如何在bash中从zsh模拟全局别名？

Question

In zsh , you can define global aliases. For example,

alias -g G='| grep'
alias -g W='| wc -l'

and then use them like this:

some_command G some_text W

Can global aliases be somehow emulated in bash ?

Answer 1

Assuming you never want to use capital G for any other purpose, you could add this to your .bashrc file:

bind '"G": "| grep"'

This will expand G to | grep | grep as soon as you type it. That is, Shift+g no longer produces a capital G, but the string | grep | grep . You'd want to choose a longer sequence that you would never expect to otherwise type, either by itself or as part of another word.

Answer 2

You can save it into a variable

g='| grep'

Then, your command could be

eval some_command $G some_text

OR

some_command $G some_text Ctrl + Alt + E (on other systems, it seems to be ? ctrl+x+* and is configurable)

which expands the command to the desired some_command | grep some_text some_command | grep some_text , so you can then press Enter. Variables that should not be expanded would have to be in single quotes.

Nothing like zsh though.