Accept absolute Windows paths without leading slash in GN commands

tools/gn/label_pattern_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/gn/err.h"
 #include "tools/gn/label_pattern.h"
@@ skipping 10 matching lines @@
   const char* name;
   const char* toolchain;
 };
 
 }  // namespace
 
 TEST(LabelPattern, PatternParse) {
   SourceDir current_dir("//foo/");
   PatternCase cases[] = {
     // Missing stuff.
-    { "", false, LabelPattern::MATCH, "", "", "" },
-    { ":", false, LabelPattern::MATCH, "", "", "" },
+    {"", false, LabelPattern::MATCH, "", "", ""},
+    {":", false, LabelPattern::MATCH, "", "", ""},
     // Normal things.
-    { ":bar", true, LabelPattern::MATCH, "//foo/", "bar", "" },
-    { "//la:bar", true, LabelPattern::MATCH, "//la/", "bar", "" },
-    { "*", true, LabelPattern::RECURSIVE_DIRECTORY, "", "", "" },
-    { ":*", true, LabelPattern::DIRECTORY, "//foo/", "", "" },
-    { "la:*", true, LabelPattern::DIRECTORY, "//foo/la/", "", "" },
-    { "la/*:*", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/la/", "", "" },
-    { "//la:*", true, LabelPattern::DIRECTORY, "//la/", "", "" },
-    { "./*", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/", "", "" },
-    { "foo/*", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/foo/", "", "" },
-    { "//l/*", true, LabelPattern::RECURSIVE_DIRECTORY, "//l/", "", "" },
+    {":bar", true, LabelPattern::MATCH, "//foo/", "bar", ""},
+    {"//la:bar", true, LabelPattern::MATCH, "//la/", "bar", ""},
+    {"*", true, LabelPattern::RECURSIVE_DIRECTORY, "", "", ""},
+    {":*", true, LabelPattern::DIRECTORY, "//foo/", "", ""},
+    {"la:*", true, LabelPattern::DIRECTORY, "//foo/la/", "", ""},
+    {"la/*:*", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/la/", "", ""},
+    {"//la:*", true, LabelPattern::DIRECTORY, "//la/", "", ""},
+    {"./*", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/", "", ""},
+    {"foo/*", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/foo/", "", ""},
+    {"//l/*", true, LabelPattern::RECURSIVE_DIRECTORY, "//l/", "", ""},
     // Toolchains.
-    { "//foo()", true, LabelPattern::MATCH, "//foo/", "foo", "" },
-    { "//foo(//bar)", true, LabelPattern::MATCH, "//foo/", "foo", "//bar:bar" },
-    { "//foo:*(//bar)", true, LabelPattern::DIRECTORY, "//foo/", "",
-      "//bar:bar" },
-    { "//foo/*(//bar)", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/", "",
-      "//bar:bar" },
+    {"//foo()", true, LabelPattern::MATCH, "//foo/", "foo", ""},
+    {"//foo(//bar)", true, LabelPattern::MATCH, "//foo/", "foo", "//bar:bar"},
+    {"//foo:*(//bar)", true, LabelPattern::DIRECTORY, "//foo/", "",
+     "//bar:bar"},
+    {"//foo/*(//bar)", true, LabelPattern::RECURSIVE_DIRECTORY, "//foo/", "",
+     "//bar:bar"},
     // Wildcards in invalid places.
-    { "*foo*:bar", false, LabelPattern::MATCH, "", "", "" },
-    { "foo*:*bar", false, LabelPattern::MATCH, "", "", "" },
-    { "*foo:bar", false, LabelPattern::MATCH, "", "", "" },
-    { "foo:bar*", false, LabelPattern::MATCH, "", "", "" },
-    { "*:*", true, LabelPattern::RECURSIVE_DIRECTORY, "", "", "" },
+    {"*foo*:bar", false, LabelPattern::MATCH, "", "", ""},
+    {"foo*:*bar", false, LabelPattern::MATCH, "", "", ""},
+    {"*foo:bar", false, LabelPattern::MATCH, "", "", ""},
+    {"foo:bar*", false, LabelPattern::MATCH, "", "", ""},
+    {"*:*", true, LabelPattern::RECURSIVE_DIRECTORY, "", "", ""},
     // Invalid toolchain stuff.
-    { "//foo(//foo/bar:*)", false, LabelPattern::MATCH, "", "", "" },
-    { "//foo/*(*)", false, LabelPattern::MATCH, "", "", "" },
-    { "//foo(//bar", false, LabelPattern::MATCH, "", "", "" },
+    {"//foo(//foo/bar:*)", false, LabelPattern::MATCH, "", "", ""},
+    {"//foo/*(*)", false, LabelPattern::MATCH, "", "", ""},
+    {"//foo(//bar", false, LabelPattern::MATCH, "", "", ""},
+    // Absolute paths.
+    {"/la/*", true, LabelPattern::RECURSIVE_DIRECTORY, "/la/", "", ""},
+    {"/la:bar", true, LabelPattern::MATCH, "/la/", "bar", ""},
+#if defined(OS_WIN)
+    {"/C:/la/*", true, LabelPattern::RECURSIVE_DIRECTORY, "/C:/la/", "", ""},
+    {"C:/la/*", true, LabelPattern::RECURSIVE_DIRECTORY, "/C:/la/", "", ""},
+    {"/C:/la:bar", true, LabelPattern::MATCH, "/C:/la/", "bar", ""},
+    {"C:/la:bar", true, LabelPattern::MATCH, "/C:/la/", "bar", ""},
+    {"C:foo", true, LabelPattern::MATCH, "//foo/C/", "foo", ""},
+#endif
   };
 
   for (size_t i = 0; i < arraysize(cases); i++) {
     const PatternCase& cur = cases[i];
     Err err;
     LabelPattern result =
         LabelPattern::GetPattern(current_dir, Value(nullptr, cur.input), &err);
 
     EXPECT_EQ(cur.success, !err.has_error()) << i << " " << cur.input;
     EXPECT_EQ(cur.type, result.type()) << i << " " << cur.input;
     EXPECT_EQ(cur.dir, result.dir().value()) << i << " " << cur.input;
     EXPECT_EQ(cur.name, result.name()) << i << " " << cur.input;
     EXPECT_EQ(cur.toolchain, result.toolchain().GetUserVisibleName(false))
         << i << " " << cur.input;
   }
 }