Class: LinkageChecker

Inherits:
Object
  • Object
show all
Defined in:
Library/Homebrew/os/mac/linkage_checker.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(keg, formula = nil) ⇒ LinkageChecker

Returns a new instance of LinkageChecker



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 10

def initialize(keg, formula = nil)
  @keg = keg
  @formula = formula || resolve_formula(keg)
  @brewed_dylibs = Hash.new { |h, k| h[k] = Set.new }
  @system_dylibs = Set.new
  @broken_dylibs = Set.new
  @variable_dylibs = Set.new
  @indirect_deps = []
  @undeclared_deps = []
  @reverse_links = Hash.new { |h, k| h[k] = Set.new }
  @unnecessary_deps = []
  check_dylibs
end

Instance Attribute Details

#brewed_dylibs ⇒ Object (readonly)

Returns the value of attribute brewed_dylibs



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 7

def brewed_dylibs
  @brewed_dylibs
end

#broken_dylibs ⇒ Object (readonly)

Returns the value of attribute broken_dylibs



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 7

def broken_dylibs
  @broken_dylibs
end

#formula ⇒ Object (readonly)

Returns the value of attribute formula



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 6

def formula
  @formula
end

#keg ⇒ Object (readonly)

Returns the value of attribute keg



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 6

def keg
  @keg
end

#reverse_links ⇒ Object (readonly)

Returns the value of attribute reverse_links



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 8

def reverse_links
  @reverse_links
end

#system_dylibs ⇒ Object (readonly)

Returns the value of attribute system_dylibs



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 7

def system_dylibs
  @system_dylibs
end

#undeclared_deps ⇒ Object (readonly)

Returns the value of attribute undeclared_deps



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 8

def undeclared_deps
  @undeclared_deps
end

#unnecessary_deps ⇒ Object (readonly)

Returns the value of attribute unnecessary_deps



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 8

def unnecessary_deps
  @unnecessary_deps
end

#variable_dylibs ⇒ Object (readonly)

Returns the value of attribute variable_dylibs



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 7

def variable_dylibs
  @variable_dylibs
end

Instance Method Details

#broken_dylibs? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 130

def broken_dylibs?
  !@broken_dylibs.empty?
end

#check_dylibs ⇒ Object 



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 24

def check_dylibs
  @keg.find do |file|
    next if file.symlink? || file.directory?
    next unless file.dylib? || file.binary_executable? || file.mach_o_bundle?

    # weakly loaded dylibs may not actually exist on disk, so skip them
    # when checking for broken linkage
    file.dynamically_linked_libraries(except: :LC_LOAD_WEAK_DYLIB).each do |dylib|
      @reverse_links[dylib] << file
      if dylib.start_with? "@"
        @variable_dylibs << dylib
      else
        begin
          owner = Keg.for Pathname.new(dylib)
        rescue NotAKegError
          @system_dylibs << dylib
        rescue Errno::ENOENT
          next if harmless_broken_link?(dylib)
          @broken_dylibs << dylib
        else
          tap = Tab.for_keg(owner).tap
          f = if tap.nil? || tap.core_tap?
            owner.name
          else
            "#{tap}/#{owner.name}"
          end
          @brewed_dylibs[f] << dylib
        end
      end
    end
  end

  @indirect_deps, @undeclared_deps, @unnecessary_deps = check_undeclared_deps if formula
end

#check_undeclared_deps ⇒ Object 



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 59

def check_undeclared_deps
  filter_out = proc do |dep|
    next true if dep.build?
    next false unless dep.optional? || dep.recommended?
    formula.build.without?(dep)
  end
  declared_deps = formula.deps.reject { |dep| filter_out.call(dep) }.map(&:name)
  recursive_deps = keg.to_formula.runtime_dependencies.map { |dep| dep.to_formula.full_name }
  declared_dep_names = declared_deps.map { |dep| dep.split("/").last }
  indirect_deps = []
  undeclared_deps = []
  @brewed_dylibs.each_key do |full_name|
    name = full_name.split("/").last
    next if name == formula.name
    if recursive_deps.include?(name)
      indirect_deps << full_name unless declared_dep_names.include?(name)
    else
      undeclared_deps << full_name
    end
  end
  sort_by_formula_full_name!(indirect_deps)
  sort_by_formula_full_name!(undeclared_deps)
  unnecessary_deps = declared_dep_names.reject do |full_name|
    name = full_name.split("/").last
    next true if Formula[name].bin.directory?
    @brewed_dylibs.keys.map { |x| x.split("/").last }.include?(name)
  end
  [indirect_deps, undeclared_deps, unnecessary_deps]
end

#display_normal_output ⇒ Object 



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 101

def display_normal_output
  display_items "System libraries", @system_dylibs
  display_items "Homebrew libraries", @brewed_dylibs
  display_items "Indirect dependencies with linkage", @indirect_deps
  display_items "Variable-referenced libraries", @variable_dylibs
  display_items "Missing libraries", @broken_dylibs
  display_items "Undeclared dependencies with linkage", @undeclared_deps
  display_items "Dependencies with no linkage", @unnecessary_deps
end

#display_reverse_output ⇒ Object 



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 111

def display_reverse_output
  return if @reverse_links.empty?
  sorted = @reverse_links.sort
  sorted.each do |dylib, files|
    puts dylib
    files.each do |f|
      unprefixed = f.to_s.strip_prefix "#{@keg}/"
      puts "  #{unprefixed}"
    end
    puts unless dylib == sorted.last[0]
  end
end

#display_test_output ⇒ Object 



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 124

def display_test_output
  display_items "Missing libraries", @broken_dylibs
  display_items "Possible unnecessary dependencies", @unnecessary_deps
  puts "No broken dylib links" if @broken_dylibs.empty?
end

#sort_by_formula_full_name!(arr) ⇒ Object 



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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 89

def sort_by_formula_full_name!(arr)
  arr.sort! do |a, b|
    if a.include?("/") && !b.include?("/")
      1
    elsif !a.include?("/") && b.include?("/")
      -1
    else
      a <=> b
    end
  end
end

#undeclared_deps? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 134

def undeclared_deps?
  !@undeclared_deps.empty?
end

#unnecessary_deps? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'Library/Homebrew/os/mac/linkage_checker.rb', line 138

def unnecessary_deps?
  !@unnecessary_deps.empty?
end