The CBSD project provides command autocompletion scripts under Zsh but not under Bash. In this case, I decided to write one myself and collaborate a little with the project. These scripts are not overly complex, in a few hours we can have something moderately functional and its usefulness is incalculable.
The script has been incorporated into the project repository after the developer’s approval:
https://github.com/cbsd/cbsd/tree/develop/share/autocompletion/bash
Only the autocompletion of the most used commands has been programmed, if someone decides to improve it, they can always send a pull request to the developer and if everything is in order, it will be incorporated into the code.
I leave the code here as a tutorial for autocompletion scripts in Bash.
_cbsd () {
# Remove = from COMP_WORDBREAKS because it is used when jname= commands
COMP_WORDBREAKS=${COMP_WORDBREAKS/\=/}
local cur
# cur: Current word where cursor is located
cur=${COMP_WORDS[COMP_CWORD]}
# We only get CBSD subcomand list if there is not already one defined
if [ ${#COMP_WORDS[@]} -eq 2 ]; then
# Show only the options that start with $cur
COMPREPLY=( $( compgen -W "$( cbsd help nodesc|sed -r '/^\s*$/d'|grep -v ' ' )" -- $cur ) )
return 0
# If we have the subcommand, we check for arguments only for some common used commands
elif [ ${#COMP_WORDS[@]} -eq 3 ]; then
case ${COMP_WORDS[1]} in
bconfig)
VMS=$(env NOCOLOR=1 cbsd bls display=jname header=0|awk '{print"jname="$1}'|tr -s '\n' ' ')
COMPREPLY=( $( compgen -W "$VMS" -- $cur ) )
;;
blogin)
VMS=""
N=$(env NOCOLOR=1 cbsd bls display=jname header=0|wc -l|awk '{print$1}')
for I in $(seq 1 $N); do
STATE=$(env NOCOLOR=1 cbsd bls display=status header=0|tail -n $I|head -n 1)
if [ "$STATE" == "On" ]; then
VM=$(env NOCOLOR=1 cbsd bls display=jname header=0|tail -n $I|head -n 1)
if [ "$VMS" == "" ]; then
VMS=$VM
else
VMS="$VMS $VM"
fi
fi
done
COMPREPLY=( $( compgen -W "$VMS" -- $cur ) )
;;
bstart)
VMS=""
N=$(env NOCOLOR=1 cbsd bls display=jname header=0|wc -l|awk '{print$1}')
for I in $(seq 1 $N); do
STATE=$(env NOCOLOR=1 cbsd bls display=status header=0|tail -n $I|head -n 1)
if [ "$STATE" == "Off" ]; then
VM=$(env NOCOLOR=1 cbsd bls display=jname header=0|tail -n $I|head -n 1)
if [ "$VMS" == "" ]; then
VMS=$VM
else
VMS="$VMS $VM"
fi
fi
done
COMPREPLY=( $( compgen -W "$VMS" -- $cur ) )
;;
bstop)
VMS=""
N=$(env NOCOLOR=1 cbsd bls display=jname header=0|wc -l|awk '{print$1}')
for I in $(seq 1 $N); do
STATE=$(env NOCOLOR=1 cbsd bls display=status header=0|tail -n $I|head -n 1)
if [ "$STATE" == "On" ]; then
VM=$(env NOCOLOR=1 cbsd bls display=jname header=0|tail -n $I|head -n 1)
if [ "$VMS" == "" ]; then
VMS=$VM
else
VMS="$VMS $VM"
fi
fi
done
COMPREPLY=( $( compgen -W "$VMS" -- $cur ) )
;;
bremove)
VMS=$(env NOCOLOR=1 cbsd bls display=jname header=0|tr -s '\n' ' ')
COMPREPLY=( $( compgen -W "$VMS" -- $cur ) )
;;
jconfig)
JAILS=$(env NOCOLOR=1 cbsd jls display=jname header=0|awk '{print"jname="$1}'|tr -s '\n' ' ')
COMPREPLY=( $( compgen -W "$JAILS" -- $cur ) )
;;
jlogin)
JAILS=""
N=$(env NOCOLOR=1 cbsd jls display=jname header=0|wc -l|awk '{print$1}')
for I in $(seq 1 $N); do
STATE=$(env NOCOLOR=1 cbsd jls display=status header=0|tail -n $I|head -n 1)
if [ "$STATE" == "On" ]; then
JAIL=$(env NOCOLOR=1 cbsd jls display=jname header=0|tail -n $I|head -n 1)
if [ "$JAILS" == "" ]; then
JAILS=$JAIL
else
JAILS="$JAILS $JAIL"
fi
fi
done
COMPREPLY=( $( compgen -W "$JAILS" -- $cur ) )
;;
jstart)
JAILS=""
N=$(env NOCOLOR=1 cbsd jls display=jname header=0|wc -l|awk '{print$1}')
for I in $(seq 1 $N); do
STATE=$(env NOCOLOR=1 cbsd jls display=status header=0|tail -n $I|head -n 1)
if [ "$STATE" == "Off" ]; then
JAIL=$(env NOCOLOR=1 cbsd jls display=jname header=0|tail -n $I|head -n 1)
if [ "$JAILS" == "" ]; then
JAILS=$JAIL
else
JAILS="$JAILS $JAIL"
fi
fi
done
COMPREPLY=( $( compgen -W "$JAILS" -- $cur ) )
;;
jstop)
JAILS=""
N=$(env NOCOLOR=1 cbsd jls display=jname header=0|wc -l|awk '{print$1}')
for I in $(seq 1 $N); do
STATE=$(env NOCOLOR=1 cbsd jls display=status header=0|tail -n $I|head -n 1)
if [ "$STATE" == "On" ]; then
JAIL=$(env NOCOLOR=1 cbsd jls display=jname header=0|tail -n $I|head -n 1)
if [ "$JAILS" == "" ]; then
JAILS=$JAIL
else
JAILS="$JAILS $JAIL"
fi
fi
done
COMPREPLY=( $( compgen -W "$JAILS" -- $cur ) )
;;
jremove)
JAILS=$(env NOCOLOR=1 cbsd jls display=jname header=0|tr -s '\n' ' ')
COMPREPLY=( $( compgen -W "$JAILS" -- $cur ) )
;;
*)
return 0
;;
esac
else
return 0
fi
}
complete -F _cbsd cbsd
To use the autocompletion, we can load the script manually or leave it in our .bashrc to do it automatically:
vi /root/.bashrc
source /root/CBSDCompletion.bash