Autogen: Add and use QtAutoGen::Tools method

Source/cmQtAutoGen.cxx

@@ -99,6 +99,41 @@ std::string cmQtAutoGen::GeneratorNameUpper(GeneratorT genType)
   return cmSystemTools::UpperCase(cmQtAutoGen::GeneratorName(genType));
 }
 
+std::string cmQtAutoGen::Tools(bool moc, bool uic, bool rcc)
+{
+  std::string res;
+  std::vector<std::string> lst;
+  if (moc) {
+    lst.emplace_back("AUTOMOC");
+  }
+  if (uic) {
+    lst.emplace_back("AUTOUIC");
+  }
+  if (rcc) {
+    lst.emplace_back("AUTORCC");
+  }
+  switch (lst.size()) {
+    case 1:
+      res += lst.at(0);
+      break;
+    case 2:
+      res += lst.at(0);
+      res += " and ";
+      res += lst.at(1);
+      break;
+    case 3:
+      res += lst.at(0);
+      res += ", ";
+      res += lst.at(1);
+      res += " and ";
+      res += lst.at(2);
+      break;
+    default:
+      break;
+  }
+  return res;
+}
+
 std::string cmQtAutoGen::Quoted(std::string const& text)
 {
   static const char* rep[18] = { "\\", "\\\\", "\"", "\\\"", "\a", "\\a",

Source/cmQtAutoGen.h

@@ -60,6 +60,9 @@ public:
   /// @brief Returns the generator name in upper case
   static std::string GeneratorNameUpper(GeneratorT genType);
 
+  /// @brief Returns a string with the requested tool names
+  static std::string Tools(bool moc, bool uic, bool rcc);
+
   /// @brief Returns the string escaped and enclosed in quotes
   static std::string Quoted(std::string const& text);
 

Source/cmQtAutoGenGlobalInitializer.cxx

@@ -102,19 +102,7 @@ cmQtAutoGenGlobalInitializer::cmQtAutoGenGlobalInitializer(
           std::string msg = "AUTOGEN: No valid Qt version found for target ";
           msg += target->GetName();
           msg += ". ";
-          {
-            std::vector<std::string> lst;
-            if (mocDisabled) {
-              lst.emplace_back("AUTOMOC");
-            }
-            if (uicDisabled) {
-              lst.emplace_back("AUTOUIC");
-            }
-            if (rccDisabled) {
-              lst.emplace_back("AUTORCC");
-            }
-            msg += cmJoin(lst, ", ");
-          }
+          msg += cmQtAutoGen::Tools(mocDisabled, uicDisabled, rccDisabled);
           msg += " disabled.  Consider adding:\n";
           if (uicDisabled) {
             msg += "  find_package(Qt5 COMPONENTS Widgets)\n";

Tests/RunCMake/Autogen/NoQt-stderr.txt

@@ -1,5 +1,5 @@
 ^CMake Warning \(dev\) in CMakeLists.txt:
-  AUTOGEN: No valid Qt version found for target main.  AUTOMOC, AUTOUIC,
+  AUTOGEN: No valid Qt version found for target main.  AUTOMOC, AUTOUIC and
   AUTORCC disabled.  Consider adding:
 
     find_package\(Qt5 COMPONENTS Widgets\)