#!/bin/bash

set -e

GIT_OPTS=""
OUTPUT_FILTER="cat" # no-op

commit_id_format=$(tput setaf 1)
date_format=$(tput bold; tput setaf 4)
author_format=$(tput setaf 2)
ref_name_format=$(tput setaf 3)
bold=$(tput bold)
reset=$(tput sgr0)

function usage() {
    echo ""
    echo "git activity"
    echo ""
    echo "  See 'man git-activity' for further information"
}

# actually parse the options and do stuff
while [[ $1 = -?* ]]; do
    case $1 in
        -h|--help)
            usage
            exit 0
            ;;
        --fetch)
            echo "Fetch updates"
            git fetch -q
            ;;
        -c|--count)
            shift
            limit=${1-"10"}
            #OUTPUT_FILTER="tail -n ${limit}"
            GIT_OPTS="--count=${limit}"
            ;;
        --no-color|--no-colour)
            commit_id_format=""
            date_format=""
            author_format=""
            ref_name_format=""
            bold=""
            reset=""
            ;;
        *) ;;
    esac

shift
done

# Use newline as a field separator
IFS=$(echo -en "\n\b")

# Use tac if available, otherwise tail with the possibly-not-always-available
# -r flag (for reverse output)
TAC=$(which tac || echo 'tail -r')

for line in $(git for-each-ref ${GIT_OPTS} refs/remotes --format="%(authordate:relative)|%(objectname:short)|%(authorname)|%(refname:short)|%(subject)" --sort="-authordate"); do
    fields=(`echo $line | tr "|" "\n"`)
    printf "${date_format}%15s${reset} ${commit_id_format}%s${reset} - ${author_format}[%s]${reset} (${ref_name_format}%s${reset}): %s\n" ${fields[*]}
done | eval $TAC # reverse sort the output to show the newest entry last