1 files changed, 31 insertions, 1 deletions
diff --git a/lib/Support/Process.cpp b/lib/Support/Process.cpp
index 0380ed9..0d42e0e 100644
--- a/lib/Support/Process.cpp
+++ b/lib/Support/Process.cpp
@@ -7,13 +7,16 @@
 //
 //===----------------------------------------------------------------------===//
 //
-//  This header file implements the operating system Process concept.
+//  This file implements the operating system Process concept.
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/Config/config.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Process.h"
+#include "llvm/Support/Program.h"
 
 using namespace llvm;
 using namespace sys;
@@ -66,6 +69,33 @@ TimeValue self_process::get_wall_time() const {
   return getElapsedWallTime();
 }
 
+Optional<std::string> Process::FindInEnvPath(const std::string& EnvName,
+                                             const std::string& FileName)
+{
+  Optional<std::string> FoundPath;
+  Optional<std::string> OptPath = Process::GetEnv(EnvName);
+  if (!OptPath.hasValue())
+    return FoundPath;
+
+  const char EnvPathSeparatorStr[] = {EnvPathSeparator, '\0'};
+  SmallVector<StringRef, 8> Dirs;
+  SplitString(OptPath.getValue(), Dirs, EnvPathSeparatorStr);
+
+  for (const auto &Dir : Dirs) {
+    if (Dir.empty())
+      continue;
+
+    SmallString<128> FilePath(Dir);
+    path::append(FilePath, FileName);
+    if (fs::exists(Twine(FilePath))) {
+      FoundPath = FilePath.str();
+      break;
+    }
+  }
+
+  return FoundPath;
+}
+
 
 #define COLOR(FGBG, CODE, BOLD) "\033[0;" BOLD FGBG CODE "m"