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//===-- TestFS.cpp ----------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "TestFS.h"
#include "GlobalCompilationDatabase.h"
#include "URI.h"
#include "support/Logger.h"
#include "support/Path.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Path.h"
#include <optional>
namespace clang {
namespace clangd {
namespace {
// Tries to strip \p Prefix from beginning of \p Path. Returns true on success.
// If \p Prefix doesn't match, leaves \p Path untouched and returns false.
bool pathConsumeFront(PathRef &Path, PathRef Prefix) {
if (!pathStartsWith(Prefix, Path))
return false;
Path = Path.drop_front(Prefix.size());
return true;
}
} // namespace
llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>
buildTestFS(llvm::StringMap<std::string> const &Files,
llvm::StringMap<time_t> const &Timestamps) {
llvm::IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> MemFS(
new llvm::vfs::InMemoryFileSystem);
MemFS->setCurrentWorkingDirectory(testRoot());
for (auto &FileAndContents : Files) {
llvm::StringRef File = FileAndContents.first();
MemFS->addFile(
File, Timestamps.lookup(File),
llvm::MemoryBuffer::getMemBufferCopy(FileAndContents.second, File));
}
return MemFS;
}
MockCompilationDatabase::MockCompilationDatabase(llvm::StringRef Directory,
llvm::StringRef RelPathPrefix)
: ExtraClangFlags({"-ffreestanding"}), Directory(Directory),
RelPathPrefix(RelPathPrefix) {
// -ffreestanding avoids implicit stdc-predef.h.
}
std::optional<ProjectInfo>
MockCompilationDatabase::getProjectInfo(PathRef File) const {
return ProjectInfo{std::string(Directory)};
}
std::optional<tooling::CompileCommand>
MockCompilationDatabase::getCompileCommand(PathRef File) const {
if (ExtraClangFlags.empty())
return std::nullopt;
auto FileName = llvm::sys::path::filename(File);
// Build the compile command.
auto CommandLine = ExtraClangFlags;
CommandLine.insert(CommandLine.begin(), "clang");
if (RelPathPrefix.empty()) {
// Use the absolute path in the compile command.
CommandLine.push_back(std::string(File));
} else {
// Build a relative path using RelPathPrefix.
llvm::SmallString<32> RelativeFilePath(RelPathPrefix);
llvm::sys::path::append(RelativeFilePath, FileName);
CommandLine.push_back(std::string(RelativeFilePath.str()));
}
return {tooling::CompileCommand(Directory != llvm::StringRef()
? Directory
: llvm::sys::path::parent_path(File),
FileName, std::move(CommandLine), "")};
}
const char *testRoot() {
#ifdef _WIN32
return "C:\\clangd-test";
#else
return "/clangd-test";
#endif
}
std::string testPath(PathRef File, llvm::sys::path::Style Style) {
assert(llvm::sys::path::is_relative(File) && "FileName should be relative");
llvm::SmallString<32> NativeFile = File;
llvm::sys::path::native(NativeFile, Style);
llvm::SmallString<32> Path;
llvm::sys::path::append(Path, Style, testRoot(), NativeFile);
return std::string(Path.str());
}
/// unittest: is a scheme that refers to files relative to testRoot().
/// URI body is a path relative to testRoot() e.g. unittest:///x.h for
/// /clangd-test/x.h.
class TestScheme : public URIScheme {
public:
static const char *Scheme;
llvm::Expected<std::string>
getAbsolutePath(llvm::StringRef /*Authority*/, llvm::StringRef Body,
llvm::StringRef HintPath) const override {
if (!HintPath.empty() && !pathStartsWith(testRoot(), HintPath))
return error("Hint path is not empty and doesn't start with {0}: {1}",
testRoot(), HintPath);
if (!Body.consume_front("/"))
return error("Body of an unittest: URI must start with '/'");
llvm::SmallString<16> Path(Body.begin(), Body.end());
llvm::sys::path::native(Path);
return testPath(Path);
}
llvm::Expected<URI>
uriFromAbsolutePath(llvm::StringRef AbsolutePath) const override {
if (!pathConsumeFront(AbsolutePath, testRoot()))
return error("{0} does not start with {1}", AbsolutePath, testRoot());
return URI(Scheme, /*Authority=*/"",
llvm::sys::path::convert_to_slash(AbsolutePath));
}
};
const char *TestScheme::Scheme = "unittest";
static URISchemeRegistry::Add<TestScheme> X(TestScheme::Scheme, "Test schema");
volatile int UnittestSchemeAnchorSource = 0;
} // namespace clangd
} // namespace clang
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