Class: DepAnalyzer

Inherits:
Cache show all
Defined in:
lib/dep_analyzer.rb

Overview

Abstract class to analyze dependencies. Intended to be subclassed for a given dependency system (eg rubygems). Subclasses must implement #deps, #installed, and #outdated at the very least.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Cache

#cache

Constructor Details

#initialize ⇒ DepAnalyzer

:nodoc:



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# File 'lib/dep_analyzer.rb', line 111

def initialize # :nodoc:
  super ".#{self.class}.cache"
  @g = Graph.new
end

Instance Attribute Details

#g ⇒ Object

:nodoc:



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# File 'lib/dep_analyzer.rb', line 109

def g
  @g
end

Instance Method Details

#decorate ⇒ Object

Allows your subclass to add extra fancy stuff to the graph when analysis is finished.



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# File 'lib/dep_analyzer.rb', line 120

def decorate
  # nothing to do by default
end

#deps(port) ⇒ Object

Return the dependencies for a given port.

Raises:

  • (NotImplementedError) 


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# File 'lib/dep_analyzer.rb', line 127

def deps port
  raise NotImplementedError, "subclass responsibility"
end

#installed ⇒ Object

Return all installed items on the system.

Raises:

  • (NotImplementedError) 


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# File 'lib/dep_analyzer.rb', line 134

def installed
  raise NotImplementedError, "subclass responsibility"
end

#outdated ⇒ Object

Return all outdated items currently installed.

Raises:

  • (NotImplementedError) 


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# File 'lib/dep_analyzer.rb', line 141

def outdated
  raise NotImplementedError, "subclass responsibility"
end

#run(argv = ARGV) ⇒ Object

Do the actual work.



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# File 'lib/dep_analyzer.rb', line 148

def run(argv = ARGV)
  setup

  ports = {}
  installed.each do |port|
    ports[port] = nil
  end

  old = {}
  outdated.each do |port|
    old[port] = nil
  end

  all_ports = ports.keys

  ports.each_key do |port|
    deps = self.deps(port)
    # remove things that don't intersect with installed list
    deps -= (deps - all_ports)
    deps.each do |dep|
      g[port] << dep
    end
    ports[port] = deps
  end

  blue   = g.color "blue"
  purple = g.color "purple4"
  red    = g.color "red"

  indies = ports.keys - ports.minvert.keys
  indies.each do |k|
    blue << g[k]
  end

  old.each do |k,v|
    if indies.include? k then
      purple << g[k]
    else
      red << g[k]
    end
  end

  decorate

  puts "Looks like you can nuke:\n\t#{indies.sort.join("\n\t")}"

  unless argv.empty? then
    argv.each do |pkg|
      hits = ports.transitive[pkg]
      sorted = ports.tsort.reverse
      topo = [pkg] + sorted.select { |o| hits.include? o }
      prune = ports.dup
      topo.each do |k|
        prune.delete(k)
      end
      topo -= prune.values.flatten.uniq

      puts topo.join(' ')
    end
  end

  g
end

#setup ⇒ Object

Allows subclasses to do any preparation before the run.



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# File 'lib/dep_analyzer.rb', line 215

def setup
  # nothing to do by default
end