bash-completion for liquibase

liqubase-completion.bash

#!/bin/bash

_liquibase()
{
    local cur=${COMP_WORDS[COMP_CWORD]}
    local prv=${COMP_WORDS[COMP_CWORD-1]}
    local opts cmds
    opts="$(liquibase --help 2>&1 | grep -e '^ --[a-z][a-zA-Z]*' -o)"
    cmds="$(liquibase --help 2>&1 | grep -e '^ [a-zA-Z]\+' -o)"

    if [[ $cmds =~ (^|[[:space:]])$prv($|[[:space:]]) ]]; then
        case "$prv" in
            status|unexpectedChangeSets)
                COMPREPLY=( $(compgen -W "--verbose" -- "$cur") )
            ;;
        esac
    else
        case "$cur" in
            -*)
                COMPREPLY=( $(compgen -W "$opts" -- "$cur") )
                ;;
            *)
                COMPREPLY=( $(compgen -W "$cmds" -- "$cur") ) 
                ;;
        esac
    fi

    return 0
}

complete -o default -F _liquibase liquibase