Windows 命令行：不评估环境变量
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Windows Command Line: Non Evaluation of Environment Variable
提问by marcj
I would like to provide the raw text referring to an environment variable to a command instead of evaluating the environment variable.
我想将引用环境变量的原始文本提供给命令，而不是评估环境变量。
I need this to configure BizTalk from the command line, for example:
我需要这个来从命令行配置 BizTalk，例如：
BTSTask.exe AddResource -ApplicationName:App1 -Type:System.BizTalk:BizTalkAssembly -Overwrite -Source:..\Schemas\bin\development\App1.Schemas.dll -Destination:%BTAD_InstallDir%\App1.Schemas.dll
BTSTask.exe AddResource -ApplicationName:App1 -Type:System.BizTalk:BizTalkAssembly -Overwrite -Source:..\Schemas\bin\development\App1.Schemas.dll -Destination:%BTAD_InstallDir%\App1.Schemas.dll
This command adds a resource to a BizTalk application. I want the destination to be %BTAD_InstallDir%\App1.Schemas.dll, however at present it is evaluating the environment variable (to nothing) and using \App1.Schemas.dll.
此命令将资源添加到 BizTalk 应用程序。我希望目标是 %BTAD_InstallDir%\App1.Schemas.dll，但是目前它正在评估环境变量（无）并使用 \App1.Schemas.dll。
Is it possible to escape or disable the evaluation of this environment variable while parsing\executing this command?
在解析\执行此命令时是否可以转义或禁用此环境变量的评估？
I have tried escaping the first and both percentage characters with a carrot (^), however this did not stop the evaluation.
我曾尝试用胡萝卜 (^) 转义第一个和两个百分比字符，但这并没有停止评估。
[EDIT]When I execute this at the command prompt it doesn't replace the environment variable, however it does when I run it as a script, any thoughts as to why this is different?
[编辑]当我在命令提示符下执行它时，它不会替换环境变量，但是当我将它作为脚本运行时会替换，关于为什么会有所不同的任何想法？
采纳答案by VonC
Did you try:
你试过了吗：
%%BTAD_InstallDir%%
in your script ?
在你的脚本中？
That should prevent the script to interpret the variable, and it would pass %BTAD_InstallDir%to the program.
这应该会阻止脚本解释变量，它会传递%BTAD_InstallDir%给程序。
回答by Autodidact
Try echo ^%path^% in a command prompt it prints...
在它打印的命令提示符中尝试 echo ^%path^% ...
path
小路
instead of expanding the environment variable so I guess the following should work for you as suggested by Mikeage
而不是扩展环境变量，所以我想以下内容应该适用于 Mikeage 的建议
BTSTask.exe AddResource -ApplicationName:App1 -Type:System.BizTalk:BizTalkAssembly -Overwrite -Source:..\Schemas\bin\development\App1.Schemas.dll -Destination:^%BTAD_InstallDir^%\App1.Schemas.dll
BTSTask.exe AddResource -ApplicationName:App1 -Type:System.BizTalk:BizTalkAssembly -Overwrite -Source:..\Schemas\bin\development\App1.Schemas.dll -Destination:^%BTAD_InstallDir^%\App1.Schemas.dll
回答by Mikeage
Try ^% instead of %.
尝试 ^% 而不是 %。
回答by PhiLho
Tried:
尝试过：
C:\PrgCmdLine\Unix\echo.exe "%"JAVA_HOME"%"
Got:
得到了：
%JAVA_HOME%
[EDIT] Indeed, C:\PrgCmdLine\Unix\echo.exe ^%JAVA_HOME^%works too, and is simpler...
[编辑] 确实，C:\PrgCmdLine\Unix\echo.exe ^%JAVA_HOME^%也能用，而且更简单……
[EDIT 2] For the record: I used UnxUtils' echo to have the behavior of a plain program. Built in echo has a slightly different behavior, at least for quoted % signs.
[编辑 2] 作为记录：我使用 UnxUtils 的 echo 来获得普通程序的行为。内置 echo 的行为略有不同，至少对于引用的 % 符号。
回答by Kristof
Not sure if it's the same as my case, but i was troubling to use a batch file to create a script which has %temp% variable inside. The workaround i found: set test=%temp; echo {command} %test%%>>path_to_my_batch_file; Hope this helps someone:)
不确定它是否与我的情况相同，但我很难使用批处理文件来创建一个内部包含 %temp% 变量的脚本。我发现的解决方法：set test=%temp; 回声 {命令} %test%%>>path_to_my_batch_file; 希望这对某人有帮助:)
