使用NSIS更新％PATH％环境变量 [英] Update %PATH% environment variable using NSIS

问题描述

我读到超过$ {NSIS_MAX_STRLEN} (1024)的字符串将被截断/损坏."

I read that "Strings longer than ${NSIS_MAX_STRLEN} (1024) will get truncated/corrupted."

如何安全更新％PATH％环境变量?

推荐答案

您可以从特殊构建页面，例如构建大字符串，它定义了NSIS_MAX_STRLEN=8192并应防止您破坏主机路径.

You can use an alternative NSIS build from the special builds page like the large strings build that defines NSIS_MAX_STRLEN=8192 and should prevent you from breaking the host path.

在实践中，在一台台式计算机上，1024字节似乎足够了，但是在安装了许多工具的开发主机上(例如我的)，该路径在操作后可能会中断，而8192字节的字符串构建从未扰乱我的计算机.

In practice, on a desktop machine, 1024 byte seems enough, but on a development host with many tools installed (like mine), the path might be broken after manipulation, while the 8192 bytes strings build had never perturbed my machine.

非常肯定的是，您可以在操作之前添加对路径长度的检查，并在尝试操作之前将路径接近NSIS_MAX_STRLEN常量的情况下中止安装程序并显示一条消息.

To be very sure, you can add a check on the path length before manipulation and abort the installer with a message in the case where the path would be close to the NSIS_MAX_STRLEN constant before trying to manipulate it.

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