gn desc: printing public_deps without --all and --tree

tools/gn/desc_builder.cc

Index: tools/gn/desc_builder.cc
diff --git a/tools/gn/desc_builder.cc b/tools/gn/desc_builder.cc
index 965ec921f10a12be760ee51aba699debb71b5a23..9080c3024faffe6df55397290e977f4a8ae9d16a 100644
--- a/tools/gn/desc_builder.cc
+++ b/tools/gn/desc_builder.cc
@@ -406,6 +406,15 @@ class TargetDescBuilder : public BaseDescBuilder {
     if (what(variables::kDeps))
       res->SetWithoutPathExpansion(variables::kDeps, RenderDeps());
 
+    // By default RenderDeps only renders Target::DEPS_PRIVATE, in that case
+    // the output should be enriched also with Target::DEPS_PUBLIC.
+    if (!tree_ && !all_) {
+      if (what(variables::kPublicDeps)) {
+        res->SetWithoutPathExpansion(variables::kPublicDeps,
+                                     RenderPublicDeps());
+      }
+    }
+
     // Runtime deps are special, print only when explicitly asked for and not in
     // overview mode.
     if (what_.find("runtime_deps") != what_.end())
@@ -511,7 +520,7 @@ class TargetDescBuilder : public BaseDescBuilder {
       } else {
         // Show direct dependencies only.
         std::vector<const Target*> deps;
-        for (const auto& pair : target_->GetDeps(Target::DEPS_ALL))
+        for (const auto& pair : target_->GetDeps(Target::DEPS_PRIVATE))
           deps.push_back(pair.ptr);
         std::sort(deps.begin(), deps.end());
         commands::FilterAndPrintTargets(&deps, res.get());
@@ -521,6 +530,19 @@ class TargetDescBuilder : public BaseDescBuilder {
     return std::move(res);
   }
 
+  ValuePtr RenderPublicDeps() {
+    auto res = base::MakeUnique<base::ListValue>();
+
+    std::vector<const Target*> deps;
+    for (const auto& pair : target_->GetDeps(Target::DEPS_PUBLIC))
+      deps.push_back(pair.ptr);
+
+    std::sort(deps.begin(), deps.end());
+    commands::FilterAndPrintTargets(&deps, res.get());
+
+    return std::move(res);
+  }
+
   ValuePtr RenderRuntimeDeps() {
     auto res = base::MakeUnique<base::ListValue>();