Class: Rupert::RPM::Lead

Inherits:
Object
  • Object
show all
Defined in:
lib/rupert/rpm/lead.rb

Constant Summary collapse

LEAD_LENGTH =

Lead has a fixed length

96.freeze
MAGIC =

The magic header that identifies an RPM beyond a shadow of a doubt, as every good RPM starts with hex ed ab ee db.

"\xed\xab\xee\xdb".force_encoding(Encoding::ASCII_8BIT).freeze
TYPE_BINARY =

RPM of type binary

0.freeze
TYPE_SOURCE =

RPM of type source

1.freeze
SIGNATURE_TYPE_HEADER =

Only valid and recognized signature type

5.freeze
@@arch_map = 
{
  1 => "i386/x86_64"
}.freeze
@@os_map = 
{
  1 => "Linux"
}.freeze

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(lead) ⇒ Lead

Initializes a lead section, parsing given IO

Parameters:

  • lead (IO) —

    An IO containing the lead information at the start



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# File 'lib/rupert/rpm/lead.rb', line 48

def initialize(lead)
  lead_data = lead.read(LEAD_LENGTH)
  parse(lead_data) if lead_data
end

Class Method Details

.chomp(io) ⇒ Rupert::RPM::Lead, IO

Chomps given IO, producing a Rupert::RPM::Lead object and returning the remaining part for subsequent processing.

Lead data is expected to begin at IO start, so returned scrap is basically the input IO without its first LEAD_LENGTH bytes.

Parameters:

  • io (IO) —

    IO object containing lead data at its start, possibly with additional bytes at the end

Returns:

  • (Rupert::RPM::Lead, IO) —

    the lead object corresponding to the data at the beginning of the IO, and the part of the input remaining after parsing.



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# File 'lib/rupert/rpm/lead.rb', line 41

def self.chomp(io)
  [ self.new(io), io ]
end

Instance Method Details

#arch ⇒ String

The architecture the package was built for. A list of supported architectures can be found in /usr/lib/rpm/rpmrc on RedHat based systems.

Returns:

  • (String) —

    a string representing the architecture name(s)



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# File 'lib/rupert/rpm/lead.rb', line 97

def arch
  @@arch_map[@archnum]
end

#binary_type? ⇒ Boolean

Returns true if lead reports RPM as of binary type.

Returns:

  • (Boolean) —

    true if lead reports RPM as of binary type



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# File 'lib/rupert/rpm/lead.rb', line 83

def binary_type?
  @type == TYPE_BINARY
end

#name ⇒ String

The name of the package

Returns:

  • (String) —

    package name in the form <name>-<version>-<rev>.<suffix>



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# File 'lib/rupert/rpm/lead.rb', line 104

def name
  @name
end

#os ⇒ String

OS for which the package was built

Returns:

  • (String) —

    OS canonical name as defined in /usr/lib/rpm/rpmrc



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# File 'lib/rupert/rpm/lead.rb', line 111

def os
  @@os_map[@osnum]
end

#reserved ⇒ String

String of reserved bits. It’s here for completeness of the lead’s implementation but it isn’t intended to be actually used

Returns:

  • (String) —

    the raw 16 bytes long reserved string at the end of the lead



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# File 'lib/rupert/rpm/lead.rb', line 125

def reserved
  @reserved
end

#rpm? ⇒ Boolean

Tells if the file is recognized as an RPM or not

Returns:

  • (Boolean) —

    true if magic number is found at lead’s start, false otherwise



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# File 'lib/rupert/rpm/lead.rb', line 78

def rpm?
  @magic == MAGIC
end

#rpm_version ⇒ String

RPM version used to format the package

Returns:

  • (String) —

    RPM version in <major>.<minor> format



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# File 'lib/rupert/rpm/lead.rb', line 70

def rpm_version
  "#{rpm_version_major}.#{rpm_version_minor}"
end

#rpm_version_major ⇒ Fixnum

Major number of the RPM version used to format the package

Returns:

  • (Fixnum) —

    RPM major version number



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# File 'lib/rupert/rpm/lead.rb', line 56

def rpm_version_major
  @rpm_major
end

#rpm_version_minor ⇒ Fixnum

Minor number of the RPM version used to format the package

Returns:

  • (Fixnum) —

    RPM minor version number



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# File 'lib/rupert/rpm/lead.rb', line 63

def rpm_version_minor
  @rpm_minor
end

#signed? ⇒ Boolean

Returns true if the RPM is recognized as being signed, false otherwise.

Returns:

  • (Boolean) —

    true if the RPM is recognized as being signed, false otherwise



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# File 'lib/rupert/rpm/lead.rb', line 116

def signed?
  @signature_type == SIGNATURE_TYPE_HEADER
end

#source_type? ⇒ Boolean

Returns true if lead reports RPM as of source type.

Returns:

  • (Boolean) —

    true if lead reports RPM as of source type



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# File 'lib/rupert/rpm/lead.rb', line 88

def source_type?
  @type == TYPE_SOURCE
end