miktex (lualatex.exe) 无法从 flask 子进程运行

Question

我正在尝试使用 Flask 网络应用程序中的子进程调用构建乳胶文件。

    def pdf(self, ixTestsheet):
        build_dir = mkdtemp(prefix="testsheet_")
        tsfile = NamedTemporaryFile(dir=build_dir, suffix=".tex", delete=False)
        tsfile.write(self.latex(ixTestsheet, _print_type).encode("utf-8"))
        old_dir = os.getcwd()
        # os.chdir(build_dir)
        latexname = os.path.basename(tsfile.name)
        tsfile.close()

        # added this to check user of subprocess
        dirout = subprocess.run(
            ["whoami.exe"], cwd=build_dir, check=True, capture_output=True
        )
        current_app.logger.info(dirout)
        try:
            subprocess.run(
                [
                    current_app.config["LUALATEX_EXE"],
                    "--interaction=nonstopmode",
                    latexname,
                ],
                cwd=build_dir,
                check=True,
            )
            # call a second time to get a full build with page numbers etc.
            subprocess.run(
                [
                    current_app.config["LUALATEX_EXE"],
                    "--interaction=nonstopmode",
                    latexname,
                ],
                cwd=build_dir,
                check=True,
            )
        except subprocess.CalledProcessError as e:
            current_app.logger.error(build_dir)
            current_app.logger.error(e)

如果我运行来自 Flask 应用程序的进程失败并出现以下错误。如果我运行来自交互式 python 会话的命令，它将完成。

[2020-12-04 11:51:13,512] INFO in testsheets: CompletedProcess(args=['whoami.exe'], returncode=0, stdout=b'<DOMAINNAME>\<USERNAME>\r\n', stderr=b'')
lualatex.exe: No suitable temporary directory found.

Sorry, but "c:/Program Files/MiKTeX 2.9/miktex/bin/x64/lualatex.exe" did not succeed.
FATAL: No suitable temporary directory found.
FATAL: Data:
FATAL: Source: Libraries\MiKTeX\Core\Session\miktex.cpp:79
[2020-12-04 11:51:13,745] ERROR in testsheets: C:\Users\USERNA~1\AppData\Local\Temp\testsheet_oreb8wg5
[2020-12-04 11:51:13,745] ERROR in testsheets: Command '['c:/Program Files/MiKTeX 2.9/miktex/bin/x64/lualatex.exe', '--interaction=nonstopmode', 'tmpfk6un0c7.tex']' returned non-zero exit status 1.

我想弄清楚为什么 MiKTeX 在运行来自 Flask 时无法找到临时目录，但在运行来自交互式会话时可以。

据我所知：

用户运行从 flask 应用程序中执行命令与用户运行从交互式会话中执行命令相同。
MiKTeX 拥有构建 Latex 文件所需的所有包
subprocess 命令不是问题
临时目录的权限似乎没问题

Answer 1

似乎 TMP 和 TEMP 都存在于 subprocess 环境中，但是 TMP 被设置为空字符串。 MiKTeX 在 TEMP 之前使用 TMP 所以它失败了。

这样解决了

subprocess.run(
                [
                    current_app.config["LUALATEX_EXE"],
                    "--interaction=nonstopmode",
                    latexname,
                ],
                cwd=build_dir,
                check=True,
                env=dict(os.environ, TMP=os.environ["TEMP"]),
            )

miktex (lualatex.exe) 无法从 flask 子进程 运行

miktex (lualatex.exe) fails to run from flask subprocess

python

miktex

flask

miktex (lualatex.exe) 无法从 flask 子进程运行