From 34c4108bbcb8774821ac857e0ad0a92294ee8b0b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20St=C3=BCrmer?= <michael.stuermer@schaeffler.com>
Date: Wed, 30 Aug 2017 15:30:32 +0200
Subject: add HasOnlyEmptyCommandLines() method to cmCustomCommandGenerator

---
 Source/cmCustomCommandGenerator.cxx | 12 ++++++++++++
 Source/cmCustomCommandGenerator.h   |  1 +
 2 files changed, 13 insertions(+)

diff --git a/Source/cmCustomCommandGenerator.cxx b/Source/cmCustomCommandGenerator.cxx
index fdc0a97..c6a2800 100644
--- a/Source/cmCustomCommandGenerator.cxx
+++ b/Source/cmCustomCommandGenerator.cxx
@@ -97,6 +97,18 @@ const char* cmCustomCommandGenerator::GetArgv0Location(unsigned int c) const
   return nullptr;
 }
 
+bool cmCustomCommandGenerator::HasOnlyEmptyCommandLines() const
+{
+  for (size_t i = 0; i < this->CommandLines.size(); ++i) {
+    for (size_t j = 0; j < this->CommandLines[i].size(); ++j) {
+      if (!this->CommandLines[i][j].empty()) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
 std::string cmCustomCommandGenerator::GetCommand(unsigned int c) const
 {
   if (const char* emulator = this->GetCrossCompilingEmulator(c)) {
diff --git a/Source/cmCustomCommandGenerator.h b/Source/cmCustomCommandGenerator.h
index ea33b51..34fd653 100644
--- a/Source/cmCustomCommandGenerator.h
+++ b/Source/cmCustomCommandGenerator.h
@@ -40,6 +40,7 @@ public:
   std::vector<std::string> const& GetOutputs() const;
   std::vector<std::string> const& GetByproducts() const;
   std::vector<std::string> const& GetDepends() const;
+  bool HasOnlyEmptyCommandLines() const;
 };
 
 #endif
-- 
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