#!/usr/bin/env bash
# Generates gource video (h.264) out of multiple repositories.
# Pass the repositories in command line arguments.
# Example:
# <this.sh> /path/to/repo1 /path/to/repo2

i=0
for repo in $*; do
	# 1. Generate a Gource custom log files for each repo. This can be facilitated by the --output-custom-log FILE option of Gource as of 0.29:
	logfile="$(mktemp /tmp/gource.XXXXXX)"
	gource --output-custom-log "${logfile}" ${repo}
	# 2. If you want each repo to appear on a separate branch instead of merged onto each other (which might also look interesting), you can use a 'sed' regular expression to add an extra parent directory to the path of the files in each project:
	gsed -i -E "s#(.+)\|#\1|/${repo}#" ${logfile}
	logs[$i]=$logfile
	let i=$i+1
done

combined_log="$(mktemp /tmp/gource.XXXXXX)"
cat ${logs[@]} | sort -n > $combined_log
rm ${logs[@]}

echo "Committers:"
cat $combined_log | awk -F\| {'print  $2'} | sort | uniq
echo "======================"

outfile="gource.mp4"
time gource $combined_log \
	-s 0.4 \
	-i 0 \
	--highlight-users \
	--highlight-dirs \
	--file-extensions \
	--hide mouse \
	--key \
	--stop-at-end \
	--output-ppm-stream - | ffmpeg -y -b 3000K -r 60 -f image2pipe -vcodec ppm -i - -vcodec libx264 -vpre default $outfile
rm $combined_log