies a file to the local system



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# File 'lib/local_system.rb', line 149

def inject_file(source, destination)
  FileUtils.copy(source, destination)
rescue => e
  raise Machinery::Errors::InjectFileFailed.new(
    "Could not inject file '#{source}' to local system.\n" \
    "Error: #{e}"
  )
end

#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 141

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

#remove_file(file) ⇒ Object

Removes a file from the System



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# File 'lib/local_system.rb', line 159

def remove_file(file)
  File.delete(file) if File.exist?(file)
rescue => e
  raise Machinery::Errors::RemoveFileFailed.new(
    "Could not remove file '#{file}' on local system'.\n" \
    "Error: #{e}"
  )
end

#requires_root? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/local_system.rb', line 97

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 119

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 101

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

  with_env(
    "LANGUAGE" => "",
    "LC_ALL" => locale
  ) do
    cheetah_class.run(*args)
  end
end

#type ⇒ Object 



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# File 'lib/local_system.rb', line 93

def type
  "local"
end