From 469bbc002a8fa89fd3616a13fcfdf4e38acfc926 Mon Sep 17 00:00:00 2001
From: John Thompson <John.Thompson.JTSoftware@gmail.com>
Date: Thu, 12 Feb 2015 16:22:09 +0000
Subject: Added support for multiple header list files, as a precursor for when
 we need to load multiple module maps.

llvm-svn: 228935
---
 clang-tools-extra/docs/ModularizeUsage.rst         |  3 ++-
 clang-tools-extra/modularize/Modularize.cpp        | 22 +++++++++++++---------
 .../test/modularize/NoProblemsList.modularize      |  2 ++
 3 files changed, 17 insertions(+), 10 deletions(-)
 create mode 100644 clang-tools-extra/test/modularize/NoProblemsList.modularize

diff --git a/clang-tools-extra/docs/ModularizeUsage.rst b/clang-tools-extra/docs/ModularizeUsage.rst
index 6ac5d53d0bd..90b2d6a8d0f 100644
--- a/clang-tools-extra/docs/ModularizeUsage.rst
+++ b/clang-tools-extra/docs/ModularizeUsage.rst
@@ -2,7 +2,8 @@
 Modularize Usage
 ================
 
-``modularize [<modularize-options>] <include-files-list> [<front-end-options>...]``
+``modularize [<modularize-options>] <include-files-list>[,<include-files-list>]*
+[<front-end-options>...]``
 
 ``<modularize-options>`` is a place-holder for options
 specific to modularize, which are described below in
diff --git a/clang-tools-extra/modularize/Modularize.cpp b/clang-tools-extra/modularize/Modularize.cpp
index 3504b75560b..babade8f999 100644
--- a/clang-tools-extra/modularize/Modularize.cpp
+++ b/clang-tools-extra/modularize/Modularize.cpp
@@ -178,9 +178,10 @@ using namespace llvm::opt;
 using namespace Modularize;
 
 // Option to specify a file name for a list of header files to check.
-cl::opt<std::string>
-ListFileName(cl::Positional,
-             cl::desc("<name of file containing list of headers 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);
 
 // Collect all other arguments, which will be passed to the front end.
 cl::list<std::string>
@@ -700,7 +701,7 @@ int main(int Argc, const char **Argv) {
   cl::ParseCommandLineOptions(Argc, Argv, "modularize.\n");
 
   // No go if we have no header list file.
-  if (ListFileName.size() == 0) {
+  if (ListFileNames.size() == 0) {
     cl::PrintHelpMessage();
     return 1;
   }
@@ -708,11 +709,14 @@ int main(int Argc, const char **Argv) {
   // Get header file names and dependencies.
   SmallVector<std::string, 32> Headers;
   DependencyMap Dependencies;
-  if (std::error_code EC = getHeaderFileNames(Headers, Dependencies,
-                                              ListFileName, HeaderPrefix)) {
-    errs() << Argv[0] << ": error: Unable to get header list '" << ListFileName
-           << "': " << EC.message() << '\n';
-    return 1;
+  typedef std::vector<std::string>::iterator Iter;
+  for (Iter I = ListFileNames.begin(), E = ListFileNames.end(); I != E; ++I) {
+    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;
+    }
   }
 
   // If we are in assistant mode, output the module map and quit.
diff --git a/clang-tools-extra/test/modularize/NoProblemsList.modularize b/clang-tools-extra/test/modularize/NoProblemsList.modularize
new file mode 100644
index 00000000000..ec5f4c9e5fc
--- /dev/null
+++ b/clang-tools-extra/test/modularize/NoProblemsList.modularize
@@ -0,0 +1,2 @@
+# RUN: modularize NoProblems.modularize,NoProblemsAnonymous.modularize -x c++
+# RUN: modularize -prefix=%p NoProblems.modularize,NoProblemsAnonymous.modularize -x c++
-- 
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