Moved header list loading to new class. This is staging for adding module map loading and checking support.

llvm-svn: 229108

1 files changed, 19 insertions, 93 deletions

diff --git a/clang-tools-extra/modularize/Modularize.cpp b/clang-tools-extra/modularize/Modularize.cpp
index 078cc5437d3..9d91557fb0d 100644
--- a/clang-tools-extra/modularize/Modularize.cpp
+++ b/clang-tools-extra/modularize/Modularize.cpp
@@ -144,6 +144,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "Modularize.h"
+#include "ModularizeUtilities.h"
 #include "PreprocessorTracker.h"
 #include "clang/AST/ASTConsumer.h"
 #include "clang/AST/ASTContext.h"
@@ -178,10 +179,10 @@ using namespace llvm::opt;
 using namespace Modularize;
 
 // Option to specify a file name for a list of header files to check.
-cl::list<std::string>
-ListFileNames(cl::Positional, cl::value_desc("list"),
-              cl::desc("<list of one or more header list files>"),
-              cl::CommaSeparated);
+cl::list<std::string>

+ListFileNames(cl::Positional, cl::value_desc("list"),

+              cl::desc("<list of one or more header list files>"),

+              cl::CommaSeparated);

 
 // Collect all other arguments, which will be passed to the front end.
 cl::list<std::string>
@@ -224,80 +225,6 @@ const char *Argv0;
 // Save the command line for comments.
 std::string CommandLine;
 
-// Read the header list file and collect the header file names and
-// optional dependencies.
-std::error_code
-getHeaderFileNames(SmallVectorImpl<std::string> &HeaderFileNames,
-                   DependencyMap &Dependencies, StringRef ListFileName,
-                   StringRef HeaderPrefix) {
-  // By default, use the path component of the list file name.
-  SmallString<256> HeaderDirectory(ListFileName);
-  sys::path::remove_filename(HeaderDirectory);
-  SmallString<256> CurrentDirectory;
-  sys::fs::current_path(CurrentDirectory);
-
-  // Get the prefix if we have one.
-  if (HeaderPrefix.size() != 0)
-    HeaderDirectory = HeaderPrefix;
-
-  // Read the header list file into a buffer.
-  ErrorOr<std::unique_ptr<MemoryBuffer>> listBuffer =
-      MemoryBuffer::getFile(ListFileName);
-  if (std::error_code EC = listBuffer.getError())
-    return EC;
-
-  // Parse the header list into strings.
-  SmallVector<StringRef, 32> Strings;
-  listBuffer.get()->getBuffer().split(Strings, "\n", -1, false);
-
-  // Collect the header file names from the string list.
-  for (SmallVectorImpl<StringRef>::iterator I = Strings.begin(),
-                                            E = Strings.end();
-       I != E; ++I) {
-    StringRef Line = I->trim();
-    // Ignore comments and empty lines.
-    if (Line.empty() || (Line[0] == '#'))
-      continue;
-    std::pair<StringRef, StringRef> TargetAndDependents = Line.split(':');
-    SmallString<256> HeaderFileName;
-    // Prepend header file name prefix if it's not absolute.
-    if (sys::path::is_absolute(TargetAndDependents.first))
-      llvm::sys::path::native(TargetAndDependents.first, HeaderFileName);
-    else {
-      if (HeaderDirectory.size() != 0)
-        HeaderFileName = HeaderDirectory;
-      else
-        HeaderFileName = CurrentDirectory;
-      sys::path::append(HeaderFileName, TargetAndDependents.first);
-      sys::path::native(HeaderFileName);
-    }
-    // Handle optional dependencies.
-    DependentsVector Dependents;
-    SmallVector<StringRef, 4> DependentsList;
-    TargetAndDependents.second.split(DependentsList, " ", -1, false);
-    int Count = DependentsList.size();
-    for (int Index = 0; Index < Count; ++Index) {
-      SmallString<256> Dependent;
-      if (sys::path::is_absolute(DependentsList[Index]))
-        Dependent = DependentsList[Index];
-      else {
-        if (HeaderDirectory.size() != 0)
-          Dependent = HeaderDirectory;
-        else
-          Dependent = CurrentDirectory;
-        sys::path::append(Dependent, DependentsList[Index]);
-      }
-      sys::path::native(Dependent);
-      Dependents.push_back(Dependent.str());
-    }
-    // Save the resulting header file path and dependencies.
-    HeaderFileNames.push_back(HeaderFileName.str());
-    Dependencies[HeaderFileName.str()] = Dependents;
-  }
-
-  return std::error_code();
-}
-
 // Helper function for finding the input file in an arguments list.
 std::string findInputFile(const CommandLineArguments &CLArgs) {
   std::unique_ptr<OptTable> Opts(createDriverOptTable());
@@ -706,22 +633,20 @@ int main(int Argc, const char **Argv) {
     return 1;
   }
 
+  std::unique_ptr<ModularizeUtilities> ModUtil;
+  
+  ModUtil.reset(
+    ModularizeUtilities::createModularizeUtilities(
+      ListFileNames, HeaderPrefix));
+
   // Get header file names and dependencies.
-  SmallVector<std::string, 32> Headers;
-  DependencyMap Dependencies;
-  for (auto I : ListFileNames) {
-    if (std::error_code EC =
-            getHeaderFileNames(Headers, Dependencies, I, HeaderPrefix)) {
-      errs() << Argv[0] << ": error: Unable to get header list '" << I
-             << "': " << EC.message() << '\n';
-      return 1;
-    }
-  }
+  ModUtil->loadAllHeaderListsAndDependencies();
+
 
   // If we are in assistant mode, output the module map and quit.
   if (ModuleMapPath.length() != 0) {
-    if (!createModuleMap(ModuleMapPath, Headers, Dependencies, HeaderPrefix,
-                         RootModule))
+    if (!createModuleMap(ModuleMapPath, ModUtil->HeaderFileNames,
+                         ModUtil->Dependencies, HeaderPrefix, RootModule))
       return 1; // Failed.
     return 0;   // Success - Skip checks in assistant mode.
   }
@@ -735,12 +660,13 @@ int main(int Argc, const char **Argv) {
 
   // Create preprocessor tracker, to watch for macro and conditional problems.
   std::unique_ptr<PreprocessorTracker> PPTracker(
-    PreprocessorTracker::create(Headers, BlockCheckHeaderListOnly));
+    PreprocessorTracker::create(ModUtil->HeaderFileNames,
+                                BlockCheckHeaderListOnly));
 
   // Parse all of the headers, detecting duplicates.
   EntityMap Entities;
-  ClangTool Tool(*Compilations, Headers);
-  Tool.appendArgumentsAdjuster(getAddDependenciesAdjuster(Dependencies));
+  ClangTool Tool(*Compilations, ModUtil->HeaderFileNames);
+  Tool.appendArgumentsAdjuster(getAddDependenciesAdjuster(ModUtil->Dependencies));
   int HadErrors = 0;
   ModularizeFrontendActionFactory Factory(Entities, *PPTracker, HadErrors);
   HadErrors |= Tool.run(&Factory);