英文:
NSIS compile-time command to calculate txt file and set result as global variable
问题
我是一个NSIS初学者，我需要一些帮助。我有一个包含许多行数字的txt文件。我想使用一个编译时命令（如!system或其他命令）来读取每一行的数字，将它们相加，并将总和转换为一个可以在脚本中使用的全局变量。有人能提出一个实现这个目标的好方法吗？非常感谢您的帮助！
我写了：
**`!system 'for /f "tokens=1" %a in (filesize.txt) do set /a sum+=%a'`**
这个命令成功运行了，我可以从编译日志中看到结果已经计算出来了。如何将命令行输出的计算结果转换为可以全局使用的变量？
英文:
I am a NSIS beginner and I need some help. I have a txt file which contains many rows of numbers. I want to use a compile-time command (such as !system or other) to read each line of numbers, add them together, and convert the sum into a global variable that can be used in the script. Can anyone suggest a good method to achieve this? Thank you very much in advance!
I wrote
!system 'for /f "tokens=1" %a in (filesize.txt) do set /a sum+=%a'
which ran successfully and I can see from the compile log that the result has been calculated. How can I convert the calculated result from the command line output to a variable that can be used globally?
答案1
得分: 0
以下是翻译后的内容：
必须将标准输出重定向到一个文件，然后您可以使用 !include 命令：
!tempfile STDOUT
!system 'echo StrCpy $0 1234 >> "${STDOUT}"'
!include "${STDOUT}"
!delfile "${STDOUT}"
!undef STDOUT
如果命令较为复杂，您可能需要创建一个批处理文件：
!tempfile BAT
!appendfile "${BAT}.bat" 'echo foo >> %1$\n'
!appendfile "${BAT}.bat" 'dir bar >> %1$\n'
!tempfile STDOUT
!system '"${BAT}.bat" "${STDOUT}"'
!delfile "${BAT}.bat"
!undef BAT
!include "${STDOUT}"
!delfile "${STDOUT}"
!undef STDOUT
英文:
You must redirect stdout to a file you can !include:
!tempfile STDOUT
!system 'echo StrCpy $0 1234 >> "${STDOUT}"'
!include "${STDOUT}"
!delfile "${STDOUT}"
!undef STDOUT
If the command is complex you might have to make a batch file:
!tempfile BAT
!appendfile "${BAT}.bat" 'echo foo >> %1$\n'
!appendfile "${BAT}.bat" 'dir bar >> %1$\n'
!tempfile STDOUT
!system '"${BAT}.bat" "${STDOUT}"'
!delfile "${BAT}.bat"
!undef BAT
!include "${STDOUT}"
!delfile "${STDOUT}"
!undef STDOUT
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