Class: DR::Graph
Instance Attribute Summary collapse
-
#nodes ⇒ Object
Returns the value of attribute nodes.
Class Method Summary collapse
-
.build(nodes, recursive: true) ⇒ Object
Graph.build(nodes,&b) allows to build a graph using &b if recursive is true each time we get new nodes we add them to the graph otherwise just run once if recursive=0 we even restrict the graph to the current nodes Note: to construct a graph from one node to a list it suffice to call nodes.map(&b).reduce(:|).
Instance Method Summary collapse
- #+(graph) ⇒ Object
- #-(other) ⇒ Object
- #[](node) ⇒ Object
-
#add_node(node, children: [], parents: [], attributes: {}, infos: nil, recursive: true) ⇒ Object
add a node (and its edges, recursively by default) TODO in case of a loop this is currently non terminating when recursive we would need to keep track of handled nodes.
- #all ⇒ Object
-
#ancestors(*nodes, ourselves: true) ⇒ Object
return all parents.
- #bottom ⇒ Object
-
#build(*nodes, attributes: {}, infos: nil, recursive: true) ⇒ Object
build from a list of nodes or hash.
- #clone ⇒ Object
-
#connected(*nodes, down: true, up: true, ourselves: true) ⇒ Object
return the connected set containing nodes (following the direction given).
-
#descendants(*nodes, ourselves: true) ⇒ Object
return all childern.
- #dump(mode: :graph, nodes_list: :roots, show_attr: true, out: [], **_opts) ⇒ Object
- #each(&b) ⇒ Object
-
#initialize(*nodes, attributes: {}, infos: nil) ⇒ Graph
constructor
note: passing a graph won't work.
- #inspect ⇒ Object
- #names ⇒ Object
-
#new_node(node, **attributes) ⇒ Object
construct a node (without edges).
- #roots ⇒ Object
-
#subgraph(*nodes, complement: false) ⇒ Object
return the subgraph containing all the nodes passed as parameters, and the complementary graph.
- #to_a ⇒ Object
-
#to_children ⇒ Object
alias to_children to_h.
- #to_h ⇒ Object
- #to_hash(methods: [:children,:parents,:attributes], compact: true, recursive: true) ⇒ Object
- #to_nodes(*nodes) ⇒ Object
-
#unneeded(*nodes, needed: nil) ⇒ Object
from a list of nodes, return all nodes that are not descendants of other nodes in the graph needed: the nodes whose descendants we keep, by default the complement of nodes.
-
#unneeded_descendants(*nodes, needed: []) ⇒ Object
like unneeded(descendants(*nodes)) return all dependencies that are not needed by any more other nodes (except the ones we are removing) If some dependencies should be kept (think manual install), add them to the needed parameter.
-
#|(graph) ⇒ Object
allow a hash too.
Constructor Details
#initialize(*nodes, attributes: {}, infos: nil) ⇒ Graph
note: passing a graph won't work
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# File 'lib/dr/base/graph.rb', line 111 def initialize(*nodes, attributes: {}, infos: nil) @nodes=[] # a node can be a Hash or a Node # so nodes really is a list of subgraphs build(*nodes, attributes: attributes, infos: infos) end |
Instance Attribute Details
#nodes ⇒ Object
Returns the value of attribute nodes.
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# File 'lib/dr/base/graph.rb', line 108 def nodes @nodes end |
Class Method Details
.build(nodes, recursive: true) ⇒ Object
Graph.build(nodes,&b) allows to build a graph using &b if recursive is true each time we get new nodes we add them to the graph otherwise just run once if recursive=0 we even restrict the graph to the current nodes Note: to construct a graph from one node to a list it suffice to call nodes.map(&b).reduce(:|)
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# File 'lib/dr/base/graph.rb', line 370 def self.build(nodes, recursive: true) g=yield(*nodes) g=Graph.new(g) unless g.is_a?(Graph) new_nodes=g.nodes.map(&:name)-nodes if recursive==0 and !new_nodes.empty? g-(new_nodes) elsif recursive while !new_nodes.empty? g2=yield(*new_nodes) g2=Graph.new(g2) unless g2.is_a?(Graph) g|g2 nodes=nodes.concat(new_nodes) new_nodesg.nodes.map(&:name)-nodes end g else g end end |
Instance Method Details
#+(graph) ⇒ Object
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# File 'lib/dr/base/graph.rb', line 232 def +(graph) clone.|(graph) end |
#-(other) ⇒ Object
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# File 'lib/dr/base/graph.rb', line 351 def -(other) if other.is_a? Graph #in this case we want to remove the edges other.each do |n| self[n].rm_child(*n.children) end else #we remove a list of nodes nodes=@nodes-to_nodes(*other) subgraph(*nodes) end end |
#[](node) ⇒ Object
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# File 'lib/dr/base/graph.rb', line 137 def [](node) if node.is_a?(Node) and node.graph == self return node elsif node.is_a?(Node) name=node.name else name=node end @nodes.find {|n| n.name == name} end |
#add_node(node, children: [], parents: [], attributes: {}, infos: nil, recursive: true) ⇒ Object
add a node (and its edges, recursively by default) TODO in case of a loop this is currently non terminating when recursive we would need to keep track of handled nodes
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# File 'lib/dr/base/graph.rb', line 180 def add_node(node, children: [], parents: [], attributes: {}, infos: nil, recursive: true) if infos.respond_to?(:call) info=infos.call(node)||{} children.concat([*info[:children]]) parents.concat([*info[:parents]]) attributes.merge!(info[:attributes]||{}) end if node.is_a?(Node) and node.graph != self children.concat(node.children) parents.concat(node.parents) end graph_node=new_node(node,**attributes) if recursive graph_node.add_child(*children.map { |child| add_node(child) }) graph_node.add_parent(*parents.map { |parent| add_node(parent) }) else #just add the children graph_node.add_child(*children.map { |child| new_node(child) }) end graph_node end |
#all ⇒ Object
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# File 'lib/dr/base/graph.rb', line 217 def all @nodes.sort end |
#ancestors(*nodes, ourselves: true) ⇒ Object
return all parents
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# File 'lib/dr/base/graph.rb', line 278 def ancestors(*nodes, ourselves: true) nodes=to_nodes(*nodes) connected(*nodes, up:true, down:false, ourselves: ourselves) end |
#bottom ⇒ Object
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# File 'lib/dr/base/graph.rb', line 223 def bottom @nodes.select{ |n| n.children.length == 0}.sort end |
#build(*nodes, attributes: {}, infos: nil, recursive: true) ⇒ Object
build from a list of nodes or hash
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# File 'lib/dr/base/graph.rb', line 203 def build(*nodes, attributes: {}, infos: nil, recursive: true) nodes.each do |node| case node when Hash node.each do |name,children| add_node(name,children: [*children], attributes: attributes, infos: infos, recursive: recursive) end else add_node(node, attributes: attributes, infos: infos, recursive: recursive) end end self end |
#clone ⇒ Object
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# File 'lib/dr/base/graph.rb', line 121 def clone Graph.new.build(*all, recursive: false) end |
#connected(*nodes, down: true, up: true, ourselves: true) ⇒ Object
return the connected set containing nodes (following the direction given)
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# File 'lib/dr/base/graph.rb', line 261 def connected(*nodes, down:true, up:true, ourselves: true) nodes=to_nodes(*nodes) onodes=nodes.dup found=[] while !nodes.empty? node=nodes.shift found<<node new_nodes=Set[node] new_nodes.merge(node.children) if down new_nodes.merge(node.parents) if up new_nodes-=(found+nodes) nodes.concat(new_nodes.to_a) end found-=onodes if !ourselves return found end |
#descendants(*nodes, ourselves: true) ⇒ Object
return all childern
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# File 'lib/dr/base/graph.rb', line 283 def descendants(*nodes, ourselves: true) nodes=to_nodes(*nodes) connected(*nodes, up:false, down:true, ourselves: ourselves) end |
#dump(mode: :graph, nodes_list: :roots, show_attr: true, out: [], **_opts) ⇒ Object
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# File 'lib/dr/base/graph.rb', line 236 def dump(mode: :graph, nodes_list: :roots, show_attr: true, out: [], **_opts) n=case nodes_list when :roots; roots when :all; all when Symbol; nodes.select {|n| n.attributes[:nodes_list]} else nodes_list.to_a end case mode when :graph; n.each do |node| node.to_graph(show_attr: show_attr, out: out) end when :list; n.each do |i| out << "- #{i}" end when :dot; out << "digraph gems {" #out << n.map {|node| node.to_dot}.inject(:+).uniq!.join("\n") n.map {|node| node.to_dot(out: out)} out << "}" end return out end |
#each(&b) ⇒ Object
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# File 'lib/dr/base/graph.rb', line 117 def each(&b) @nodes.each(&b) end |
#inspect ⇒ Object
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# File 'lib/dr/base/graph.rb', line 158 def inspect "#{self.class}: #{map {|x| x.to_s(show_attr: false)}}" end |
#names ⇒ Object
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# File 'lib/dr/base/graph.rb', line 128 def names @nodes.map(&:name) end |
#new_node(node, **attributes) ⇒ Object
construct a node (without edges)
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# File 'lib/dr/base/graph.rb', line 166 def new_node(node,**attributes) n=case node when Node node.graph == self ? node : new_node(node.name, **node.attributes) else @nodes.find {|n| n.name == node} || Node.new(node, graph: self) end n.update_attributes(attributes) n end |
#roots ⇒ Object
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# File 'lib/dr/base/graph.rb', line 220 def roots @nodes.select{ |n| n.parents.length == 0}.sort end |
#subgraph(*nodes, complement: false) ⇒ Object
return the subgraph containing all the nodes passed as parameters, and the complementary graph. The union of both may not be the full graph [missing edges] in case the components are connected
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# File 'lib/dr/base/graph.rb', line 329 def subgraph(*nodes, complement: false) nodes=to_nodes(*nodes) subgraph=Graph.new() compgraph=Graph.new() if complement @nodes.each do |node| if nodes.include?(node) n=subgraph.new_node(node) node.children.each do |c| n.add_child(subgraph.new_node(c)) if nodes.include?(c) end else if complement n=compgraph.new_node(node) node.children.each do |c| n.add_child(compgraph.new_node(c)) unless nodes.include?(c) end end end end complement ? (return subgraph, compgraph) : (return subgraph) end |
#to_a ⇒ Object
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# File 'lib/dr/base/graph.rb', line 125 def to_a return @nodes end |
#to_children ⇒ Object
alias to_children to_h
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# File 'lib/dr/base/graph.rb', line 153 def to_children require 'dr/base/converter' Converter.to_hash(@nodes, methods:[:children], recursive: true, compact: true).map { |k,v| [k.name, v.map(&:name)]}.to_h end |
#to_h ⇒ Object
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# File 'lib/dr/base/graph.rb', line 147 def to_h h=to_hash(methods: [:children]) Hash[h.map {|k,v| [k.name, v.map(&:name)]}] end |
#to_hash(methods: [:children,:parents,:attributes], compact: true, recursive: true) ⇒ Object
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# File 'lib/dr/base/graph.rb', line 132 def to_hash(methods: [:children,:parents,:attributes], compact: true, recursive: true) require 'dr/base/converter' Converter.to_hash(@nodes, methods: methods, recursive: recursive, compact: compact) end |
#to_nodes(*nodes) ⇒ Object
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# File 'lib/dr/base/graph.rb', line 255 def to_nodes(*nodes) nodes.map {|n| self[n]}.compact end |
#unneeded(*nodes, needed: nil) ⇒ Object
from a list of nodes, return all nodes that are not descendants of other nodes in the graph needed: the nodes whose descendants we keep, by default the complement of nodes
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# File 'lib/dr/base/graph.rb', line 292 def unneeded(*nodes, needed: nil) nodes=to_nodes(*nodes) if needed needed=to_nodes(needed) else needed=@nodes-nodes end unneeded=[] nodes.each do |node| unneeded << node if (ancestors(node) & needed).empty? end unneeded end |
#unneeded_descendants(*nodes, needed: []) ⇒ Object
like unneeded(descendants(*nodes)) return all dependencies that are not needed by any more other nodes (except the ones we are removing) If some dependencies should be kept (think manual install), add them to the needed parameter
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# File 'lib/dr/base/graph.rb', line 310 def unneeded_descendants(*nodes, needed:[]) nodes=to_nodes(*nodes) needed=to_nodes(*needed) needed-=nodes #nodes to delete are in priority deps=descendants(*nodes) deps-=needed #but for children nodes, needed nodes are in priority unneeded(*deps) end |
#|(graph) ⇒ Object
allow a hash too
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# File 'lib/dr/base/graph.rb', line 228 def |(graph) graph=Graph.new(graph, **{}) unless Graph===graph build(*graph.all, recursive: false) end |