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Use bash completions in Fish Shell
#!/usr/bin/fish
# You can add this to your ~/.config/fish/config.fish
function __fish_complete_bash
set cmd (commandline -cp)
bash -c "source get-bash-completions.sh; get_completions '$cmd'"
end
# Set the tool to use bash completions
complete -xc git -a '(__fish_complete_bash)'
complete -xc gdbus -a '(__fish_complete_bash)'
complete -xc java -a '(__fish_complete_bash)'
# You could also apply this to all the completions, maybe ignoring the fish ones via
for completion in /usr/share/bash-completion/completions/*
complete -xc (basename $completion) -a '(__fish_complete_bash)'
end
#!/bin/bash
# Author: Brian Beffa <brbsix@gmail.com>
# Original source: https://brbsix.github.io/2015/11/29/accessing-tab-completion-programmatically-in-bash/
# License: LGPLv3 (http://www.gnu.org/licenses/lgpl-3.0.txt)
#
get_completions(){
local completion COMP_CWORD COMP_LINE COMP_POINT COMP_WORDS COMPREPLY=()
# load bash-completion if necessary
declare -F _completion_loader &>/dev/null || {
if [ -f /etc/bash_completion ]; then
source /etc/bash_completion
elif [ -f /usr/share/bash-completion/bash_completion ]; then
source /usr/share/bash-completion/bash_completion
fi
}
COMP_LINE=$*
COMP_POINT=${#COMP_LINE}
eval set -- "$@"
COMP_WORDS=("$@")
# add '' to COMP_WORDS if the last character of the command line is a space
[[ ${COMP_LINE[@]: -1} = ' ' ]] && COMP_WORDS+=('')
# index of the last word
COMP_CWORD=$(( ${#COMP_WORDS[@]} - 1 ))
# load completion
_completion_loader "$1"
# detect completion
completion=$(complete -p "$1" 2>/dev/null | awk '{print $(NF-1)}')
# ensure completion was detected
[[ -n $completion ]] || return 1
# execute completion function
"$completion"
# print completions to stdout
for ((i = 0; i < ${#COMPREPLY[@]}; i++)); do
echo "${COMPREPLY[$i]%%*( )}"
done
}
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