CLEARCASE_XPN在clearcase命令中未解析为变量 [英] CLEARCASE_XPN not parsed as variable in clearcase command

问题描述

我遇到一个问题，当我运行clearcase命令时：

I meet a problem that when I run clearcase command:

ct find . -branch 'brtype(my_branch)' -exec "echo %CLEARCASE_XPN%"`

％CLEARCASE_XPN％未解析为变量，输出为：

%CLEARCASE_XPN% not parsed as a variable and the output is:

%CLEARCASE_XPN%
%CLEARCASE_XPN%
%CLEARCASE_XPN%
...

但是我确定 CLEARCASE_XPN 是该变量表示找到的文件的整个路径。

有人可以帮忙吗？操作系统是linux，外壳是tcsh，谢谢！

But I'm sure CLEARCASE_XPN is the variable denotes the whole path of the found file.
Can anybody help? OS is linux, shell is tcsh, thanks!

推荐答案

使用：

ct find . -branch 'brtype(my_branch)' -exec 'echo $CLEARCASE_XPN'

％CLEARCASE_XPN％是Windows语法。

%CLEARCASE_XPN% is a windows syntax.

$ CLEARCASE_XPN 是unix语法，您可以在Linux tcsh会话中使用。

$CLEARCASE_XPN is the unix syntax, that you can use in your Linux tcsh session.

请参见 cleartool find 和 cleartool find命令的其他示例 UNIX语法的示例。

See "cleartool find" and "Additional examples of the cleartool find command" for many examples using the unix syntax.

还要注意在exec指令周围使用简单的引号： -exec'echo $ CLEARCASE_XPN '。

这将防止外壳程序本身立即解释 $ CLEARCASE_XPN 变量（这对于tcsh会话是未知的），并将允许cleartool查找将正确的 value 传递给exec指令，将 $ CLEARCASE_XPN 替换为扩展名路径名。

Note also the use of simple quotes around the exec directive: -exec 'echo $CLEARCASE_XPN'.
That will prevent the shell itself to interpret immediately the $CLEARCASE_XPN variable (which is unknow for the tcsh session) and will allow the cleartool find to pass the right value to the exec directive, replacing $CLEARCASE_XPN with the extended pathname.

请参见 字符串引用（单引号）与弱引用（双引号）：

• 强引号可以防止字符具有特殊含义，因此，如果将字符放在单引号中，则会看到得到的结果。
  
  因此，如果不确定是否字符是否是特殊字符，请使用强引号。

• Strong quoting prevents characters from having special meanings, so if you put a character inside single quotes, what you see is what you get.
  Therefore, if you are not sure if a character is a special character or not, use strong quotation marks.

弱引号将大多数字符视为纯字符，但允许某些字符（或更确切地说是元字符）具有特殊含义。如前面的示例所示，双引号内的反斜杠是一个特殊的元字符。

它表示下一个字符不是，因此可以在反斜杠之前和双引号之前使用，转义特殊含义。

在双引号中允许使用其他两个元字符：美元符号和反引号。

Weak quotation marks treat most characters as plain characters, but allow certain characters (or rather meta-characters) to have a special meaning. As the earlier example illustrates, the backslash within double quotation marks is a special meta-character.
It indicates the next character is not, so it can be used before a backslash and before a double quotation mark, escaping the special meaning.
There are two other meta-characters that are allowed inside double quotation marks: the dollar sign, and the back quote.

这篇关于CLEARCASE_XPN在clearcase命令中未解析为变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！