lld/Common/Reproduce.cpp

   1 //===- Reproduce.cpp - Utilities for creating reproducers -----------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "lld/Common/Reproduce.h"
  10 #include "llvm/Option/Arg.h"
  11 #include "llvm/Support/Error.h"
  12 #include "llvm/Support/FileSystem.h"
  13 #include "llvm/Support/Path.h"
  14
  15 using namespace lld;
  16 using namespace llvm;
  17 using namespace llvm::sys;
  18
  19 // Makes a given pathname an absolute path first, and then remove
  20 // beginning /. For example, "../foo.o" is converted to "home/john/foo.o",
  21 // assuming that the current directory is "/home/john/bar".
  22 // Returned string is a forward slash separated path even on Windows to avoid
  23 // a mess with backslash-as-escape and backslash-as-path-separator.
  24 std::string lld::relativeToRoot(StringRef path) {
  25   SmallString<128> abs = path;
  26   if (fs::make_absolute(abs))
  27     return std::string(path);
  28   path::remove_dots(abs, /*remove_dot_dot=*/true);
  29
  30   // This is Windows specific. root_name() returns a drive letter
  31   // (e.g. "c:") or a UNC name (//net). We want to keep it as part
  32   // of the result.
  33   SmallString<128> res;
  34   StringRef root = path::root_name(abs);
  35   if (root.endswith(":"))
  36     res = root.drop_back();
  37   else if (root.startswith("//"))
  38     res = root.substr(2);
  39
  40   path::append(res, path::relative_path(abs));
  41   return path::convert_to_slash(res);
  42 }
  43
  44 // Quote a given string if it contains a space character.
  45 std::string lld::quote(StringRef s) {
  46   if (s.contains(' '))
  47     return ("\"" + s + "\"").str();
  48   return std::string(s);
  49 }
  50
  51 // Converts an Arg to a string representation suitable for a response file.
  52 // To show an Arg in a diagnostic, use Arg::getAsString() instead.
  53 std::string lld::toString(const opt::Arg &arg) {
  54   std::string k = std::string(arg.getSpelling());
  55   if (arg.getNumValues() == 0)
  56     return k;
  57   std::string v;
  58   for (size_t i = 0; i < arg.getNumValues(); ++i) {
  59     if (i > 0)
  60       v.push_back(' ');
  61     v += quote(arg.getValue(i));
  62   }
  63   if (arg.getOption().getRenderStyle() == opt::Option::RenderJoinedStyle)
  64     return k + v;
  65   return k + " " + v;
  66 }