Merge topic 'autogen-predefs-emscripten'

8d1803d463 AutoGen: Run batch scripts using cmd.exe on windows platforms explicitly
9ab270f47d cmSystemTools: Add GetComspec method to get cmd on Windows

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !9733

Source/cmGlobalNinjaGenerator.cxx

@@ -573,13 +573,7 @@ cmGlobalNinjaGenerator::cmGlobalNinjaGenerator(cmake* cm)
   cm->GetState()->SetWindowsShell(true);
 
   // Attempt to use full path to COMSPEC, default "cmd.exe"
-  std::string comspec;
-  if (cmSystemTools::GetEnv("COMSPEC", comspec) &&
-      cmSystemTools::FileIsFullPath(comspec)) {
-    this->Comspec = comspec;
-  } else {
-    this->Comspec = "cmd.exe";
-  }
+  this->Comspec = cmSystemTools::GetComspec();
 #endif
   cm->GetState()->SetNinja(true);
   this->FindMakeProgramFile = "CMakeNinjaFindMake.cmake";

Source/cmQtAutoMocUic.cxx

@@ -345,6 +345,8 @@ public:
     void MaybeWriteResponseFile(std::string const& outputFile,
                                 std::vector<std::string>& cmd) const;
 
+    static void MaybePrependCmdExe(std::vector<std::string>& cmd);
+
     /** @brief Run an external process. Use only during Process() call!  */
     bool RunProcess(GenT genType, cmWorkerPool::ProcessResultT& result,
                     std::vector<std::string> const& command,
@@ -848,6 +850,54 @@ void cmQtAutoMocUicT::JobT::MaybeWriteResponseFile(
 #endif
 }
 
+/*
+ *  According to the CreateProcessW documentation which is the underlying
+ *  function for all RunProcess calls:
+ *
+ *  "To run a batch file, you must start the command interpreter; set"
+ *  "lpApplicationName to cmd.exe and set lpCommandLine to the following"
+ *  "arguments: /c plus the name of the batch file."
+ *
+ *  we should to take care of the correctness of the command line when
+ *  attempting to execute the batch files.
+ *
+ *  Also cmd.exe is unable to parse batch file names correctly if they
+ *  contain spaces. This function uses cmSystemTools::GetShortPath conversion
+ *  to suppress this behavior.
+ *
+ *  The function is noop on platforms different from the pure WIN32 one.
+ */
+void cmQtAutoMocUicT::JobT::MaybePrependCmdExe(
+  std::vector<std::string>& cmdLine)
+{
+#if defined(_WIN32) && !defined(__CYGWIN__)
+  if (!cmdLine.empty()) {
+    const auto& applicationName = cmdLine.at(0);
+    if (cmSystemTools::StringEndsWith(applicationName, ".bat") ||
+        cmSystemTools::StringEndsWith(applicationName, ".cmd")) {
+      std::vector<std::string> output;
+      output.reserve(cmdLine.size() + 2);
+      output.emplace_back(cmSystemTools::GetComspec());
+      output.emplace_back("/c");
+      std::string tmpShortPath;
+      if (applicationName.find(' ') != std::string::npos &&
+          cmSystemTools::GetShortPath(applicationName, tmpShortPath)) {
+        // If the batch file name contains spaces convert it to the windows
+        // short path. Otherwise it might cause issue when running cmd.exe.
+        output.emplace_back(tmpShortPath);
+      } else {
+        output.push_back(applicationName);
+      }
+      std::move(cmdLine.begin() + 1, cmdLine.end(),
+                std::back_inserter(output));
+      cmdLine = std::move(output);
+    }
+  }
+#else
+  static_cast<void>(cmdLine);
+#endif
+}
+
 bool cmQtAutoMocUicT::JobT::RunProcess(GenT genType,
                                        cmWorkerPool::ProcessResultT& result,
                                        std::vector<std::string> const& command,
@@ -891,6 +941,9 @@ void cmQtAutoMocUicT::JobMocPredefsT::Process()
       cm::append(cmd, this->MocConst().OptionsIncludes);
       // Check if response file is necessary
       MaybeWriteResponseFile(this->MocConst().PredefsFileAbs, cmd);
+
+      MaybePrependCmdExe(cmd);
+
       // Execute command
       if (!this->RunProcess(GenT::MOC, result, cmd, reason.get())) {
         this->LogCommandError(GenT::MOC,
@@ -2090,6 +2143,7 @@ void cmQtAutoMocUicT::JobCompileMocT::Process()
     cmd.push_back(sourceFile);
 
     MaybeWriteResponseFile(outputFile, cmd);
+    MaybePrependCmdExe(cmd);
   }
 
   // Execute moc command
@@ -2156,6 +2210,8 @@ void cmQtAutoMocUicT::JobCompileUicT::Process()
   cmd.emplace_back(outputFile);
   cmd.emplace_back(sourceFile);
 
+  MaybePrependCmdExe(cmd);
+
   cmWorkerPool::ProcessResultT result;
   if (this->RunProcess(GenT::UIC, result, cmd, this->Reason.get())) {
     // Uic command success

Source/cmSystemTools.cxx

@@ -970,6 +970,17 @@ cmSystemTools::WindowsVersion cmSystemTools::GetWindowsVersion()
   result.dwBuildNumber = osviex.dwBuildNumber;
   return result;
 }
+
+std::string cmSystemTools::GetComspec()
+{
+  std::string comspec;
+  if (!cmSystemTools::GetEnv("COMSPEC", comspec) ||
+      !cmSystemTools::FileIsFullPath(comspec)) {
+    comspec = "cmd.exe";
+  }
+  return comspec;
+}
+
 #endif
 
 std::string cmSystemTools::GetRealPathResolvingWindowsSubst(

Source/cmSystemTools.h

@@ -585,6 +585,9 @@ public:
     unsigned int dwBuildNumber;
   };
   static WindowsVersion GetWindowsVersion();
+
+  /** Attempt to get full path to COMSPEC, default "cmd.exe" */
+  static std::string GetComspec();
 #endif
 
   /** Get the real path for a given path, removing all symlinks.