clang-tidy: Simplify boolean expressions

.clang-tidy

@@ -32,7 +32,6 @@ readability-*,\
 -readability-inconsistent-declaration-parameter-name,\
 -readability-named-parameter,\
 -readability-redundant-declaration,\
--readability-simplify-boolean-expr,\
 "
 HeaderFilterRegex: 'Source/cm[^/]*\.(h|hxx|cxx)$'
 CheckOptions:

Source/CPack/OSXScriptLauncher.cxx

@@ -46,8 +46,7 @@ int main(int argc, char* argv[])
 
   // get the file system path of the url as a cstring
   // in an encoding suitable for posix apis
-  if (CFURLGetFileSystemRepresentation(scriptFileURL, true, path, PATH_MAX) ==
-      false) {
+  if (!CFURLGetFileSystemRepresentation(scriptFileURL, true, path, PATH_MAX)) {
     DebugError("CFURLGetFileSystemRepresentation failed");
     return 1;
   }

Source/CPack/cmCPackFreeBSDGenerator.cxx

@@ -257,13 +257,8 @@ void cmCPackFreeBSDGenerator::write_manifest_fields(
 static bool ignore_file(const std::string& filename)
 {
   struct stat statbuf;
-
-  if (!((stat(filename.c_str(), &statbuf) >= 0) &&
-        ((statbuf.st_mode & S_IFMT) == S_IFREG))) {
-    return true;
-  }
-  // May be other reasons to return false
-  return false;
+  return stat(filename.c_str(), &statbuf) < 0 ||
+    (statbuf.st_mode & S_IFMT) != S_IFREG;
 }
 
 // Write the given list of @p files to the manifest stream @p s,

Source/cmGeneratorExpressionDAGChecker.cxx

@@ -55,7 +55,7 @@ void cmGeneratorExpressionDAGChecker::Initialize()
 
   if (CheckResult == DAG &&
       (CM_FOR_EACH_TRANSITIVE_PROPERTY_METHOD(
-        TEST_TRANSITIVE_PROPERTY_METHOD) false)) // NOLINT(clang-tidy)
+        TEST_TRANSITIVE_PROPERTY_METHOD) false)) // NOLINT(*)
 #undef TEST_TRANSITIVE_PROPERTY_METHOD
   {
     std::map<cmGeneratorTarget const*, std::set<std::string>>::const_iterator

Source/cmGeneratorExpressionNode.cxx

@@ -1257,7 +1257,7 @@ static const struct TargetPropertyNode : public cmGeneratorExpressionNode
 #define TRANSITIVE_PROPERTY_COMPARE(PROPERTY)                                 \
   (#PROPERTY == propertyName || "INTERFACE_" #PROPERTY == propertyName) ||
         if (CM_FOR_EACH_TRANSITIVE_PROPERTY_NAME(
-              TRANSITIVE_PROPERTY_COMPARE) false) { // NOLINT(clang-tidy)
+              TRANSITIVE_PROPERTY_COMPARE) false) { // NOLINT(*)
           reportError(
             context, content->GetOriginalExpression(),
             "$<TARGET_PROPERTY:...> expression in link libraries "

Source/cmMachO.cxx

@@ -52,10 +52,7 @@ bool peek(cmsys::ifstream& fin, T& v)
 template <typename T>
 bool read(cmsys::ifstream& fin, T& v)
 {
-  if (!fin.read(reinterpret_cast<char*>(&v), sizeof(T))) {
-    return false;
-  }
-  return true;
+  return !!fin.read(reinterpret_cast<char*>(&v), sizeof(T));
 }
 
 // read from the file and fill multiple data structures where
@@ -67,10 +64,7 @@ bool read(cmsys::ifstream& fin, std::vector<T>& v)
   if (v.empty()) {
     return true;
   }
-  if (!fin.read(reinterpret_cast<char*>(&v[0]), sizeof(T) * v.size())) {
-    return false;
-  }
-  return true;
+  return !!fin.read(reinterpret_cast<char*>(&v[0]), sizeof(T) * v.size());
 }
 }
 

Source/cmQtAutoGenInitializer.cxx

@@ -1231,11 +1231,7 @@ bool cmQtAutoGenInitializer::SetupCustomTargets()
   }
 
   // Write AUTORCC info files
-  if (this->Rcc.Enabled && !this->SetupWriteRccInfo()) {
-    return false;
-  }
-
-  return true;
+  return !this->Rcc.Enabled || this->SetupWriteRccInfo();
 }
 
 bool cmQtAutoGenInitializer::SetupWriteAutogenInfo()

Source/cmServer.cxx

@@ -417,7 +417,7 @@ static void __start_thread(void* arg)
   auto server = static_cast<cmServerBase*>(arg);
   std::string error;
   bool success = server->Serve(&error);
-  if (!success || error.empty() == false) {
+  if (!success || !error.empty()) {
     std::cerr << "Error during serve: " << error << std::endl;
   }
 }

Source/cmSourceGroupCommand.cxx

@@ -254,16 +254,12 @@ bool cmSourceGroupCommand::InitialPass(std::vector<std::string> const& args,
 bool cmSourceGroupCommand::checkArgumentsPreconditions(
   const ParsedArguments& parsedArguments, std::string& errorMsg) const
 {
-  if (!checkSingleParameterArgumentPreconditions(kPrefixOptionName,
-                                                 parsedArguments, errorMsg) ||
-      !checkSingleParameterArgumentPreconditions(kTreeOptionName,
-                                                 parsedArguments, errorMsg) ||
-      !checkSingleParameterArgumentPreconditions(kRegexOptionName,
-                                                 parsedArguments, errorMsg)) {
-    return false;
-  }
-
-  return true;
+  return checkSingleParameterArgumentPreconditions(
+           kPrefixOptionName, parsedArguments, errorMsg) &&
+    checkSingleParameterArgumentPreconditions(kTreeOptionName, parsedArguments,
+                                              errorMsg) &&
+    checkSingleParameterArgumentPreconditions(kRegexOptionName,
+                                              parsedArguments, errorMsg);
 }
 
 bool cmSourceGroupCommand::processTree(ParsedArguments& parsedArguments,
@@ -286,12 +282,8 @@ bool cmSourceGroupCommand::processTree(ParsedArguments& parsedArguments,
   std::set<std::string> sourceGroupPaths =
     getSourceGroupFilesPaths(root, filesVector);
 
-  if (!addFilesToItsSourceGroups(root, sourceGroupPaths, prefix,
-                                 *(this->Makefile), errorMsg)) {
-    return false;
-  }
-
-  return true;
+  return addFilesToItsSourceGroups(root, sourceGroupPaths, prefix,
+                                   *(this->Makefile), errorMsg);
 }
 
 bool cmSourceGroupCommand::checkSingleParameterArgumentPreconditions(