refactor: cmake help can use OS defaults

Author: alandefreitas

src/lib/Lib/CMakeExecution.cpp

@@ -74,8 +74,19 @@ executeCmakeHelp(llvm::StringRef cmakePath)
 Expected<std::string>
 getCmakeDefaultGenerator(llvm::StringRef cmakePath) 
 {
-    MRDOCS_TRY(auto const cmakeHelp, executeCmakeHelp(cmakePath));
+    Expected<std::string> const cmakeHelpExp = executeCmakeHelp(cmakePath);
+    if (!cmakeHelpExp) {
+        if (llvm::sys::path::extension(cmakePath) == ".exe")
+        {
+            return "Visual Studio 17 2022";
+        }
+        else
+        {
+            return "Unix Makefiles";
+        }
+    }
 
+    std::string const cmakeHelp = *std::move(cmakeHelpExp);
     std::istringstream stream(cmakeHelp);
     std::string line;
     std::string defaultGenerator;

src/tool/GenerateAction.cpp

@@ -179,12 +179,6 @@ DoGenerateAction()
         compileCommands, config,
         defaultIncludePaths);
 
-    // Normalize outputPath path
-    MRDOCS_CHECK(toolArgs.outputPath, "The output path argument is missing");
-    toolArgs.outputPath = files::normalizePath(
-        files::makeAbsolute(toolArgs.outputPath,
-            (*config)->workingDir));
-
     // --------------------------------------------------------------
     //
     // Build corpus
@@ -206,6 +200,12 @@ DoGenerateAction()
     // Generate docs
     //
     // --------------------------------------------------------------
+    // Normalize outputPath path
+    MRDOCS_CHECK(toolArgs.outputPath, "The output path argument is missing");
+    toolArgs.outputPath = files::normalizePath(
+        files::makeAbsolute(
+            toolArgs.outputPath,
+            (*config)->workingDir));
     report::info("Generating docs\n");
     MRDOCS_TRY(generator.build(toolArgs.outputPath.getValue(), *corpus));
     return {};