Add options to run clang-tidy with the compiler

Create a <LANG>_CLANG_TIDY target property (initialized by a
CMAKE_<LANG>_CLANG_TIDY variable) to specify a clang-tidy command line
to be run along with the compiler.

1 files changed, 59 insertions, 21 deletions

diff --git a/Source/cmcmd.cxx b/Source/cmcmd.cxx
index e9d77b2..3c28c35 100644
--- a/Source/cmcmd.cxx
+++ b/Source/cmcmd.cxx
@@ -297,12 +297,14 @@ int cmcmd::ExecuteCMakeCommand(std::vector<std::string>& args)
       if (args.size() < 3)
         {
         std::cerr << "__run_iwyu Usage: -E __run_iwyu [--iwyu=/path/iwyu]"
-          " -- compile command\n";
+          " [--tidy=/path/tidy] -- compile command\n";
         return 1;
         }
       bool doing_options = true;
       std::vector<std::string> orig_cmd;
       std::string iwyu;
+      std::string tidy;
+      std::string sourceFile;
       for (std::string::size_type cc = 2; cc < args.size(); cc ++)
         {
         std::string const& arg = args[cc];
@@ -314,6 +316,14 @@ int cmcmd::ExecuteCMakeCommand(std::vector<std::string>& args)
           {
           iwyu = arg.substr(7);
           }
+        else if (doing_options && cmHasLiteralPrefix(arg, "--tidy="))
+          {
+          tidy = arg.substr(7);
+          }
+        else if (doing_options && cmHasLiteralPrefix(arg, "--source="))
+          {
+          sourceFile = arg.substr(9);
+          }
         else if (doing_options)
           {
           std::cerr << "__run_iwyu given unknown argument: " << arg << "\n";
@@ -324,9 +334,14 @@ int cmcmd::ExecuteCMakeCommand(std::vector<std::string>& args)
           orig_cmd.push_back(arg);
           }
         }
-      if (iwyu.empty())
+      if (tidy.empty() && iwyu.empty())
+        {
+        std::cerr << "__run_iwyu missing --tidy= or --iwyu=\n";
+        return 1;
+        }
+      if (!tidy.empty() && sourceFile.empty())
         {
-        std::cerr << "__run_iwyu missing --iwyu=\n";
+        std::cerr << "__run_iwyu --tidy= requires --source=\n";
         return 1;
         }
       if (orig_cmd.empty())
@@ -335,29 +350,52 @@ int cmcmd::ExecuteCMakeCommand(std::vector<std::string>& args)
         return 1;
         }
 
-      // Construct the iwyu command line by taking what was given
-      // and adding all the arguments we give to the compiler.
-      std::vector<std::string> iwyu_cmd;
-      cmSystemTools::ExpandListArgument(iwyu, iwyu_cmd, true);
-      iwyu_cmd.insert(iwyu_cmd.end(), orig_cmd.begin()+1, orig_cmd.end());
-
-      // Run the iwyu command line.  Capture its stderr and hide its stdout.
       int ret = 0;
-      std::string stdErr;
-      if(!cmSystemTools::RunSingleCommand(iwyu_cmd, 0, &stdErr, &ret,
-                                          0, cmSystemTools::OUTPUT_NONE))
+
+      if (!iwyu.empty())
         {
-        std::cerr << "Error running '" << iwyu_cmd[0] << "': "
-                  << stdErr << "\n";
-        return 1;
+        // Construct the iwyu command line by taking what was given
+        // and adding all the arguments we give to the compiler.
+        std::vector<std::string> iwyu_cmd;
+        cmSystemTools::ExpandListArgument(iwyu, iwyu_cmd, true);
+        iwyu_cmd.insert(iwyu_cmd.end(), orig_cmd.begin()+1, orig_cmd.end());
+
+        // Run the iwyu command line.  Capture its stderr and hide its stdout.
+        std::string stdErr;
+        if(!cmSystemTools::RunSingleCommand(iwyu_cmd, 0, &stdErr, &ret,
+                                            0, cmSystemTools::OUTPUT_NONE))
+          {
+          std::cerr << "Error running '" << iwyu_cmd[0] << "': "
+                    << stdErr << "\n";
+          return 1;
+          }
+
+        // Warn if iwyu reported anything.
+        if(stdErr.find("should remove these lines:") != stdErr.npos
+           || stdErr.find("should add these lines:") != stdErr.npos)
+          {
+          std::cerr << "Warning: include-what-you-use reported diagnostics:\n"
+                    << stdErr << "\n";
+          }
         }
 
-      // Warn if iwyu reported anything.
-      if(stdErr.find("should remove these lines:") != stdErr.npos
-         || stdErr.find("should add these lines:") != stdErr.npos)
+      if (!tidy.empty())
         {
-        std::cerr << "Warning: include-what-you-use reported diagnostics:\n"
-                  << stdErr << "\n";
+        // Construct the clang-tidy command line by taking what was given
+        // and adding all the arguments we give to the compiler.
+        std::vector<std::string> tidy_cmd;
+        cmSystemTools::ExpandListArgument(tidy, tidy_cmd, true);
+        tidy_cmd.push_back(sourceFile);
+        tidy_cmd.push_back("--");
+        tidy_cmd.insert(tidy_cmd.end(), orig_cmd.begin()+1, orig_cmd.end());
+
+        // Run the tidy command line.
+        if(!cmSystemTools::RunSingleCommand(tidy_cmd, 0, 0, &ret, 0,
+                                            cmSystemTools::OUTPUT_PASSTHROUGH))
+          {
+          std::cerr << "Error running '" << tidy_cmd[0] << "'\n";
+          return 1;
+          }
         }
 
       // Now run the real compiler command and return its result value.