//===---  InterfaceStubs.cpp - Base InterfaceStubs Implementations C++  ---===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

#include "InterfaceStubs.h"

#include "CommonArgs.h"

#include "clang/Driver/Compilation.h"

#include "llvm/Support/Path.h"

namespace clang {

namespace driver {

namespace tools {

namespace ifstool {

void Merger::ConstructJob(Compilation &C, const JobAction &JA,

                          const InputInfo &Output, const InputInfoList &Inputs,

                          const llvm::opt::ArgList &Args,

                          const char *LinkingOutput) const {

  std::string Merger = getToolChain().GetProgramPath(getShortName());

  // TODO: Use IFS library directly in the future.

  llvm::opt::ArgStringList CmdArgs;

  CmdArgs.push_back("--input-format=IFS");

  const bool WriteBin = !Args.getLastArg(options::OPT_emit_merged_ifs);

  CmdArgs.push_back(WriteBin ? 
"--output-format=ELF"17
 : 
"--output-format=IFS"6
);

  CmdArgs.push_back("-o");

  // Normally we want to write to a side-car file ending in ".ifso" so for

  // example if `clang -emit-interface-stubs -shared -o libhello.so` were

  // invoked then we would like to get libhello.so and libhello.ifso. If the

  // stdout stream is given as the output file (ie `-o -`), that is the one

  // exception where we will just append to the same filestream as the normal

  // output.

  SmallString<128> OutputFilename(Output.getFilename());

  if (OutputFilename != "-") {

    if (Args.hasArg(options::OPT_shared))

      llvm::sys::path::replace_extension(OutputFilename,

                                         (WriteBin ? "ifso" : "ifs"));

    else

      OutputFilename += (WriteBin ? ".ifso" : 
".ifs"0
);

  }

  CmdArgs.push_back(Args.MakeArgString(OutputFilename.c_str()));

  // Here we append the input files. If the input files are object files, then

  // we look for .ifs files present in the same location as the object files.

  for (const auto &Input : Inputs) {

    if (!Input.isFilename())

      continue;

    SmallString<128> InputFilename(Input.getFilename());

    if (Input.getType() == types::TY_Object)

      llvm::sys::path::replace_extension(InputFilename, ".ifs");

    CmdArgs.push_back(Args.MakeArgString(InputFilename.c_str()));

  }

  C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),

                                         Args.MakeArgString(Merger), CmdArgs,

                                         Inputs, Output));

}

} // namespace ifstool

} // namespace tools

} // namespace driver

} // namespace clang