mirror of
https://github.com/MaskRay/ccls.git
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608 lines
20 KiB
C++
608 lines
20 KiB
C++
/* Copyright 2017-2018 ccls Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#include "project.hh"
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#include "clang_tu.hh" // llvm::vfs
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#include "filesystem.hh"
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#include "log.hh"
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#include "pipeline.hh"
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#include "platform.hh"
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#include "utils.hh"
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#include "working_files.hh"
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#include <clang/Driver/Compilation.h>
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#include <clang/Driver/Driver.h>
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#include <clang/Driver/Types.h>
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#include <clang/Frontend/CompilerInstance.h>
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#include <clang/Tooling/CompilationDatabase.h>
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#include <llvm/ADT/STLExtras.h>
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#include <llvm/ADT/StringSet.h>
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#include <llvm/Support/GlobPattern.h>
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#include <llvm/Support/LineIterator.h>
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#include <llvm/Support/Program.h>
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#include <rapidjson/writer.h>
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#ifdef _WIN32
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# include <Windows.h>
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#else
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# include <unistd.h>
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#endif
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#include <array>
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#include <limits.h>
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#include <unordered_set>
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#include <vector>
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using namespace clang;
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using namespace llvm;
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namespace ccls {
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std::pair<LanguageId, bool> lookupExtension(std::string_view filename) {
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using namespace clang::driver;
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auto I = types::lookupTypeForExtension(
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sys::path::extension({filename.data(), filename.size()}).substr(1));
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bool header = I == types::TY_CHeader || I == types::TY_CXXHeader ||
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I == types::TY_ObjCXXHeader;
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bool objc = types::isObjC(I);
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LanguageId ret;
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if (types::isCXX(I))
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ret = objc ? LanguageId::ObjCpp : LanguageId::Cpp;
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else if (objc)
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ret = LanguageId::ObjC;
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else if (I == types::TY_C || I == types::TY_CHeader)
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ret = LanguageId::C;
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else
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ret = LanguageId::Unknown;
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return {ret, header};
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}
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namespace {
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enum OptionClass {
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EqOrJoinOrSep,
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EqOrSep,
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JoinOrSep,
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Separate,
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};
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struct ProjectProcessor {
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Project::Folder &folder;
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std::unordered_set<size_t> command_set;
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StringSet<> exclude_args;
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std::vector<GlobPattern> exclude_globs;
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ProjectProcessor(Project::Folder &folder) : folder(folder) {
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for (auto &arg : g_config->clang.excludeArgs)
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if (arg.find_first_of("?*[") == std::string::npos)
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exclude_args.insert(arg);
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else if (Expected<GlobPattern> glob_or_err = GlobPattern::create(arg))
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exclude_globs.push_back(std::move(*glob_or_err));
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else
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LOG_S(WARNING) << toString(glob_or_err.takeError());
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}
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bool ExcludesArg(StringRef arg) {
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return exclude_args.count(arg) || any_of(exclude_globs,
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[&](const GlobPattern &glob) { return glob.match(arg); });
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}
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// Expand %c %cpp ... in .ccls
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void Process(Project::Entry &entry) {
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std::vector<const char *> args(entry.args.begin(),
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entry.args.begin() + entry.compdb_size);
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auto [lang, header] = lookupExtension(entry.filename);
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for (int i = entry.compdb_size; i < entry.args.size(); i++) {
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const char *arg = entry.args[i];
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StringRef A(arg);
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if (A[0] == '%') {
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bool ok = false;
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for (;;) {
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if (A.consume_front("%c "))
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ok |= lang == LanguageId::C;
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else if (A.consume_front("%h "))
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ok |= lang == LanguageId::C && header;
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else if (A.consume_front("%cpp "))
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ok |= lang == LanguageId::Cpp;
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else if (A.consume_front("%hpp "))
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ok |= lang == LanguageId::Cpp && header;
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else if (A.consume_front("%objective-c "))
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ok |= lang == LanguageId::ObjC;
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else if (A.consume_front("%objective-cpp "))
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ok |= lang == LanguageId::ObjCpp;
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else
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break;
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}
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if (ok)
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args.push_back(A.data());
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} else if (!ExcludesArg(A)) {
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args.push_back(arg);
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}
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}
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entry.args = args;
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GetSearchDirs(entry);
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}
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void GetSearchDirs(Project::Entry &entry) {
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#if LLVM_VERSION_MAJOR < 8
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const std::string base_name = sys::path::filename(entry.filename);
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size_t hash = std::hash<std::string>{}(entry.directory);
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bool OPT_o = false;
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for (auto &arg : entry.args) {
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bool last_o = OPT_o;
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OPT_o = false;
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if (arg[0] == '-') {
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OPT_o = arg[1] == 'o' && arg[2] == '\0';
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if (OPT_o || arg[1] == 'D' || arg[1] == 'W')
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continue;
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} else if (last_o) {
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continue;
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} else if (sys::path::filename(arg) == base_name) {
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LanguageId lang = lookupExtension(arg).first;
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if (lang != LanguageId::Unknown) {
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hash_combine(hash, (size_t)lang);
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continue;
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}
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}
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hash_combine(hash, std::hash<std::string_view>{}(arg));
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}
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if (!command_set.insert(hash).second)
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return;
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auto args = entry.args;
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args.push_back("-fsyntax-only");
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for (const std::string &arg : g_config->clang.extraArgs)
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args.push_back(Intern(arg));
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args.push_back(Intern("-working-directory=" + entry.directory));
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args.push_back(Intern("-resource-dir=" + g_config->clang.resourceDir));
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// a weird C++ deduction guide heap-use-after-free causes libclang to crash.
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IgnoringDiagConsumer DiagC;
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IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions());
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DiagnosticsEngine Diags(
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IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs()), &*DiagOpts,
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&DiagC, false);
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driver::Driver Driver(args[0], llvm::sys::getDefaultTargetTriple(), Diags);
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auto TargetAndMode =
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driver::ToolChain::getTargetAndModeFromProgramName(args[0]);
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if (!TargetAndMode.TargetPrefix.empty()) {
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const char *arr[] = {"-target", TargetAndMode.TargetPrefix.c_str()};
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args.insert(args.begin() + 1, std::begin(arr), std::end(arr));
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Driver.setTargetAndMode(TargetAndMode);
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}
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Driver.setCheckInputsExist(false);
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std::unique_ptr<driver::Compilation> C(Driver.BuildCompilation(args));
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const driver::JobList &Jobs = C->getJobs();
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if (Jobs.size() != 1)
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return;
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const auto &CCArgs = Jobs.begin()->getArguments();
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auto CI = std::make_unique<CompilerInvocation>();
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CompilerInvocation::CreateFromArgs(*CI, CCArgs.data(),
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CCArgs.data() + CCArgs.size(), Diags);
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CI->getFrontendOpts().DisableFree = false;
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CI->getCodeGenOpts().DisableFree = false;
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HeaderSearchOptions &HeaderOpts = CI->getHeaderSearchOpts();
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for (auto &E : HeaderOpts.UserEntries) {
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std::string path =
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NormalizePath(ResolveIfRelative(entry.directory, E.Path));
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EnsureEndsInSlash(path);
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switch (E.Group) {
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default:
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folder.search_dir2kind[path] |= 2;
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break;
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case frontend::Quoted:
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folder.search_dir2kind[path] |= 1;
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break;
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case frontend::Angled:
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folder.search_dir2kind[path] |= 3;
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break;
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}
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}
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#endif
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}
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};
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std::vector<const char *>
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ReadCompilerArgumentsFromFile(const std::string &path) {
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auto MBOrErr = MemoryBuffer::getFile(path);
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if (!MBOrErr)
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return {};
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std::vector<const char *> args;
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for (line_iterator I(*MBOrErr.get(), true, '#'), E; I != E; ++I) {
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std::string line = *I;
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DoPathMapping(line);
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args.push_back(Intern(line));
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}
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return args;
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}
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bool AppendToCDB(const std::vector<const char *> &args) {
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return args.size() && StringRef("%compile_commands.json") == args[0];
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}
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std::vector<const char *> GetFallback(const std::string path) {
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std::vector<const char *> argv{"clang"};
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if (sys::path::extension(path) == ".h")
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argv.push_back("-xobjective-c++-header");
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for (const std::string &arg : g_config->clang.extraArgs)
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argv.push_back(Intern(arg));
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argv.push_back(Intern(path));
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return argv;
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}
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void LoadDirectoryListing(ProjectProcessor &proc, const std::string &root,
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const StringSet<> &Seen) {
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Project::Folder &folder = proc.folder;
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std::vector<std::string> files;
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auto GetDotCcls = [&root, &folder](std::string cur) {
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while (!(cur = sys::path::parent_path(cur)).empty()) {
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auto it = folder.dot_ccls.find(cur);
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if (it != folder.dot_ccls.end())
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return it->second;
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std::string normalized = NormalizePath(cur);
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// Break if outside of the project root.
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if (normalized.size() <= root.size() ||
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normalized.compare(0, root.size(), root) != 0)
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break;
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}
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return folder.dot_ccls[root];
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};
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GetFilesInFolder(root, true /*recursive*/, true /*add_folder_to_path*/,
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[&folder, &files, &Seen](const std::string &path) {
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std::pair<LanguageId, bool> lang = lookupExtension(path);
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if (lang.first != LanguageId::Unknown && !lang.second) {
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if (!Seen.count(path))
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files.push_back(path);
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} else if (sys::path::filename(path) == ".ccls") {
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std::vector<const char *> args = ReadCompilerArgumentsFromFile(path);
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folder.dot_ccls.emplace(sys::path::parent_path(path),
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args);
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std::string l;
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for (size_t i = 0; i < args.size(); i++) {
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if (i)
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l += ' ';
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l += args[i];
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}
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LOG_S(INFO) << "use " << path << ": " << l;
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}
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});
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// If the first line of .ccls is %compile_commands.json, append extra flags.
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for (auto &e : folder.entries)
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if (const auto &args = GetDotCcls(e.filename); AppendToCDB(args)) {
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if (args.size())
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e.args.insert(e.args.end(), args.begin() + 1, args.end());
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proc.Process(e);
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}
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// Set flags for files not in compile_commands.json
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for (const std::string &file : files)
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if (const auto &args = GetDotCcls(file); !AppendToCDB(args)) {
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Project::Entry e;
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e.root = e.directory = root;
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e.filename = file;
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if (args.empty()) {
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e.args = GetFallback(e.filename);
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} else {
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e.args = args;
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e.args.push_back(Intern(e.filename));
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}
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proc.Process(e);
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folder.entries.push_back(e);
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}
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}
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// Computes a score based on how well |a| and |b| match. This is used for
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// argument guessing.
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int ComputeGuessScore(std::string_view a, std::string_view b) {
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// Increase score based on common prefix and suffix. Prefixes are prioritized.
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if (a.size() > b.size())
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std::swap(a, b);
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size_t i = std::mismatch(a.begin(), a.end(), b.begin()).first - a.begin();
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size_t j = std::mismatch(a.rbegin(), a.rend(), b.rbegin()).first - a.rbegin();
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int score = 10 * i + j;
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if (i + j < a.size())
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score -= 100 * (std::count(a.begin() + i, a.end() - j, '/') +
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std::count(b.begin() + i, b.end() - j, '/'));
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return score;
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}
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} // namespace
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void Project::LoadDirectory(const std::string &root, Project::Folder &folder) {
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SmallString<256> CDBDir, Path, StdinPath;
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std::string err_msg;
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folder.entries.clear();
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if (g_config->compilationDatabaseCommand.empty()) {
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CDBDir = root;
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if (g_config->compilationDatabaseDirectory.size())
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sys::path::append(CDBDir, g_config->compilationDatabaseDirectory);
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sys::path::append(Path, CDBDir, "compile_commands.json");
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} else {
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// If `compilationDatabaseCommand` is specified, execute it to get the
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// compdb.
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#ifdef _WIN32
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char tmpdir[L_tmpnam];
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tmpnam_s(tmpdir, L_tmpnam);
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CDBDir = tmpdir;
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if (sys::fs::create_directory(tmpdir, false))
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return;
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#else
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char tmpdir[] = "/tmp/ccls-compdb-XXXXXX";
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if (!mkdtemp(tmpdir))
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return;
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CDBDir = tmpdir;
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#endif
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sys::path::append(Path, CDBDir, "compile_commands.json");
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sys::path::append(StdinPath, CDBDir, "stdin");
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{
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rapidjson::StringBuffer sb;
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rapidjson::Writer<rapidjson::StringBuffer> writer(sb);
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JsonWriter json_writer(&writer);
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Reflect(json_writer, *g_config);
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std::string input = sb.GetString();
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FILE *fout = fopen(StdinPath.c_str(), "wb");
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fwrite(input.c_str(), input.size(), 1, fout);
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fclose(fout);
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}
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std::array<Optional<StringRef>, 3> Redir{StringRef(StdinPath),
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StringRef(Path), StringRef()};
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std::vector<StringRef> args{g_config->compilationDatabaseCommand, root};
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if (sys::ExecuteAndWait(args[0], args, llvm::None, Redir, 0, 0, &err_msg) <
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0) {
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LOG_S(ERROR) << "failed to execute " << args[0].str() << " "
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<< args[1].str() << ": " << err_msg;
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return;
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}
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}
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std::unique_ptr<tooling::CompilationDatabase> CDB =
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tooling::CompilationDatabase::loadFromDirectory(CDBDir, err_msg);
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if (!g_config->compilationDatabaseCommand.empty()) {
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#ifdef _WIN32
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DeleteFileA(StdinPath.c_str());
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DeleteFileA(Path.c_str());
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RemoveDirectoryA(CDBDir.c_str());
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#else
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unlink(StdinPath.c_str());
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unlink(Path.c_str());
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rmdir(CDBDir.c_str());
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#endif
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}
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ProjectProcessor proc(folder);
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StringSet<> Seen;
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std::vector<Project::Entry> result;
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if (!CDB) {
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if (g_config->compilationDatabaseCommand.size() || sys::fs::exists(Path))
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LOG_S(ERROR) << "failed to load " << Path.c_str();
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} else {
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LOG_S(INFO) << "loaded " << Path.c_str();
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for (tooling::CompileCommand &Cmd : CDB->getAllCompileCommands()) {
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static bool once;
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Project::Entry entry;
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entry.root = root;
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DoPathMapping(entry.root);
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entry.directory = NormalizePath(Cmd.Directory);
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DoPathMapping(entry.directory);
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entry.filename =
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NormalizePath(ResolveIfRelative(entry.directory, Cmd.Filename));
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DoPathMapping(entry.filename);
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std::vector<std::string> args = std::move(Cmd.CommandLine);
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entry.args.reserve(args.size());
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for (std::string &arg : args) {
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DoPathMapping(arg);
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if (!proc.ExcludesArg(arg))
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entry.args.push_back(Intern(arg));
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}
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entry.compdb_size = entry.args.size();
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// Work around relative --sysroot= as it isn't affected by
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// -working-directory=. chdir is thread hostile but this function runs
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// before indexers do actual work and it works when there is only one
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// workspace folder.
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if (!once) {
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once = true;
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llvm::vfs::getRealFileSystem()->setCurrentWorkingDirectory(
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entry.directory);
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}
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proc.GetSearchDirs(entry);
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if (Seen.insert(entry.filename).second)
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folder.entries.push_back(entry);
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}
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}
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// Use directory listing if .ccls exists or compile_commands.json does not
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// exist.
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Path.clear();
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sys::path::append(Path, root, ".ccls");
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if (sys::fs::exists(Path))
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LoadDirectoryListing(proc, root, Seen);
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std::vector<const char *> extra_args;
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for (const std::string &arg : g_config->clang.extraArgs)
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extra_args.push_back(Intern(arg));
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for (auto &e : folder.entries) {
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e.args.insert(e.args.end(), extra_args.begin(), extra_args.end());
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e.args.push_back(Intern("-working-directory=" + e.directory));
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}
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}
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void Project::Load(const std::string &root) {
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assert(root.back() == '/');
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std::lock_guard lock(mtx);
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Folder &folder = root2folder[root];
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LoadDirectory(root, folder);
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for (auto &[path, kind] : folder.search_dir2kind)
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LOG_S(INFO) << "search directory: " << path << ' ' << " \"< "[kind];
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// Setup project entries.
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folder.path2entry_index.reserve(folder.entries.size());
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for (size_t i = 0; i < folder.entries.size(); ++i) {
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folder.entries[i].id = i;
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folder.path2entry_index[folder.entries[i].filename] = i;
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}
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}
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Project::Entry Project::FindEntry(const std::string &path, bool can_redirect,
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bool must_exist) {
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Project::Folder *best_folder = nullptr;
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const Entry *best = nullptr;
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std::lock_guard lock(mtx);
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for (auto &[root, folder] : root2folder) {
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// The entry may have different filename but it doesn't matter when building
|
|
// CompilerInvocation. The main filename is specified separately.
|
|
auto it = folder.path2entry_index.find(path);
|
|
if (it != folder.path2entry_index.end()) {
|
|
Project::Entry &entry = folder.entries[it->second];
|
|
if (can_redirect || entry.filename == path)
|
|
return entry;
|
|
if (entry.compdb_size) {
|
|
best_folder = &folder;
|
|
best = &entry;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
bool exists = false;
|
|
std::string dir;
|
|
const std::vector<const char *> *extra = nullptr;
|
|
Project::Entry ret;
|
|
for (auto &[root, folder] : root2folder)
|
|
if (StringRef(path).startswith(root))
|
|
for (auto &[dir1, args] : folder.dot_ccls)
|
|
if (StringRef(path).startswith(dir1)) {
|
|
dir = dir1;
|
|
extra = &args;
|
|
if (AppendToCDB(args))
|
|
goto out;
|
|
exists = true;
|
|
|
|
ret.root = ret.directory = root;
|
|
ret.filename = path;
|
|
if (args.empty()) {
|
|
ret.args = GetFallback(path);
|
|
} else {
|
|
ret.args = args;
|
|
ret.args.push_back(Intern(path));
|
|
}
|
|
ProjectProcessor(folder).Process(ret);
|
|
for (const std::string &arg : g_config->clang.extraArgs)
|
|
ret.args.push_back(Intern(arg));
|
|
ret.args.push_back(Intern("-working-directory=" + ret.directory));
|
|
return ret;
|
|
}
|
|
out:
|
|
if (must_exist && !exists)
|
|
return ret;
|
|
|
|
if (!best) {
|
|
int best_score = INT_MIN;
|
|
for (auto &[root, folder] : root2folder) {
|
|
if (dir.size() && !StringRef(path).startswith(dir))
|
|
continue;
|
|
for (const Entry &e : folder.entries)
|
|
if (e.compdb_size) {
|
|
int score = ComputeGuessScore(path, e.filename);
|
|
if (score > best_score) {
|
|
best_score = score;
|
|
best = &e;
|
|
best_folder = &folder;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
ret.is_inferred = true;
|
|
ret.filename = path;
|
|
if (!best) {
|
|
if (ret.root.empty())
|
|
ret.root = g_config->fallbackFolder;
|
|
ret.directory = ret.root;
|
|
ret.args = GetFallback(path);
|
|
} else {
|
|
ret.root = best->root;
|
|
ret.directory = best->directory;
|
|
ret.args = best->args;
|
|
ret.args.resize(best->compdb_size);
|
|
if (extra && extra->size())
|
|
ret.args.insert(ret.args.end(), extra->begin() + 1, extra->end());
|
|
ProjectProcessor(*best_folder).Process(ret);
|
|
for (const std::string &arg : g_config->clang.extraArgs)
|
|
ret.args.push_back(Intern(arg));
|
|
ret.args.push_back(Intern("-working-directory=" + ret.directory));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void Project::Index(WorkingFiles *wfiles, RequestId id) {
|
|
auto &gi = g_config->index;
|
|
GroupMatch match(gi.whitelist, gi.blacklist),
|
|
match_i(gi.initialWhitelist, gi.initialBlacklist);
|
|
{
|
|
std::lock_guard lock(mtx);
|
|
for (auto &[root, folder] : root2folder) {
|
|
int i = 0;
|
|
for (const Project::Entry &entry : folder.entries) {
|
|
std::string reason;
|
|
if (match.Matches(entry.filename, &reason) &&
|
|
match_i.Matches(entry.filename, &reason)) {
|
|
bool interactive = wfiles->GetFile(entry.filename) != nullptr;
|
|
pipeline::Index(entry.filename, entry.args,
|
|
interactive ? IndexMode::Normal
|
|
: IndexMode::NonInteractive,
|
|
false, id);
|
|
} else {
|
|
LOG_V(1) << "[" << i << "/" << folder.entries.size() << "]: " << reason
|
|
<< "; skip " << entry.filename;
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
}
|
|
|
|
pipeline::loaded_ts = pipeline::tick;
|
|
// Dummy request to indicate that project is loaded and
|
|
// trigger refreshing semantic highlight for all working files.
|
|
pipeline::Index("", {}, IndexMode::NonInteractive, false);
|
|
}
|
|
|
|
void Project::IndexRelated(const std::string &path) {
|
|
auto &gi = g_config->index;
|
|
GroupMatch match(gi.whitelist, gi.blacklist);
|
|
std::string stem = sys::path::stem(path);
|
|
std::lock_guard lock(mtx);
|
|
for (auto &[root, folder] : root2folder)
|
|
if (StringRef(path).startswith(root)) {
|
|
for (const Project::Entry &entry : folder.entries) {
|
|
std::string reason;
|
|
if (sys::path::stem(entry.filename) == stem && entry.filename != path &&
|
|
match.Matches(entry.filename, &reason))
|
|
pipeline::Index(entry.filename, entry.args, IndexMode::NonInteractive,
|
|
true);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
} // namespace ccls
|