使用Windows命令行将多行环境变量回显到文本文件 [英] Echo a multi line environment variable to a text file using Windows Command Line

问题描述

我有一个环境变量％SSH_PRIVATE_KEY％，并希望使用命令行将其打印到文件中，而不使用批处理文件.这是因为我需要在Gitlab-Ci .yml脚本中使用此文件.

I have an environment variable %SSH_PRIVATE_KEY% and would like to print this to a file using the command line, without using a batch file. This is because I need to use this file in a Gitlab-Ci .yml script.

在Linux中，这很简单:

echo "$SSH_PRIVATE_KEY" > ~/.ssh/id_rsa 

这会生成:

-----BEGIN RSA PRIVATE KEY-----
DHHDpgIFFFFAQEA4s5JARKOiF/dfherreh/qeGLNaryra7rt927okJmonpJHyCbA5SRyjsST/oC
tJx+YJ0BaNbbHtpbjbMeWgqKPXNAIRng30TXCOLLKverteygerg/ererg/GVFfd5T1v/qY2rGCN
v9yHSw89upy8pA+HvAFFFFHDb2YUAgpyYMqCcZ3vGY0/NDBxQQwDKwrefqwef/wefweqe/wwALb 

以此类推.

但是，如果我尝试在Windows中:

echo "%SSH_PRIVATE_KEY%" >  C:\runner\builds\66092d15\0\myproject\.ssh\id_rsa

它生成以下输出:

"-----BEGIN RSA PRIVATE KEY-----

因为一旦到达％SSH_PRIVATE_KEY％中的换行符，它就会逃避echo命令.

Because as soon as it reaches the newline character in %SSH_PRIVATE_KEY% it escapes the echo command.

如何使用Windows命令行将完整的％SSH_PRIVATE_KEY％打印到文件?

How can I print the full %SSH_PRIVATE_KEY% to a file using the windows command line?

推荐答案

事实上，Blue7是正确的，但是当他/她被否决时，对于那些没有读过gitlab-ci的人来说，答案很长:

Actually Blue7 is right, but as he/she was down voted, here comes the long answer for anyone who did not read that this is gitlab-ci realted:

用于！要工作，必须启用DelayedExpansion，并且它似乎仅在批处理文件中起作用.在gitlab中，默认情况下就是这种情况.默认情况下，cmd将首先扩展环境变量，然后对其进行解释.因此，当您编写 echo％SSH_PRIVATE_KEY％" cmd实际上会看到

For ! to work DelayedExpansion must be enabled, and it seems to only work in batch-files. In gitlab this is the case by default. By default cmd will first expand the environment variable and then interpret it. Thus when you write echo "%SSH_PRIVATE_KEY%" cmd actually sees

echo "-----BEGIN RSA PRIVATE KEY-----
DHHDpgIFFFFAQEA4s5JARKOiF/dfherreh/qeGLNaryra7rt927okJmonpJHyCbA5SRyjsST/oC
...

是的，包括"！为避免这种情况，您需要启用后期扩展 setlocal EnableDelayedExpansion .在延迟扩展的情况下，环境变量会先扩展，然后再传递给环境变量.因此，也无需使用".搜索 EnableDelayedExpansion 将为您提供许多其他信息.

Yes, including the "! To avoid this, you need to enable late expansion setlocal EnableDelayedExpansion. With delayed expansion the environment variables are extended right before passing them to the application. Thus there is also no need for using ". Searching for EnableDelayedExpansion will provide you with lots of additional information.

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