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

#include <sstream>
#include <string.h>

#include "cmMakefile.h"
#include "cmSystemTools.h"

class cmExecutionStatus;

// cmAddSubDirectoryCommand
bool
cmAddSubDirectoryCommand::InitialPass(std::vector<std::string> const& args,
                                      cmExecutionStatus&)
{
    if(args.empty())
    {
        this->SetError("called with incorrect number of arguments");
        return false;
    }

    // store the binpath
    std::string const& srcArg = args[0];
    std::string        binArg;

    bool excludeFromAll = false;

    // process the rest of the arguments looking for optional args
    std::vector<std::string>::const_iterator i = args.begin();
    ++i;
    for(; i != args.end(); ++i)
    {
        if(*i == "EXCLUDE_FROM_ALL")
        {
            excludeFromAll = true;
            continue;
        }
        if(binArg.empty())
        {
            binArg = *i;
        } else
        {
            this->SetError("called with incorrect number of arguments");
            return false;
        }
    }

    // Compute the full path to the specified source directory.
    // Interpret a relative path with respect to the current source directory.
    std::string srcPath;
    if(cmSystemTools::FileIsFullPath(srcArg))
    {
        srcPath = srcArg;
    } else
    {
        srcPath = this->Makefile->GetCurrentSourceDirectory();
        srcPath += "/";
        srcPath += srcArg;
    }
    if(!cmSystemTools::FileIsDirectory(srcPath))
    {
        std::string error = "given source \"";
        error += srcArg;
        error += "\" which is not an existing directory.";
        this->SetError(error);
        return false;
    }
    srcPath = cmSystemTools::CollapseFullPath(srcPath);

    // Compute the full path to the binary directory.
    std::string binPath;
    if(binArg.empty())
    {
        // No binary directory was specified.  If the source directory is
        // not a subdirectory of the current directory then it is an
        // error.
        if(!cmSystemTools::IsSubDirectory(
               srcPath, this->Makefile->GetCurrentSourceDirectory()))
        {
            std::ostringstream e;
            e << "not given a binary directory but the given source directory "
              << "\"" << srcPath << "\" is not a subdirectory of \""
              << this->Makefile->GetCurrentSourceDirectory() << "\".  "
              << "When specifying an out-of-tree source a binary directory "
              << "must be explicitly specified.";
            this->SetError(e.str());
            return false;
        }

        // Remove the CurrentDirectory from the srcPath and replace it
        // with the CurrentOutputDirectory.
        const std::string& src    = this->Makefile->GetCurrentSourceDirectory();
        const std::string& bin    = this->Makefile->GetCurrentBinaryDirectory();
        size_t             srcLen = src.length();
        size_t             binLen = bin.length();
        if(srcLen > 0 && src[srcLen - 1] == '/')
        {
            --srcLen;
        }
        if(binLen > 0 && bin[binLen - 1] == '/')
        {
            --binLen;
        }
        binPath = bin.substr(0, binLen) + srcPath.substr(srcLen);
    } else
    {
        // Use the binary directory specified.
        // Interpret a relative path with respect to the current binary
        // directory.
        if(cmSystemTools::FileIsFullPath(binArg))
        {
            binPath = binArg;
        } else
        {
            binPath = this->Makefile->GetCurrentBinaryDirectory();
            binPath += "/";
            binPath += binArg;
        }
    }
    binPath = cmSystemTools::CollapseFullPath(binPath);

    // Add the subdirectory using the computed full paths.
    this->Makefile->AddSubDirectory(srcPath, binPath, excludeFromAll, true);

    return true;
}
