1 files changed, 66 insertions, 0 deletions
diff --git a/Common/Reproduce.cpp b/Common/Reproduce.cpp
new file mode 100644
index 0000000000000..7be4ea6bb98b5
--- /dev/null
+++ b/Common/Reproduce.cpp
@@ -0,0 +1,66 @@
+//===- Reproduce.cpp - Utilities for creating reproducers -----------------===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lld/Common/Reproduce.h"
+#include "llvm/Option/Arg.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Path.h"
+
+using namespace lld;
+using namespace llvm;
+using namespace llvm::sys;
+
+// Makes a given pathname an absolute path first, and then remove
+// beginning /. For example, "../foo.o" is converted to "home/john/foo.o",
+// assuming that the current directory is "/home/john/bar".
+// Returned string is a forward slash separated path even on Windows to avoid
+// a mess with backslash-as-escape and backslash-as-path-separator.
+std::string lld::relativeToRoot(StringRef Path) {
+  SmallString<128> Abs = Path;
+  if (fs::make_absolute(Abs))
+    return Path;
+  path::remove_dots(Abs, /*remove_dot_dot=*/true);
+
+  // This is Windows specific. root_name() returns a drive letter
+  // (e.g. "c:") or a UNC name (//net). We want to keep it as part
+  // of the result.
+  SmallString<128> Res;
+  StringRef Root = path::root_name(Abs);
+  if (Root.endswith(":"))
+    Res = Root.drop_back();
+  else if (Root.startswith("//"))
+    Res = Root.substr(2);
+
+  path::append(Res, path::relative_path(Abs));
+  return path::convert_to_slash(Res);
+}
+
+// Quote a given string if it contains a space character.
+std::string lld::quote(StringRef S) {
+  if (S.contains(' '))
+    return ("\"" + S + "\"").str();
+  return S;
+}
+
+std::string lld::rewritePath(StringRef S) {
+  if (fs::exists(S))
+    return relativeToRoot(S);
+  return S;
+}
+
+std::string lld::toString(const opt::Arg &Arg) {
+  std::string K = Arg.getSpelling();
+  if (Arg.getNumValues() == 0)
+    return K;
+  std::string V = quote(Arg.getValue());
+  if (Arg.getOption().getRenderStyle() == opt::Option::RenderJoinedStyle)
+    return K + V;
+  return K + " " + V;
+}