#!/bin/sh
# Wrapper around 'ack' to crawl all directories from $PWD to / (or $HOME)
# looking for a "local" .ackrc file. Useful for setting project-level
# --ignore-dir settings.

PWD=$(pwd)
HOME=~
ack=$(type -P ack)
ackrc=""

match=""
dir="$PWD"
while [ "$dir" != "/" -a "$match" = "" ]; do
    if [ -e "$dir/.ackrc" ]; then
        if [ "$dir" != "$HOME" ]; then
            match=1
            echo "(Include: ${dir}/.ackrc)"
            ackrc=$(egrep "^[^#]" "${dir}/.ackrc" | tr '\n' ' ')
        else
            match=0
        fi
    else
        dir=$(dirname "$dir")
    fi
done

# Add quote-wrapping for any additional args to ensure proper passing to
# real 'ack'.
for arg in "$@"; do ackrc="${ackrc} '${arg}'"; done

# Run the final command
eval "${ack} ${ackrc}"