带有“输入行太长"的批处理命令vcvarsall.bat错误；在Azure DevOps服务器上 [英] Batch command vcvarsall.bat errors with "input line is too long" on Azure DevOps server

问题描述

我正在Azure DevOps服务器管道上运行批处理文件作为批处理脚本任务.该批处理文件在内部调用英特尔Parallel Studio编译器2019更新3，如下所示:

I am running a batch file on Azure DevOps server pipeline as batch script task. This batch file internally invokes Intel Parallel studio compiler 2019 update 3 like this:

if %ERRORLEVEL% NEQ 0 (
    call "%ICPP_COMPILER19%bin\compilervars.bat" intel64 vs2017
)

并随后调用构建文件.

最近，我观察到此命令会引发错误，如下所示:

Lately, I am observing this command throws error as:

##[command]C:\build_dir\test.bat

Intel(R) MPI Library 2019 Update 3 for Windows* Target Build Environment for Intel(R) 64 applications
Copyright 2007-2019 Intel Corporation.

Copyright (C) 1985-2019 Intel Corporation. All rights reserved.
Intel(R) Compiler 19.0 Update 3 (package 203)
 
**********************************************************************
** Visual Studio 2017 Developer Command Prompt v15.0.26228.57
** Copyright (c) 2017 Microsoft Corporation
**********************************************************************
[vcvarsall.bat] Environment initialized for: 'x64'
The input line is too long.
The syntax of the command is incorrect.

这是什么错误，为什么现在呢?我看到了许多与此相关的问题，但找不到与查询相关的答案.

What is this error and why now? I saw many questions related to this but I couldn't find answers related to my query.

推荐答案

输入行太长.通常发生在百分比扩展后，结果行长于8191个字符.

The input line is too long. normally happens after a percent expansion with a resulting line longer than 8191 characters.

在您的情况下，可能是路径/includedir变量在添加某些内容后溢出.
此类问题的原因可能是该批处理文件的递归或多次调用.
然后您应该看到同一路径被附加了多次.

In your case it's probably a path/includedir variable overflowing after appending something.
The cause for such problems could be a recursion or multiple invocation of the batch file.
Then you should see that the same path was appended multiple times.

另一个问题可能是您的项目路径很长，例如 C:\ my疯狂的项目\被嵌套\到一个结构中\太深了\ ...< 2000个字符以后> \ myProject

Another problem could be that your project paths are very long, like C:\my insane Projects\are nested\into a structure\that is much too deep\...<2000 characters later>\myProject

检查您的 PATH 变量，有时它很长，而且有很多重复.

Check your PATH variable, sometimes it's ridiculous long with many repetitions.

要查找问题，请在 compilervars.bat 中添加一些 echo#123 以找到确切的行.
然后分析有问题的变量.

To find your problem, add some echo #123 into compilervars.bat to find the exact line.
Then analyse the problematic variable.

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