#include "project.h"

#include "libclangmm/Utility.h"
#include "match.h"
#include "platform.h"
#include "serializer.h"
#include "utils.h"

#include <clang-c/CXCompilationDatabase.h>
#include <doctest/doctest.h>
#include <loguru.hpp>

#include <iostream>
#include <limits>
#include <sstream>
#include <unordered_set>
#include <vector>

struct CompileCommandsEntry {
  std::string directory;
  std::string file;
  std::string command;
  std::vector<std::string> args;
};
MAKE_REFLECT_STRUCT(CompileCommandsEntry, directory, file, command, args);

namespace {

bool g_disable_normalize_path_for_test = false;

std::string NormalizePathWithTestOptOut(const std::string& path) {
  if (g_disable_normalize_path_for_test)
    return "&" +
           path;  // Add a & so we can test to verify a path is normalized.
  return NormalizePath(path);
}

struct ProjectConfig {
  std::unordered_set<std::string> quote_dirs;
  std::unordered_set<std::string> angle_dirs;
  std::vector<std::string> extra_flags;
  std::string project_dir;
  std::string resource_dir;
};

// TODO: See
// https://github.com/Valloric/ycmd/blob/master/ycmd/completers/cpp/flags.py.
static std::vector<std::string> kBlacklistMulti = {
    "-MF", "-MT", "-MQ", "-o", "--serialize-diagnostics", "-Xclang"};

// Blacklisted flags which are always removed from the command line.
static std::vector<std::string> kBlacklist = {
    "-c",
    "-MP",
    "-MD",
    "-MMD",
    "--fcolor-diagnostics",

    // This strips path-like args but is a bit hacky.
    "/",
    "..",
};

// Arguments which are followed by a potentially relative path. We need to make
// all relative paths absolute, otherwise libclang will not resolve them.
static std::vector<std::string> kPathArgs = {
    "-I",        "-iquote",        "-isystem",     "--sysroot=",
    "-isysroot", "-gcc-toolchain", "-include-pch", "-iframework",
    "-F",        "-imacros"};

// Arguments whose path arguments should be injected into include dir lookup
// for #include completion.
static std::vector<std::string> kQuoteIncludeArgs = {"-iquote"};
static std::vector<std::string> kAngleIncludeArgs = {"-I", "-isystem"};

bool ShouldAddToQuoteIncludes(const std::string& arg) {
  return StartsWithAny(arg, kQuoteIncludeArgs);
}
bool ShouldAddToAngleIncludes(const std::string& arg) {
  return StartsWithAny(arg, kAngleIncludeArgs);
}

// Returns true if we should use the C, not C++, language spec for the given
// file.
bool IsCFile(const std::string& path) {
  return EndsWith(path, ".c");
}

Project::Entry GetCompilationEntryFromCompileCommandEntry(
    ProjectConfig* config,
    const CompileCommandsEntry& entry) {
  Project::Entry result;
  result.filename = NormalizePathWithTestOptOut(entry.file);

  size_t i = 0;

  // Strip all arguments before the -, as there may be non-compiler related
  // commands beforehand, ie, compiler schedular such as goma. This allows
  // correct parsing for command lines like "goma clang -c foo".
  while (i < entry.args.size() && entry.args[i][0] != '-')
    ++i;
  // Include the compiler in the args.
  if (i > 0)
    result.args.push_back(entry.args[i - 1]);

  bool next_flag_is_path = false;
  bool add_next_flag_to_quote_dirs = false;
  bool add_next_flag_to_angle_dirs = false;

  result.args.reserve(entry.args.size() + config->extra_flags.size());
  for (; i < entry.args.size(); ++i) {
    std::string arg = entry.args[i];

    // If blacklist skip.
    if (!next_flag_is_path) {
      if (StartsWithAny(arg, kBlacklistMulti)) {
        ++i;
        continue;
      }
      if (StartsWithAny(arg, kBlacklist))
        continue;
    }

    auto cleanup_maybe_relative_path = [entry](const std::string& path) {
      assert(!path.empty());
      if (path[0] == '/')
        return NormalizePathWithTestOptOut(path);
      return NormalizePathWithTestOptOut(entry.directory + "/" + path);
    };

    // Cleanup path for previous argument.
    if (next_flag_is_path) {
      arg = cleanup_maybe_relative_path(arg);

      if (add_next_flag_to_quote_dirs)
        config->quote_dirs.insert(arg);
      if (add_next_flag_to_angle_dirs)
        config->angle_dirs.insert(arg);

      next_flag_is_path = false;
      add_next_flag_to_quote_dirs = false;
      add_next_flag_to_angle_dirs = false;
    }

    // Update arg if it is a path.
    for (const std::string& flag_type : kPathArgs) {
      if (arg == flag_type) {
        next_flag_is_path = true;
        add_next_flag_to_quote_dirs = ShouldAddToQuoteIncludes(arg);
        add_next_flag_to_angle_dirs = ShouldAddToAngleIncludes(arg);
        break;
      }

      if (StartsWith(arg, flag_type)) {
        std::string path = arg.substr(flag_type.size());
        assert(!path.empty());
        path = cleanup_maybe_relative_path(path);
        arg = flag_type + path;
        if (ShouldAddToQuoteIncludes(arg))
          config->quote_dirs.insert(path);
        if (ShouldAddToAngleIncludes(arg))
          config->angle_dirs.insert(path);
        break;
      }
    }

    result.args.push_back(arg);
  }

  // We don't do any special processing on user-given extra flags.
  for (const auto& flag : config->extra_flags)
    result.args.push_back(flag);

  // Clang does not have good hueristics for determining source language, we
  // should explicitly specify it.
  if (!AnyStartsWith(result.args, "-x")) {
    if (IsCFile(entry.file))
      result.args.push_back("-xc");
    else
      result.args.push_back("-xc++");
  }
  if (!AnyStartsWith(result.args, "-std=")) {
    if (IsCFile(entry.file))
      result.args.push_back("-std=c11");
    else
      result.args.push_back("-std=c++11");
  }

  // Add -resource-dir so clang can correctly resolve system includes like
  // <cstddef>
  if (!AnyStartsWith(result.args, "-resource-dir"))
    result.args.push_back("-resource-dir=" + config->resource_dir);

  return result;
}

std::vector<Project::Entry> LoadFromDirectoryListing(ProjectConfig* config) {
  std::vector<Project::Entry> result;

  std::vector<std::string> args;
  std::cerr << "Using arguments: ";
  for (const std::string& line :
       ReadLines(config->project_dir + "/clang_args")) {
    if (line.empty() || StartsWith(line, "#"))
      continue;
    if (!args.empty())
      std::cerr << ", ";
    std::cerr << line;
    args.push_back(line);
  }
  std::cerr << std::endl;

  std::vector<std::string> files = GetFilesInFolder(
      config->project_dir, true /*recursive*/, true /*add_folder_to_path*/);
  for (const std::string& file : files) {
    if (EndsWith(file, ".cc") || EndsWith(file, ".cpp") ||
        EndsWith(file, ".c")) {
      CompileCommandsEntry e;
      e.file = NormalizePathWithTestOptOut(file);
      e.args = args;
      result.push_back(GetCompilationEntryFromCompileCommandEntry(config, e));
    }
  }

  return result;
}

std::vector<Project::Entry> LoadCompilationEntriesFromDirectory(
    ProjectConfig* config) {
  // Try to load compile_commands.json, but fallback to a project listing.
  LOG_S(INFO) << "Trying to load compile_commands.json";
  CXCompilationDatabase_Error cx_db_load_error;
  CXCompilationDatabase cx_db = clang_CompilationDatabase_fromDirectory(
      config->project_dir.c_str(), &cx_db_load_error);
  if (cx_db_load_error == CXCompilationDatabase_CanNotLoadDatabase) {
    LOG_S(INFO) << "Unable to load compile_commands.json located at \""
                << config->project_dir
                << "\"; using directory listing instead.";
    return LoadFromDirectoryListing(config);
  }

  CXCompileCommands cx_commands =
      clang_CompilationDatabase_getAllCompileCommands(cx_db);

  unsigned int num_commands = clang_CompileCommands_getSize(cx_commands);
  std::vector<Project::Entry> result;
  for (unsigned int i = 0; i < num_commands; i++) {
    CXCompileCommand cx_command =
        clang_CompileCommands_getCommand(cx_commands, i);

    std::string directory =
        clang::ToString(clang_CompileCommand_getDirectory(cx_command));
    std::string relative_filename =
        clang::ToString(clang_CompileCommand_getFilename(cx_command));
    std::string absolute_filename = directory + "/" + relative_filename;

    CompileCommandsEntry entry;
    entry.file = NormalizePathWithTestOptOut(absolute_filename);
    entry.directory = directory;

    unsigned num_args = clang_CompileCommand_getNumArgs(cx_command);
    entry.args.reserve(num_args);
    for (unsigned j = 0; j < num_args; ++j)
      entry.args.push_back(
          clang::ToString(clang_CompileCommand_getArg(cx_command, j)));

    result.push_back(GetCompilationEntryFromCompileCommandEntry(config, entry));
  }

  clang_CompileCommands_dispose(cx_commands);
  clang_CompilationDatabase_dispose(cx_db);

  return result;
}

// Computes a score based on how well |a| and |b| match. This is used for
// argument guessing.
int ComputeGuessScore(const std::string& a, const std::string& b) {
  const int kMatchPrefixWeight = 100;
  const int kMismatchDirectoryWeight = 100;
  const int kMatchPostfixWeight = 1;

  int score = 0;
  int i = 0;

  // Increase score based on matching prefix.
  for (i = 0; i < a.length() && i < b.length(); ++i) {
    if (a[i] != b[i])
      break;
    score += kMatchPrefixWeight;
  }

  // Reduce score based on mismatched directory distance.
  for (int j = i; j < a.length(); ++j) {
    if (a[j] == '/')
      score -= kMismatchDirectoryWeight;
  }
  for (int j = i; j < b.length(); ++j) {
    if (b[j] == '/')
      score -= kMismatchDirectoryWeight;
  }

  // Increase score based on common ending. Don't increase as much as matching
  // prefix or directory distance.
  for (int offset = 1; offset <= a.length() && offset <= b.length(); ++offset) {
    if (a[a.size() - offset] != b[b.size() - offset])
      break;
    score += kMatchPostfixWeight;
  }

  return score;
}

}  // namespace

void Project::Load(const std::vector<std::string>& extra_flags,
                   const std::string& directory,
                   const std::string& resource_directory) {
  // Load data.
  ProjectConfig config;
  config.extra_flags = extra_flags;
  config.project_dir = directory;
  config.resource_dir = resource_directory;
  entries = LoadCompilationEntriesFromDirectory(&config);

  // Cleanup / postprocess include directories.
  quote_include_directories.assign(config.quote_dirs.begin(),
                                   config.quote_dirs.end());
  angle_include_directories.assign(config.angle_dirs.begin(),
                                   config.angle_dirs.end());
  for (std::string& path : quote_include_directories) {
    EnsureEndsInSlash(path);
    LOG_S(INFO) << "quote_include_dir: " << path;
  }
  for (std::string& path : angle_include_directories) {
    EnsureEndsInSlash(path);
    LOG_S(INFO) << "angle_include_dir: " << path;
  }

  // Setup project entries.
  absolute_path_to_entry_index_.resize(entries.size());
  for (int i = 0; i < entries.size(); ++i)
    absolute_path_to_entry_index_[entries[i].filename] = i;
}

Project::Entry Project::FindCompilationEntryForFile(
    const std::string& filename) {
  auto it = absolute_path_to_entry_index_.find(filename);
  if (it != absolute_path_to_entry_index_.end())
    return entries[it->second];

  // We couldn't find the file. Try to infer it.
  // TODO: Cache inferred file in a separate array (using a lock or similar)
  Entry* best_entry = nullptr;
  int best_score = std::numeric_limits<int>::min();
  for (Entry& entry : entries) {
    int score = ComputeGuessScore(filename, entry.filename);
    if (score > best_score) {
      best_score = score;
      best_entry = &entry;
    }
  }

  Project::Entry result;
  result.is_inferred = true;
  result.filename = filename;
  if (best_entry)
    result.args = best_entry->args;
  return result;
}

void Project::ForAllFilteredFiles(
    Config* config,
    std::function<void(int i, const Entry& entry)> action) {
  GroupMatch matcher(config->indexWhitelist, config->indexBlacklist);
  for (int i = 0; i < entries.size(); ++i) {
    const Project::Entry& entry = entries[i];
    std::string failure_reason;
    if (matcher.IsMatch(entry.filename, &failure_reason))
      action(i, entries[i]);
    else {
      if (config->logSkippedPathsForIndex) {
        LOG_S(INFO) << "[" << i + 1 << "/" << entries.size() << "]: Failed "
                    << failure_reason << "; skipping " << entry.filename;
      }
    }
  }
}

TEST_SUITE("Project");

void CheckFlags(const std::string& directory,
                const std::string& file,
                std::vector<std::string> raw,
                std::vector<std::string> expected) {
  g_disable_normalize_path_for_test = true;

  ProjectConfig config;
  config.project_dir = "/w/c/s/";
  config.resource_dir = "/w/resource_dir/";

  CompileCommandsEntry entry;
  entry.directory = directory;
  entry.args = raw;
  entry.file = file;
  Project::Entry result =
      GetCompilationEntryFromCompileCommandEntry(&config, entry);

  bool printed_header = false;
  for (int i = 0; i < std::min(result.args.size(), expected.size()); ++i) {
    if (result.args[i] != expected[i]) {
      if (!printed_header) {
        printed_header = true;
        std::cout << "Expected - Actual\n\n";
      }

      std::cout << "mismatch at " << i << "; expected " << expected[i]
                << " but got " << result.args[i] << std::endl;
    }
  }
  REQUIRE(result.args == expected);
}

void CheckFlags(std::vector<std::string> raw,
                std::vector<std::string> expected) {
  CheckFlags("/dir/", "file.cc", raw, expected);
}

TEST_CASE("strip meta-compiler invocations") {
  CheckFlags(
      /* raw */ {"clang", "-lstdc++", "myfile.cc"},
      /* expected */ {"clang", "-lstdc++", "myfile.cc", "-xc++", "-std=c++11",
                      "-resource-dir=/w/resource_dir/"});

  CheckFlags(/* raw */ {"goma", "clang"},
             /* expected */ {"clang", "-xc++", "-std=c++11",
                             "-resource-dir=/w/resource_dir/"});

  CheckFlags(/* raw */ {"goma", "clang", "--foo"},
             /* expected */ {"clang", "--foo", "-xc++", "-std=c++11",
                             "-resource-dir=/w/resource_dir/"});
}

// Checks flag parsing for a random chromium file in comparison to what
// YouCompleteMe fetches.
TEST_CASE("ycm") {
  CheckFlags(
      "/w/c/s/out/Release", "../../ash/login/lock_screen_sanity_unittest.cc",

      /* raw */
      {
          "/work/goma/gomacc",
          "../../third_party/llvm-build/Release+Asserts/bin/clang++",
          "-MMD",
          "-MF",
          "obj/ash/ash_unittests/lock_screen_sanity_unittest.o.d",
          "-DV8_DEPRECATION_WARNINGS",
          "-DDCHECK_ALWAYS_ON=1",
          "-DUSE_UDEV",
          "-DUSE_AURA=1",
          "-DUSE_NSS_CERTS=1",
          "-DUSE_OZONE=1",
          "-DFULL_SAFE_BROWSING",
          "-DSAFE_BROWSING_CSD",
          "-DSAFE_BROWSING_DB_LOCAL",
          "-DCHROMIUM_BUILD",
          "-DFIELDTRIAL_TESTING_ENABLED",
          "-D_FILE_OFFSET_BITS=64",
          "-D_LARGEFILE_SOURCE",
          "-D_LARGEFILE64_SOURCE",
          "-DCR_CLANG_REVISION=\"313786-1\"",
          "-D__STDC_CONSTANT_MACROS",
          "-D__STDC_FORMAT_MACROS",
          "-DCOMPONENT_BUILD",
          "-DOS_CHROMEOS",
          "-DNDEBUG",
          "-DNVALGRIND",
          "-DDYNAMIC_ANNOTATIONS_ENABLED=0",
          "-DGL_GLEXT_PROTOTYPES",
          "-DUSE_GLX",
          "-DUSE_EGL",
          "-DANGLE_ENABLE_RELEASE_ASSERTS",
          "-DTOOLKIT_VIEWS=1",
          "-DGTEST_API_=",
          "-DGTEST_HAS_POSIX_RE=0",
          "-DGTEST_LANG_CXX11=1",
          "-DUNIT_TEST",
          "-DUSING_V8_SHARED",
          "-DU_USING_ICU_NAMESPACE=0",
          "-DU_ENABLE_DYLOAD=0",
          "-DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE",
          "-DUCHAR_TYPE=uint16_t",
          "-DGOOGLE_PROTOBUF_NO_RTTI",
          "-DGOOGLE_PROTOBUF_NO_STATIC_INITIALIZER",
          "-DHAVE_PTHREAD",
          "-DPROTOBUF_USE_DLLS",
          "-DBORINGSSL_SHARED_LIBRARY",
          "-DSK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS",
          "-DSK_HAS_PNG_LIBRARY",
          "-DSK_HAS_WEBP_LIBRARY",
          "-DSK_HAS_JPEG_LIBRARY",
          "-DSKIA_DLL",
          "-DGR_GL_IGNORE_ES3_MSAA=0",
          "-DSK_SUPPORT_GPU=1",
          "-DMESA_EGL_NO_X11_HEADERS",
          "-I../..",
          "-Igen",
          "-I../../third_party/libwebp/src",
          "-I../../third_party/khronos",
          "-I../../gpu",
          "-I../../third_party/googletest/src/googletest/include",
          "-I../../third_party/WebKit",
          "-Igen/third_party/WebKit",
          "-I../../v8/include",
          "-Igen/v8/include",
          "-I../../third_party/icu/source/common",
          "-I../../third_party/icu/source/i18n",
          "-I../../third_party/protobuf/src",
          "-Igen/protoc_out",
          "-I../../third_party/protobuf/src",
          "-I../../third_party/boringssl/src/include",
          "-I../../build/linux/debian_jessie_amd64-sysroot/usr/include/nss",
          "-I../../build/linux/debian_jessie_amd64-sysroot/usr/include/nspr",
          "-I../../skia/config",
          "-I../../skia/ext",
          "-I../../third_party/skia/include/c",
          "-I../../third_party/skia/include/config",
          "-I../../third_party/skia/include/core",
          "-I../../third_party/skia/include/effects",
          "-I../../third_party/skia/include/encode",
          "-I../../third_party/skia/include/gpu",
          "-I../../third_party/skia/include/images",
          "-I../../third_party/skia/include/lazy",
          "-I../../third_party/skia/include/pathops",
          "-I../../third_party/skia/include/pdf",
          "-I../../third_party/skia/include/pipe",
          "-I../../third_party/skia/include/ports",
          "-I../../third_party/skia/include/utils",
          "-I../../third_party/skia/third_party/vulkan",
          "-I../../third_party/skia/include/codec",
          "-I../../third_party/skia/src/gpu",
          "-I../../third_party/skia/src/sksl",
          "-I../../third_party/ced/src",
          "-I../../third_party/mesa/src/include",
          "-I../../third_party/libwebm/source",
          "-Igen",
          "-I../../build/linux/debian_jessie_amd64-sysroot/usr/include/"
          "dbus-1.0",
          "-I../../build/linux/debian_jessie_amd64-sysroot/usr/lib/"
          "x86_64-linux-gnu/dbus-1.0/include",
          "-I../../third_party/googletest/custom",
          "-I../../third_party/googletest/src/googlemock/include",
          "-fno-strict-aliasing",
          "-Wno-builtin-macro-redefined",
          "-D__DATE__=",
          "-D__TIME__=",
          "-D__TIMESTAMP__=",
          "-funwind-tables",
          "-fPIC",
          "-pipe",
          "-B../../third_party/binutils/Linux_x64/Release/bin",
          "-pthread",
          "-fcolor-diagnostics",
          "-no-canonical-prefixes",
          "-m64",
          "-march=x86-64",
          "-Wall",
          "-Werror",
          "-Wextra",
          "-Wno-missing-field-initializers",
          "-Wno-unused-parameter",
          "-Wno-c++11-narrowing",
          "-Wno-covered-switch-default",
          "-Wno-unneeded-internal-declaration",
          "-Wno-inconsistent-missing-override",
          "-Wno-undefined-var-template",
          "-Wno-nonportable-include-path",
          "-Wno-address-of-packed-member",
          "-Wno-unused-lambda-capture",
          "-Wno-user-defined-warnings",
          "-Wno-enum-compare-switch",
          "-Wno-tautological-unsigned-zero-compare",
          "-Wno-null-pointer-arithmetic",
          "-Wno-tautological-unsigned-enum-zero-compare",
          "-O2",
          "-fno-ident",
          "-fdata-sections",
          "-ffunction-sections",
          "-fno-omit-frame-pointer",
          "-g0",
          "-fvisibility=hidden",
          "-Xclang",
          "-load",
          "-Xclang",
          "../../third_party/llvm-build/Release+Asserts/lib/"
          "libFindBadConstructs.so",
          "-Xclang",
          "-add-plugin",
          "-Xclang",
          "find-bad-constructs",
          "-Xclang",
          "-plugin-arg-find-bad-constructs",
          "-Xclang",
          "check-auto-raw-pointer",
          "-Xclang",
          "-plugin-arg-find-bad-constructs",
          "-Xclang",
          "check-ipc",
          "-Wheader-hygiene",
          "-Wstring-conversion",
          "-Wtautological-overlap-compare",
          "-Wno-header-guard",
          "-std=gnu++14",
          "-fno-rtti",
          "-nostdinc++",
          "-isystem../../buildtools/third_party/libc++/trunk/include",
          "-isystem../../buildtools/third_party/libc++abi/trunk/include",
          "--sysroot=../../build/linux/debian_jessie_amd64-sysroot",
          "-fno-exceptions",
          "-fvisibility-inlines-hidden",
          "-c",
          "../../ash/login/ui/lock_screen_sanity_unittest.cc",
          "-o",
          "obj/ash/ash_unittests/lock_screen_sanity_unittest.o",
      },

      /* expected */
      {"../../third_party/llvm-build/Release+Asserts/bin/clang++",
       "-DV8_DEPRECATION_WARNINGS",
       "-DDCHECK_ALWAYS_ON=1",
       "-DUSE_UDEV",
       "-DUSE_AURA=1",
       "-DUSE_NSS_CERTS=1",
       "-DUSE_OZONE=1",
       "-DFULL_SAFE_BROWSING",
       "-DSAFE_BROWSING_CSD",
       "-DSAFE_BROWSING_DB_LOCAL",
       "-DCHROMIUM_BUILD",
       "-DFIELDTRIAL_TESTING_ENABLED",
       "-D_FILE_OFFSET_BITS=64",
       "-D_LARGEFILE_SOURCE",
       "-D_LARGEFILE64_SOURCE",
       "-DCR_CLANG_REVISION=\"313786-1\"",
       "-D__STDC_CONSTANT_MACROS",
       "-D__STDC_FORMAT_MACROS",
       "-DCOMPONENT_BUILD",
       "-DOS_CHROMEOS",
       "-DNDEBUG",
       "-DNVALGRIND",
       "-DDYNAMIC_ANNOTATIONS_ENABLED=0",
       "-DGL_GLEXT_PROTOTYPES",
       "-DUSE_GLX",
       "-DUSE_EGL",
       "-DANGLE_ENABLE_RELEASE_ASSERTS",
       "-DTOOLKIT_VIEWS=1",
       "-DGTEST_API_=",
       "-DGTEST_HAS_POSIX_RE=0",
       "-DGTEST_LANG_CXX11=1",
       "-DUNIT_TEST",
       "-DUSING_V8_SHARED",
       "-DU_USING_ICU_NAMESPACE=0",
       "-DU_ENABLE_DYLOAD=0",
       "-DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE",
       "-DUCHAR_TYPE=uint16_t",
       "-DGOOGLE_PROTOBUF_NO_RTTI",
       "-DGOOGLE_PROTOBUF_NO_STATIC_INITIALIZER",
       "-DHAVE_PTHREAD",
       "-DPROTOBUF_USE_DLLS",
       "-DBORINGSSL_SHARED_LIBRARY",
       "-DSK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS",
       "-DSK_HAS_PNG_LIBRARY",
       "-DSK_HAS_WEBP_LIBRARY",
       "-DSK_HAS_JPEG_LIBRARY",
       "-DSKIA_DLL",
       "-DGR_GL_IGNORE_ES3_MSAA=0",
       "-DSK_SUPPORT_GPU=1",
       "-DMESA_EGL_NO_X11_HEADERS",
       "-I&/w/c/s/out/Release/../..",
       "-I&/w/c/s/out/Release/gen",
       "-I&/w/c/s/out/Release/../../third_party/libwebp/src",
       "-I&/w/c/s/out/Release/../../third_party/khronos",
       "-I&/w/c/s/out/Release/../../gpu",
       "-I&/w/c/s/out/Release/../../third_party/googletest/src/googletest/"
       "include",
       "-I&/w/c/s/out/Release/../../third_party/WebKit",
       "-I&/w/c/s/out/Release/gen/third_party/WebKit",
       "-I&/w/c/s/out/Release/../../v8/include",
       "-I&/w/c/s/out/Release/gen/v8/include",
       "-I&/w/c/s/out/Release/../../third_party/icu/source/common",
       "-I&/w/c/s/out/Release/../../third_party/icu/source/i18n",
       "-I&/w/c/s/out/Release/../../third_party/protobuf/src",
       "-I&/w/c/s/out/Release/gen/protoc_out",
       "-I&/w/c/s/out/Release/../../third_party/protobuf/src",
       "-I&/w/c/s/out/Release/../../third_party/boringssl/src/include",
       "-I&/w/c/s/out/Release/../../build/linux/debian_jessie_amd64-sysroot/"
       "usr/include/nss",
       "-I&/w/c/s/out/Release/../../build/linux/debian_jessie_amd64-sysroot/"
       "usr/include/nspr",
       "-I&/w/c/s/out/Release/../../skia/config",
       "-I&/w/c/s/out/Release/../../skia/ext",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/c",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/config",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/core",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/effects",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/encode",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/gpu",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/images",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/lazy",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/pathops",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/pdf",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/pipe",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/ports",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/utils",
       "-I&/w/c/s/out/Release/../../third_party/skia/third_party/vulkan",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/codec",
       "-I&/w/c/s/out/Release/../../third_party/skia/src/gpu",
       "-I&/w/c/s/out/Release/../../third_party/skia/src/sksl",
       "-I&/w/c/s/out/Release/../../third_party/ced/src",
       "-I&/w/c/s/out/Release/../../third_party/mesa/src/include",
       "-I&/w/c/s/out/Release/../../third_party/libwebm/source",
       "-I&/w/c/s/out/Release/gen",
       "-I&/w/c/s/out/Release/../../build/linux/debian_jessie_amd64-sysroot/"
       "usr/include/dbus-1.0",
       "-I&/w/c/s/out/Release/../../build/linux/debian_jessie_amd64-sysroot/"
       "usr/lib/x86_64-linux-gnu/dbus-1.0/include",
       "-I&/w/c/s/out/Release/../../third_party/googletest/custom",
       "-I&/w/c/s/out/Release/../../third_party/googletest/src/googlemock/"
       "include",
       "-fno-strict-aliasing",
       "-Wno-builtin-macro-redefined",
       "-D__DATE__=",
       "-D__TIME__=",
       "-D__TIMESTAMP__=",
       "-funwind-tables",
       "-fPIC",
       "-pipe",
       "-B../../third_party/binutils/Linux_x64/Release/bin",
       "-pthread",
       "-fcolor-diagnostics",
       "-no-canonical-prefixes",
       "-m64",
       "-march=x86-64",
       "-Wall",
       "-Werror",
       "-Wextra",
       "-Wno-missing-field-initializers",
       "-Wno-unused-parameter",
       "-Wno-c++11-narrowing",
       "-Wno-covered-switch-default",
       "-Wno-unneeded-internal-declaration",
       "-Wno-inconsistent-missing-override",
       "-Wno-undefined-var-template",
       "-Wno-nonportable-include-path",
       "-Wno-address-of-packed-member",
       "-Wno-unused-lambda-capture",
       "-Wno-user-defined-warnings",
       "-Wno-enum-compare-switch",
       "-Wno-tautological-unsigned-zero-compare",
       "-Wno-null-pointer-arithmetic",
       "-Wno-tautological-unsigned-enum-zero-compare",
       "-O2",
       "-fno-ident",
       "-fdata-sections",
       "-ffunction-sections",
       "-fno-omit-frame-pointer",
       "-g0",
       "-fvisibility=hidden",
       "-Wheader-hygiene",
       "-Wstring-conversion",
       "-Wtautological-overlap-compare",
       "-Wno-header-guard",
       "-std=gnu++14",
       "-fno-rtti",
       "-nostdinc++",
       "-isystem&/w/c/s/out/Release/../../buildtools/third_party/libc++/trunk/"
       "include",
       "-isystem&/w/c/s/out/Release/../../buildtools/third_party/libc++abi/"
       "trunk/"
       "include",
       "--sysroot=&/w/c/s/out/Release/../../build/linux/"
       "debian_jessie_amd64-sysroot",
       "-fno-exceptions",
       "-fvisibility-inlines-hidden",
       "-xc++",
       "-resource-dir=/w/resource_dir/"});
}

// Checks flag parsing for an example chromium file.
TEST_CASE("chromium") {
  CheckFlags(
      "/w/c/s/out/Release", "../../apps/app_lifetime_monitor.cc",
      /* raw */
      {"/work/goma/gomacc",
       "../../third_party/llvm-build/Release+Asserts/bin/clang++",
       "-MMD",
       "-MF",
       "obj/apps/apps/app_lifetime_monitor.o.d",
       "-DV8_DEPRECATION_WARNINGS",
       "-DDCHECK_ALWAYS_ON=1",
       "-DUSE_UDEV",
       "-DUSE_ASH=1",
       "-DUSE_AURA=1",
       "-DUSE_NSS_CERTS=1",
       "-DUSE_OZONE=1",
       "-DDISABLE_NACL",
       "-DFULL_SAFE_BROWSING",
       "-DSAFE_BROWSING_CSD",
       "-DSAFE_BROWSING_DB_LOCAL",
       "-DCHROMIUM_BUILD",
       "-DFIELDTRIAL_TESTING_ENABLED",
       "-DCR_CLANG_REVISION=\"310694-1\"",
       "-D_FILE_OFFSET_BITS=64",
       "-D_LARGEFILE_SOURCE",
       "-D_LARGEFILE64_SOURCE",
       "-D__STDC_CONSTANT_MACROS",
       "-D__STDC_FORMAT_MACROS",
       "-DCOMPONENT_BUILD",
       "-DOS_CHROMEOS",
       "-DNDEBUG",
       "-DNVALGRIND",
       "-DDYNAMIC_ANNOTATIONS_ENABLED=0",
       "-DGL_GLEXT_PROTOTYPES",
       "-DUSE_GLX",
       "-DUSE_EGL",
       "-DANGLE_ENABLE_RELEASE_ASSERTS",
       "-DTOOLKIT_VIEWS=1",
       "-DV8_USE_EXTERNAL_STARTUP_DATA",
       "-DU_USING_ICU_NAMESPACE=0",
       "-DU_ENABLE_DYLOAD=0",
       "-DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE",
       "-DUCHAR_TYPE=uint16_t",
       "-DGOOGLE_PROTOBUF_NO_RTTI",
       "-DGOOGLE_PROTOBUF_NO_STATIC_INITIALIZER",
       "-DHAVE_PTHREAD",
       "-DPROTOBUF_USE_DLLS",
       "-DSK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS",
       "-DSK_HAS_PNG_LIBRARY",
       "-DSK_HAS_WEBP_LIBRARY",
       "-DSK_HAS_JPEG_LIBRARY",
       "-DSKIA_DLL",
       "-DGR_GL_IGNORE_ES3_MSAA=0",
       "-DSK_SUPPORT_GPU=1",
       "-DMESA_EGL_NO_X11_HEADERS",
       "-DBORINGSSL_SHARED_LIBRARY",
       "-DUSING_V8_SHARED",
       "-I../..",
       "-Igen",
       "-I../../third_party/libwebp/src",
       "-I../../third_party/khronos",
       "-I../../gpu",
       "-I../../third_party/ced/src",
       "-I../../third_party/icu/source/common",
       "-I../../third_party/icu/source/i18n",
       "-I../../third_party/protobuf/src",
       "-I../../skia/config",
       "-I../../skia/ext",
       "-I../../third_party/skia/include/c",
       "-I../../third_party/skia/include/config",
       "-I../../third_party/skia/include/core",
       "-I../../third_party/skia/include/effects",
       "-I../../third_party/skia/include/encode",
       "-I../../third_party/skia/include/gpu",
       "-I../../third_party/skia/include/images",
       "-I../../third_party/skia/include/lazy",
       "-I../../third_party/skia/include/pathops",
       "-I../../third_party/skia/include/pdf",
       "-I../../third_party/skia/include/pipe",
       "-I../../third_party/skia/include/ports",
       "-I../../third_party/skia/include/utils",
       "-I../../third_party/skia/third_party/vulkan",
       "-I../../third_party/skia/src/gpu",
       "-I../../third_party/skia/src/sksl",
       "-I../../third_party/mesa/src/include",
       "-I../../third_party/libwebm/source",
       "-I../../third_party/protobuf/src",
       "-Igen/protoc_out",
       "-I../../third_party/boringssl/src/include",
       "-I../../build/linux/debian_jessie_amd64-sysroot/usr/include/nss",
       "-I../../build/linux/debian_jessie_amd64-sysroot/usr/include/nspr",
       "-Igen",
       "-I../../third_party/WebKit",
       "-Igen/third_party/WebKit",
       "-I../../v8/include",
       "-Igen/v8/include",
       "-Igen",
       "-I../../third_party/flatbuffers/src/include",
       "-Igen",
       "-fno-strict-aliasing",
       "-Wno-builtin-macro-redefined",
       "-D__DATE__=",
       "-D__TIME__=",
       "-D__TIMESTAMP__=",
       "-funwind-tables",
       "-fPIC",
       "-pipe",
       "-B../../third_party/binutils/Linux_x64/Release/bin",
       "-pthread",
       "-fcolor-diagnostics",
       "-m64",
       "-march=x86-64",
       "-Wall",
       "-Werror",
       "-Wextra",
       "-Wno-missing-field-initializers",
       "-Wno-unused-parameter",
       "-Wno-c++11-narrowing",
       "-Wno-covered-switch-default",
       "-Wno-unneeded-internal-declaration",
       "-Wno-inconsistent-missing-override",
       "-Wno-undefined-var-template",
       "-Wno-nonportable-include-path",
       "-Wno-address-of-packed-member",
       "-Wno-unused-lambda-capture",
       "-Wno-user-defined-warnings",
       "-Wno-enum-compare-switch",
       "-O2",
       "-fno-ident",
       "-fdata-sections",
       "-ffunction-sections",
       "-fno-omit-frame-pointer",
       "-g0",
       "-fvisibility=hidden",
       "-Xclang",
       "-load",
       "-Xclang",
       "../../third_party/llvm-build/Release+Asserts/lib/"
       "libFindBadConstructs.so",
       "-Xclang",
       "-add-plugin",
       "-Xclang",
       "find-bad-constructs",
       "-Xclang",
       "-plugin-arg-find-bad-constructs",
       "-Xclang",
       "check-auto-raw-pointer",
       "-Xclang",
       "-plugin-arg-find-bad-constructs",
       "-Xclang",
       "check-ipc",
       "-Wheader-hygiene",
       "-Wstring-conversion",
       "-Wtautological-overlap-compare",
       "-Wexit-time-destructors",
       "-Wno-header-guard",
       "-Wno-exit-time-destructors",
       "-std=gnu++14",
       "-fno-rtti",
       "-nostdinc++",
       "-isystem../../buildtools/third_party/libc++/trunk/include",
       "-isystem../../buildtools/third_party/libc++abi/trunk/include",
       "--sysroot=../../build/linux/debian_jessie_amd64-sysroot",
       "-fno-exceptions",
       "-fvisibility-inlines-hidden"},

      /* expected */
      {"../../third_party/llvm-build/Release+Asserts/bin/clang++",
       "-DV8_DEPRECATION_WARNINGS",
       "-DDCHECK_ALWAYS_ON=1",
       "-DUSE_UDEV",
       "-DUSE_ASH=1",
       "-DUSE_AURA=1",
       "-DUSE_NSS_CERTS=1",
       "-DUSE_OZONE=1",
       "-DDISABLE_NACL",
       "-DFULL_SAFE_BROWSING",
       "-DSAFE_BROWSING_CSD",
       "-DSAFE_BROWSING_DB_LOCAL",
       "-DCHROMIUM_BUILD",
       "-DFIELDTRIAL_TESTING_ENABLED",
       "-DCR_CLANG_REVISION=\"310694-1\"",
       "-D_FILE_OFFSET_BITS=64",
       "-D_LARGEFILE_SOURCE",
       "-D_LARGEFILE64_SOURCE",
       "-D__STDC_CONSTANT_MACROS",
       "-D__STDC_FORMAT_MACROS",
       "-DCOMPONENT_BUILD",
       "-DOS_CHROMEOS",
       "-DNDEBUG",
       "-DNVALGRIND",
       "-DDYNAMIC_ANNOTATIONS_ENABLED=0",
       "-DGL_GLEXT_PROTOTYPES",
       "-DUSE_GLX",
       "-DUSE_EGL",
       "-DANGLE_ENABLE_RELEASE_ASSERTS",
       "-DTOOLKIT_VIEWS=1",
       "-DV8_USE_EXTERNAL_STARTUP_DATA",
       "-DU_USING_ICU_NAMESPACE=0",
       "-DU_ENABLE_DYLOAD=0",
       "-DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE",
       "-DUCHAR_TYPE=uint16_t",
       "-DGOOGLE_PROTOBUF_NO_RTTI",
       "-DGOOGLE_PROTOBUF_NO_STATIC_INITIALIZER",
       "-DHAVE_PTHREAD",
       "-DPROTOBUF_USE_DLLS",
       "-DSK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS",
       "-DSK_HAS_PNG_LIBRARY",
       "-DSK_HAS_WEBP_LIBRARY",
       "-DSK_HAS_JPEG_LIBRARY",
       "-DSKIA_DLL",
       "-DGR_GL_IGNORE_ES3_MSAA=0",
       "-DSK_SUPPORT_GPU=1",
       "-DMESA_EGL_NO_X11_HEADERS",
       "-DBORINGSSL_SHARED_LIBRARY",
       "-DUSING_V8_SHARED",
       "-I&/w/c/s/out/Release/../..",
       "-I&/w/c/s/out/Release/gen",
       "-I&/w/c/s/out/Release/../../third_party/libwebp/src",
       "-I&/w/c/s/out/Release/../../third_party/khronos",
       "-I&/w/c/s/out/Release/../../gpu",
       "-I&/w/c/s/out/Release/../../third_party/ced/src",
       "-I&/w/c/s/out/Release/../../third_party/icu/source/common",
       "-I&/w/c/s/out/Release/../../third_party/icu/source/i18n",
       "-I&/w/c/s/out/Release/../../third_party/protobuf/src",
       "-I&/w/c/s/out/Release/../../skia/config",
       "-I&/w/c/s/out/Release/../../skia/ext",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/c",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/config",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/core",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/effects",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/encode",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/gpu",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/images",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/lazy",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/pathops",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/pdf",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/pipe",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/ports",
       "-I&/w/c/s/out/Release/../../third_party/skia/include/utils",
       "-I&/w/c/s/out/Release/../../third_party/skia/third_party/vulkan",
       "-I&/w/c/s/out/Release/../../third_party/skia/src/gpu",
       "-I&/w/c/s/out/Release/../../third_party/skia/src/sksl",
       "-I&/w/c/s/out/Release/../../third_party/mesa/src/include",
       "-I&/w/c/s/out/Release/../../third_party/libwebm/source",
       "-I&/w/c/s/out/Release/../../third_party/protobuf/src",
       "-I&/w/c/s/out/Release/gen/protoc_out",
       "-I&/w/c/s/out/Release/../../third_party/boringssl/src/include",
       "-I&/w/c/s/out/Release/../../build/linux/debian_jessie_amd64-sysroot/"
       "usr/include/nss",
       "-I&/w/c/s/out/Release/../../build/linux/debian_jessie_amd64-sysroot/"
       "usr/include/nspr",
       "-I&/w/c/s/out/Release/gen",
       "-I&/w/c/s/out/Release/../../third_party/WebKit",
       "-I&/w/c/s/out/Release/gen/third_party/WebKit",
       "-I&/w/c/s/out/Release/../../v8/include",
       "-I&/w/c/s/out/Release/gen/v8/include",
       "-I&/w/c/s/out/Release/gen",
       "-I&/w/c/s/out/Release/../../third_party/flatbuffers/src/include",
       "-I&/w/c/s/out/Release/gen",
       "-fno-strict-aliasing",
       "-Wno-builtin-macro-redefined",
       "-D__DATE__=",
       "-D__TIME__=",
       "-D__TIMESTAMP__=",
       "-funwind-tables",
       "-fPIC",
       "-pipe",
       "-B../../third_party/binutils/Linux_x64/Release/bin",
       "-pthread",
       "-fcolor-diagnostics",
       "-m64",
       "-march=x86-64",
       "-Wall",
       "-Werror",
       "-Wextra",
       "-Wno-missing-field-initializers",
       "-Wno-unused-parameter",
       "-Wno-c++11-narrowing",
       "-Wno-covered-switch-default",
       "-Wno-unneeded-internal-declaration",
       "-Wno-inconsistent-missing-override",
       "-Wno-undefined-var-template",
       "-Wno-nonportable-include-path",
       "-Wno-address-of-packed-member",
       "-Wno-unused-lambda-capture",
       "-Wno-user-defined-warnings",
       "-Wno-enum-compare-switch",
       "-O2",
       "-fno-ident",
       "-fdata-sections",
       "-ffunction-sections",
       "-fno-omit-frame-pointer",
       "-g0",
       "-fvisibility=hidden",
       "-Wheader-hygiene",
       "-Wstring-conversion",
       "-Wtautological-overlap-compare",
       "-Wexit-time-destructors",
       "-Wno-header-guard",
       "-Wno-exit-time-destructors",
       "-std=gnu++14",
       "-fno-rtti",
       "-nostdinc++",
       "-isystem&/w/c/s/out/Release/../../buildtools/third_party/libc++/trunk/"
       "include",
       "-isystem&/w/c/s/out/Release/../../buildtools/third_party/libc++abi/"
       "trunk/"
       "include",
       "--sysroot=&/w/c/s/out/Release/../../build/linux/"
       "debian_jessie_amd64-sysroot",
       "-fno-exceptions",
       "-fvisibility-inlines-hidden",
       "-xc++",
       "-resource-dir=/w/resource_dir/"});
}

TEST_CASE("Directory extraction") {
  ProjectConfig config;
  config.project_dir = "/w/c/s/";

  CompileCommandsEntry entry;
  entry.directory = "/base";
  entry.args = {"clang",
                "-I/a_absolute1",
                "--foobar",
                "-I",
                "/a_absolute2",
                "--foobar",
                "-Ia_relative1",
                "--foobar",
                "-I",
                "a_relative2",
                "--foobar",
                "-iquote/q_absolute1",
                "--foobar",
                "-iquote",
                "/q_absolute2",
                "--foobar",
                "-iquoteq_relative1",
                "--foobar",
                "-iquote",
                "q_relative2",
                "--foobar",
                "foo.cc"};
  entry.file = "foo.cc";
  Project::Entry result =
      GetCompilationEntryFromCompileCommandEntry(&config, entry);

  std::unordered_set<std::string> angle_expected{
      "&/a_absolute1", "&/a_absolute2", "&/base/a_relative1",
      "&/base/a_relative2"};
  std::unordered_set<std::string> quote_expected{
      "&/q_absolute1", "&/q_absolute2", "&/base/q_relative1",
      "&/base/q_relative2"};
  REQUIRE(config.angle_dirs == angle_expected);
  REQUIRE(config.quote_dirs == quote_expected);
}

TEST_CASE("Entry inference") {
  Project p;
  {
    Project::Entry e;
    e.args = {"arg1"};
    e.filename = "/a/b/c/d/bar.cc";
    p.entries.push_back(e);
  }
  {
    Project::Entry e;
    e.args = {"arg2"};
    e.filename = "/a/b/c/baz.cc";
    p.entries.push_back(e);
  }

  // Guess at same directory level, when there are parent directories.
  {
    optional<Project::Entry> entry =
        p.FindCompilationEntryForFile("/a/b/c/d/new.cc");
    REQUIRE(entry.has_value());
    REQUIRE(entry->args == std::vector<std::string>{"arg1"});
  }

  // Guess at same directory level, when there are child directories.
  {
    optional<Project::Entry> entry =
        p.FindCompilationEntryForFile("/a/b/c/new.cc");
    REQUIRE(entry.has_value());
    REQUIRE(entry->args == std::vector<std::string>{"arg2"});
  }

  // Guess at new directory (use the closest parent directory).
  {
    optional<Project::Entry> entry =
        p.FindCompilationEntryForFile("/a/b/c/new/new.cc");
    REQUIRE(entry.has_value());
    REQUIRE(entry->args == std::vector<std::string>{"arg2"});
  }
}

TEST_CASE("Entry inference prefers same file endings") {
  Project p;
  {
    Project::Entry e;
    e.args = {"arg1"};
    e.filename = "common/simple_browsertest.cc";
    p.entries.push_back(e);
  }
  {
    Project::Entry e;
    e.args = {"arg2"};
    e.filename = "common/simple_unittest.cc";
    p.entries.push_back(e);
  }
  {
    Project::Entry e;
    e.args = {"arg3"};
    e.filename = "common/a/simple_unittest.cc";
    p.entries.push_back(e);
  }

  // Prefer files with the same ending.
  {
    optional<Project::Entry> entry =
        p.FindCompilationEntryForFile("my_browsertest.cc");
    REQUIRE(entry.has_value());
    REQUIRE(entry->args == std::vector<std::string>{"arg1"});
  }
  {
    optional<Project::Entry> entry =
        p.FindCompilationEntryForFile("my_unittest.cc");
    REQUIRE(entry.has_value());
    REQUIRE(entry->args == std::vector<std::string>{"arg2"});
  }
  {
    optional<Project::Entry> entry =
        p.FindCompilationEntryForFile("common/my_browsertest.cc");
    REQUIRE(entry.has_value());
    REQUIRE(entry->args == std::vector<std::string>{"arg1"});
  }
  {
    optional<Project::Entry> entry =
        p.FindCompilationEntryForFile("common/my_unittest.cc");
    REQUIRE(entry.has_value());
    REQUIRE(entry->args == std::vector<std::string>{"arg2"});
  }

  // Prefer the same directory over matching file-ending.
  {
    optional<Project::Entry> entry =
        p.FindCompilationEntryForFile("common/a/foo.cc");
    REQUIRE(entry.has_value());
    REQUIRE(entry->args == std::vector<std::string>{"arg3"});
  }
}

TEST_SUITE_END();