1 files changed, 63 insertions, 41 deletions

diff --git a/tools/clang-check/ClangCheck.cpp b/tools/clang-check/ClangCheck.cpp
index d68e282949c8..9e58077b5a0e 100644
--- a/tools/clang-check/ClangCheck.cpp
+++ b/tools/clang-check/ClangCheck.cpp
@@ -1,4 +1,4 @@
-//===- examples/Tooling/ClangCheck.cpp - Clang check tool -----------------===//
+//===- tools/clang-check/ClangCheck.cpp - Clang check tool ----------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -10,57 +10,79 @@
 //  This file implements a clang-check tool that runs the
 //  clang::SyntaxOnlyAction over a number of translation units.
 //
-//  Usage:
-//  clang-check <cmake-output-dir> <file1> <file2> ...
-//
-//  Where <cmake-output-dir> is a CMake build directory in which a file named
-//  compile_commands.json exists (enable -DCMAKE_EXPORT_COMPILE_COMMANDS in
-//  CMake to get this output).
-//
-//  <file1> ... specify the paths of files in the CMake source tree. This  path
-//  is looked up in the compile command database. If the path of a file is
-//  absolute, it needs to point into CMake's source tree. If the path is
-//  relative, the current working directory needs to be in the CMake source
-//  tree and the file must be in a subdirectory of the current working
-//  directory. "./" prefixes in the relative files will be automatically
-//  removed, but the rest of a relative path must be a suffix of a path in
-//  the compile command line database.
-//
-//  For example, to use clang-check on all files in a subtree of the source
-//  tree, use:
-//
-//    /path/in/subtree $ find . -name '*.cpp'| xargs clang-check /path/to/source
+//  This tool uses the Clang Tooling infrastructure, see
+//    http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html
+//  for details on setting it up with LLVM source tree.
 //
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/CommandLine.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/Driver/OptTable.h"
+#include "clang/Driver/Options.h"
+#include "clang/Frontend/ASTConsumers.h"
 #include "clang/Frontend/FrontendActions.h"
-#include "clang/Tooling/CompilationDatabase.h"
+#include "clang/Tooling/CommandLineClangTool.h"
 #include "clang/Tooling/Tooling.h"
 
+using namespace clang::driver;
 using namespace clang::tooling;
 using namespace llvm;
 
-cl::opt<std::string> BuildPath(
-  cl::Positional,
-  cl::desc("<build-path>"));
+static const char *MoreHelpText =
+    "\tFor example, to run clang-check on all files in a subtree of the\n"
+    "\tsource tree, use:\n"
+    "\n"
+    "\t  find path/in/subtree -name '*.cpp'|xargs clang-check\n"
+    "\n"
+    "\tor using a specific build path:\n"
+    "\n"
+    "\t  find path/in/subtree -name '*.cpp'|xargs clang-check -p build/path\n"
+    "\n"
+    "\tNote, that path/in/subtree and current directory should follow the\n"
+    "\trules described above.\n"
+    "\n";
 
-cl::list<std::string> SourcePaths(
-  cl::Positional,
-  cl::desc("<source0> [... <sourceN>]"),
-  cl::OneOrMore);
+namespace {
+class ActionFactory {
+public:
+  ActionFactory()
+    : Options(createDriverOptTable()),
+      ASTDump(
+        "ast-dump",
+        cl::desc(Options->getOptionHelpText(options::OPT_ast_dump))),
+      ASTList(
+        "ast-list",
+        cl::desc(Options->getOptionHelpText(options::OPT_ast_list))),
+      ASTPrint(
+        "ast-print",
+        cl::desc(Options->getOptionHelpText(options::OPT_ast_print))),
+      ASTDumpFilter(
+        "ast-dump-filter",
+        cl::desc(Options->getOptionHelpText(options::OPT_ast_dump_filter))) {}
 
-int main(int argc, const char **argv) {
-  llvm::OwningPtr<CompilationDatabase> Compilations(
-    FixedCompilationDatabase::loadFromCommandLine(argc, argv));
-  cl::ParseCommandLineOptions(argc, argv);
-  if (!Compilations) {
-    std::string ErrorMessage;
-    Compilations.reset(CompilationDatabase::loadFromDirectory(BuildPath,
-                                                              ErrorMessage));
-    if (!Compilations)
-      llvm::report_fatal_error(ErrorMessage);
+  clang::ASTConsumer *newASTConsumer() {
+    if (ASTList)
+      return clang::CreateASTDeclNodeLister();
+    if (ASTDump)
+      return clang::CreateASTDumper(ASTDumpFilter);
+    if (ASTPrint)
+      return clang::CreateASTPrinter(&llvm::outs(), ASTDumpFilter);
+    return new clang::ASTConsumer();
   }
-  ClangTool Tool(*Compilations, SourcePaths);
-  return Tool.run(newFrontendActionFactory<clang::SyntaxOnlyAction>());
+private:
+  OwningPtr<OptTable> Options;
+  cl::opt<bool> ASTDump;
+  cl::opt<bool> ASTList;
+  cl::opt<bool> ASTPrint;
+  cl::opt<std::string> ASTDumpFilter;
+};
+}
+
+int main(int argc, const char **argv) {
+  ActionFactory Factory;
+  CommandLineClangTool Tool;
+  cl::extrahelp MoreHelp(MoreHelpText);
+  Tool.initialize(argc, argv);
+  return Tool.run(newFrontendActionFactory(&Factory));
 }