[clang][cli] Port HeaderSearch simple string options to new option parsing system

[jansvoboda11]

Summary

Depends on D84669

[jansvoboda11]

Taking over this patch, as Daniel is no longer involved.

[jansvoboda11]

Rebase, undo unnecessary move of options

[Bigcheese]

lgtm with nit.

clang/include/clang/Driver/Options.td

1815

Missing a space.

[jansvoboda11]

Committing with whitespace fix and with std::string constructors removed.

clang/include/clang/Driver/Options.td

defm delayed_template_parsing : BoolFOption<"delayed-template-parsing",
   ResetBy<NegFlag, [NoXarchOption], "Disable delayed template parsing">,
   BothFlags<[CoreOption]>>;
 def fms_memptr_rep_EQ : Joined<["-"], "fms-memptr-rep=">, Group<f_Group>, Flags<[CC1Option]>;
 def fmodules_cache_path : Joined<["-"], "fmodules-cache-path=">, Group<i_Group>,
   Flags<[NoXarchOption, CC1Option]>, MetaVarName<"<directory>">,
   HelpText<"Specify the module cache path">;
 def fmodules_user_build_path : Separate<["-"], "fmodules-user-build-path">, Group<i_Group>,
   Flags<[NoXarchOption, CC1Option]>, MetaVarName<"<directory>">,
-  HelpText<"Specify the module user build path">;
+  HelpText<"Specify the module user build path">,
+  MarshallingInfoString<"HeaderSearchOpts->ModuleUserBuildPath">;
 def fprebuilt_module_path : Joined<["-"], "fprebuilt-module-path=">, Group<i_Group>,
   Flags<[NoXarchOption, CC1Option]>, MetaVarName<"<directory>">,
   HelpText<"Specify the prebuilt module path">;
 defm prebuilt_implicit_modules : OptInFFlag<"prebuilt-implicit-modules",
   "Look up implicit modules in the prebuilt module path", "", "",
   [NoXarchOption, CC1Option], "HeaderSearchOpts->EnablePrebuiltImplicitModules">;
 def fmodules_prune_interval : Joined<["-"], "fmodules-prune-interval=">, Group<i_Group>,
   Flags<[CC1Option]>, MetaVarName<"<seconds>">,
-  HelpText<"Specify the interval (in seconds) between attempts to prune the module cache">;
+  HelpText<"Specify the interval (in seconds) between attempts to prune the module cache">,
+  MarshallingInfoStringInt<"HeaderSearchOpts->ModuleCachePruneInterval", "7 * 24 * 60 * 60">;
 def fmodules_prune_after : Joined<["-"], "fmodules-prune-after=">, Group<i_Group>,
   Flags<[CC1Option]>, MetaVarName<"<seconds>">,
-  HelpText<"Specify the interval (in seconds) after which a module file will be considered unused">;
+  HelpText<"Specify the interval (in seconds) after which a module file will be considered unused">,
+  MarshallingInfoStringInt<"HeaderSearchOpts->ModuleCachePruneAfter", "31 * 24 * 60 * 60">;
 def fmodules_search_all : Flag <["-"], "fmodules-search-all">, Group<f_Group>,
   Flags<[NoXarchOption, CC1Option]>,
   HelpText<"Search even non-imported modules to resolve references">;
 def fbuild_session_timestamp : Joined<["-"], "fbuild-session-timestamp=">,
   Group<i_Group>, Flags<[CC1Option]>, MetaVarName<"<time since Epoch in seconds>">,
-  HelpText<"Time when the current build session started">;
+  HelpText<"Time when the current build session started">,
+  MarshallingInfoStringInt<"HeaderSearchOpts->BuildSessionTimestamp">;
 def fbuild_session_file : Joined<["-"], "fbuild-session-file=">,
   Group<i_Group>, MetaVarName<"<file>">,
   HelpText<"Use the last modification time of <file> as the build session timestamp">;
 def fmodules_validate_once_per_build_session : Flag<["-"], "fmodules-validate-once-per-build-session">,
   Group<i_Group>, Flags<[CC1Option]>,
   HelpText<"Don't verify input files for the modules if the module has been "
            "successfully validated or loaded during this build session">,
   MarshallingInfoFlag<"HeaderSearchOpts->ModulesValidateOncePerBuildSession">;
def verify_pch : Flag<["-"], "verify-pch">, Group<Action_Group>, Flags<[CC1Option]>,
   HelpText<"Load and verify that a pre-compiled header file is not stale">;
 def init : Separate<["-"], "init">;
 def install__name : Separate<["-"], "install_name">;
 def iprefix : JoinedOrSeparate<["-"], "iprefix">, Group<clang_i_Group>, Flags<[CC1Option]>,
   HelpText<"Set the -iwithprefix/-iwithprefixbefore prefix">, MetaVarName<"<dir>">;
 def iquote : JoinedOrSeparate<["-"], "iquote">, Group<clang_i_Group>, Flags<[CC1Option]>,
   HelpText<"Add directory to QUOTE include search path">, MetaVarName<"<directory>">;
 def isysroot : JoinedOrSeparate<["-"], "isysroot">, Group<clang_i_Group>, Flags<[CC1Option]>,
-  HelpText<"Set the system root directory (usually /)">, MetaVarName<"<dir>">;
+  HelpText<"Set the system root directory (usually /)">, MetaVarName<"<dir>">,
+  MarshallingInfoString<"HeaderSearchOpts->Sysroot", [{"/"}]>;
 def isystem : JoinedOrSeparate<["-"], "isystem">, Group<clang_i_Group>,
   Flags<[CC1Option]>,
   HelpText<"Add directory to SYSTEM include search path">, MetaVarName<"<directory>">;
 def isystem_after : JoinedOrSeparate<["-"], "isystem-after">,
   Group<clang_i_Group>, Flags<[NoXarchOption]>, MetaVarName<"<directory>">,
   HelpText<"Add directory to end of the SYSTEM include search path">;
 def iwithprefixbefore : JoinedOrSeparate<["-"], "iwithprefixbefore">, Group<clang_i_Group>,
   HelpText<"Set directory to include search path with prefix">, MetaVarName<"<dir>">,

 def remap : Flag<["-"], "remap">;
 def rewrite_objc : Flag<["-"], "rewrite-objc">, Flags<[NoXarchOption,CC1Option]>,
   HelpText<"Rewrite Objective-C source to C++">, Group<Action_Group>;
 def rewrite_legacy_objc : Flag<["-"], "rewrite-legacy-objc">, Flags<[NoXarchOption]>,
   HelpText<"Rewrite Legacy Objective-C source to C++">;
 def rdynamic : Flag<["-"], "rdynamic">, Group<Link_Group>;
 def resource_dir : Separate<["-"], "resource-dir">,
   Flags<[NoXarchOption, CC1Option, CoreOption, HelpHidden]>,
-  HelpText<"The directory which holds the compiler resource files">;
+  HelpText<"The directory which holds the compiler resource files">,
+  MarshallingInfoString<"HeaderSearchOpts->ResourceDir">;
 def resource_dir_EQ : Joined<["-"], "resource-dir=">, Flags<[NoXarchOption, CoreOption]>,
   Alias<resource_dir>;
 def rpath : Separate<["-"], "rpath">, Flags<[LinkerInput]>, Group<Link_Group>;
 def rtlib_EQ : Joined<["-", "--"], "rtlib=">,
   HelpText<"Compiler runtime library to use">;
 def frtlib_add_rpath: Flag<["-"], "frtlib-add-rpath">, Flags<[NoArgumentUnused]>,
   HelpText<"Add -rpath with architecture-specific resource directory to the linker flags">;
 def fno_rtlib_add_rpath: Flag<["-"], "fno-rtlib-add-rpath">, Flags<[NoArgumentUnused]>,
def fmodules_codegen :
   MarshallingInfoFlag<"LangOpts->ModulesCodegen">;
 def fmodules_debuginfo :
   Flag<["-"], "fmodules-debuginfo">,
   HelpText<"Generate debug info for types in an object file built from this "
            "module and do not generate them elsewhere">,
   MarshallingInfoFlag<"LangOpts->ModulesDebugInfo">;
 def fmodule_format_EQ : Joined<["-"], "fmodule-format=">,
   HelpText<"Select the container format for clang modules and PCH. "
-           "Supported options are 'raw' and 'obj'.">;
+           "Supported options are 'raw' and 'obj'.">,
+  MarshallingInfoString<"HeaderSearchOpts->ModuleFormat", [{"raw"}]>;
 def ftest_module_file_extension_EQ :
   Joined<["-"], "ftest-module-file-extension=">,
   HelpText<"introduce a module file extension for testing purposes. "
            "The argument is parsed as blockname:major:minor:hashed:user info">;
 def fconcepts_ts : Flag<["-"], "fconcepts-ts">,
   HelpText<"Enable C++ Extensions for Concepts. (deprecated - use -std=c++2a)">;
 def fno_concept_satisfaction_caching : Flag<["-"],
                                             "fno-concept-satisfaction-caching">,

clang/lib/Frontend/CompilerInvocation.cpp

std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
                                                  void *MainAddr) {
   std::string ClangExecutable =
       llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
   return Driver::GetResourcesPath(ClangExecutable, CLANG_RESOURCE_DIR);
 }
 
 static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args,
                                   const std::string &WorkingDir) {
-  Opts.Sysroot = std::string(Args.getLastArgValue(OPT_isysroot, "/"));
   if (const Arg *A = Args.getLastArg(OPT_stdlib_EQ))
     Opts.UseLibcxx = (strcmp(A->getValue(), "libc++") == 0);
-  Opts.ResourceDir = std::string(Args.getLastArgValue(OPT_resource_dir));
 
   // Canonicalize -fmodules-cache-path before storing it.
   SmallString<128> P(Args.getLastArgValue(OPT_fmodules_cache_path));
   if (!(P.empty() || llvm::sys::path::is_absolute(P))) {
     if (WorkingDir.empty())
       llvm::sys::fs::make_absolute(P);
     else
       llvm::sys::fs::make_absolute(WorkingDir, P);
   }
   llvm::sys::path::remove_dots(P);
   Opts.ModuleCachePath = std::string(P.str());
 
-  Opts.ModuleUserBuildPath =
-      std::string(Args.getLastArgValue(OPT_fmodules_user_build_path));
   // Only the -fmodule-file=<name>=<file> form.
   for (const auto *A : Args.filtered(OPT_fmodule_file)) {
     StringRef Val = A->getValue();
     if (Val.find('=') != StringRef::npos){
       auto Split = Val.split('=');
       Opts.PrebuiltModuleFiles.insert(
           {std::string(Split.first), std::string(Split.second)});
     }
   }
   for (const auto *A : Args.filtered(OPT_fprebuilt_module_path))
     Opts.AddPrebuiltModulePath(A->getValue());
-  Opts.ModuleCachePruneInterval =
-      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
-  Opts.ModuleCachePruneAfter =
-      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
-  Opts.BuildSessionTimestamp =
-      getLastArgUInt64Value(Args, OPT_fbuild_session_timestamp, 0);
-  if (const Arg *A = Args.getLastArg(OPT_fmodule_format_EQ))
-    Opts.ModuleFormat = A->getValue();
 
   for (const auto *A : Args.filtered(OPT_fmodules_ignore_macro)) {
     StringRef MacroDef = A->getValue();
     Opts.ModulesIgnoreMacros.insert(
         llvm::CachedHashString(MacroDef.split('=').first));
   }
 
   // Add -I..., -F..., and -index-header-map options in order.