/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file Copyright.txt or https://cmake.org/licensing for details.  */
#include "cmLinkDirectoriesCommand.h"

#include <sstream>

#include "cmAlgorithms.h"
#include "cmGeneratorExpression.h"
#include "cmMakefile.h"
#include "cmPolicies.h"
#include "cmSystemTools.h"
#include "cmake.h"

class cmExecutionStatus;

// cmLinkDirectoriesCommand
bool
cmLinkDirectoriesCommand::InitialPass(std::vector<std::string> const& args,
                                      cmExecutionStatus&)
{
    if(args.empty())
    {
        return true;
    }

    bool before = this->Makefile->IsOn("CMAKE_LINK_DIRECTORIES_BEFORE");

    auto i = args.cbegin();
    if((*i) == "BEFORE")
    {
        before = true;
        ++i;
    } else if((*i) == "AFTER")
    {
        before = false;
        ++i;
    }

    std::vector<std::string> directories;
    for(; i != args.cend(); ++i)
    {
        this->AddLinkDir(*i, directories);
    }

    this->Makefile->AddLinkDirectory(cmJoin(directories, ";"), before);

    return true;
}

void
cmLinkDirectoriesCommand::AddLinkDir(std::string const&        dir,
                                     std::vector<std::string>& directories)
{
    std::string unixPath = dir;
    cmSystemTools::ConvertToUnixSlashes(unixPath);
    if(!cmSystemTools::FileIsFullPath(unixPath) &&
       !cmGeneratorExpression::StartsWithGeneratorExpression(unixPath))
    {
        bool               convertToAbsolute = false;
        std::ostringstream e;
        /* clang-format off */
    e << "This command specifies the relative path\n"
      << "  " << unixPath << "\n"
      << "as a link directory.\n";
        /* clang-format on */
        switch(this->Makefile->GetPolicyStatus(cmPolicies::CMP0015))
        {
            case cmPolicies::WARN:
                e << cmPolicies::GetPolicyWarning(cmPolicies::CMP0015);
                this->Makefile->IssueMessage(cmake::AUTHOR_WARNING, e.str());
                break;
            case cmPolicies::OLD:
                // OLD behavior does not convert
                break;
            case cmPolicies::REQUIRED_IF_USED:
            case cmPolicies::REQUIRED_ALWAYS:
                e << cmPolicies::GetRequiredPolicyError(cmPolicies::CMP0015);
                this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str());
                CM_FALLTHROUGH;
            case cmPolicies::NEW:
                // NEW behavior converts
                convertToAbsolute = true;
                break;
        }
        if(convertToAbsolute)
        {
            std::string tmp = this->Makefile->GetCurrentSourceDirectory();
            tmp += "/";
            tmp += unixPath;
            unixPath = tmp;
        }
    }
    directories.push_back(unixPath);
}
