How to ignore part of command. eg: tsh ssh root@**

[EliottGoye]

Hi there,

I am trying to implement a fzf custom completion script for the tsh CLI that works pretty much like ssh and I would like to ignore the text right before the **

Example :

tsh ssh root@**

Actually the root@ part is within the search. Is it possible to remove the user from the search so I can search from hosts ?

My completion script at the moment :

_fzf_complete_tsh() {
    ARGS="$*"
    if [[ $ARGS == 'tsh ssh'* ]]; then
        _fzf_complete --height=60% --info=inline --border --margin=1 --padding=1 -- "$@" < <( tsh ls -f names 
        )     
    else  
        eval "zle ${fzf_default_completion:-expand-or-complete}"
    fi    
}

[LangLangBart]

# see explanation in "man fzf"
echo "tsh ssh root@**test1\ntsh ssh root2@**test2" | fzf --delimiter @ --with-nth 2..

[EliottGoye]

I don't want to ignore part of the input, but part of arguments, the root@ part.

I'm using this part of the docs :
https://github.com/junegunn/fzf#custom-fuzzy-completion

I also noticed the fzf custom completion script does not use the --query parameter

Example:

_fzf_complete_tsh() {
 _fzf_complete --query "toto" --height=60% --info=inline --border --margin=1 --padding=1 -- "$@" < <( tsh ls -f names )
}

I was thinking about getting the user root@ from the arguments, remove it from the search with --query="" and re-add it with a post-process command

Here is an example tsh ls -f names output :

> tsh ls -f names

ansible
backup-server
dev-mariadb1
dev-mariadb2
dev-mariadb3
integration1
integration2
integration3
integration4
integration5

[junegunn]

does not use the --query parameter

The completion function overrides your --query with -q "${(Q)prefix}".

fzf/shell/completion.zsh

Line 211 in 9499910

matches=$(FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-} $str_arg" __fzf_comprun "$cmd" "${args[@]}" -q "${(Q)prefix}" < "$fifo" | $post | tr '\n' ' ')

So, if you want to remove it, you can clear the initial --query with clear-query binding like so

--bind start:clear-query

[EliottGoye]

Thanks !
Had to upgrade my version of fzf but that did the trick !

_fzf_complete_tsh() {
 _fzf_complete --bind start:clear-query --height=60% --info=inline --border --margin=1 --padding=1 -- "$@" < <( tsh ls -f names )
}

Now I'm searching for a way to get the dropped initial query into a var so I can use it in a post script

# User hardcoded
_fzf_complete_tsh_post() {
  awk '{print "root@"$NF}'
}

# What I'd like to have
_fzf_complete_tsh_post() {
  awk '{print "${tsh_user}@"$NF}'
}

[junegunn]

I would store the query string in a temporary file and read it in the post function. e.g. --bind 'start:execute-silent(echo {q} > /tmp/q)+clear-query'

[EliottGoye]

Wow, the --bind=EVENT can do so much more than I imagined !

Here is my code atm :

_fzf_complete_tsh() {
    ARGS="$*"
    if [[ $ARGS == 'tsh ssh'* ]]; then
            _fzf_complete --bind 'start:execute-silent(echo {q} > /tmp/tsh_user)+clear-query' --height=60% --info=inline --border --margin=1 --padding=1 -- "$@" < <( tsh ls -f names )
    else  
        eval "zle ${fzf_default_completion:-expand-or-complete}"
    fi    
}

_fzf_complete_tsh_post() {
  awk -v user=$(cat /tmp/tsh_user) '{print user $NF}'
}

Weird thing, when the post function runs, it returns the user from the previous completion.
I've watched the file to check if there was some latency, but no. Strange behavior.