Merge remote-tracking branch 'upstream/master'

.appveyor.yml

@@ -15,7 +15,7 @@ install:
   - 7z x llvm.tar
   - git submodule update --init --recursive
 build_script:
-  - cmake -G"Visual Studio 15 2017 Win64" -H. -Bbuild -DCMAKE_BUILD_TYPE=Release -DSYSTEM_CLANG=ON -DCLANG_ROOT=C:\projects\ccls\llvm+clang-7.0.0-win64-msvc-release
+  - cmake -G"Visual Studio 15 2017 Win64" -H. -Bbuild -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=C:\projects\ccls\llvm+clang-7.0.0-win64-msvc-release
   - cmake --build build --target ccls --config Release
 
 artifacts:

CMakeLists.txt

@@ -5,13 +5,7 @@ list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/)
 include(DefaultCMakeBuildType)
 
 # Required Clang version
-set(CLANG_DOWNLOAD_LOCATION ${CMAKE_BINARY_DIR}
-    CACHE STRING "Downloaded Clang location")
-option(SYSTEM_CLANG "Use system installation of Clang instead of \
-       downloading Clang" OFF)
-option(ASAN "Compile with address sanitizers" OFF)
 option(LLVM_ENABLE_RTTI "-fno-rtti if OFF. This should match LLVM libraries" OFF)
-option(CLANG_USE_BUNDLED_LIBC++ "Let Clang use bundled libc++" OFF)
 option(USE_SHARED_LLVM "Link against libLLVM.so instead separate LLVM{Option,Support,...}" OFF)
 
 # Sources for the executable are specified at end of CMakeLists.txt
@@ -30,10 +24,7 @@ add_executable(ccls "")
 # Enable C++17 (Required)
 set_property(TARGET ccls PROPERTY CXX_STANDARD 17)
 set_property(TARGET ccls PROPERTY CXX_STANDARD_REQUIRED ON)
-# Disable gnu extensions except for Cygwin which needs them to build properly
-if(NOT CYGWIN)
 set_property(TARGET ccls PROPERTY CXX_EXTENSIONS OFF)
-endif()
 
 if(NOT LLVM_ENABLE_RTTI)
   # releases.llvm.org libraries are compiled with -fno-rtti
@@ -76,43 +67,12 @@ else()
     target_compile_options(ccls PRIVATE
                            $<$<CONFIG:Debug>:-fno-limit-debug-info>)
   endif()
-
-  if(ASAN)
-    target_compile_options(ccls PRIVATE -fsanitize=address,undefined)
-    # target_link_libraries also takes linker flags
-    target_link_libraries(ccls PRIVATE -fsanitize=address,undefined)
-  endif()
-endif()
-
-### Download Clang if required
-
-if(NOT SYSTEM_CLANG)
-  message(STATUS "Using downloaded Clang")
-
-  include(DownloadAndExtractClang)
-  download_and_extract_clang(${CLANG_DOWNLOAD_LOCATION})
-  # Used by FindClang
-  set(CLANG_ROOT ${DOWNLOADED_CLANG_DIR})
-
-  if(${CMAKE_CXX_COMPILER_ID} STREQUAL Clang AND CLANG_USE_BUNDLED_LIBC++)
-    message(STATUS "Using bundled libc++")
-    target_compile_options(ccls PRIVATE -nostdinc++ -cxx-isystem ${CLANG_ROOT}/include/c++/v1)
-    if(${CMAKE_SYSTEM_NAME} STREQUAL Linux)
-      # Don't use -stdlib=libc++ because while ccls is linked with libc++, bundled clang+llvm require libstdc++
-      target_link_libraries(ccls PRIVATE -L${CLANG_ROOT}/lib c++ c++abi)
-
-      # FreeBSD defaults to -stdlib=libc++ and uses system libcxxrt.a
-    endif()
-  endif()
-
-else()
-  message(STATUS "Using system Clang")
 endif()
 
 ### Libraries
 
 # See cmake/FindClang.cmake
-find_package(Clang 6.0.0)
+find_package(Clang 7.0.0)
 target_link_libraries(ccls PRIVATE Clang::Clang)
 
 # Enable threading support
@@ -143,31 +103,6 @@ target_include_directories(ccls SYSTEM PRIVATE
 
 install(TARGETS ccls RUNTIME DESTINATION bin)
 
-if(NOT SYSTEM_CLANG AND NOT ${CMAKE_SYSTEM_NAME} STREQUAL Windows)
-
-  if(${CMAKE_SYSTEM_NAME} MATCHES Linux|FreeBSD)
-    set_property(TARGET ccls APPEND PROPERTY
-                 INSTALL_RPATH $ORIGIN/../lib)
-  elseif(${CMAKE_SYSTEM_NAME} STREQUAL Darwin)
-    set_property(TARGET ccls APPEND PROPERTY
-                 INSTALL_RPATH @loader_path/../lib)
-  endif()
-
-  file(GLOB LIBCLANG_PLUS_SYMLINKS
-       ${DOWNLOADED_CLANG_DIR}/lib/libclang.[so,dylib]*)
-  install(FILES ${LIBCLANG_PLUS_SYMLINKS} DESTINATION lib)
-endif()
-
-# Allow running from build Windows by copying libclang.dll to build directory
-if(NOT SYSTEM_CLANG AND ${CMAKE_SYSTEM_NAME} STREQUAL Windows)
-  add_custom_command(TARGET ccls
-                     POST_BUILD
-                     COMMAND ${CMAKE_COMMAND} -E copy
-                     ${DOWNLOADED_CLANG_DIR}/bin/libclang.dll
-                     $<TARGET_FILE_DIR:ccls>
-                     COMMENT "Copying libclang.dll to build directory ...")
-endif()
-
 ### Tools
 
 # We use glob here since source files are already manually added with

clang_archive_hashes/LLVM-7.0.0-win64.exe.SHA256

@@ -1 +0,0 @@
-74b197a3959b0408adf0824be01db8dddfa2f9a967f4085af3fad900ed5fdbf6

clang_archive_hashes/clang+llvm-7.0.0-amd64-unknown-freebsd11.tar.xz.SHA256

@@ -1 +0,0 @@
-95ceb933ccf76e3ddaa536f41ab82c442bbac07cdea6f9fbf6e3b13cc1711255

clang_archive_hashes/clang+llvm-7.0.0-x86_64-apple-darwin.tar.xz.SHA256

@@ -1 +0,0 @@
-b3ad93c3d69dfd528df9c5bb1a434367babb8f3baea47fbb99bf49f1b03c94ca

clang_archive_hashes/clang+llvm-7.0.0-x86_64-linux-gnu-ubuntu-14.04.tar.xz.SHA256

@@ -1 +0,0 @@
-5c90e61b06d37270bc26edb305d7e498e2c7be22d99e0afd9f2274ef5458575a

clang_archive_hashes/clang+llvm-7.0.0-x86_64-linux-gnu-ubuntu-16.04.tar.xz.SHA256

@@ -1 +0,0 @@
-69b85c833cd28ea04ce34002464f10a6ad9656dd2bba0f7133536a9927c660d2

cmake/DownloadAndExtract7zip.cmake

@@ -1,52 +0,0 @@
-# Downloads and extracts the 7-Zip MSI installer from https://www.7-zip.org/. 
-# 
-# Returns the extracted 7-Zip directory in DOWNLOADED_7ZIP_DIR
-function(download_and_extract_7zip 7ZIP_DOWNLOAD_LOCATION)
-
-set(7ZIP_VERSION 1801)
-set(7ZIP_EXT .msi)
-set(7ZIP_NAME 7z${7ZIP_VERSION}-x64)
-set(7ZIP_FULL_NAME ${7ZIP_NAME}${7ZIP_EXT})
-
-set(7ZIP_FILE ${7ZIP_DOWNLOAD_LOCATION}/${7ZIP_FULL_NAME})
-set(7ZIP_EXTRACT_DIR ${7ZIP_DOWNLOAD_LOCATION}/${7ZIP_NAME})
-set(7ZIP_URL https://www.7-zip.org/a/${7ZIP_FULL_NAME})
-
-# Exit if 7-Zip is already downloaded and extracted
-find_program(7ZIP_EXECUTABLE 7z NO_DEFAULT_PATH
-             PATHS ${7ZIP_EXTRACT_DIR}/Files/7-Zip)
-if(7ZIP_EXECUTABLE)
-  message(STATUS "7-Zip already downloaded")
-  return()
-endif()
-
-message(STATUS "Downloading 7-Zip ${7ZIP_VERSION} (${7ZIP_URL}) ...")
-file(DOWNLOAD ${7ZIP_URL} ${7ZIP_FILE})
-
-find_program(MSIEXEC_EXECUTABLE msiexec)
-if(NOT MSIEXEC_EXECUTABLE)
-  message(FATAL_ERROR "Unable to find msiexec (required to extract 7-Zip msi \
-installer). Install 7-Zip yourself and make sure it is available in the path")    
-endif()
-
-message(STATUS "Extracting downloaded 7-Zip ...")
-
-# msiexec requires Windows path separators (\)
-file(TO_NATIVE_PATH ${7ZIP_FILE} 7ZIP_FILE)
-file(TO_NATIVE_PATH ${7ZIP_EXTRACT_DIR} 7ZIP_EXTRACT_DIR) 
-
-# msiexec with /a option allows extraction of msi installers without requiring
-# admin privileges. We use this to extract the 7-Zip installer without
-# requiring any actions from the user
-execute_process(COMMAND ${MSIEXEC_EXECUTABLE} /a ${7ZIP_FILE} /qn
-                        TARGETDIR=${7ZIP_EXTRACT_DIR}
-                WORKING_DIRECTORY ${7ZIP_DOWNLOAD_LOCATION}
-                OUTPUT_QUIET)     
-
-# Convert back to CMake separators (/) before returning
-file(TO_CMAKE_PATH ${7ZIP_EXTRACT_DIR} 7ZIP_EXTRACT_DIR)
-
-# Actual 7-Zip directory is nested inside the extract directory.
-set(DOWNLOADED_7ZIP_DIR ${7ZIP_EXTRACT_DIR}/Files/7-Zip PARENT_SCOPE)
-
-endfunction()

cmake/DownloadAndExtractClang.cmake

@@ -1,129 +0,0 @@
-# Downloads and extracts the Clang archive for the current system from
-# https://releases.llvm.org
-#
-# Returns the extracted Clang archive directory in DOWNLOADED_CLANG_DIR
-#
-# Downloads 7-Zip to extract Clang if it isn't available in the PATH
-function(download_and_extract_clang CLANG_DOWNLOAD_LOCATION)
-
-set(CLANG_VERSION 7.0.0)
-set(CLANG_ARCHIVE_EXT .tar.xz)
-
-if(${CMAKE_SYSTEM_NAME} STREQUAL Linux)
-
-  # Default to Ubuntu 16.04
-  set(CLANG_ARCHIVE_NAME
-      clang+llvm-${CLANG_VERSION}-x86_64-linux-gnu-ubuntu-16.04)
-
-elseif(${CMAKE_SYSTEM_NAME} STREQUAL Darwin)
-
-  set(CLANG_ARCHIVE_NAME clang+llvm-${CLANG_VERSION}-x86_64-apple-darwin)
-
-elseif(${CMAKE_SYSTEM_NAME} STREQUAL Windows)
-
-  set(CLANG_ARCHIVE_NAME LLVM-${CLANG_VERSION}-win64)
-  set(CLANG_ARCHIVE_EXT .exe)
-
-elseif(${CMAKE_SYSTEM_NAME} STREQUAL FreeBSD)
-
-  set(CLANG_ARCHIVE_NAME clang+llvm-${CLANG_VERSION}-amd64-unknown-freebsd11)
-
-endif()
-
-set(CLANG_ARCHIVE_FULL_NAME ${CLANG_ARCHIVE_NAME}${CLANG_ARCHIVE_EXT})
-set(CLANG_ARCHIVE_FILE ${CLANG_DOWNLOAD_LOCATION}/${CLANG_ARCHIVE_FULL_NAME})
-set(CLANG_ARCHIVE_EXTRACT_DIR ${CLANG_DOWNLOAD_LOCATION}/${CLANG_ARCHIVE_NAME})
-set(CLANG_ARCHIVE_URL
-    https://releases.llvm.org/${CLANG_VERSION}/${CLANG_ARCHIVE_FULL_NAME})
-set(CLANG_ARCHIVE_HASH_FILE
-    ${CMAKE_SOURCE_DIR}/clang_archive_hashes/${CLANG_ARCHIVE_FULL_NAME}.SHA256)
-
-# Exit if Clang is already downloaded and extracted
-set(CLANG_ROOT ${CLANG_ARCHIVE_EXTRACT_DIR})
-find_package(Clang ${CLANG_VERSION} QUIET)
-if(Clang_FOUND)
-  message(STATUS "Clang already downloaded")
-  set(DOWNLOADED_CLANG_DIR ${CLANG_ARCHIVE_EXTRACT_DIR} PARENT_SCOPE)
-  return()
-endif()
-
-if(NOT CLANG_ARCHIVE_NAME)
-  message(FATAL_ERROR "No Clang archive url specified for current platform \
-(${CMAKE_SYSTEM_NAME}). Please file an issue to get it added.")
-endif()
-
-if(NOT EXISTS ${CLANG_ARCHIVE_HASH_FILE})
-  message(FATAL_ERROR "No SHA256 hash available for the current platform \
-(${CMAKE_SYSTEM_NAME}) + clang version (${CLANG_VERSION}) combination. Please \
-file an issue to get it added.")
-endif()
-
-# Download Clang archive
-message(STATUS "Downloading Clang ${CLANG_VERSION} (${CLANG_ARCHIVE_URL}) ...")
-file(DOWNLOAD ${CLANG_ARCHIVE_URL} ${CLANG_ARCHIVE_FILE}
-     STATUS CLANG_ARCHIVE_DOWNLOAD_RESULT)
-
-# Abort if download failed
-list(GET ${CLANG_ARCHIVE_DOWNLOAD_RESULT} 0 ERROR_CODE)
-if(${ERROR_CODE})
-  list(GET ${CLANG_ARCHIVE_DOWNLOAD_RESULT} 1 ERROR_STRING)
-  message(FATAL_ERROR ${ERROR_STRING})
-endif()
-
-# Retrieve expected hash from file and strip newline
-file(READ ${CLANG_ARCHIVE_HASH_FILE} CLANG_ARCHIVE_EXPECTED_HASH)
-string(STRIP ${CLANG_ARCHIVE_EXPECTED_HASH} CLANG_ARCHIVE_EXPECTED_HASH)
-# Calculate actual hash
-file(SHA256 ${CLANG_ARCHIVE_FILE} CLANG_ARCHIVE_HASH)
-# Abort if hashes do not match
-if(NOT ${CLANG_ARCHIVE_EXPECTED_HASH} STREQUAL ${CLANG_ARCHIVE_HASH})
-  message(FATAL_ERROR "SHA256 hash of downloaded Clang does not match \
-expected hash. Remove the build directory and try running CMake again. If this \
-keeps happening, file an issue to report the problem.")
-endif()
-
-if(${CLANG_ARCHIVE_EXT} STREQUAL .exe)
-  # Download and extract 7-zip if not found in PATH
-  find_program(7ZIP_EXECUTABLE 7z)
-  if(NOT 7ZIP_EXECUTABLE)
-    message(STATUS "7-Zip not found in PATH")
-
-    include(DownloadAndExtract7zip)
-    download_and_extract_7zip(${CLANG_DOWNLOAD_LOCATION})
-    find_program(7ZIP_EXECUTABLE
-      NAMES 7z
-      NO_DEFAULT_PATH
-      PATHS ${DOWNLOADED_7ZIP_DIR}
-    )
-  else()
-    message(STATUS "7-Zip found in PATH")
-  endif()
-
-  message(STATUS "Extracting downloaded Clang with 7-Zip ...")
-
-  # Avoid running the Clang installer by extracting the exe with 7-Zip
-  execute_process(
-    COMMAND ${7ZIP_EXECUTABLE} x 
-            -o${CLANG_ARCHIVE_EXTRACT_DIR} 
-            -xr!$PLUGINSDIR ${CLANG_ARCHIVE_FILE}
-    WORKING_DIRECTORY ${CLANG_DOWNLOAD_LOCATION}
-    OUTPUT_QUIET
-  )
-
-elseif(${CLANG_ARCHIVE_EXT} STREQUAL .tar.xz)
-  message(STATUS "Extracting downloaded Clang with CMake built-in tar ...")
-
-  # CMake has builtin support for tar via the -E flag
-  execute_process(
-    COMMAND ${CMAKE_COMMAND} -E tar -xf ${CLANG_ARCHIVE_FILE}
-    # Specify working directory to allow running cmake from 
-    # everywhere
-    # (example: cmake -H"$HOME/cquery" -B"$home/cquery/build")
-    WORKING_DIRECTORY ${CLANG_DOWNLOAD_LOCATION}
-    OUTPUT_QUIET
-  )
-endif()
-
-set(DOWNLOADED_CLANG_DIR ${CLANG_ARCHIVE_EXTRACT_DIR} PARENT_SCOPE)
-
-endfunction()

cmake/FindClang.cmake

@@ -72,7 +72,6 @@ _Clang_find_library(Clang_LIBRARY clangIndex)
 _Clang_find_add_library(clangFormat)
 _Clang_find_add_library(clangTooling)
 
-# TODO Remove after dropping clang 6
 _Clang_find_library(clangToolingInclusions_LIBRARY clangToolingInclusions)
 if (clangToolingInclusions_LIBRARY)
   list(APPEND _Clang_LIBRARIES ${clangToolingInclusions_LIBRARY})

src/clang_tu.cc

@@ -156,7 +156,6 @@ const char *ClangBuiltinTypeName(int kind) {
     return "double";
   case BuiltinType::LongDouble:
     return "long double";
-#if LLVM_VERSION_MAJOR >= 7
   case BuiltinType::ShortAccum:
     return "short _Accum";
   case BuiltinType::Accum:
@@ -205,7 +204,6 @@ const char *ClangBuiltinTypeName(int kind) {
     return "_Sat unsigned _Fract";
   case BuiltinType::BuiltinType::SatULongFract:
     return "_Sat unsigned long _Fract";
-#endif
   case BuiltinType::Float16:
     return "_Float16";
   case BuiltinType::Float128:
@@ -213,10 +211,8 @@ const char *ClangBuiltinTypeName(int kind) {
   case BuiltinType::WChar_S:
   case BuiltinType::WChar_U:
     return "wchar_t";
-#if LLVM_VERSION_MAJOR >= 7
   case BuiltinType::Char8:
     return "char8_t";
-#endif
   case BuiltinType::Char16:
     return "char16_t";
   case BuiltinType::Char32:

src/indexer.cc

@@ -593,11 +593,7 @@ public:
     if (init) {
       SourceManager &SM = Ctx->getSourceManager();
       const LangOptions &Lang = Ctx->getLangOpts();
-      SourceRange R = SM.getExpansionRange(init->getSourceRange())
+      SourceRange R = SM.getExpansionRange(init->getSourceRange()).getAsRange();
-#if LLVM_VERSION_MAJOR >= 7
-                          .getAsRange()
-#endif
-          ;
       SourceLocation L = D->getLocation();
       if (L.isMacroID() || !SM.isBeforeInTranslationUnit(L, R.getBegin()))
         return;
@@ -688,41 +684,15 @@ public:
   }
   bool handleDeclOccurence(const Decl *D, index::SymbolRoleSet Roles,
                            ArrayRef<index::SymbolRelation> Relations,
-#if LLVM_VERSION_MAJOR >= 7
+                           SourceLocation Loc, ASTNodeInfo ASTNode) override {
-                           SourceLocation Loc,
-#else
-                           FileID LocFID, unsigned LocOffset,
-#endif
-                           ASTNodeInfo ASTNode) override {
     SourceManager &SM = Ctx->getSourceManager();
     const LangOptions &Lang = Ctx->getLangOpts();
-#if LLVM_VERSION_MAJOR < 7
-    SourceLocation Loc;
-    {
-      const SrcMgr::SLocEntry &Entry = SM.getSLocEntry(LocFID);
-      unsigned off = Entry.getOffset() + LocOffset;
-      if (!Entry.isFile())
-        off |= 1u << 31;
-      Loc = SourceLocation::getFromRawEncoding(off);
-    }
-#else
     FileID LocFID;
-#endif
     SourceLocation Spell = SM.getSpellingLoc(Loc);
     const FileEntry *FE;
     Range loc;
-#if LLVM_VERSION_MAJOR < 7
-    CharSourceRange R;
-    if (SM.isMacroArgExpansion(Loc))
-      R = CharSourceRange::getTokenRange(Spell);
-    else {
-      auto P = SM.getExpansionRange(Loc);
-      R = CharSourceRange::getTokenRange(P.first, P.second);
-    }
-#else
     auto R = SM.isMacroArgExpansion(Loc) ? CharSourceRange::getTokenRange(Spell)
                                          : SM.getExpansionRange(Loc);
-#endif
     loc = FromCharSourceRange(SM, Lang, R);
     LocFID = SM.getFileID(R.getBegin());
     FE = SM.getFileEntryForID(LocFID);
@@ -1085,12 +1055,8 @@ public:
                           StringRef Included, bool IsAngled,
                           CharSourceRange FilenameRange, const FileEntry *File,
                           StringRef SearchPath, StringRef RelativePath,
-                          const Module *Imported
+                          const Module *Imported,
-#if LLVM_VERSION_MAJOR >= 7
+                          SrcMgr::CharacteristicKind FileType) override {
-                          ,
-                          SrcMgr::CharacteristicKind FileType
-#endif
-                          ) override {
     if (!File)
       return;
     llvm::sys::fs::UniqueID UniqueID;
@@ -1283,9 +1249,7 @@ Index(SemaManager *manager, WorkingFiles *wfiles, VFS *vfs,
   IndexOpts.SystemSymbolFilter =
       index::IndexingOptions::SystemSymbolFilterKind::All;
   IndexOpts.IndexFunctionLocals = true;
-#if LLVM_VERSION_MAJOR >= 7
   IndexOpts.IndexImplicitInstantiation = true;
-#endif
 
   std::unique_ptr<FrontendAction> Action = createIndexingAction(
       DataConsumer, IndexOpts, std::make_unique<IndexFrontendAction>(param));

src/log.cc

@@ -72,6 +72,7 @@ Message::~Message() {
   std::lock_guard<std::mutex> lock(mtx);
   stream_ << '\n';
   fputs(stream_.str().c_str(), file);
+  fflush(file);
   if (verbosity_ == Verbosity_FATAL)
     abort();
 }

src/main.cc

@@ -58,10 +58,10 @@ opt<std::string> opt_index("index",
                            value_desc("root"), cat(C));
 list<std::string> opt_init("init", desc("extra initialization options in JSON"),
                            cat(C));
-opt<std::string> opt_log_file("log-file", desc("log"), value_desc("filename"),
+opt<std::string> opt_log_file("log-file", desc("stderr or log file"),
+                              value_desc("file"), init("stderr"), cat(C));
+opt<bool> opt_log_file_append("log-file-append", desc("append to log file"),
                               cat(C));
-opt<std::string> opt_log_file_append("log-file-append", desc("log"),
-                                     value_desc("filename"), cat(C));
 
 void CloseLog() { fclose(ccls::log::file); }
 
@@ -95,14 +95,13 @@ int main(int argc, char **argv) {
 
   bool language_server = true;
 
-  if (opt_log_file.size() || opt_log_file_append.size()) {
+  if (opt_log_file.size()) {
-    ccls::log::file = opt_log_file.size()
+    ccls::log::file =
-                          ? fopen(opt_log_file.c_str(), "wb")
+        opt_log_file == "stderr"
-                          : fopen(opt_log_file_append.c_str(), "ab");
+            ? stderr
+            : fopen(opt_log_file.c_str(), opt_log_file_append ? "ab" : "wb");
     if (!ccls::log::file) {
-      fprintf(
+      fprintf(stderr, "failed to open %s\n", opt_log_file.c_str());
-          stderr, "failed to open %s\n",
-          (opt_log_file.size() ? opt_log_file : opt_log_file_append).c_str());
       return 2;
     }
     setbuf(ccls::log::file, NULL);

src/message_handler.cc

@@ -274,6 +274,8 @@ MessageHandler::FindOrFail(const std::string &path, ReplyOnce &reply,
   }
   QueryFile *file = FindFile(path, out_file_id);
   if (!file) {
+    if (!overdue)
+      throw NotIndexed{path};
     reply.Error(ErrorCode::InvalidRequest, "not indexed");
     return {nullptr, nullptr};
   }

src/messages/textDocument_completion.cc

@@ -436,7 +436,6 @@ public:
           ls_items[j].label = ls_items[j].filterText;
         }
       }
-#if LLVM_VERSION_MAJOR >= 7
       for (const FixItHint &FixIt : R.FixIts) {
         auto &AST = S.getASTContext();
         TextEdit ls_edit =
@@ -444,7 +443,6 @@ public:
         for (size_t j = first_idx; j < ls_items.size(); j++)
           ls_items[j].additionalTextEdits.push_back(ls_edit);
       }
-#endif
     }
   }
 
@@ -474,9 +472,7 @@ void MessageHandler::textDocument_completion(CompletionParam &param,
   clang::CodeCompleteOptions CCOpts;
   CCOpts.IncludeBriefComments = true;
   CCOpts.IncludeCodePatterns = StringRef(buffer_line).ltrim().startswith("#");
-#if LLVM_VERSION_MAJOR >= 7
   CCOpts.IncludeFixIts = true;
-#endif
   CCOpts.IncludeMacros = true;
 
   if (param.context.triggerKind == CompletionTriggerKind::TriggerCharacter &&

src/messages/textDocument_did.cc

@@ -65,7 +65,7 @@ void MessageHandler::textDocument_didOpen(DidOpenTextDocumentParam &param) {
 
 void MessageHandler::textDocument_didSave(TextDocumentParam &param) {
   const std::string &path = param.textDocument.uri.GetPath();
-  pipeline::Index(path, {}, IndexMode::Normal, true);
+  pipeline::Index(path, {}, IndexMode::Normal, false);
   manager->OnSave(path);
 }
 } // namespace ccls

src/messages/workspace.cc

@@ -69,7 +69,7 @@ void MessageHandler::workspace_didChangeWatchedFiles(
       break;
     }
     case FileChangeType::Deleted:
-      pipeline::Index(path, {}, mode, true);
+      pipeline::Index(path, {}, mode, false);
       manager->OnClose(path);
       break;
     }

src/platform.hh

@@ -28,8 +28,5 @@ void FreeUnusedMemory();
 // Stop self and wait for SIGCONT.
 void TraceMe();
 
-std::string GetExternalCommandOutput(const std::vector<std::string> &command,
-                                     std::string_view input);
-
 void SpawnThread(void *(*fn)(void *), void *arg);
 } // namespace ccls

src/platform_posix.cc

@@ -73,49 +73,6 @@ void TraceMe() {
     raise(traceme[0] == 's' ? SIGSTOP : SIGTSTP);
 }
 
-std::string GetExternalCommandOutput(const std::vector<std::string> &command,
-                                     std::string_view input) {
-  int pin[2], pout[2];
-  if (pipe(pin) < 0) {
-    perror("pipe(stdin)");
-    return "";
-  }
-  if (pipe(pout) < 0) {
-    perror("pipe(stdout)");
-    close(pin[0]);
-    close(pin[1]);
-    return "";
-  }
-  pid_t child = fork();
-  if (child == 0) {
-    dup2(pout[0], 0);
-    dup2(pin[1], 1);
-    close(pin[0]);
-    close(pin[1]);
-    close(pout[0]);
-    close(pout[1]);
-    auto argv = new char *[command.size() + 1];
-    for (size_t i = 0; i < command.size(); i++)
-      argv[i] = const_cast<char *>(command[i].c_str());
-    argv[command.size()] = nullptr;
-    execvp(argv[0], argv);
-    _Exit(127);
-  }
-  close(pin[1]);
-  close(pout[0]);
-  // O_NONBLOCK is disabled, write(2) blocks until all bytes are written.
-  (void)write(pout[1], input.data(), input.size());
-  close(pout[1]);
-  std::string ret;
-  char buf[4096];
-  ssize_t n;
-  while ((n = read(pin[0], buf, sizeof buf)) > 0)
-    ret.append(buf, n);
-  close(pin[0]);
-  waitpid(child, NULL, 0);
-  return ret;
-}
-
 void SpawnThread(void *(*fn)(void *), void *arg) {
   pthread_t thd;
   pthread_attr_t attr;

src/platform_win.cc

@@ -57,11 +57,6 @@ void FreeUnusedMemory() {}
 // TODO Wait for debugger to attach
 void TraceMe() {}
 
-std::string GetExternalCommandOutput(const std::vector<std::string> &command,
-                                     std::string_view input) {
-  return "";
-}
-
 void SpawnThread(void *(*fn)(void *), void *arg) {
   std::thread(fn, arg).detach();
 }

src/project.cc

@@ -31,13 +31,17 @@ limitations under the License.
 #include <llvm/ADT/STLExtras.h>
 #include <llvm/ADT/StringSet.h>
 #include <llvm/Support/LineIterator.h>
+#include <llvm/Support/Program.h>
 
 #include <rapidjson/writer.h>
 
-#if defined(__unix__) || defined(__APPLE__)
+#ifdef _WIN32
+# include <Windows.h>
+#else
 # include <unistd.h>
 #endif
 
+#include <array>
 #include <limits.h>
 #include <unordered_set>
 #include <vector>
@@ -308,7 +312,8 @@ int ComputeGuessScore(std::string_view a, std::string_view b) {
 } // namespace
 
 void Project::LoadDirectory(const std::string &root, Project::Folder &folder) {
-  SmallString<256> Path, CDBDir;
+  SmallString<256> CDBDir, Path, StdinPath;
+  std::string err_msg;
   folder.entries.clear();
   if (g_config->compilationDatabaseCommand.empty()) {
     CDBDir = root;
@@ -319,33 +324,49 @@ void Project::LoadDirectory(const std::string &root, Project::Folder &folder) {
     // If `compilationDatabaseCommand` is specified, execute it to get the
     // compdb.
 #ifdef _WIN32
-    // TODO
+    char tmpdir[L_tmpnam];
+    tmpnam_s(tmpdir, L_tmpnam);
+    CDBDir = tmpdir;
+    if (sys::fs::create_directory(tmpdir, false))
+      return;
 #else
     char tmpdir[] = "/tmp/ccls-compdb-XXXXXX";
     if (!mkdtemp(tmpdir))
       return;
     CDBDir = tmpdir;
+#endif
     sys::path::append(Path, CDBDir, "compile_commands.json");
-    rapidjson::StringBuffer input;
+    sys::path::append(StdinPath, CDBDir, "stdin");
-    rapidjson::Writer<rapidjson::StringBuffer> writer(input);
+    {
+      rapidjson::StringBuffer sb;
+      rapidjson::Writer<rapidjson::StringBuffer> writer(sb);
       JsonWriter json_writer(&writer);
       Reflect(json_writer, *g_config);
-    std::string contents = GetExternalCommandOutput(
+      std::string input = sb.GetString();
-        std::vector<std::string>{g_config->compilationDatabaseCommand, root},
+      FILE *fout = fopen(StdinPath.c_str(), "wb");
-        input.GetString());
+      fwrite(input.c_str(), input.size(), 1, fout);
-    FILE *fout = fopen(Path.c_str(), "wb");
-    fwrite(contents.c_str(), contents.size(), 1, fout);
       fclose(fout);
-#endif
+    }
+    std::array<Optional<StringRef>, 3> Redir{StringRef(StdinPath),
+                                             StringRef(Path), StringRef()};
+    std::vector<StringRef> args{g_config->compilationDatabaseCommand, root};
+    if (sys::ExecuteAndWait(args[0], args, llvm::None, Redir, 0, 0, &err_msg) <
+        0) {
+      LOG_S(ERROR) << "failed to execute " << args[0].str() << " "
+                   << args[1].str() << ": " << err_msg;
+      return;
+    }
   }
 
-  std::string err_msg;
   std::unique_ptr<tooling::CompilationDatabase> CDB =
       tooling::CompilationDatabase::loadFromDirectory(CDBDir, err_msg);
   if (!g_config->compilationDatabaseCommand.empty()) {
 #ifdef _WIN32
-    // TODO
+    DeleteFileA(StdinPath.c_str());
+    DeleteFileA(Path.c_str());
+    RemoveDirectoryA(CDBDir.c_str());
 #else
+    unlink(StdinPath.c_str());
     unlink(Path.c_str());
     rmdir(CDBDir.c_str());
 #endif
@@ -354,7 +375,10 @@ void Project::LoadDirectory(const std::string &root, Project::Folder &folder) {
   ProjectProcessor proc(folder);
   StringSet<> Seen;
   std::vector<Project::Entry> result;
-  if (CDB) {
+  if (!CDB) {
+    if (g_config->compilationDatabaseCommand.size() || sys::fs::exists(Path))
+      LOG_S(ERROR) << "failed to load " << Path.c_str();
+  } else {
     LOG_S(INFO) << "loaded " << Path.c_str();
     for (tooling::CompileCommand &Cmd : CDB->getAllCompileCommands()) {
       static bool once;

src/sema_manager.cc

@@ -190,11 +190,8 @@ public:
                           StringRef FileName, bool IsAngled,
                           CharSourceRange FilenameRange, const FileEntry *File,
                           StringRef SearchPath, StringRef RelativePath,
-                          const clang::Module *Imported
+                          const clang::Module *Imported,
-#if LLVM_VERSION_MAJOR >= 7
+                          SrcMgr::CharacteristicKind FileKind) override {
-                          , SrcMgr::CharacteristicKind FileKind
-#endif
-                          ) override {
     (void)SM;
     if (File && Seen.insert(File).second)
       out.emplace_back(PathFromFileEntry(*File), File->getModificationTime());
@@ -304,15 +301,10 @@ std::unique_ptr<CompilerInstance> BuildCompilerInstance(
     IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS, DiagnosticConsumer &DC,
     const PreambleData *preamble, const std::string &main,
     std::unique_ptr<llvm::MemoryBuffer> &Buf) {
-  if (preamble) {
+  if (preamble)
-#if LLVM_VERSION_MAJOR >= 7
     preamble->Preamble.OverridePreamble(*CI, FS, Buf.get());
-#else
+  else
-    preamble->Preamble.AddImplicitPreamble(*CI, FS, Buf.get());
-#endif
-  } else {
     CI->getPreprocessorOpts().addRemappedFile(main, Buf.get());
-  }
 
   auto Clang = std::make_unique<CompilerInstance>(session.PCH);
   Clang->setInvocation(std::move(CI));