[HIPIFY] Scripting related refactoring

+ Move generating hipify-perl and hipify-python into separate namespaces and files
+ Move getAbsoluteFilePath and getAbsoluteDirectoryPath to StringUtils

hipify-clang/src/StringUtils.cpp

@@ -21,6 +21,10 @@ THE SOFTWARE.
 */
 
 #include "StringUtils.h"
+#include "LLVMCompat.h"
+#include "llvm/ADT/SmallString.h"
+
+using namespace llvm;
 
 llvm::StringRef unquoteStr(llvm::StringRef s) {
   if (s.size() > 1 && s.front() == '"' && s.back() == '"') {
@@ -35,3 +39,59 @@ void removePrefixIfPresent(std::string &s, const std::string& prefix) {
   }
   s.erase(0, prefix.size());
 }
+
+std::string getAbsoluteFilePath(const std::string& sFile, std::error_code& EC) {
+  if (sFile.empty()) {
+    return sFile;
+  }
+  if (!sys::fs::exists(sFile)) {
+    llvm::errs() << "\n" << sHipify << sError << "source file: " << sFile << " doesn't exist\n";
+    EC = std::error_code(static_cast<int>(std::errc::no_such_file_or_directory), std::generic_category());
+    return "";
+  }
+  SmallString<256> fileAbsPath;
+  EC = llcompat::real_path(sFile, fileAbsPath, true);
+  if (EC) {
+    llvm::errs() << "\n" << sHipify << sError << EC.message() << ": source file: " << sFile << "\n";
+    return "";
+  }
+  EC = std::error_code();
+  return fileAbsPath.c_str();
+}
+
+std::string getAbsoluteDirectoryPath(const std::string& sDir, std::error_code& EC,
+  const std::string& sDirType, bool bCreateDir) {
+  if (sDir.empty()) {
+    return sDir;
+  }
+  EC = std::error_code();
+  SmallString<256> dirAbsPath;
+  if (sys::fs::exists(sDir)) {
+    if (sys::fs::is_regular_file(sDir)) {
+      llvm::errs() << "\n" << sHipify << sError << sDir << " is not a directory\n";
+      EC = std::error_code(static_cast<int>(std::errc::not_a_directory), std::generic_category());
+      return "";
+    }
+  }
+  else {
+    if (bCreateDir) {
+      EC = sys::fs::create_directory(sDir);
+      if (EC) {
+        llvm::errs() << "\n" << sHipify << sError << EC.message() << ": " << sDirType << " directory: " << sDir << "\n";
+        return "";
+      }
+    }
+    else {
+      llvm::errs() << "\n" << sHipify << sError << sDirType << " directory: " << sDir << " doesn't exist\n";
+      EC = std::error_code(static_cast<int>(std::errc::no_such_file_or_directory), std::generic_category());
+      return "";
+    }
+  }
+  EC = llcompat::real_path(sDir, dirAbsPath, true);
+  if (EC) {
+    llvm::errs() << "\n" << sHipify << sError << EC.message() << ": " << sDirType << " directory: " << sDir << "\n";
+    return "";
+  }
+  return dirAbsPath.c_str();
+}
+