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平均能量损失

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平均能量损失

后续行动这个答案对于我之前的问题，我有以下问题需要解决：

1-如果answers禁用该选项，我需要设置twofilestrue仅生成考试而不生成解决方案。

2- 使用lualatex（即\latexmkiffalse）并answers启用该选项时，我无法生成任何 pdf 文件。它进入无限编译循环。

\documentclass{exam}
\usepackage{expl3}

\newif\iftwofiles
\twofilesfalse% false to print one file , true for both at a time

\newif\iflatexmkif
\latexmkiffalse% true to use latexmk , false to use lualatex

\ExplSyntaxOn

\str_new:N \g__diaa_solved_jobname_str

\iflatexmkif
    \str_new:N \l__diaa_latexmk_engine_str
    \str_const:Nn \l__diaa_latexmk { latexmk }
\else
    \str_const:Nn \l__diaa_latex_cmd { lualatex }
    \str_const:Nn \l__diaa_latex_options { -synctex=1 ~ -interaction=nonstopmode ~ -shell-escape }
\fi

\cs_new:Nn \__diaa_build_solved_jobname:
{
\str_gset:Nx \g__diaa_solved_jobname_str { \c_sys_jobname_str }
\str_gremove_all:Nn \g__diaa_solved_jobname_str { " }
\str_gput_left:Nn \g__diaa_solved_jobname_str { "[solved]~ }
\str_gput_right:Nn \g__diaa_solved_jobname_str { " }
}

\sys_if_shell_unrestricted:T
{
    \iflatexmkif

        \sys_if_engine_luatex:T
        { \str_set:Nn \l__diaa_latexmk_engine_str { -lualatex ~ -g ~ -interaction=nonstopmode } }
        \sys_if_engine_pdftex:T
        { \str_set:Nn \l__diaa_latexmk_engine_str { -pdf } }
        \sys_if_engine_xetex:T
        { \str_set:Nn \l__diaa_latexmk_engine_str { -xelatex } }

        \iftwofiles

            \__diaa_build_solved_jobname:
            \sys_shell_now:x
            {% printing the solution
                \l__diaa_latexmk \c_space_tl
                \l__diaa_latexmk_engine_str \c_space_tl
                -usepretex="\string\AtBeginDocument{\string\printanswerstrue}" \c_space_tl
                -jobname=\g__diaa_solved_jobname_str \c_space_tl
                \c_sys_jobname_str
            }
            \sys_shell_now:x
            {% printing the exam
                \l__diaa_latexmk \c_space_tl
                \l__diaa_latexmk_engine_str \c_space_tl
                -usepretex="\string\AtBeginDocument{\string\printanswersfalse}" \c_space_tl
                \c_sys_jobname_str
            }
            \stop

        \else % one file

            \legacy_if:nT { printanswers }
            {
                \__diaa_build_solved_jobname:
                \sys_shell_now:x
                {
                    \l__diaa_latexmk \c_space_tl
                    \l__diaa_latexmk_engine_str \c_space_tl
                    -jobname=\g__diaa_solved_jobname_str \c_space_tl
                    \c_sys_jobname_str
                }
                \stop
            }
        \fi

    \else % lualatex

        \iftwofiles

            \__diaa_build_solved_jobname:
            \sys_shell_now:x
            {% printing the solution
                \l__diaa_latex_cmd \c_space_tl
                -jobname=\g__diaa_solved_jobname_str \c_space_tl
                \l__diaa_latex_options \c_space_tl
                "\string\AtBeginDocument{\string\printanswerstrue}" \c_space_tl
                "\string\input{\c_sys_jobname_str}"
            }
            \sys_shell_now:x
            {% printing the exam
                \l__diaa_latex_cmd \c_space_tl
                -jobname=\c_sys_jobname_str \c_space_tl
                \l__diaa_latex_options \c_space_tl
                "\string\AtBeginDocument{\string\printanswersfalse}" \c_space_tl
                "\string\input{\c_sys_jobname_str}"
            }
            \stop

        \else % one file

            \legacy_if:nT { printanswers } % if answers is enabled
            {
                \__diaa_build_solved_jobname:
                \sys_shell_now:x
                {
                    \l__diaa_latex_cmd \c_space_tl
                    \l__diaa_latex_options \c_space_tl
                    -jobname=\g__diaa_solved_jobname_str \c_space_tl
                    \c_sys_jobname_str
                }
                \stop
            }
        \fi
    \fi
}

\ExplSyntaxOff

\begin{document}
    \begin{questions}
        \question some question
        \begin{solution}
            the solution
        \end{solution}
    \end{questions}
\end{document}

答案1

由于在构建过程中-shell-escape传递了 ，因此出现了无限循环。因此测试通过，您再次运行。lualatex\sys_shell_now:x\sys_if_shell_unrestricted:Tlualatex

如果我理解正确，以下 MWE 将会满足您的要求。

如果未指定 classanswers选项，则无论是否使用 调用初始构建，都只会生成问题-shell-escape。您可以通过取消注释 来覆盖此设置\bool_gset_true:N \g__diaa_build_two_files_bool，在这种情况下，将始终生成问题和答案。

当使用 进行编译时-shell-escape，构建将使用您启动编译的任何引擎（pdflatex，lualatex，xelatex）。

您可以latexmk通过取消注释来使用它进行构建\bool_gset_true:N \g__diaa_use_latexmk_bool（假设您也使用该标志启动构建-shell-escape）。

更新

你现在可以：

  • 使用 控制问题的输出\g__diaa_build_questions_bool。
  • 使用 控制答案的输出\g__diaa_build_solved_bool。
  • \g__diaa_latex_options_str分别使用和指定 LaTeX 和 Latexmk 的选项\g__diaa_latexmk_options_str。
  • 控制是否使用 Latexmk \g__diaa_use_latexmk_bool。

为了确保 synctex 数据正确写入，您将需要选项-synctex=1 -output-directory=out。这可确保文件不会被主编译过程覆盖。

平均能量损失

\documentclass[answers]{exam}

\usepackage{expl3}

\ExplSyntaxOn

% Flag to enable Latexmk
\bool_new:N \g__diaa_use_latexmk_bool

% Uncomment the following line to use Latexmk
%\bool_gset_true:N \g__diaa_use_latexmk_bool


% Flag to output questions and/or answers
\bool_new:N \g__diaa_build_questions_bool
\bool_new:N \g__diaa_build_solved_bool

% Always build questions
\bool_gset_true:N \g__diaa_build_questions_bool

% Build answers if class answers option is set
\legacy_if:nT { printanswers }
  {
    \bool_gset_true:N \g__diaa_build_solved_bool
  }

% Uncomment the following line to not build questions
%\bool_gset_false:N \g__diaa_build_questions_bool

% Uncomment the following line to always build answers even if class answers option is not set
%\bool_gset_true:N \g__diaa_build_solved_bool


% Answers jobname variable
\str_new:N \g__diaa_solved_jobname_str

% LaTeX engine and options variables
\str_new:N \g__diaa_latex_cmd_str
\str_const:Nn \g__diaa_latex_options_str { -synctex=1 ~ -output-directory=out ~ -interaction=nonstopmode }

% Latexmk engine and options variables
\str_const:Nn \g__diaa_latexmk_str { latexmk }
\str_const:Nn \g__diaa_latexmk_options_str { -synctex=1 ~ -output-directory=out }
\str_new:N \g__diaa_latexmk_engine_str

% Final build commands
\str_new:N \g__diaa_cmd_questions_str
\str_new:N \g__diaa_cmd_solved_str


% Build the answer jobname
\cs_new:Nn \__diaa_build_solved_jobname:
  {
    \str_gset:Nx \g__diaa_solved_jobname_str { \c_sys_jobname_str }
    \str_gremove_all:Nn \g__diaa_solved_jobname_str { " }
    \str_gput_left:Nn \g__diaa_solved_jobname_str { " }
    \str_gput_right:Nn \g__diaa_solved_jobname_str { ~[solved]" }
  }

% Set engines based on current engine
\cs_new:Nn \__diaa_set_engine:
  {
    \sys_if_engine_luatex:T
      {
        \str_gset:Nn \g__diaa_latex_cmd_str { lualatex }
        \str_gset:Nn \g__diaa_latexmk_engine_str { -lualatex }
      }
    \sys_if_engine_pdftex:T
      {
        \str_gset:Nn \g__diaa_latex_cmd_str { pdflatex }
        \str_gset:Nn \g__diaa_latexmk_engine_str { -pdf }
      }
    \sys_if_engine_xetex:T
      {
        \str_gset:Nn \g__diaa_latex_cmd_str { xelatex }
        \str_gset:Nn \g__diaa_latexmk_engine_str { -xelatex }
      }
  }

% Build LaTeX questions command
\cs_new:Nn \__diaa_build_latex_questions_cmd:
  {
    \str_gset:Nx \g__diaa_cmd_questions_str
      {
        \g__diaa_latex_cmd_str \c_space_tl
        -jobname=\c_sys_jobname_str \c_space_tl
        \g__diaa_latex_options_str \c_space_tl
        "\string\AtBeginDocument{\string\printanswersfalse}" \c_space_tl
        "\string\input{\c_sys_jobname_str}"
      }
  }

% Build LaTeX answers command
\cs_new:Nn \__diaa_build_latex_solved_cmd:
  {
    \str_gset:Nx \g__diaa_cmd_solved_str
      {
        \g__diaa_latex_cmd_str \c_space_tl
        -jobname=\g__diaa_solved_jobname_str \c_space_tl
        \g__diaa_latex_options_str \c_space_tl
        "\string\AtBeginDocument{\string\printanswerstrue}" \c_space_tl
        "\string\input{\c_sys_jobname_str}"
      }
  }

% Build Latexmk questions command
\cs_new:Nn \__diaa_build_latexmk_questions_cmd:
  {
    \str_gset:Nx \g__diaa_cmd_questions_str
      {
        \g__diaa_latexmk_str \c_space_tl
        \g__diaa_latexmk_engine_str \c_space_tl
        \g__diaa_latexmk_options_str \c_space_tl
        -usepretex="\string\AtBeginDocument{\string\printanswersfalse}" \c_space_tl
        \c_sys_jobname_str
      }
  }

% Build Latexmk answers command
\cs_new:Nn \__diaa_build_latexmk_solved_cmd:
  {
    \str_gset:Nx \g__diaa_cmd_solved_str
      {
        \g__diaa_latexmk_str \c_space_tl
        \g__diaa_latexmk_engine_str \c_space_tl
        \g__diaa_latexmk_options_str \c_space_tl
        -usepretex="\string\AtBeginDocument{\string\printanswerstrue}" \c_space_tl
        -jobname=\g__diaa_solved_jobname_str \c_space_tl
        \c_sys_jobname_str
      }
  }


% Build the files
\sys_if_shell_unrestricted:T
  {
    % Set up engines
    \__diaa_set_engine:

    % Build answers jobname
    \__diaa_build_solved_jobname:

    % Set up compile commands
    \bool_if:NTF \g__diaa_use_latexmk_bool
      {
        \__diaa_build_latexmk_questions_cmd:
        \__diaa_build_latexmk_solved_cmd:
      }
      {
        \__diaa_build_latex_questions_cmd:
        \__diaa_build_latex_solved_cmd:
      }

    % Build questions
    \bool_if:NT \g__diaa_build_questions_bool
      {
        \sys_shell_now:x
          {
            \str_use:N \g__diaa_cmd_questions_str
          }
      }

    % Build answers
    \bool_if:NT \g__diaa_build_solved_bool
      {
        \sys_shell_now:x
          {
            \str_use:N \g__diaa_cmd_solved_str
          }
      }
    \stop
  }

\ExplSyntaxOff

\begin{document}
\begin{questions}
  \question One of these things is not like the others; one of these things is
  not the same. Which one is different?
  \begin{oneparchoices}
    \choice John
    \choice Paul
    \choice George
    \choice Ringo
    \CorrectChoice Socrates
  \end{oneparchoices}
\end{questions}
\end{document}

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