Class: LibGems::Requirement
- Inherits:
-
Object
- Object
- LibGems::Requirement
- Includes:
- Comparable
- Defined in:
- lib/libgems/requirement.rb
Overview
A Requirement is a set of one or more version restrictions. It supports a few (=, !=, >, <, >=, <=, ~>
) different restriction operators.
Constant Summary collapse
- OPS =
:nodoc:
{ #:nodoc: "=" => lambda { |v, r| v == r }, "!=" => lambda { |v, r| v != r }, ">" => lambda { |v, r| v > r }, "<" => lambda { |v, r| v < r }, ">=" => lambda { |v, r| v >= r }, "<=" => lambda { |v, r| v <= r }, "~>" => lambda { |v, r| v >= r && v.release < r.bump } }
- PATTERN =
/\A\s*(#{quoted})?\s*(#{LibGems::Version::VERSION_PATTERN})\s*\z/
Instance Attribute Summary collapse
-
#requirements ⇒ Object
readonly
An array of requirement pairs.
Class Method Summary collapse
-
.create(input) ⇒ Object
Factory method to create a LibGems::Requirement object.
-
.default ⇒ Object
A default “version requirement” can surely only be ‘>= 0’.
-
.parse(obj) ⇒ Object
Parse
obj
, returning an[op, version]
pair.
Instance Method Summary collapse
-
#<=>(other) ⇒ Object
:nodoc:.
-
#as_list ⇒ Object
:nodoc:.
-
#hash ⇒ Object
:nodoc:.
-
#initialize(*requirements) ⇒ Requirement
constructor
Constructs a requirement from
requirements
. -
#marshal_dump ⇒ Object
:nodoc:.
-
#marshal_load(array) ⇒ Object
:nodoc:.
- #none? ⇒ Boolean
- #prerelease? ⇒ Boolean
-
#pretty_print(q) ⇒ Object
:nodoc:.
-
#satisfied_by?(version) ⇒ Boolean
True if
version
satisfies this Requirement. -
#to_s ⇒ Object
:nodoc:.
- #to_yaml_type ⇒ Object
Constructor Details
#initialize(*requirements) ⇒ Requirement
Constructs a requirement from requirements
. Requirements can be Strings, LibGems::Versions, or Arrays of those. nil
and duplicate requirements are ignored. An empty set of requirements
is the same as ">= 0"
.
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# File 'lib/libgems/requirement.rb', line 109 def initialize *requirements requirements = requirements.flatten requirements.compact! requirements.uniq! requirements << ">= 0" if requirements.empty? @none = (requirements == ">= 0") @requirements = requirements.map! { |r| self.class.parse r } end |
Instance Attribute Details
#requirements ⇒ Object (readonly)
An array of requirement pairs. The first element of the pair is the op, and the second is the LibGems::Version.
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# File 'lib/libgems/requirement.rb', line 101 def requirements @requirements end |
Class Method Details
.create(input) ⇒ Object
Factory method to create a LibGems::Requirement object. Input may be a Version, a String, or nil. Intended to simplify client code.
If the input is “weird”, the default version requirement is returned.
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# File 'lib/libgems/requirement.rb', line 49 def self.create input case input when LibGems::Requirement then input when LibGems::Version, Array then new input else if input.respond_to? :to_str then new [input.to_str] else default end end end |
.default ⇒ Object
A default “version requirement” can surely only be ‘>= 0’. – This comment once said:
“A default ”version requirement“ can surely only be ‘> 0’.”
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# File 'lib/libgems/requirement.rb', line 71 def self.default new '>= 0' end |
.parse(obj) ⇒ Object
Parse obj
, returning an [op, version]
pair. obj
can be a String or a LibGems::Version.
If obj
is a String, it can be either a full requirement specification, like ">= 1.2"
, or a simple version number, like "1.2"
.
parse("> 1.0") # => [">", "1.0"]
parse("1.0") # => ["=", "1.0"]
parse(LibGems::Version.new("1.0")) # => ["=, "1.0"]
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# File 'lib/libgems/requirement.rb', line 87 def self.parse obj return ["=", obj] if LibGems::Version === obj unless PATTERN =~ obj.to_s raise ArgumentError, "Illformed requirement [#{obj.inspect}]" end [$1 || "=", LibGems::Version.new($2)] end |
Instance Method Details
#<=>(other) ⇒ Object
:nodoc:
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# File 'lib/libgems/requirement.rb', line 171 def <=> other # :nodoc: to_s <=> other.to_s end |
#as_list ⇒ Object
:nodoc:
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# File 'lib/libgems/requirement.rb', line 123 def as_list # :nodoc: requirements.map { |op, version| "#{op} #{version}" } end |
#hash ⇒ Object
:nodoc:
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# File 'lib/libgems/requirement.rb', line 127 def hash # :nodoc: requirements.hash end |
#marshal_dump ⇒ Object
:nodoc:
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# File 'lib/libgems/requirement.rb', line 131 def marshal_dump # :nodoc: [@requirements] end |
#marshal_load(array) ⇒ Object
:nodoc:
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# File 'lib/libgems/requirement.rb', line 135 def marshal_load array # :nodoc: @requirements = array[0] # Fixup the Syck DefaultKey bug @requirements.each do |r| if r[0].kind_of? YAML::Syck::DefaultKey r[0] = "=" end end end |
#none? ⇒ Boolean
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# File 'lib/libgems/requirement.rb', line 119 def none? @none ||= (to_s == ">= 0") end |
#prerelease? ⇒ Boolean
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# File 'lib/libgems/requirement.rb', line 146 def prerelease? requirements.any? { |r| r.last.prerelease? } end |
#pretty_print(q) ⇒ Object
:nodoc:
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# File 'lib/libgems/requirement.rb', line 150 def pretty_print q # :nodoc: q.group 1, 'LibGems::Requirement.new(', ')' do q.pp as_list end end |
#satisfied_by?(version) ⇒ Boolean
True if version
satisfies this Requirement.
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# File 'lib/libgems/requirement.rb', line 159 def satisfied_by? version requirements.all? { |op, rv| OPS[op].call version, rv } end |
#to_s ⇒ Object
:nodoc:
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# File 'lib/libgems/requirement.rb', line 163 def to_s # :nodoc: as_list.join ", " end |
#to_yaml_type ⇒ Object
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# File 'lib/libgems/requirement.rb', line 167 def to_yaml_type "!ruby/object:Gem::Requirement" end |