deps should respect skip-recommended

For example, `brew deps libass --skip-recommended` shouldn't print
harfbuzz because, even though libass builds with harfbuzz when harfbuzz
is not skipped, we asked to skip recommended, of which harfbuzz is one.

The corresponding change is made for `brew uses` as well.

Thanks to Xu Cheng for contributing the code. Any errors are mine.

Closes #129.

Signed-off-by: ilovezfs <ilovezfs@icloud.com>

Library/Homebrew/cmd/deps.rb

@@ -85,10 +85,22 @@ module Homebrew
 
     if recursive
       deps = f.recursive_dependencies do |dependent, dep|
-        Dependency.prune if ignores.any? { |ignore| dep.send(ignore) } && !includes.any? { |include| dep.send(include) } && !dependent.build.with?(dep)
+        if dep.recommended?
+          Dependency.prune if ignores.include?("recommended?") || dependent.build.without?(dep)
+        elsif dep.optional?
+          Dependency.prune if !includes.include?("optional?") && !dependent.build.with?(dep)
+        elsif dep.build?
+          Dependency.prune unless includes.include?("build?")
+        end
       end
       reqs = f.recursive_requirements do |dependent, req|
-        Requirement.prune if ignores.any? { |ignore| req.send(ignore) } && !includes.any? { |include| req.send(include) } && !dependent.build.with?(req)
+        if req.recommended?
+          Requirement.prune if ignores.include?("recommended?") || dependent.build.without?(req)
+        elsif req.optional?
+          Requirement.prune if !includes.include?("optional?") && !dependent.build.with?(req)
+        elsif req.build?
+          Requirement.prune unless includes.include?("build?")
+        end
       end
     else
       deps = f.deps.reject do |dep|

Library/Homebrew/cmd/uses.rb

@@ -48,10 +48,22 @@ module Homebrew
         begin
           if recursive
             deps = f.recursive_dependencies do |dependent, dep|
-              Dependency.prune if ignores.any? { |ignore| dep.send(ignore) } && !includes.any? { |include| dep.send(include) } && !dependent.build.with?(dep)
+              if dep.recommended?
+                Dependency.prune if ignores.include?("recommended?") || dependent.build.without?(dep)
+              elsif dep.optional?
+                Dependency.prune if !includes.include?("optional?") && !dependent.build.with?(dep)
+              elsif dep.build?
+                Dependency.prune unless includes.include?("build?")
+              end
             end
             reqs = f.recursive_requirements do |dependent, req|
-              Requirement.prune if ignores.any? { |ignore| req.send(ignore) } && !includes.any? { |include| req.send(include) } && !dependent.build.with?(req)
+              if req.recommended?
+                Requirement.prune if ignores.include?("recommended?") || dependent.build.without?(req)
+              elsif req.optional?
+                Requirement.prune if !includes.include?("optional?") && !dependent.build.with?(req)
+              elsif req.build?
+                Requirement.prune unless includes.include?("build?")
+              end
             end
             deps.any? { |dep| dep.to_formula.full_name == ff.full_name rescue dep.name == ff.name } ||
             reqs.any? { |req| req.name == ff.name || [ff.name, ff.full_name].include?(req.default_formula) }