bash-completion: complete 'clean|groups|repolist' using help (v2)

[ignatenkobrain]

Reported-by: Parag Nemade pnemade@redhat.com
Reference: #159 (comment)

[pnemade]

cool this worked fine for me now. 👍

[ignatenkobrain]

Now we use only bash built-in functions. it's more faster than sed/perl

[ignatenkobrain]

Function to parse written on some programming languages

bash built-in

_dnf_help_command()
{
    local cmd=$( dnf help $1 | grep -E "^$1" | tr "|" " " )
    cmd=${cmd#*[} && cmd=${cmd%%]*}
    eval "$2='$cmd'"
}

perl

_dnf_help_command()
{
    eval "$2='$( dnf help $1 | perl -ne "next unless /^$1/; s|.*?\[(.*?)\].*|\1|g; s/\|/ /g; print; exit" )'"
}

sed

_dnf_help_command()
{
    eval "$2='$( dnf help $1 | grep -E "^$1" | sed -e "s/|/ /g" -e "s/^$1 \[//g" -e "s/\].*$//g" )'"
}

python

_dnf_help_command()
{
    eval "$2='$( dnf help $1 | python -c "import sys,re; [[sys.stdout.write(m.replace("|", " ")) for m in re.findall('${1} \[(.*?)\]', line)] for line in sys.stdin]" )'"
}

[akozumpl]

Thanks!