Bash script to create a cross-repo gource vizualization

multigource.sh

# Creates a Gource visualization from multiple repositories.
# This script requires gource and ffmpeg
# sudo apt-get install gource
# sudo apt-get install ffmpeg

# Usage: ./script <user> [repository name]...
# e.g ./multigource.sh elationfoundation commotion-client luci-commotion

function get_repos()
{
	local arg=("$@")
	
	USER="${arg[1]}"
	echo "$arg"
	echo "$1"
	echo "${arg[2]}"
	for ((i=2;i<$1+1;i++)) ;do
		echo "${arg[i]}"
		git clone https://github.com/$USER/"${arg[i]}".git
	done
	
}

#Get all repositories from the specified user.
get_repos $# "$@" 

#Create a custom log file from each repository
for file in *
do
	gource --output-custom-log $file.txt $file
done

#Create an archive file to hold the combined repositories
touch archive

#Add in an extra "level" (fake folder) to each repository that uses their repo name
#This places the repo name in a node that sits between the center node and the repo's core directory
for file in *.txt
do
	name=$(echo "$file" |cut -d \. -f 1)
	echo $name
	sed -i -r "s#(.+)\|#\1|/$name#" $file
	cat $file >> archive 
done

#Sort all archive files into chronilogical order so the viz shows development correctly in time.
cat archive | sort -n > all.txt

#Create a custom Gource viz
#This is a very simple viz. Go to https://code.google.com/p/gource/wiki/Controls to customize.
gource --auto-skip-seconds .01 --seconds-per-day .004 --file-idle-time 0 --date-format "%B %Y" --font-size 24 --key --title $USER -1280x720 -o gource.ppm all.txt

#Here is an example we use for the Commotion project
#gource --auto-skip-seconds .01 --seconds-per-day .004 --file-idle-time 0 --date-format "%B %Y" --font-size 24 --hide bloom,filenames,dirnames --key --title "The Commotion Project" --logo CommotionLogoSmall-black.png -1280x720 -o gource.ppm all.txt 

#actually create mp4
ffmpeg -y -r 60 -f image2pipe -vcodec ppm -i gource.ppm -vcodec libx264 -preset ultrafast -pix_fmt yuv420p -crf 1 -threads 0 -bf 0 gource.mp4