Make gtest output more silent, ninja issue #528.

This is just a proof-of-concept. The terminal printing logic should be
extracted from src/build.cc and then reused here.

configure.py

@@ -331,9 +331,6 @@ def has_re2c():
     objs += n.build(built('gtest-all' + objext), 'cxx',
                     os.path.join(path, 'src', 'gtest-all.cc'),
                     variables=[('cflags', gtest_cflags)])
-    objs += n.build(built('gtest_main' + objext), 'cxx',
-                    os.path.join(path, 'src', 'gtest_main.cc'),
-                    variables=[('cflags', gtest_cflags)])
 
     test_cflags.append('-I%s' % os.path.join(path, 'include'))
 else:
@@ -353,6 +350,7 @@ def has_re2c():
              'graph_test',
              'lexer_test',
              'manifest_parser_test',
+             'ninja_test',
              'state_test',
              'subprocess_test',
              'test',

src/ninja_test.cc

@@ -0,0 +1,54 @@
+#include "gtest/gtest.h"
+
+/// A test result printer that's less wordy than gtest's default.
+class LaconicPrinter : public testing::EmptyTestEventListener {
+ public:
+  LaconicPrinter() : have_blank_line_(false), smart_terminal_(true) {}
+
+  virtual void OnTestStart(const testing::TestInfo& test_info) {
+    printf("\r%s.%s starting.", test_info.test_case_name(), test_info.name());
+    printf("\x1B[K");  // Clear to end of line.
+    fflush(stdout);
+    have_blank_line_ = false;
+  }
+
+  virtual void OnTestPartResult(
+      const testing::TestPartResult& test_part_result) {
+    if (!test_part_result.failed())
+      return;
+    if (!have_blank_line_ && smart_terminal_)
+      printf("\n");
+    printf("*** Failure in %s:%d\n%s\n",
+           test_part_result.file_name(),
+           test_part_result.line_number(),
+           test_part_result.summary());
+    have_blank_line_ = true;
+  }
+
+  virtual void OnTestEnd(const testing::TestInfo& test_info) {
+    printf("\r%s.%s ending.", test_info.test_case_name(), test_info.name());
+    printf("\x1B[K");  // Clear to end of line.
+    fflush(stdout);
+    have_blank_line_ = false;
+  }
+
+  virtual void OnTestProgramEnd(const testing::UnitTest& unit_test) {
+    if (!have_blank_line_ && smart_terminal_)
+      printf("\n");
+  }
+
+ private:
+  bool have_blank_line_;
+  bool smart_terminal_;
+};
+
+int main(int argc, char **argv) {
+  testing::InitGoogleTest(&argc, argv);
+
+  testing::TestEventListeners& listeners =
+      testing::UnitTest::GetInstance()->listeners();
+  delete listeners.Release(listeners.default_result_printer());
+  listeners.Append(new LaconicPrinter);
+
+  return RUN_ALL_TESTS();
+}