Merge pull request #1537 from umireon/nonfatal-requirement-message-once

install: suppress redundunt warnings with `depends_on` requirement

Library/Homebrew/formula_installer.rb

@@ -52,6 +52,7 @@ class FormulaInstaller
     @debug = false
     @options = Options.new
     @invalid_option_names = []
+    @requirement_messages = []
 
     @@attempted ||= Set.new
 
@@ -251,6 +252,7 @@ class FormulaInstaller
         opoo "Bottle installation failed: building from source."
         raise BuildToolsError, [formula] unless DevelopmentTools.installed?
       else
+        puts_requirement_messages
         @poured_bottle = true
       end
     end
@@ -260,6 +262,7 @@ class FormulaInstaller
     unless @poured_bottle
       not_pouring = !pour_bottle || @pour_failed
       compute_and_install_dependencies if not_pouring && !ignore_deps?
+      puts_requirement_messages
       build
       clean
 
@@ -334,17 +337,21 @@ class FormulaInstaller
   end
 
   def check_requirements(req_map)
+    @requirement_messages = []
     fatals = []
 
     req_map.each_pair do |dependent, reqs|
       next if dependent.installed?
       reqs.each do |req|
-        puts "#{dependent}: #{req.message}"
+        @requirement_messages << "#{dependent}: #{req.message}"
         fatals << req if req.fatal?
       end
     end
 
-    raise UnsatisfiedRequirements, fatals unless fatals.empty?
+    return if fatals.empty?
+
+    puts_requirement_messages
+    raise UnsatisfiedRequirements, fatals
   end
 
   def install_requirement_default_formula?(req, dependent, build)
@@ -831,4 +838,10 @@ class FormulaInstaller
     @@locked.clear
     @hold_locks = false
   end
+
+  def puts_requirement_messages
+    return unless @requirement_messages
+    return if @requirement_messages.empty?
+    puts @requirement_messages
+  end
 end

Library/Homebrew/test/install_test.rb

@@ -27,4 +27,27 @@ class IntegrationCommandTestInstall < IntegrationCommandTestCase
     assert_match "testball1: this formula has no --with-fo option so it will be ignored!",
       cmd("install", "testball1", "--with-fo")
   end
+
+  def test_install_with_nonfatal_requirement
+    setup_test_formula "testball1", <<-EOS.undent
+      class NonFatalRequirement < Requirement
+        satisfy { false }
+      end
+      depends_on NonFatalRequirement
+    EOS
+    message = "NonFatalRequirement unsatisfied!"
+    assert_equal 1, cmd("install", "testball1").scan(message).size
+  end
+
+  def test_install_with_fatal_requirement
+    setup_test_formula "testball1", <<-EOS.undent
+      class FatalRequirement < Requirement
+        fatal true
+        satisfy { false }
+      end
+      depends_on FatalRequirement
+    EOS
+    message = "FatalRequirement unsatisfied!"
+    assert_equal 1, cmd_fail("install", "testball1").scan(message).size
+  end
 end