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shellzshhostnamezshrc

zsh prompt and hostname

I use the following prompt in .zshrc:

PROMPT="%{$fg[magenta]%}%n%{$reset_color%}@%{$fg[blue]%}%m %{$fg[yellow]%}%1~ %{$reset_color%}%# "

When I open terminal I see this prompt:

zoltan@zoltan-Macbook-Pro ~ %

Is it possible to drop the text "zoltan" in the hostname? I would like to make it look like this:

zoltan@Macbook-Pro ~ %

Any suggestion would be greatly appreciated. Thank you!

Solution

  • It's a bit of a mess, but you can pretend the %m is a parameter and use parameter expansion to strip the zoltan from the host name:

    PROMPT="...${${(%):-%m}#1} ..."

    A little explanation. First, you create a "parameter" expansion that doesn't actually have a parameter name; it just uses the text you provide as the "value":

    ${:-%m}

    Next, add the % expansion flag so that any prompt escapes found in the value are processed.

    ${(%):-%m}

    Finally, next it in a final expansion that uses the # operator to remove a prefix from the string:

    ${${(%):-%m}#zoltan-}

    You can tame your prompt a bit by building up piece by piece (and use zsh's prompt escapes to handle the color changes, rather than embedding terminal control sequences explicitly).

    PROMPT="%F{magenta}%n%f"  # Magenta user name
PROMPT+="@"
PROMPT+="%F{blue}${${(%):-%m}#zoltan-}%f" # Blue host name, minus zoltan
PROMPT+=" "
PROMPT+="%F{yellow}%1~ %f" # Yellow working directory
PROMPT+=" %# "