#! /bin/sh

# Global variables
realfile="/home/tuxillo/public_html/archive/misc/commitsgraph.txt"
outfile=$(mktemp)
insfile=$(mktemp)
delfile=$(mktemp)
timestamp=$(date)
prevb="master"
distribution="/build/home/tuxillo/s/distribution/distribution"
srcdir="/build/home/tuxillo/s/dragonfly"

log()
{
    local args=$*

    echo ${args} >> ${outfile}
}

header()
{
    local from=$1
    local to=$2
    local heading=""

    if [ -z ${to} ]; then
	heading="origin/${from}"
    else
	heading="origin/${from} --> origin/${to}"
    fi

    log ${heading}
    log "----------------------------------------------------------------------------------------------"
}

# Make sure you pass refs quoted
histogram_ref()
{
    local ref=$1

    cd ${srcdir}
    git shortlog -s ${ref} | \
	sort -rn -k1,1 | \
	${distribution} --height=150 --char=# --graph=vk >> ${outfile} 2>/dev/null

}

# ------------------ MAIN

# Make sure no previous files exist
rm -f ${outfile} ${insfile} ${delfile}

log ${timestamp}
log " "

# Make sure we have latest changes
( cd ${srcdir} && git fetch ) || exit 255

header ${prevb}
histogram_ref "origin/${prevb}"

for b in `git branch -a | grep "origin/.*DragonFly_RELEASE_" | cut -d "/" -f3 | sort -Vr`
do
    time1=$(git log -n 1 origin/${b} | grep Date | cut -c 9-100)
    log " "
    log ${time1}
    header ${b} ${prevb}
    histogram_ref "origin/${b}..origin/${prevb}"

    if [ "${prevb}" != "master" ]; then
	tmp=$(git diff --stat origin/${b}..origin/${prevb} | tail -1)
	ins=$(echo ${tmp} | cut -d "," -f 2 | cut -w -f2)
	printf "%s\t%s\n" ${prevb} ${ins} >> ${insfile}
	del=$(echo ${tmp} | cut -d "," -f 3 | cut -w -f2)
	printf "%s\t%s\n" ${prevb} ${del} >> ${delfile}
    fi
    prevb=${b}
done

log " "
log "INSERTIONS per branch"
log "----------------------------------------------------------------------------------------------"
sort -rn -k2,2 ${insfile} | \
    ${distribution} --size=full --char=# --graph=kv >> ${outfile} 2> /dev/null

log " "
log "DELETIONS per branch"
log "----------------------------------------------------------------------------------------------"
sort -rn -k2,2 ${delfile} | \
    ${distribution} --size=full --char=# --graph=kv >> ${outfile} 2> /dev/null

# Cleanup
cp -f ${outfile} ${realfile}
rm -f ${outfile} ${insfile} ${delfile}