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(path&: abs))
27 return std::string(path);
28 path::remove_dots(path&: 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(path: abs);
35 if (root.ends_with(Suffix: ":"))
36 res = root.drop_back();
37 else if (root.starts_with(Prefix: "//"))
38 res = root.substr(Start: 2);
39
40 path::append(path&: res, a: path::relative_path(path: abs));
41 return path::convert_to_slash(path: res);
42}
43
44// Quote a given string if it contains a space character.
45std::string lld::quote(StringRef s) {
46 if (s.contains(C: ' '))
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.
53std::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(c: ' ');
61 v += quote(s: arg.getValue(N: i));
62 }
63 if (arg.getOption().getRenderStyle() == opt::Option::RenderJoinedStyle)
64 return k + v;
65 return k + " " + v;
66}
67