m2_cleanup

#!/bin/sh
M2DIR=~/.m2
MAXAGE="864000" # 10 days in sec
NOW="`date +%s`"
MAXOLD="$(($NOW - $MAXAGE))" # files older than this will be removed. See further
# get list or artifact ID's prependede with group
find $M2DIR -iname "*.pom" \
    | xargs dirname | xargs dirname \ # dirname twice gives a directory 1 level up the version
    | sort | uniq \
    | while read ARTIFACT; do
        # get number of available versions
        VERSIONS_NUM="`ls -1 ${ARTIFACT} | wc -l`"
        # skip this artifact if only one version is present
        test "$VERSIONS_NUM" -le 1 && continue
        # if several versions found, remove all older than $MAXAGE from NOW leaving latest in place
        for VERSION in `ls -t -1 ${ARTIFACT} | tail -n +2`; do
            TARGET="$ARTIFACT/$VERSION"
            MTIME="`stat --printf %Y $TARGET`"
            test "$MTIME" -le "$MAXOLD" && echo "Removing $TARGET"
        done
    done