Yaourt e il bash_completion

Un saluto ai lettori! Per prima cosa ringrazio Furéster che ha scritto il post originale dal qual traggo spunto per questo.

Descrivo ora di cosa si tratta: Come intuibile dal titolo del post spiego un metodo per attivare il bash_completion per il noto programma di archLinux yaourt al quale , a differena dell’ufficiale pacman, manca proprio il completamento automatico dei pacchetti.

Per attivarlo seguite questa semlice procedura:

1) Aprite un terminale e digitate sudo nano /etc//bash_completion.d/yaourt

2) incollate il seguente codice:

# vim: set ft=sh ts=2 sw=2 et:
# file: /etc/bash_completion.d/yaourt

# Bash completion for yaourt
# Original: Igor Scabini
# adapted from bash_completion by Manolis Tzanidakis
#
# Distributed under the terms of the GNU General Public License, v2 or later.
#

## initial functions

rem_selected ()
{
# (Adapted from bash_completion by Ian Macdonald )
# This removes any options from the list of completions that have
# already been specified on the command line.
COMPREPLY=($(echo “${COMP_WORDS[@]}” |
(while read -d ‘ ‘ i; do
[ "${i}" == "" ] && continue
# flatten array with spaces on either side,
# otherwise we cannot grep on word boundaries of
# first and last word
COMPREPLY=” ${COMPREPLY[@]} “
# remove word from list of completions
COMPREPLY=(${COMPREPLY/ ${i%% *} / })
done
echo ${COMPREPLY[@]})))
return 0
}

_available_repos ()
{
COMPREPLY=( $( compgen -W “$(grep ‘[' /etc/pacman.conf | grep -v -e 'options' -e '^#' | tr -d '[]‘ )” — $cur ) )
}

_installed_pkgs ()
{
local installed_pkgs
installed_pkgs=$( ls /var/lib/pacman/local/ )
COMPREPLY=( $( compgen -W “$( for i in $installed_pkgs; do echo ${i%-*-*}; done )” — $cur ) )
}

_available_pkgs ()
{
#find balks easilly on a find /foo/*/* type dir, especially one like
# /var/lib/pacman/*/*
# This little change-up removes the find *and* only uses enabled repos
local available_pkgs
local enabled_repos
enabled_repos=$( grep ‘[' /etc/pacman.conf | grep -v -e 'options' -e '^#' | tr -d '[]‘ )
available_pkgs=$( for r in $enabled_repos; do echo /var/lib/pacman/sync/$r/*; done )
COMPREPLY=( $( compgen -W “$( for i in $available_pkgs; do j=${i##*/}; echo ${j%-*-*}; done )” — $cur ) )
}

_installed_groups ()
{
local installed_groups
installed_groups=$( find /var/lib/pacman/local -name desc -exec sed -ne ‘/%GROUPS%/,/^$/{//d; p}’ {} ; | sort -u )
COMPREPLY=( $( compgen -W “$( for i in $installed_groups; do echo ${i%-*-*}; done )” — $cur ) )
}

_available_groups ()
{
#find balks easilly on a find /foo/*/* type dir, especially one like
# /var/lib/pacman/*/*
# This little change-up removes the find *and* only uses enabled repos
local available_groups
local enabled_repos
enabled_repos=$( grep ‘[' /etc/pacman.conf | grep -v -e 'options' -e '^#' | tr -d '[]‘ )
available_groups=$( for r in $enabled_repos; do sed ‘/%GROUPS%/,/^$/{//d; p}’ /var/lib/pacman/sync/$r/*/desc | sort -u; done )
COMPREPLY=( $( compgen -W “$( for i in $available_groups; do echo ${i%-*-*}; done )” — $cur ) )
}

## makepkg completion

_makepkg ()
{
local cur prev
COMPREPLY=()
cur=${COMP_WORDS[COMP_CWORD]}
prev=${COMP_WORDS[COMP_CWORD-1]}

case “$prev” in
-p)
_filedir
return 0
;;
–help|–cleancache)
COMPREPLY=”
return 0
;;
esac

if [[ "$cur" == -* ]]; then
COMPREPLY=( $( compgen -W ‘
-A –ignorearch
-b –builddeps
-c –clean
-C –cleancache
-d –nodeps
-e –noextract
-f –force
-g –geninteg
-h –help
-i –install
-L –log
-m –nocolor
-o –nobuild
-p
-r –rmdeps
-s –syncdeps
–asroot
–source
–noconfirm
–noprogressbar’ — $cur ) )
fi

rem_selected
}
complete -o default -F _makepkg makepkg

## yaourt completion

_instring ()
{
str=”${1}”
shift 1
for c in “${@}”; do
if [ $(expr index "${str}" "${c}") -gt 0 ]; then
return 0
fi
done
return 1
}

_yaourt ()
{
local a arg toparse op mod cur
COMPREPLY=()

# This argument parsing is done so we can check for flag existance later
# right now it’s a tad crappy, but does the job
for (( i=1; i < ${#COMP_WORDS[@]}-1; i++ )); do
a=${COMP_WORDS[i]}
arg=”${a:0:2}”
toparse=”${a:2}”

case “${arg}” in
-@(A|U|R|S|Q|h|V))
op=”${arg/-}”
mod=”${mod}${a:2}”
;;
–)
arg=”${a:2}”
case “${arg}” in
add) op=”A” ;;
remove) op=”R” ;;
upgrade) op=”U” ;;
query) op=”Q” ;;
sync) op=”S” ;;
help) op=”h” ;;
version) op=”V” ;;
verbose) mod=”${mod}v” ;;
root) mod=”${mod}r” ;;
dbpath) mod=”${mod}b” ;;
nodeps) mod=”${mod}d” ;;
force) mod=”${mod}f” ;;
groups) mod=”${mod}g” ;;
info) mod=”${mod}i” ;;
list) mod=”${mod}l” ;;
print-uris) mod=”${mod}p” ;;
search) mod=”${mod}s” ;;
sysupgrade) mod=”${mod}u” ;;
upgrades) mod=”${mod}u” ;;
downloadonly) mod=”${mod}w” ;;
refresh) mod=”${mod}y” ;;
changelog) mod=”${mod}c” ;;
deps) mod=”${mod}d” ;;
explicit) mod=”${mod}e” ;;
unrequired) mod=”${mod}t” ;;
foreign) mod=”${mod}m” ;;
owns) mod=”${mod}o” ;;
file) mod=”${mod}p” ;;
search) mod=”${mod}s” ;;
upgrades) mod=”${mod}u” ;;
cascade) mod=”${mod}c” ;;
dbonly) mod=”${mod}k” ;;
nosave) mod=”${mod}n” ;;
recursive) mod=”${mod}s” ;;
esac ;;
*) toparse=”${a}” ;;
esac

arglen=$(( ${#toparse}-1 ))
for c in $(seq 0 “${arglen}”); do
arg=${toparse:$c:1}
[ "${arg}" != "-" ] && mod=”${mod}${arg}”
done
done

cur=${COMP_WORDS[COMP_CWORD]}

if [ $COMP_CWORD -eq 1 ] && [[ "$cur" == -* ]]; then
COMPREPLY=( $( compgen -W ‘
-A –add
-h –help
-Q –query
-R –remove
-S –sync
-U –upgrade
-V –version
‘ — $cur ) )
rem_selected
return 0
fi

if [[ "$cur" == -* ]]; then
case “${op}” in
A|U)
COMPREPLY=( $( compgen -W ‘
–asdeps
-d –nodeps
-f –force
-h –help
–config
–logfile
–noconfirm
–noprogressbar
–noscriptlet
-v –verbose
-r –root
-b –dbpath
–cachedir
‘ — $cur ) )
return 0
;;
R)
COMPREPLY=( $( compgen -W ‘
-c –cascade
-d –nodeps
-h –help
-k –dbonly
-n –nosave
-s –recursive
–config
–logfile
–noconfirm
–noprogressbar
–noscriptlet
-v –verbose
-r –root
-b –dbpath
–cachedir
‘ — $cur ) )
return 0
;;
S)
COMPREPLY=( $( compgen -W ‘
–asdeps
-c –clean
-d –nodeps
-e –dependsonly
-f –force
-g –groups
-h –help
-i –info
-l –list
-p –print-uris
-s –search
-u –sysupgrade
-w –downloadonly
-y –refresh
–needed
–ignore
–ignoregroup
–config
–logfile
–noconfirm
–noprogressbar
–noscriptlet
-v –verbose
-r –root
-b –dbpath
–cachedir
‘ — $cur ) )
return 0
;;
Q)
COMPREPLY=( $( compgen -W ‘
-c –changelog
-d –deps
-e –explicit
-g –groups
-h –help
-i –info
-l –list
-m –foreign
-o –owns
-p –file
-s –search
-t –unrequired
-u –upgrades
–config
–logfile
–noconfirm
–noprogressbar
–noscriptlet
-v –verbose
-r –root
-b –dbpath
–cachedir
‘ — $cur ) )
return 0
;;
esac
rem_selected
else
case “${op}” in
A|U)
COMPREPLY=( $( compgen -d — “$cur” )
$( compgen -f -X ‘!*.pkg.tar.gz’ — “$cur” ) )
return 0
;;
h|V)
COMPREPLY=”
return 0
;;
Q)
if _instring $mod g; then
_installed_groups
elif _instring $mod o; then
COMPREPLY=( $( compgen -d — “$cur” )
$( compgen -f — “$cur” ) )
elif _instring $mod p; then
COMPREPLY=( $( compgen -d — “$cur” )
$( compgen -f -X ‘!*.pkg.tar.gz’ — “$cur” ) )
elif _instring $mod u; then
COMPREPLY=”
return 0
else
_installed_pkgs
fi
return 0
;;
R)
_installed_pkgs
return 0
;;
S)
if _instring $mod l; then
_available_repos
else
_available_pkgs
fi
return 0
;;
esac
fi

rem_selected
}
complete -o filenames -F _yaourt yaourt

3) Salvate e per attivare il completamento lanciate source /etc/profile

Questo è tutto. Ciao alla prossima