#!/bin/bash
# Copyright (C) 2014 Ian Kelling

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# basic yum/apt package manager abstraction, plus a few minor conveniences
if type -p yum > /dev/null; then
    # package manager
    p() {
        local x
        [[ $EUID == 0 ]] && x=sudo
        $x yum "$@"
    }
    # package install
    pi() {
        local x
        [[ $EUID == 0 ]] && x=sudo
        $x yum -y install "$@"
    }
    # package find
    pf() {
        local x
        [[ $EUID == 0 ]] && x=sudo
        $x yum search "$@"
    }
    # package remove/uninstall
    pu() {
        local x
        [[ $EUID == 0 ]] && x=sudo
        $x yum autoremove "$@"
    }
    pup() { # upgrade
        local x
        [[ $EUID == 0 ]] && x=sudo
        $x yum -y distro-sync full
    }
    # package list info
    pl() {
        yum info "$@"
    }
    
else
    p() {
        local x
        [[ $EUID == 0 ]] && x=sudo
        $x aptitude "$@"
    }
    pi() {
        local x
        [[ $EUID == 0 ]] && x=sudo
        # update package list if its more than an hour old
        if (( $(( $(date +%s) - $(stat -c %Y /var/lib/apt/periodic/update-success-stamp) )) > 60*60 )); then
            $x aptitude update
        fi
        $x aptitude -y install "$@"
    }
    pf() {
        # scratch a very annoying itch.
        # package description width as wide as the screen, and package name field small
        # aptitude manual can't figure out how wide emacs terminal is,
        # of course it doesn't consult the $COLUMNS variable...
        # and in a normal terminal, it makes the package name field ridiculously big
        # also, remove that useless dash before the description
        local x
        [[ $EUID == 0 ]] && x=sudo
        $x aptitude -F "%c%a%M %p %$((COLUMNS - 30))d" -w $COLUMNS search "$@"
    }
    pu() {
        local x
        [[ $EUID == 0 ]] && x=sudo
        $x aptitude -y purge "$@"
    }
    pup() { # upgrade
        local x
        [[ $EUID == 0 ]] && x=sudo
        $x aptitude -y full-upgrade "$@"
    }
    # package info
    pl() {
        aptitude show "$@"
    }
    
fi