debian dependency tree

apt-rdepends-tree

#! /bin/bash
# Description: show dependency tree
# Author: damphat, bykva

if [ $# != 1 ]; then
        echo 'Usage: apt-rdepends-tree <package>'
        echo 'Required packages: apt-rdepends'
        exit 1
fi

# tree template
T1="    ├─"
T2="    │    ├─"
T3="    │    └─"

# tree template for last node
T4="    └─"
T5="         ├─"
T6="         └─"

# mark '1' for parent node, '2' for child node
TEXT="$(apt-rdepends $1 | sed -e 's/^/1 /' -e 's/.*: /2 /'; echo '-')"
TOTAL=$(echo "$TEXT" | grep '^1' | wc -l) # total parent

COUNT=0

echo "$TEXT" | while read line; do
        tmp=$last

        [ "${line:0:1}" != "${last:0:1}" ] && tmp=$(echo $last | sed -e 's/^2/3/')

        [ "${tmp:0:1}" == "1" ] && ((COUNT++))

        pkg=$(echo $tmp | awk '{print $2}')
        installed=$(dpkg -l | awk -v package="$pkg" '$2 ~ package {print $1}')
        result="$tmp $installed"

        if [ "$TOTAL" != "$COUNT" ]; then
                echo $result | sed -e "s/^1/$T1/" -e "s/^2/$T2/" -e "s/^3/$T3/"
        else
                echo $result | sed -e "s/^1/$T4/" -e "s/^2/$T5/" -e "s/^3/$T6/"
        fi

        last=$line
done