通过类似开关的参数循环批处理文件？ [英] Batch file for loop through switch-like arguments?

问题描述

我通过我传递给一个批处理文件的参数试图循环。根据的说法，我想设置一个变量的标志真或假供以后使用脚本

I'm trying to loop through the arguments that I am passing to a batch file. Based on the argument, I want to set a variable flag true or false for use later in the script

所以我的命令是myscript.bat / U / P / S

So my command is "myscript.bat /u /p /s"

和我的code是：

FOR /f %%a IN ("%*") DO (
  IF /I "%%a"=="/u" SET UPDATE=Y
  IF /I "%%a"=="/p" SET PRIMARY=Y
  IF /I "%%a"=="/s" SET SECONDARY=Y
)

它只是如果我有一个参数，它告诉我，这是越来越参数的整个列表作为一个参数工作。我已经试过delims =，但无济于事。在得到每个间隔参数有什么想法？

It only works if i have a single argument, which tells me that it is getting the entire list of arguments as a single argument. I've tried "delims= " but to no avail. Any thoughts on getting each spaced argument?

怎么样增加一个值PARAMS之一？

What about adding a value to one of the params?

myscript.bat / U / P / D测试/ S

myscript.bat /u /p /d TEST /s

:loop
IF "%~1"=="" GOTO cont
IF /I "%~1"=="/u" SET UPDATE=Y
IF /I "%~1"=="/p" SET PRIMARY=Y
IF /I "%~1"=="/s" SET SECONDARY=Y
IF /I "%~1"=="/d" SHIFT & SET DISTRO="%~1"
SHIFT & GOTO loop

:cont

不过，与过去的IF内联来了SHIFT实际上并没有任何转变。 DISTRO最终被/ D代替TEST

But the SHIFT that comes inline with the last IF doesn't actually shift anything. DISTRO ends up being "/d" instead of "TEST"

推荐答案

您可以遍历使用SHIFT，GOTO和一个额外的IF参数，以检查是否有没有更多的参数解析：

You could loop over the arguments using SHIFT, GOTO and an extra IF to check if there are no more parameters to parse:

:loop
IF "%~1"=="" GOTO cont
IF /I "%~1"=="/u" SET UPDATE=Y
IF /I "%~1"=="/p" SET PRIMARY=Y
IF /I "%~1"=="/s" SET SECONDARY=Y
SHIFT & GOTO loop

:cont
...

---

更新（解决的情况下，当一个参数都有自己的一个参数）

---

UPDATE (addressing the case when a parameter has an argument of its own)

在IF语句的转变，检查 /天确实工作。问题是，整条生产线是在一次评估和两个实例％〜1 被替换为同一个值，这是 /天在这一点上。

The SHIFT in the IF statement that checks for /d does work. The issue is that the entire line is evaluated at once and both instances of %~1 get replaced with the same value, which is /d at that point.

所以，基本上在这种情况下，解决办法是分别从导致跨preTER评估 SET DISTRO =％〜1部分 IF / I％〜1==/ D。可以有各种方法来此。例如，你可以简单地移动 SHIFT＆安培; SET DISTRO =％〜1到下一行，并跳过它，如果％〜1 是的不的 /天：

So, basically the solution in this case would be to cause the interpreter to evaluate the SET DISTRO="%~1" part separately from the IF /I "%~1"=="/d". There can be various approaches to this. For instance, you could simply move SHIFT & SET DISTRO="%~1" to the next line and skip it if %~1 is not /d:

...
IF /I NOT "%~1"=="/d" GOTO skip_d
SHIFT & SET "DISTRO=%~1"
:skip_d
...

另一种方法可以指定特定值（如？）以 DISTRO 当 /天遇到。然后，在下一行，检查 DISTRO 有特殊的价值，并将其设置为％〜1 ：

Another method could be to assign a special value (e.g. a ?) to DISTRO and shift when /d is encountered. Then, on the next line, check if DISTRO has that special value and set it to %~1:

...
IF /I "%~1"=="/d" SHIFT & SET DISTRO=?
IF "%DISTRO%"=="?" SET "DISTRO=%~1"
...

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