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llvm-project/clang-tools-extra/clang-include-fixer/tool/ClangIncludeFixer.cpp

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//===-- ClangIncludeFixer.cpp - Standalone include fixer ------------------===//
//
// 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 "FuzzySymbolIndex.h"
#include "InMemorySymbolIndex.h"
#include "IncludeFixer.h"
#include "IncludeFixerContext.h"
#include "SymbolIndexManager.h"
#include "YamlSymbolIndex.h"
#include "clang/Format/Format.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Rewrite/Core/Rewriter.h"
#include "clang/Tooling/CommonOptionsParser.h"
#include "clang/Tooling/Core/Replacement.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/YAMLTraits.h"
using namespace clang;
using namespace llvm;
using clang::include_fixer::IncludeFixerContext;
LLVM_YAML_IS_DOCUMENT_LIST_VECTOR(IncludeFixerContext)
LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(IncludeFixerContext::HeaderInfo)
LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(IncludeFixerContext::QuerySymbolInfo)
namespace llvm {
namespace yaml {
template <> struct MappingTraits<tooling::Range> {
struct NormalizedRange {
NormalizedRange(const IO &) : Offset(0), Length(0) {}
NormalizedRange(const IO &, const tooling::Range &R)
: Offset(R.getOffset()), Length(R.getLength()) {}
tooling::Range denormalize(const IO &) {
return tooling::Range(Offset, Length);
}
unsigned Offset;
unsigned Length;
};
static void mapping(IO &IO, tooling::Range &Info) {
MappingNormalization<NormalizedRange, tooling::Range> Keys(IO, Info);
IO.mapRequired("Offset", Keys->Offset);
IO.mapRequired("Length", Keys->Length);
}
};
template <> struct MappingTraits<IncludeFixerContext::HeaderInfo> {
static void mapping(IO &io, IncludeFixerContext::HeaderInfo &Info) {
io.mapRequired("Header", Info.Header);
io.mapRequired("QualifiedName", Info.QualifiedName);
}
};
template <> struct MappingTraits<IncludeFixerContext::QuerySymbolInfo> {
static void mapping(IO &io, IncludeFixerContext::QuerySymbolInfo &Info) {
io.mapRequired("RawIdentifier", Info.RawIdentifier);
io.mapRequired("Range", Info.Range);
}
};
template <> struct MappingTraits<IncludeFixerContext> {
static void mapping(IO &IO, IncludeFixerContext &Context) {
IO.mapRequired("QuerySymbolInfos", Context.QuerySymbolInfos);
IO.mapRequired("HeaderInfos", Context.HeaderInfos);
IO.mapRequired("FilePath", Context.FilePath);
}
};
} // namespace yaml
} // namespace llvm
namespace {
cl::OptionCategory IncludeFixerCategory("Tool options");
enum DatabaseFormatTy {
fixed, ///< Hard-coded mapping.
yaml, ///< Yaml database created by find-all-symbols.
fuzzyYaml, ///< Yaml database with fuzzy-matched identifiers.
};
cl::opt<DatabaseFormatTy> DatabaseFormat(
"db", cl::desc("Specify input format"),
cl::values(clEnumVal(fixed, "Hard-coded mapping"),
clEnumVal(yaml, "Yaml database created by find-all-symbols"),
clEnumVal(fuzzyYaml, "Yaml database, with fuzzy-matched names")),
cl::init(yaml), cl::cat(IncludeFixerCategory));
cl::opt<std::string> Input("input",
cl::desc("String to initialize the database"),
cl::cat(IncludeFixerCategory));
cl::opt<std::string>
QuerySymbol("query-symbol",
cl::desc("Query a given symbol (e.g. \"a::b::foo\") in\n"
"database directly without parsing the file."),
cl::cat(IncludeFixerCategory));
cl::opt<bool>
MinimizeIncludePaths("minimize-paths",
cl::desc("Whether to minimize added include paths"),
cl::init(true), cl::cat(IncludeFixerCategory));
cl::opt<bool> Quiet("q", cl::desc("Reduce terminal output"), cl::init(false),
cl::cat(IncludeFixerCategory));
cl::opt<bool>
STDINMode("stdin",
cl::desc("Override source file's content (in the overlaying\n"
"virtual file system) with input from <stdin> and run\n"
"the tool on the new content with the compilation\n"
"options of the source file. This mode is currently\n"
"used for editor integration."),
cl::init(false), cl::cat(IncludeFixerCategory));
cl::opt<bool> OutputHeaders(
"output-headers",
cl::desc("Print the symbol being queried and all its relevant headers in\n"
"JSON format to stdout:\n"
" {\n"
" \"FilePath\": \"/path/to/foo.cc\",\n"
" \"QuerySymbolInfos\": [\n"
" {\"RawIdentifier\": \"foo\",\n"
" \"Range\": {\"Offset\": 0, \"Length\": 3}}\n"
" ],\n"
" \"HeaderInfos\": [ {\"Header\": \"\\\"foo_a.h\\\"\",\n"
" \"QualifiedName\": \"a::foo\"} ]\n"
" }"),
cl::init(false), cl::cat(IncludeFixerCategory));
cl::opt<std::string> InsertHeader(
"insert-header",
cl::desc("Insert a specific header. This should run with STDIN mode.\n"
"The result is written to stdout. It is currently used for\n"
"editor integration. Support YAML/JSON format:\n"
" -insert-header=\"{\n"
" FilePath: \"/path/to/foo.cc\",\n"
" QuerySymbolInfos: [\n"
" {RawIdentifier: foo,\n"
" Range: {Offset: 0, Length: 3}}\n"
" ],\n"
" HeaderInfos: [ {Headers: \"\\\"foo_a.h\\\"\",\n"
" QualifiedName: \"a::foo\"} ]}\""),
cl::init(""), cl::cat(IncludeFixerCategory));
cl::opt<std::string>
Style("style",
cl::desc("Fallback style for reformatting after inserting new\n"
"headers if there is no clang-format config file found."),
cl::init("llvm"), cl::cat(IncludeFixerCategory));
std::unique_ptr<include_fixer::SymbolIndexManager>
createSymbolIndexManager(StringRef FilePath) {
using find_all_symbols::SymbolInfo;
auto SymbolIndexMgr = std::make_unique<include_fixer::SymbolIndexManager>();
switch (DatabaseFormat) {
case fixed: {
// Parse input and fill the database with it.
// <symbol>=<header><, header...>
// Multiple symbols can be given, separated by semicolons.
std::map<std::string, std::vector<std::string>> SymbolsMap;
SmallVector<StringRef, 4> SemicolonSplits;
StringRef(Input).split(SemicolonSplits, ";");
std::vector<find_all_symbols::SymbolAndSignals> Symbols;
for (StringRef Pair : SemicolonSplits) {
auto Split = Pair.split('=');
std::vector<std::string> Headers;
SmallVector<StringRef, 4> CommaSplits;
Split.second.split(CommaSplits, ",");
for (size_t I = 0, E = CommaSplits.size(); I != E; ++I)
Symbols.push_back(
{SymbolInfo(Split.first.trim(), SymbolInfo::SymbolKind::Unknown,
CommaSplits[I].trim(), {}),
// Use fake "seen" signal for tests, so first header wins.
SymbolInfo::Signals(/*Seen=*/static_cast<unsigned>(E - I),
/*Used=*/0)});
}
SymbolIndexMgr->addSymbolIndex([=]() {
return std::make_unique<include_fixer::InMemorySymbolIndex>(Symbols);
});
break;
}
case yaml: {
auto CreateYamlIdx = [=]() -> std::unique_ptr<include_fixer::SymbolIndex> {
llvm::ErrorOr<std::unique_ptr<include_fixer::YamlSymbolIndex>> DB(
nullptr);
if (!Input.empty()) {
DB = include_fixer::YamlSymbolIndex::createFromFile(Input);
} else {
// If we don't have any input file, look in the directory of the
// first
// file and its parents.
SmallString<128> AbsolutePath(tooling::getAbsolutePath(FilePath));
StringRef Directory = llvm::sys::path::parent_path(AbsolutePath);
DB = include_fixer::YamlSymbolIndex::createFromDirectory(
Directory, "find_all_symbols_db.yaml");
}
if (!DB) {
llvm::errs() << "Couldn't find YAML db: " << DB.getError().message()
<< '\n';
return nullptr;
}
return std::move(*DB);
};
SymbolIndexMgr->addSymbolIndex(std::move(CreateYamlIdx));
break;
}
case fuzzyYaml: {
// This mode is not very useful, because we don't correct the identifier.
// It's main purpose is to expose FuzzySymbolIndex to tests.
SymbolIndexMgr->addSymbolIndex(
[]() -> std::unique_ptr<include_fixer::SymbolIndex> {
auto DB = include_fixer::FuzzySymbolIndex::createFromYAML(Input);
if (!DB) {
llvm::errs() << "Couldn't load fuzzy YAML db: "
<< llvm::toString(DB.takeError()) << '\n';
return nullptr;
}
return std::move(*DB);
});
break;
}
}
return SymbolIndexMgr;
}
void writeToJson(llvm::raw_ostream &OS, const IncludeFixerContext& Context) {
OS << "{\n"
<< " \"FilePath\": \""
<< llvm::yaml::escape(Context.getFilePath()) << "\",\n"
<< " \"QuerySymbolInfos\": [\n";
for (const auto &Info : Context.getQuerySymbolInfos()) {
OS << " {\"RawIdentifier\": \"" << Info.RawIdentifier << "\",\n";
OS << " \"Range\":{";
OS << "\"Offset\":" << Info.Range.getOffset() << ",";
OS << "\"Length\":" << Info.Range.getLength() << "}}";
if (&Info != &Context.getQuerySymbolInfos().back())
OS << ",\n";
}
OS << "\n ],\n";
OS << " \"HeaderInfos\": [\n";
const auto &HeaderInfos = Context.getHeaderInfos();
for (const auto &Info : HeaderInfos) {
OS << " {\"Header\": \"" << llvm::yaml::escape(Info.Header) << "\",\n"
<< " \"QualifiedName\": \"" << Info.QualifiedName << "\"}";
if (&Info != &HeaderInfos.back())
OS << ",\n";
}
OS << "\n";
OS << " ]\n";
OS << "}\n";
}
int includeFixerMain(int argc, const char **argv) {
auto ExpectedParser =
tooling::CommonOptionsParser::create(argc, argv, IncludeFixerCategory);
if (!ExpectedParser) {
llvm::errs() << ExpectedParser.takeError();
return 1;
}
tooling::CommonOptionsParser &options = ExpectedParser.get();
tooling::ClangTool tool(options.getCompilations(),
options.getSourcePathList());
llvm::StringRef SourceFilePath = options.getSourcePathList().front();
// In STDINMode, we override the file content with the <stdin> input.
// Since `tool.mapVirtualFile` takes `StringRef`, we define `Code` outside of
// the if-block so that `Code` is not released after the if-block.
std::unique_ptr<llvm::MemoryBuffer> Code;
if (STDINMode) {
assert(options.getSourcePathList().size() == 1 &&
"Expect exactly one file path in STDINMode.");
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> CodeOrErr =
MemoryBuffer::getSTDIN();
if (std::error_code EC = CodeOrErr.getError()) {
errs() << EC.message() << "\n";
return 1;
}
Code = std::move(CodeOrErr.get());
if (Code->getBufferSize() == 0)
return 0; // Skip empty files.
tool.mapVirtualFile(SourceFilePath, Code->getBuffer());
}
if (!InsertHeader.empty()) {
if (!STDINMode) {
errs() << "Should be running in STDIN mode\n";
return 1;
}
llvm::yaml::Input yin(InsertHeader);
IncludeFixerContext Context;
yin >> Context;
const auto &HeaderInfos = Context.getHeaderInfos();
assert(!HeaderInfos.empty());
// We only accept one unique header.
// Check all elements in HeaderInfos have the same header.
bool IsUniqueHeader = std::equal(
HeaderInfos.begin()+1, HeaderInfos.end(), HeaderInfos.begin(),
[](const IncludeFixerContext::HeaderInfo &LHS,
const IncludeFixerContext::HeaderInfo &RHS) {
return LHS.Header == RHS.Header;
});
if (!IsUniqueHeader) {
errs() << "Expect exactly one unique header.\n";
return 1;
}
// If a header has multiple symbols, we won't add the missing namespace
// qualifiers because we don't know which one is exactly used.
//
// Check whether all elements in HeaderInfos have the same qualified name.
bool IsUniqueQualifiedName = std::equal(
HeaderInfos.begin() + 1, HeaderInfos.end(), HeaderInfos.begin(),
[](const IncludeFixerContext::HeaderInfo &LHS,
const IncludeFixerContext::HeaderInfo &RHS) {
return LHS.QualifiedName == RHS.QualifiedName;
});
auto InsertStyle = format::getStyle(format::DefaultFormatStyle,
Context.getFilePath(), Style);
if (!InsertStyle) {
llvm::errs() << llvm::toString(InsertStyle.takeError()) << "\n";
return 1;
}
auto Replacements = clang::include_fixer::createIncludeFixerReplacements(
Code->getBuffer(), Context, *InsertStyle,
/*AddQualifiers=*/IsUniqueQualifiedName);
if (!Replacements) {
errs() << "Failed to create replacements: "
<< llvm::toString(Replacements.takeError()) << "\n";
return 1;
}
auto ChangedCode =
tooling::applyAllReplacements(Code->getBuffer(), *Replacements);
if (!ChangedCode) {
llvm::errs() << llvm::toString(ChangedCode.takeError()) << "\n";
return 1;
}
llvm::outs() << *ChangedCode;
return 0;
}
// Set up data source.
std::unique_ptr<include_fixer::SymbolIndexManager> SymbolIndexMgr =
createSymbolIndexManager(SourceFilePath);
if (!SymbolIndexMgr)
return 1;
// Query symbol mode.
if (!QuerySymbol.empty()) {
auto MatchedSymbols = SymbolIndexMgr->search(
QuerySymbol, /*IsNestedSearch=*/true, SourceFilePath);
for (auto &Symbol : MatchedSymbols) {
std::string HeaderPath = Symbol.getFilePath().str();
Symbol.SetFilePath(((HeaderPath[0] == '"' || HeaderPath[0] == '<')
? HeaderPath
: "\"" + HeaderPath + "\""));
}
// We leave an empty symbol range as we don't know the range of the symbol
// being queried in this mode. clang-include-fixer won't add namespace
// qualifiers if the symbol range is empty, which also fits this case.
IncludeFixerContext::QuerySymbolInfo Symbol;
Symbol.RawIdentifier = QuerySymbol;
auto Context =
IncludeFixerContext(SourceFilePath, {Symbol}, MatchedSymbols);
writeToJson(llvm::outs(), Context);
return 0;
}
// Now run our tool.
std::vector<include_fixer::IncludeFixerContext> Contexts;
include_fixer::IncludeFixerActionFactory Factory(*SymbolIndexMgr, Contexts,
Style, MinimizeIncludePaths);
if (tool.run(&Factory) != 0) {
// We suppress all Clang diagnostics (because they would be wrong,
// clang-include-fixer does custom recovery) but still want to give some
// feedback in case there was a compiler error we couldn't recover from.
// The most common case for this is a #include in the file that couldn't be
// found.
llvm::errs() << "Fatal compiler error occurred while parsing file!"
" (incorrect include paths?)\n";
return 1;
}
assert(!Contexts.empty());
if (OutputHeaders) {
// FIXME: Print contexts of all processing files instead of the first one.
writeToJson(llvm::outs(), Contexts.front());
return 0;
}
std::vector<tooling::Replacements> FixerReplacements;
for (const auto &Context : Contexts) {
StringRef FilePath = Context.getFilePath();
auto InsertStyle =
format::getStyle(format::DefaultFormatStyle, FilePath, Style);
if (!InsertStyle) {
llvm::errs() << llvm::toString(InsertStyle.takeError()) << "\n";
return 1;
}
auto Buffer = llvm::MemoryBuffer::getFile(FilePath);
if (!Buffer) {
errs() << "Couldn't open file: " + FilePath.str() + ": "
<< Buffer.getError().message() + "\n";
return 1;
}
auto Replacements = clang::include_fixer::createIncludeFixerReplacements(
Buffer.get()->getBuffer(), Context, *InsertStyle);
if (!Replacements) {
errs() << "Failed to create replacement: "
<< llvm::toString(Replacements.takeError()) << "\n";
return 1;
}
FixerReplacements.push_back(*Replacements);
}
if (!Quiet) {
for (const auto &Context : Contexts) {
if (!Context.getHeaderInfos().empty()) {
llvm::errs() << "Added #include "
<< Context.getHeaderInfos().front().Header << " for "
<< Context.getFilePath() << "\n";
}
}
}
if (STDINMode) {
assert(FixerReplacements.size() == 1);
auto ChangedCode = tooling::applyAllReplacements(Code->getBuffer(),
FixerReplacements.front());
if (!ChangedCode) {
llvm::errs() << llvm::toString(ChangedCode.takeError()) << "\n";
return 1;
}
llvm::outs() << *ChangedCode;
return 0;
}
// Set up a new source manager for applying the resulting replacements.
IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions);
DiagnosticsEngine Diagnostics(new DiagnosticIDs, &*DiagOpts);
TextDiagnosticPrinter DiagnosticPrinter(outs(), &*DiagOpts);
SourceManager SM(Diagnostics, tool.getFiles());
Diagnostics.setClient(&DiagnosticPrinter, false);
// Write replacements to disk.
Rewriter Rewrites(SM, LangOptions());
for (const auto &Replacement : FixerReplacements) {
if (!tooling::applyAllReplacements(Replacement, Rewrites)) {
llvm::errs() << "Failed to apply replacements.\n";
return 1;
}
}
return Rewrites.overwriteChangedFiles();
}
} // namespace
int main(int argc, const char **argv) {
return includeFixerMain(argc, argv);
}
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