为什么zsh试图扩展*和bash不？

Question

我zsh在尝试使用logcat时遇到了以下错误.
即,输入时:

adb logcat *:D 

我在zsh中收到以下错误

zsh: no matches found: *:D

我不得不逃避*:

adb logcat \*:D 

使用bash时,我没有收到以下错误.
为什么会这样？

Answer 1

zsh如果你使用没有匹配的glob,默认情况下会警告你.另一方面,Bash将未展开的glob传递给app,如果您不确定哪些匹配(或者如果您犯了错误),则这是一个潜在的问题.您可以告诉zsh像bash一样传递未评估的参数setopt nonomatch:

   NOMATCH (+3) <C> <Z>
          If a pattern for filename generation has no  matches,  print  an
          error,  instead  of  leaving  it unchanged in the argument list.
          This also applies to file expansion of an initial `~' or `='.

或者删除参数,而不是setopt NULL_GLOB:

   NULL_GLOB (-G)
          If a pattern for filename generation has no matches, delete  the
          pattern  from  the  argument list instead of reporting an error.
          Overrides NOMATCH.

Bash实际上有相同的选项(setopt nullglob),并可以模拟zshsetopt failglob