linkage: check undeclared dependencies for --test

Also allowing access results for LinkageChecker

Library/Homebrew/dev-cmd/linkage.rb

@@ -16,27 +16,26 @@ require "formula"
 
 module Homebrew
   def linkage
-    found_broken_dylibs = false
     ARGV.kegs.each do |keg|
       ohai "Checking #{keg.name} linkage" if ARGV.kegs.size > 1
       result = LinkageChecker.new(keg)
       if ARGV.include?("--test")
         result.display_test_output
+        if result.broken_dylibs? || result.undeclared_deps?
+          Homebrew.failed = true
+        end
       elsif ARGV.include?("--reverse")
         result.display_reverse_output
       else
         result.display_normal_output
       end
-      found_broken_dylibs = true unless result.broken_dylibs.empty?
-    end
-    if ARGV.include?("--test") && found_broken_dylibs
-      exit 1
     end
   end
 
   class LinkageChecker
     attr_reader :keg
-    attr_reader :broken_dylibs
+    attr_reader :brewed_dylibs, :system_dylibs, :broken_dylibs, :variable_dylibs
+    attr_reader :undeclared_deps, :reverse_links
 
     def initialize(keg)
       @keg = keg
@@ -44,6 +43,7 @@ module Homebrew
       @system_dylibs = Set.new
       @broken_dylibs = Set.new
       @variable_dylibs = Set.new
+      @undeclared_deps = []
       @reverse_links = Hash.new { |h, k| h[k] = Set.new }
       check_dylibs
     end
@@ -76,7 +76,6 @@ module Homebrew
         @undeclared_deps -= [f.name]
       rescue FormulaUnavailableError
         opoo "Formula unavailable: #{keg.name}"
-        @undeclared_deps = []
       end
     end
 
@@ -104,6 +103,16 @@ module Homebrew
     def display_test_output
       display_items "Missing libraries", @broken_dylibs
       puts "No broken dylib links" if @broken_dylibs.empty?
+      display_items "Possible undeclared dependencies", @undeclared_deps
+      puts "No undeclared dependencies" if @undeclared_deps.empty?
+    end
+
+    def broken_dylibs?
+      !@broken_dylibs.empty?
+    end
+
+    def undeclared_deps?
+      !@undeclared_deps.empty?
     end
 
     private