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
15using namespace lld;
16using namespace llvm;
17using 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.
24std::string lld::relativeToRoot(StringRef path) {
25  SmallString<128> abs = path;
26  if (fs::make_absolute(abs))
27    return 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.
45std::string lld::quote(StringRef s) {
46  if (s.contains(' '))
47    return ("\"" + s + "\"").str();
48  return 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.
53std::string lld::toString(const opt::Arg &arg) {
54  std::string k = arg.getSpelling();
55  if (arg.getNumValues() == 0)
56    return k;
57  std::string v = quote(arg.getValue());
58  if (arg.getOption().getRenderStyle() == opt::Option::RenderJoinedStyle)
59    return k + v;
60  return k + " " + v;
61}
62