如何使用指定命令的目录名称中的空格从PowerShell调用CMD.EXE

Question

我有以下PowerShell脚本来验证我的SVN存储库:

$SVNAdminDir = 'C:\Program Files (x86)\VisualSVN Server\bin';
$RepositoryDir = 'C:\My Repositories\App1';
$_cmd = "`"$SVNAdminDir`\svnadmin`" verify `"$RepositoryDir`"";
Write-Host $_cmd; # Copying this into the command prompt runs without an issue...
cmd.exe /c $_cmd; # It's when I try to execute the command from PS that I get the error.

但是当我尝试执行它时,我收到以下错误消息:

cmd.exe : 'C:\Program' is not recognized as an internal or external command,
At line:5 char:12
+     cmd.exe <<<<  /c $_cmd;
    + CategoryInfo          : NotSpecified: ('C:\Program' is...ternal command,:String) [],     RemoteException
    + FullyQualifiedErrorId : NativeCommandError

operable program or batch file.

由于我基本上$cmd = '"C:\Program Files (x86)\VisualSVN Server\bin\svnadmin" verify "C:\My Repositories\App1"';使用单引号内的双引号进行设置,因此我希望正确传递C:\ Program Files(x86)\ ...中的空格.

我怀疑我错过的字符串有些微不足道......

Answer 1

你需要cmd.exe像这样打电话:

cmd.exe /c "`"$_cmd`""

您发送到的命令cmd.exe需要完全包装在它们自己的引号中,而不仅仅是作为这些命令的一部分的空格路径.这与Powershell如何解析字符串有关,它需要传递文字引号,cmd.exe以便它自己正确地解析双引号的内容.

例如,如果您已经在cmd.exe会话中并设置了如下变量:

C:\>set _cmd="C:\Program Files (x86)\VisualSVN Server\bin\svnadmin" verify "C:\My Repositories\App1"

然后只需在命令行扩展该变量即可:

C:\>%_cmd%

但是,如果将其传递给新cmd.exe会话,则还需要额外的引号:

C:\>cmd.exe /c "%_cmd%"