summaryrefslogtreecommitdiff
path: root/lib/rubygems/resolver/installer_set.rb
blob: 045c893fdc4f3d05027dab57b312405b99ce9a28 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
##
# A set of gems for installation sourced from remote sources and local .gem
# files

class Gem::Resolver::InstallerSet < Gem::Resolver::Set

  ##
  # List of Gem::Specification objects that must always be installed.

  attr_reader :always_install # :nodoc:

  ##
  # Only install gems in the always_install list

  attr_accessor :ignore_dependencies # :nodoc:

  ##
  # Do not look in the installed set when finding specifications.  This is
  # used by the --install-dir option to `gem install`

  attr_accessor :ignore_installed # :nodoc:

  ##
  # Creates a new InstallerSet that will look for gems in +domain+.

  def initialize domain
    super()

    @domain = domain
    @remote = consider_remote?

    @f = Gem::SpecFetcher.fetcher

    @always_install      = []
    @ignore_dependencies = false
    @ignore_installed    = false
    @remote_set          = Gem::Resolver::BestSet.new
    @specs               = {}
  end

  ##
  # Should local gems should be considered?

  def consider_local? # :nodoc:
    @domain == :both or @domain == :local
  end

  ##
  # Should remote gems should be considered?

  def consider_remote? # :nodoc:
    @domain == :both or @domain == :remote
  end

  ##
  # Returns an array of IndexSpecification objects matching DependencyRequest
  # +req+.

  def find_all req
    res = []

    dep  = req.dependency

    return res if @ignore_dependencies and
              @always_install.none? { |spec| dep.matches_spec? spec }

    name = dep.name

    dep.matching_specs.each do |gemspec|
      next if @always_install.include? gemspec

      res << Gem::Resolver::InstalledSpecification.new(self, gemspec)
    end unless @ignore_installed

    if consider_local? then
      local_source = Gem::Source::Local.new

      if spec = local_source.find_gem(name, dep.requirement) then
        res << Gem::Resolver::IndexSpecification.new(
          self, spec.name, spec.version, local_source, spec.platform)
      end
    end

    res.concat @remote_set.find_all req if consider_remote?

    res
  end

  def inspect # :nodoc:
    always_install = @always_install.map { |s| s.full_name }

    '#<%s domain: %s specs: %p always install: %p>' % [
      self.class, @domain, @specs.keys, always_install,
    ]
  end

  ##
  # Called from IndexSpecification to get a true Specification
  # object.

  def load_spec name, ver, platform, source # :nodoc:
    key = "#{name}-#{ver}-#{platform}"

    @specs.fetch key do
      tuple = Gem::NameTuple.new name, ver, platform

      @specs[key] = source.fetch_spec tuple
    end
  end

  def pretty_print q # :nodoc:
    q.group 2, '[InstallerSet', ']' do
      q.breakable
      q.text "domain: #{@domain}"

      q.breakable
      q.text 'specs: '
      q.pp @specs.keys

      q.breakable
      q.text 'always install: '
      q.pp @always_install
    end
  end

  def remote= remote # :nodoc:
    case @domain
    when :local then
      @domain = :both if remote
    when :remote then
      @domain = nil unless remote
    when :both then
      @domain = :local unless remote
    end
  end

end