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 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 S;
49 }
50 
51 std::string lld::toString(const opt::Arg &Arg) {
52   std::string K = Arg.getSpelling();
53   if (Arg.getNumValues() == 0)
54     return K;
55   std::string V = quote(Arg.getValue());
56   if (Arg.getOption().getRenderStyle() == opt::Option::RenderJoinedStyle)
57     return K + V;
58   return K + " " + V;
59 }
60