1 //===- llvm/unittest/Support/CommandLineTest.cpp - CommandLine tests ------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/Support/CommandLine.h"
11 #include "llvm/ADT/STLExtras.h"
12 #include "llvm/ADT/SmallString.h"
13 #include "llvm/Config/config.h"
14 #include "llvm/Support/FileSystem.h"
15 #include "llvm/Support/Path.h"
16 #include "llvm/Support/Program.h"
17 #include "llvm/Support/StringSaver.h"
18 #include "gtest/gtest.h"
19 #include <fstream>
20 #include <stdlib.h>
21 #include <string>
22 
23 using namespace llvm;
24 
25 namespace {
26 
27 class TempEnvVar {
28  public:
29   TempEnvVar(const char *name, const char *value)
30       : name(name) {
31     const char *old_value = getenv(name);
32     EXPECT_EQ(nullptr, old_value) << old_value;
33 #if HAVE_SETENV
34     setenv(name, value, true);
35 #else
36 #   define SKIP_ENVIRONMENT_TESTS
37 #endif
38   }
39 
40   ~TempEnvVar() {
41 #if HAVE_SETENV
42     // Assume setenv and unsetenv come together.
43     unsetenv(name);
44 #else
45     (void)name; // Suppress -Wunused-private-field.
46 #endif
47   }
48 
49  private:
50   const char *const name;
51 };
52 
53 template <typename T>
54 class StackOption : public cl::opt<T> {
55   typedef cl::opt<T> Base;
56 public:
57   // One option...
58   template<class M0t>
59   explicit StackOption(const M0t &M0) : Base(M0) {}
60 
61   // Two options...
62   template<class M0t, class M1t>
63   StackOption(const M0t &M0, const M1t &M1) : Base(M0, M1) {}
64 
65   // Three options...
66   template<class M0t, class M1t, class M2t>
67   StackOption(const M0t &M0, const M1t &M1, const M2t &M2) : Base(M0, M1, M2) {}
68 
69   // Four options...
70   template<class M0t, class M1t, class M2t, class M3t>
71   StackOption(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
72     : Base(M0, M1, M2, M3) {}
73 
74   ~StackOption() override { this->removeArgument(); }
75 
76   template <class DT> StackOption<T> &operator=(const DT &V) {
77     this->setValue(V);
78     return *this;
79   }
80 };
81 
82 class StackSubCommand : public cl::SubCommand {
83 public:
84   StackSubCommand(StringRef Name,
85                   StringRef Description = StringRef())
86       : SubCommand(Name, Description) {}
87 
88   StackSubCommand() : SubCommand() {}
89 
90   ~StackSubCommand() { unregisterSubCommand(); }
91 };
92 
93 
94 cl::OptionCategory TestCategory("Test Options", "Description");
95 TEST(CommandLineTest, ModifyExisitingOption) {
96   StackOption<int> TestOption("test-option", cl::desc("old description"));
97 
98   const char Description[] = "New description";
99   const char ArgString[] = "new-test-option";
100   const char ValueString[] = "Integer";
101 
102   StringMap<cl::Option *> &Map =
103       cl::getRegisteredOptions(*cl::TopLevelSubCommand);
104 
105   ASSERT_TRUE(Map.count("test-option") == 1) <<
106     "Could not find option in map.";
107 
108   cl::Option *Retrieved = Map["test-option"];
109   ASSERT_EQ(&TestOption, Retrieved) << "Retrieved wrong option.";
110 
111   ASSERT_EQ(&cl::GeneralCategory,Retrieved->Category) <<
112     "Incorrect default option category.";
113 
114   Retrieved->setCategory(TestCategory);
115   ASSERT_EQ(&TestCategory,Retrieved->Category) <<
116     "Failed to modify option's option category.";
117 
118   Retrieved->setDescription(Description);
119   ASSERT_STREQ(Retrieved->HelpStr.data(), Description)
120       << "Changing option description failed.";
121 
122   Retrieved->setArgStr(ArgString);
123   ASSERT_STREQ(ArgString, Retrieved->ArgStr.data())
124       << "Failed to modify option's Argument string.";
125 
126   Retrieved->setValueStr(ValueString);
127   ASSERT_STREQ(Retrieved->ValueStr.data(), ValueString)
128       << "Failed to modify option's Value string.";
129 
130   Retrieved->setHiddenFlag(cl::Hidden);
131   ASSERT_EQ(cl::Hidden, TestOption.getOptionHiddenFlag()) <<
132     "Failed to modify option's hidden flag.";
133 }
134 #ifndef SKIP_ENVIRONMENT_TESTS
135 
136 const char test_env_var[] = "LLVM_TEST_COMMAND_LINE_FLAGS";
137 
138 cl::opt<std::string> EnvironmentTestOption("env-test-opt");
139 TEST(CommandLineTest, ParseEnvironment) {
140   TempEnvVar TEV(test_env_var, "-env-test-opt=hello");
141   EXPECT_EQ("", EnvironmentTestOption);
142   cl::ParseEnvironmentOptions("CommandLineTest", test_env_var);
143   EXPECT_EQ("hello", EnvironmentTestOption);
144 }
145 
146 // This test used to make valgrind complain
147 // ("Conditional jump or move depends on uninitialised value(s)")
148 //
149 // Warning: Do not run any tests after this one that try to gain access to
150 // registered command line options because this will likely result in a
151 // SEGFAULT. This can occur because the cl::opt in the test below is declared
152 // on the stack which will be destroyed after the test completes but the
153 // command line system will still hold a pointer to a deallocated cl::Option.
154 TEST(CommandLineTest, ParseEnvironmentToLocalVar) {
155   // Put cl::opt on stack to check for proper initialization of fields.
156   StackOption<std::string> EnvironmentTestOptionLocal("env-test-opt-local");
157   TempEnvVar TEV(test_env_var, "-env-test-opt-local=hello-local");
158   EXPECT_EQ("", EnvironmentTestOptionLocal);
159   cl::ParseEnvironmentOptions("CommandLineTest", test_env_var);
160   EXPECT_EQ("hello-local", EnvironmentTestOptionLocal);
161 }
162 
163 #endif  // SKIP_ENVIRONMENT_TESTS
164 
165 TEST(CommandLineTest, UseOptionCategory) {
166   StackOption<int> TestOption2("test-option", cl::cat(TestCategory));
167 
168   ASSERT_EQ(&TestCategory,TestOption2.Category) << "Failed to assign Option "
169                                                   "Category.";
170 }
171 
172 typedef void ParserFunction(StringRef Source, StringSaver &Saver,
173                             SmallVectorImpl<const char *> &NewArgv,
174                             bool MarkEOLs);
175 
176 void testCommandLineTokenizer(ParserFunction *parse, StringRef Input,
177                               const char *const Output[], size_t OutputSize) {
178   SmallVector<const char *, 0> Actual;
179   BumpPtrAllocator A;
180   StringSaver Saver(A);
181   parse(Input, Saver, Actual, /*MarkEOLs=*/false);
182   EXPECT_EQ(OutputSize, Actual.size());
183   for (unsigned I = 0, E = Actual.size(); I != E; ++I) {
184     if (I < OutputSize) {
185       EXPECT_STREQ(Output[I], Actual[I]);
186     }
187   }
188 }
189 
190 TEST(CommandLineTest, TokenizeGNUCommandLine) {
191   const char Input[] =
192       "foo\\ bar \"foo bar\" \'foo bar\' 'foo\\\\bar' -DFOO=bar\\(\\) "
193       "foo\"bar\"baz C:\\\\src\\\\foo.cpp \"C:\\src\\foo.cpp\"";
194   const char *const Output[] = {
195       "foo bar",     "foo bar",   "foo bar",          "foo\\bar",
196       "-DFOO=bar()", "foobarbaz", "C:\\src\\foo.cpp", "C:srcfoo.cpp"};
197   testCommandLineTokenizer(cl::TokenizeGNUCommandLine, Input, Output,
198                            array_lengthof(Output));
199 }
200 
201 TEST(CommandLineTest, TokenizeWindowsCommandLine) {
202   const char Input[] = "a\\b c\\\\d e\\\\\"f g\" h\\\"i j\\\\\\\"k \"lmn\" o pqr "
203                       "\"st \\\"u\" \\v";
204   const char *const Output[] = { "a\\b", "c\\\\d", "e\\f g", "h\"i", "j\\\"k",
205                                  "lmn", "o", "pqr", "st \"u", "\\v" };
206   testCommandLineTokenizer(cl::TokenizeWindowsCommandLine, Input, Output,
207                            array_lengthof(Output));
208 }
209 
210 TEST(CommandLineTest, AliasesWithArguments) {
211   static const size_t ARGC = 3;
212   const char *const Inputs[][ARGC] = {
213     { "-tool", "-actual=x", "-extra" },
214     { "-tool", "-actual", "x" },
215     { "-tool", "-alias=x", "-extra" },
216     { "-tool", "-alias", "x" }
217   };
218 
219   for (size_t i = 0, e = array_lengthof(Inputs); i < e; ++i) {
220     StackOption<std::string> Actual("actual");
221     StackOption<bool> Extra("extra");
222     StackOption<std::string> Input(cl::Positional);
223 
224     cl::alias Alias("alias", llvm::cl::aliasopt(Actual));
225 
226     cl::ParseCommandLineOptions(ARGC, Inputs[i]);
227     EXPECT_EQ("x", Actual);
228     EXPECT_EQ(0, Input.getNumOccurrences());
229 
230     Alias.removeArgument();
231   }
232 }
233 
234 void testAliasRequired(int argc, const char *const *argv) {
235   StackOption<std::string> Option("option", cl::Required);
236   cl::alias Alias("o", llvm::cl::aliasopt(Option));
237 
238   cl::ParseCommandLineOptions(argc, argv);
239   EXPECT_EQ("x", Option);
240   EXPECT_EQ(1, Option.getNumOccurrences());
241 
242   Alias.removeArgument();
243 }
244 
245 TEST(CommandLineTest, AliasRequired) {
246   const char *opts1[] = { "-tool", "-option=x" };
247   const char *opts2[] = { "-tool", "-o", "x" };
248   testAliasRequired(array_lengthof(opts1), opts1);
249   testAliasRequired(array_lengthof(opts2), opts2);
250 }
251 
252 TEST(CommandLineTest, HideUnrelatedOptions) {
253   StackOption<int> TestOption1("hide-option-1");
254   StackOption<int> TestOption2("hide-option-2", cl::cat(TestCategory));
255 
256   cl::HideUnrelatedOptions(TestCategory);
257 
258   ASSERT_EQ(cl::ReallyHidden, TestOption1.getOptionHiddenFlag())
259       << "Failed to hide extra option.";
260   ASSERT_EQ(cl::NotHidden, TestOption2.getOptionHiddenFlag())
261       << "Hid extra option that should be visable.";
262 
263   StringMap<cl::Option *> &Map =
264       cl::getRegisteredOptions(*cl::TopLevelSubCommand);
265   ASSERT_EQ(cl::NotHidden, Map["help"]->getOptionHiddenFlag())
266       << "Hid default option that should be visable.";
267 }
268 
269 cl::OptionCategory TestCategory2("Test Options set 2", "Description");
270 
271 TEST(CommandLineTest, HideUnrelatedOptionsMulti) {
272   StackOption<int> TestOption1("multi-hide-option-1");
273   StackOption<int> TestOption2("multi-hide-option-2", cl::cat(TestCategory));
274   StackOption<int> TestOption3("multi-hide-option-3", cl::cat(TestCategory2));
275 
276   const cl::OptionCategory *VisibleCategories[] = {&TestCategory,
277                                                    &TestCategory2};
278 
279   cl::HideUnrelatedOptions(makeArrayRef(VisibleCategories));
280 
281   ASSERT_EQ(cl::ReallyHidden, TestOption1.getOptionHiddenFlag())
282       << "Failed to hide extra option.";
283   ASSERT_EQ(cl::NotHidden, TestOption2.getOptionHiddenFlag())
284       << "Hid extra option that should be visable.";
285   ASSERT_EQ(cl::NotHidden, TestOption3.getOptionHiddenFlag())
286       << "Hid extra option that should be visable.";
287 
288   StringMap<cl::Option *> &Map =
289       cl::getRegisteredOptions(*cl::TopLevelSubCommand);
290   ASSERT_EQ(cl::NotHidden, Map["help"]->getOptionHiddenFlag())
291       << "Hid default option that should be visable.";
292 }
293 
294 TEST(CommandLineTest, SetValueInSubcategories) {
295   cl::ResetCommandLineParser();
296 
297   StackSubCommand SC1("sc1", "First subcommand");
298   StackSubCommand SC2("sc2", "Second subcommand");
299 
300   StackOption<bool> TopLevelOpt("top-level", cl::init(false));
301   StackOption<bool> SC1Opt("sc1", cl::sub(SC1), cl::init(false));
302   StackOption<bool> SC2Opt("sc2", cl::sub(SC2), cl::init(false));
303 
304   EXPECT_FALSE(TopLevelOpt);
305   EXPECT_FALSE(SC1Opt);
306   EXPECT_FALSE(SC2Opt);
307   const char *args[] = {"prog", "-top-level"};
308   EXPECT_TRUE(
309       cl::ParseCommandLineOptions(2, args, StringRef(), &llvm::nulls()));
310   EXPECT_TRUE(TopLevelOpt);
311   EXPECT_FALSE(SC1Opt);
312   EXPECT_FALSE(SC2Opt);
313 
314   TopLevelOpt = false;
315 
316   cl::ResetAllOptionOccurrences();
317   EXPECT_FALSE(TopLevelOpt);
318   EXPECT_FALSE(SC1Opt);
319   EXPECT_FALSE(SC2Opt);
320   const char *args2[] = {"prog", "sc1", "-sc1"};
321   EXPECT_TRUE(
322       cl::ParseCommandLineOptions(3, args2, StringRef(), &llvm::nulls()));
323   EXPECT_FALSE(TopLevelOpt);
324   EXPECT_TRUE(SC1Opt);
325   EXPECT_FALSE(SC2Opt);
326 
327   SC1Opt = false;
328 
329   cl::ResetAllOptionOccurrences();
330   EXPECT_FALSE(TopLevelOpt);
331   EXPECT_FALSE(SC1Opt);
332   EXPECT_FALSE(SC2Opt);
333   const char *args3[] = {"prog", "sc2", "-sc2"};
334   EXPECT_TRUE(
335       cl::ParseCommandLineOptions(3, args3, StringRef(), &llvm::nulls()));
336   EXPECT_FALSE(TopLevelOpt);
337   EXPECT_FALSE(SC1Opt);
338   EXPECT_TRUE(SC2Opt);
339 }
340 
341 TEST(CommandLineTest, LookupFailsInWrongSubCommand) {
342   cl::ResetCommandLineParser();
343 
344   StackSubCommand SC1("sc1", "First subcommand");
345   StackSubCommand SC2("sc2", "Second subcommand");
346 
347   StackOption<bool> SC1Opt("sc1", cl::sub(SC1), cl::init(false));
348   StackOption<bool> SC2Opt("sc2", cl::sub(SC2), cl::init(false));
349 
350   std::string Errs;
351   raw_string_ostream OS(Errs);
352 
353   const char *args[] = {"prog", "sc1", "-sc2"};
354   EXPECT_FALSE(cl::ParseCommandLineOptions(3, args, StringRef(), &OS));
355   OS.flush();
356   EXPECT_FALSE(Errs.empty());
357 }
358 
359 TEST(CommandLineTest, AddToAllSubCommands) {
360   cl::ResetCommandLineParser();
361 
362   StackSubCommand SC1("sc1", "First subcommand");
363   StackOption<bool> AllOpt("everywhere", cl::sub(*cl::AllSubCommands),
364                            cl::init(false));
365   StackSubCommand SC2("sc2", "Second subcommand");
366 
367   const char *args[] = {"prog", "-everywhere"};
368   const char *args2[] = {"prog", "sc1", "-everywhere"};
369   const char *args3[] = {"prog", "sc2", "-everywhere"};
370 
371   std::string Errs;
372   raw_string_ostream OS(Errs);
373 
374   EXPECT_FALSE(AllOpt);
375   EXPECT_TRUE(cl::ParseCommandLineOptions(2, args, StringRef(), &OS));
376   EXPECT_TRUE(AllOpt);
377 
378   AllOpt = false;
379 
380   cl::ResetAllOptionOccurrences();
381   EXPECT_FALSE(AllOpt);
382   EXPECT_TRUE(cl::ParseCommandLineOptions(3, args2, StringRef(), &OS));
383   EXPECT_TRUE(AllOpt);
384 
385   AllOpt = false;
386 
387   cl::ResetAllOptionOccurrences();
388   EXPECT_FALSE(AllOpt);
389   EXPECT_TRUE(cl::ParseCommandLineOptions(3, args3, StringRef(), &OS));
390   EXPECT_TRUE(AllOpt);
391 
392   // Since all parsing succeeded, the error message should be empty.
393   OS.flush();
394   EXPECT_TRUE(Errs.empty());
395 }
396 
397 TEST(CommandLineTest, ReparseCommandLineOptions) {
398   cl::ResetCommandLineParser();
399 
400   StackOption<bool> TopLevelOpt("top-level", cl::sub(*cl::TopLevelSubCommand),
401                                 cl::init(false));
402 
403   const char *args[] = {"prog", "-top-level"};
404 
405   EXPECT_FALSE(TopLevelOpt);
406   EXPECT_TRUE(
407       cl::ParseCommandLineOptions(2, args, StringRef(), &llvm::nulls()));
408   EXPECT_TRUE(TopLevelOpt);
409 
410   TopLevelOpt = false;
411 
412   cl::ResetAllOptionOccurrences();
413   EXPECT_FALSE(TopLevelOpt);
414   EXPECT_TRUE(
415       cl::ParseCommandLineOptions(2, args, StringRef(), &llvm::nulls()));
416   EXPECT_TRUE(TopLevelOpt);
417 }
418 
419 TEST(CommandLineTest, RemoveFromRegularSubCommand) {
420   cl::ResetCommandLineParser();
421 
422   StackSubCommand SC("sc", "Subcommand");
423   StackOption<bool> RemoveOption("remove-option", cl::sub(SC), cl::init(false));
424   StackOption<bool> KeepOption("keep-option", cl::sub(SC), cl::init(false));
425 
426   const char *args[] = {"prog", "sc", "-remove-option"};
427 
428   std::string Errs;
429   raw_string_ostream OS(Errs);
430 
431   EXPECT_FALSE(RemoveOption);
432   EXPECT_TRUE(cl::ParseCommandLineOptions(3, args, StringRef(), &OS));
433   EXPECT_TRUE(RemoveOption);
434   OS.flush();
435   EXPECT_TRUE(Errs.empty());
436 
437   RemoveOption.removeArgument();
438 
439   cl::ResetAllOptionOccurrences();
440   EXPECT_FALSE(cl::ParseCommandLineOptions(3, args, StringRef(), &OS));
441   OS.flush();
442   EXPECT_FALSE(Errs.empty());
443 }
444 
445 TEST(CommandLineTest, RemoveFromTopLevelSubCommand) {
446   cl::ResetCommandLineParser();
447 
448   StackOption<bool> TopLevelRemove(
449       "top-level-remove", cl::sub(*cl::TopLevelSubCommand), cl::init(false));
450   StackOption<bool> TopLevelKeep(
451       "top-level-keep", cl::sub(*cl::TopLevelSubCommand), cl::init(false));
452 
453   const char *args[] = {"prog", "-top-level-remove"};
454 
455   EXPECT_FALSE(TopLevelRemove);
456   EXPECT_TRUE(
457       cl::ParseCommandLineOptions(2, args, StringRef(), &llvm::nulls()));
458   EXPECT_TRUE(TopLevelRemove);
459 
460   TopLevelRemove.removeArgument();
461 
462   cl::ResetAllOptionOccurrences();
463   EXPECT_FALSE(
464       cl::ParseCommandLineOptions(2, args, StringRef(), &llvm::nulls()));
465 }
466 
467 TEST(CommandLineTest, RemoveFromAllSubCommands) {
468   cl::ResetCommandLineParser();
469 
470   StackSubCommand SC1("sc1", "First Subcommand");
471   StackSubCommand SC2("sc2", "Second Subcommand");
472   StackOption<bool> RemoveOption("remove-option", cl::sub(*cl::AllSubCommands),
473                                  cl::init(false));
474   StackOption<bool> KeepOption("keep-option", cl::sub(*cl::AllSubCommands),
475                                cl::init(false));
476 
477   const char *args0[] = {"prog", "-remove-option"};
478   const char *args1[] = {"prog", "sc1", "-remove-option"};
479   const char *args2[] = {"prog", "sc2", "-remove-option"};
480 
481   // It should work for all subcommands including the top-level.
482   EXPECT_FALSE(RemoveOption);
483   EXPECT_TRUE(
484       cl::ParseCommandLineOptions(2, args0, StringRef(), &llvm::nulls()));
485   EXPECT_TRUE(RemoveOption);
486 
487   RemoveOption = false;
488 
489   cl::ResetAllOptionOccurrences();
490   EXPECT_FALSE(RemoveOption);
491   EXPECT_TRUE(
492       cl::ParseCommandLineOptions(3, args1, StringRef(), &llvm::nulls()));
493   EXPECT_TRUE(RemoveOption);
494 
495   RemoveOption = false;
496 
497   cl::ResetAllOptionOccurrences();
498   EXPECT_FALSE(RemoveOption);
499   EXPECT_TRUE(
500       cl::ParseCommandLineOptions(3, args2, StringRef(), &llvm::nulls()));
501   EXPECT_TRUE(RemoveOption);
502 
503   RemoveOption.removeArgument();
504 
505   // It should not work for any subcommands including the top-level.
506   cl::ResetAllOptionOccurrences();
507   EXPECT_FALSE(
508       cl::ParseCommandLineOptions(2, args0, StringRef(), &llvm::nulls()));
509   cl::ResetAllOptionOccurrences();
510   EXPECT_FALSE(
511       cl::ParseCommandLineOptions(3, args1, StringRef(), &llvm::nulls()));
512   cl::ResetAllOptionOccurrences();
513   EXPECT_FALSE(
514       cl::ParseCommandLineOptions(3, args2, StringRef(), &llvm::nulls()));
515 }
516 
517 TEST(CommandLineTest, GetRegisteredSubcommands) {
518   cl::ResetCommandLineParser();
519 
520   StackSubCommand SC1("sc1", "First Subcommand");
521   StackOption<bool> Opt1("opt1", cl::sub(SC1), cl::init(false));
522   StackSubCommand SC2("sc2", "Second subcommand");
523   StackOption<bool> Opt2("opt2", cl::sub(SC2), cl::init(false));
524 
525   const char *args0[] = {"prog", "sc1"};
526   const char *args1[] = {"prog", "sc2"};
527 
528   EXPECT_TRUE(
529       cl::ParseCommandLineOptions(2, args0, StringRef(), &llvm::nulls()));
530   EXPECT_FALSE(Opt1);
531   EXPECT_FALSE(Opt2);
532   for (auto *S : cl::getRegisteredSubcommands()) {
533     if (*S) {
534       EXPECT_EQ("sc1", S->getName());
535     }
536   }
537 
538   cl::ResetAllOptionOccurrences();
539   EXPECT_TRUE(
540       cl::ParseCommandLineOptions(2, args1, StringRef(), &llvm::nulls()));
541   EXPECT_FALSE(Opt1);
542   EXPECT_FALSE(Opt2);
543   for (auto *S : cl::getRegisteredSubcommands()) {
544     if (*S) {
545       EXPECT_EQ("sc2", S->getName());
546     }
547   }
548 }
549 
550 TEST(CommandLineTest, ArgumentLimit) {
551   std::string args(32 * 4096, 'a');
552   EXPECT_FALSE(llvm::sys::commandLineFitsWithinSystemLimits("cl", args.data()));
553 }
554 
555 TEST(CommandLineTest, ResponseFiles) {
556   llvm::SmallString<128> TestDir;
557   std::error_code EC =
558     llvm::sys::fs::createUniqueDirectory("unittest", TestDir);
559   EXPECT_TRUE(!EC);
560 
561   // Create included response file of first level.
562   llvm::SmallString<128> IncludedFileName;
563   llvm::sys::path::append(IncludedFileName, TestDir, "resp1");
564   std::ofstream IncludedFile(IncludedFileName.c_str());
565   EXPECT_TRUE(IncludedFile.is_open());
566   IncludedFile << "-option_1 -option_2\n"
567                   "@incdir/resp2\n"
568                   "-option_3=abcd\n";
569   IncludedFile.close();
570 
571   // Directory for included file.
572   llvm::SmallString<128> IncDir;
573   llvm::sys::path::append(IncDir, TestDir, "incdir");
574   EC = llvm::sys::fs::create_directory(IncDir);
575   EXPECT_TRUE(!EC);
576 
577   // Create included response file of second level.
578   llvm::SmallString<128> IncludedFileName2;
579   llvm::sys::path::append(IncludedFileName2, IncDir, "resp2");
580   std::ofstream IncludedFile2(IncludedFileName2.c_str());
581   EXPECT_TRUE(IncludedFile2.is_open());
582   IncludedFile2 << "-option_21 -option_22\n";
583   IncludedFile2 << "-option_23=abcd\n";
584   IncludedFile2.close();
585 
586   // Prepare 'file' with reference to response file.
587   SmallString<128> IncRef;
588   IncRef.append(1, '@');
589   IncRef.append(IncludedFileName.c_str());
590   llvm::SmallVector<const char *, 4> Argv =
591                           { "test/test", "-flag_1", IncRef.c_str(), "-flag_2" };
592 
593   // Expand response files.
594   llvm::BumpPtrAllocator A;
595   llvm::StringSaver Saver(A);
596   bool Res = llvm::cl::ExpandResponseFiles(
597                     Saver, llvm::cl::TokenizeGNUCommandLine, Argv, false, true);
598   EXPECT_TRUE(Res);
599   EXPECT_EQ(Argv.size(), 9U);
600   EXPECT_STREQ(Argv[0], "test/test");
601   EXPECT_STREQ(Argv[1], "-flag_1");
602   EXPECT_STREQ(Argv[2], "-option_1");
603   EXPECT_STREQ(Argv[3], "-option_2");
604   EXPECT_STREQ(Argv[4], "-option_21");
605   EXPECT_STREQ(Argv[5], "-option_22");
606   EXPECT_STREQ(Argv[6], "-option_23=abcd");
607   EXPECT_STREQ(Argv[7], "-option_3=abcd");
608   EXPECT_STREQ(Argv[8], "-flag_2");
609 
610   llvm::sys::fs::remove(IncludedFileName2);
611   llvm::sys::fs::remove(IncDir);
612   llvm::sys::fs::remove(IncludedFileName);
613   llvm::sys::fs::remove(TestDir);
614 }
615 
616 TEST(CommandLineTest, SetDefautValue) {
617   cl::ResetCommandLineParser();
618 
619   StackOption<std::string> Opt1("opt1", cl::init("true"));
620   StackOption<bool> Opt2("opt2", cl::init(true));
621   cl::alias Alias("alias", llvm::cl::aliasopt(Opt2));
622   StackOption<int> Opt3("opt3", cl::init(3));
623 
624   const char *args[] = {"prog", "-opt1=false", "-opt2", "-opt3"};
625 
626   EXPECT_TRUE(
627     cl::ParseCommandLineOptions(2, args, StringRef(), &llvm::nulls()));
628 
629   EXPECT_TRUE(Opt1 == "false");
630   EXPECT_TRUE(Opt2);
631   EXPECT_TRUE(Opt3 == 3);
632 
633   Opt2 = false;
634   Opt3 = 1;
635 
636   cl::ResetAllOptionOccurrences();
637 
638   for (auto &OM : cl::getRegisteredOptions(*cl::TopLevelSubCommand)) {
639     cl::Option *O = OM.second;
640     if (O->ArgStr == "opt2") {
641       continue;
642     }
643     O->setDefault();
644   }
645 
646   EXPECT_TRUE(Opt1 == "true");
647   EXPECT_TRUE(Opt2);
648   EXPECT_TRUE(Opt3 == 3);
649 }
650 
651 }  // anonymous namespace
652