summaryrefslogtreecommitdiff
path: root/lib/bundler/graph.rb
blob: 5644e410797c09321c18e2a15125fa50f8317630 (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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
# frozen_string_literal: true

require "set"
module Bundler
  class Graph
    GRAPH_NAME = :Gemfile

    def initialize(env, output_file, show_version = false, show_requirements = false, output_format = "png", without = [])
      @env               = env
      @output_file       = output_file
      @show_version      = show_version
      @show_requirements = show_requirements
      @output_format     = output_format
      @without_groups    = without.map(&:to_sym)

      @groups            = []
      @relations         = Hash.new {|h, k| h[k] = Set.new }
      @node_options      = {}
      @edge_options      = {}

      _populate_relations
    end

    attr_reader :groups, :relations, :node_options, :edge_options, :output_file, :output_format

    def viz
      GraphVizClient.new(self).run
    end

  private

    def _populate_relations
      parent_dependencies = _groups.values.to_set.flatten
      loop do
        break if parent_dependencies.empty?

        tmp = Set.new
        parent_dependencies.each do |dependency|
          child_dependencies = spec_for_dependency(dependency).runtime_dependencies.to_set
          @relations[dependency.name] += child_dependencies.map(&:name).to_set
          tmp += child_dependencies

          @node_options[dependency.name] = _make_label(dependency, :node)
          child_dependencies.each do |c_dependency|
            @edge_options["#{dependency.name}_#{c_dependency.name}"] = _make_label(c_dependency, :edge)
          end
        end
        parent_dependencies = tmp
      end
    end

    def _groups
      relations = Hash.new {|h, k| h[k] = Set.new }
      @env.current_dependencies.each do |dependency|
        dependency.groups.each do |group|
          next if @without_groups.include?(group)

          relations[group.to_s].add(dependency)
          @relations[group.to_s].add(dependency.name)

          @node_options[group.to_s] ||= _make_label(group, :node)
          @edge_options["#{group}_#{dependency.name}"] = _make_label(dependency, :edge)
        end
      end
      @groups = relations.keys
      relations
    end

    def _make_label(symbol_or_string_or_dependency, element_type)
      case element_type.to_sym
      when :node
        if symbol_or_string_or_dependency.is_a?(Gem::Dependency)
          label = symbol_or_string_or_dependency.name.dup
          label << "\n#{spec_for_dependency(symbol_or_string_or_dependency).version}" if @show_version
        else
          label = symbol_or_string_or_dependency.to_s
        end
      when :edge
        label = nil
        if symbol_or_string_or_dependency.respond_to?(:requirements_list) && @show_requirements
          tmp = symbol_or_string_or_dependency.requirements_list.join(", ")
          label = tmp if tmp != ">= 0"
        end
      else
        raise ArgumentError, "2nd argument is invalid"
      end
      label.nil? ? {} : { :label => label }
    end

    def spec_for_dependency(dependency)
      @env.requested_specs.find {|s| s.name == dependency.name }
    end

    class GraphVizClient
      def initialize(graph_instance)
        @graph_name    = graph_instance.class::GRAPH_NAME
        @groups        = graph_instance.groups
        @relations     = graph_instance.relations
        @node_options  = graph_instance.node_options
        @edge_options  = graph_instance.edge_options
        @output_file   = graph_instance.output_file
        @output_format = graph_instance.output_format
      end

      def g
        @g ||= ::GraphViz.digraph(@graph_name, :concentrate => true, :normalize => true, :nodesep => 0.55) do |g|
          g.edge[:weight]   = 2
          g.edge[:fontname] = g.node[:fontname] = "Arial, Helvetica, SansSerif"
          g.edge[:fontsize] = 12
        end
      end

      def run
        @groups.each do |group|
          g.add_nodes(
            group, {
              :style     => "filled",
              :fillcolor => "#B9B9D5",
              :shape     => "box3d",
              :fontsize  => 16,
            }.merge(@node_options[group])
          )
        end

        @relations.each do |parent, children|
          children.each do |child|
            if @groups.include?(parent)
              g.add_nodes(child, { :style => "filled", :fillcolor => "#B9B9D5" }.merge(@node_options[child]))
              g.add_edges(parent, child, { :constraint => false }.merge(@edge_options["#{parent}_#{child}"]))
            else
              g.add_nodes(child, @node_options[child])
              g.add_edges(parent, child, @edge_options["#{parent}_#{child}"])
            end
          end
        end

        if @output_format.to_s == "debug"
          $stdout.puts g.output :none => String
          Bundler.ui.info "debugging bundle viz..."
        else
          begin
            g.output @output_format.to_sym => "#{@output_file}.#{@output_format}"
            Bundler.ui.info "#{@output_file}.#{@output_format}"
          rescue ArgumentError => e
            warn "Unsupported output format. See Ruby-Graphviz/lib/graphviz/constants.rb"
            raise e
          end
        end
      end
    end
  end
end