经与嵌套的IF麻烦在批处理文件 [英] Having trouble with nested IF in a batch file

问题描述

我正在对检查出从SVN项目的批处理文件。
我要求用户进入该目录，当你达到你想要的目录，键入结账，并检查出的项目目录。不过，我遇到一些麻烦低于code。请帮助。

I am making a batch file for checking out a project from SVN. I ask the user to enter the directory and when you reach the directory you want, you type checkout and it checks out that project directory. However, I am having some trouble with the code below. Please help.

if /i %choice%==1  ( 
cls
svn ls %svnroot_temp%
:top
set /p direct=Enter directory:
if %direct%=checkout( goto :checkout_area )
set svnroot_temp= %svnroot_temp%/%direct%
svn ls %svnroot_temp%
goto :top
)

我在哪里去错在这里？

Where am I going wrong here?

推荐答案

从不使用：标签也不 ::标签般的评论包含在命令块（）括号内。 证明

Never use :label nor :: label-like comment inside a command block enclosed in () parentheses. Proof:

@ECHO %1>NUL
if "" == "" (
    @echo a simple echo, no comments
)
if ""=="" (
  @echo a rem comment follows this echo command
  rem comment
  @echo a rem comment precedes this echo command
)
if ""=="" (
  @echo a label-like comment follows this echo command
  :: comment
  @echo a label-like comment precedes this echo command
)
if ""=="" (
  @echo a label follows this echo command
  :label
  @echo a label precedes this echo command
)

输出

==>D:\bat\labels.bat OFF
a simple echo, no comments
a rem comment follows this echo command
a rem comment precedes this echo command
a label-like comment follows this echo command
'@echo' is not recognized as an internal or external command,
operable program or batch file.
a label follows this echo command
'@echo' is not recognized as an internal or external command,
operable program or batch file.

==>

下一步code段应按预期工作，如果我能理解你的目标是：

Next code snippet should work as expected, if I can understand your aim:

SETLOCAL enableextensions

rem (set `svnroot_temp` and `choice` variables here)

if /i "%choice%"=="1"  ( 
    cls
    svn ls %svnroot_temp%
    call :top
)
goto :eof

:top
set /p direct=Enter directory:
if /I "%direct%"=="checkout" goto :checkout_area
set "svnroot_temp=%svnroot_temp%\%direct%"
svn ls %svnroot_temp%
goto :top

:checkout_area

请注意，在如果/我直接％％==结账转到相比，两者前pressions：checkout_area 括在双引号中的任何用户输入可能包含空格，甚至可以留空。

不知道在引用的svn ls的％svnroot_temp％。

Note that both compared expressions in if /I "%direct%"=="checkout" goto :checkout_area are enclosed in double quotes as any user input could contain a space or even could stay empty.
Not sure about quoting in svn ls "%svnroot_temp%".

不知道是否％svnroot_temp％是 SVN LS输入或输出目录命令：

• 在的情况下输入：检查使用，如果不存在％svnroot_temp％\\％直接％\\转到：顶部的前的通过改变它设置svnroot_temp =％svnroot_temp％\\％直接％


• 在输出的情况下：使用创建 MD％svnroot_temp％2 - ; NUL 的之后的改变它

• in case input: check it using if not exist "%svnroot_temp%\%direct%\" goto :top before changing it by set "svnroot_temp=%svnroot_temp%\%direct%"
• in case output: create it using MD "%svnroot_temp%" 2>NUL after changing it.

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