From 47e8e72a80a89ce2f88a40c70eae1c1326c89e06 Mon Sep 17 00:00:00 2001
From: Alexander Kornienko <alexfh@google.com>
Date: Thu, 26 Jun 2014 16:32:26 +0000
Subject: [PATCH] Make the clang-tidy-diff.py test conditional on the presence
 of Python 2.7. Use the python binary from the configuration.

llvm-svn: 211789
---
 clang-tools-extra/test/Makefile                       | 1 +
 clang-tools-extra/test/clang-tidy/clang-tidy-diff.cpp | 3 ++-
 clang-tools-extra/test/lit.cfg                        | 7 +++++++
 clang-tools-extra/test/lit.site.cfg.in                | 1 +
 4 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/clang-tools-extra/test/Makefile b/clang-tools-extra/test/Makefile
index 6e39837..1dcf7cd 100644
--- a/clang-tools-extra/test/Makefile
+++ b/clang-tools-extra/test/Makefile
@@ -52,6 +52,7 @@ lit.site.cfg: FORCE
 	@$(ECHOPATH) s=@CLANG_TOOLS_SOURCE_DIR@=$(PROJ_SRC_DIR)/..=g >> lit.tmp
 	@$(ECHOPATH) s=@CLANG_TOOLS_BINARY_DIR@=$(PROJ_OBJ_DIR)/..=g >> lit.tmp
 	@$(ECHOPATH) s=@CLANG_TOOLS_DIR@=$(ToolDir)=g >> lit.tmp
+	@$(ECHOPATH) s=@PYTHON_EXECUTABLE@=$(PYTHON)=g >> lit.tmp
 	@$(ECHOPATH) s=@TARGET_TRIPLE@=$(TARGET_TRIPLE)=g >> lit.tmp
 	@sed -f lit.tmp $(PROJ_SRC_DIR)/lit.site.cfg.in > $@
 	@-rm -f lit.tmp
diff --git a/clang-tools-extra/test/clang-tidy/clang-tidy-diff.cpp b/clang-tools-extra/test/clang-tidy/clang-tidy-diff.cpp
index ab0b0f1..159431d 100644
--- a/clang-tools-extra/test/clang-tidy/clang-tidy-diff.cpp
+++ b/clang-tools-extra/test/clang-tidy/clang-tidy-diff.cpp
@@ -1,6 +1,7 @@
+// REQUIRES: python27
 // RUN: sed 's/placeholder_for_f/f/' %s > %t.cpp
 // RUN: clang-tidy -checks=-*,misc-use-override %t.cpp -- -std=c++11 | FileCheck -check-prefix=CHECK-SANITY %s
-// R_U_N: not diff -U0 %s %t.cpp | python %S/../../clang-tidy/tool/clang-tidy-diff.py -checks=-*,misc-use-override -- -std=c++11 2>&1 | FileCheck %s
+// RUN: not diff -U0 %s %t.cpp | %python %S/../../clang-tidy/tool/clang-tidy-diff.py -checks=-*,misc-use-override -- -std=c++11 2>&1 | FileCheck %s
 struct A {
   virtual void f() {}
   virtual void g() {}
diff --git a/clang-tools-extra/test/lit.cfg b/clang-tools-extra/test/lit.cfg
index 41a17cb..c58f54e 100644
--- a/clang-tools-extra/test/lit.cfg
+++ b/clang-tools-extra/test/lit.cfg
@@ -174,3 +174,10 @@ if platform.system() not in ['Windows'] or lit_config.getBashPath() != '':
 # ANSI escape sequences in non-dumb terminal
 if platform.system() not in ['Windows']:
     config.available_features.add('ansi-escape-sequences')
+
+config.substitutions.append( ('%python', config.python_executable) )
+
+import sys
+# Scripts using argparse need Python 2.7.
+if sys.version_info >= (2, 7):
+  config.available_features.add('python27')
diff --git a/clang-tools-extra/test/lit.site.cfg.in b/clang-tools-extra/test/lit.site.cfg.in
index 277f648..35f85168 100644
--- a/clang-tools-extra/test/lit.site.cfg.in
+++ b/clang-tools-extra/test/lit.site.cfg.in
@@ -7,6 +7,7 @@ config.llvm_libs_dir = "@LLVM_LIBS_DIR@"
 config.lit_tools_dir = "@LLVM_LIT_TOOLS_DIR@"
 config.clang_tools_binary_dir = "@CLANG_TOOLS_BINARY_DIR@"
 config.clang_tools_dir = "@CLANG_TOOLS_DIR@"
+config.python_executable = "@PYTHON_EXECUTABLE@"
 config.target_triple = "@TARGET_TRIPLE@"
 
 # Support substitution of the tools and libs dirs with user parameters. This is
-- 
2.7.4