init.sh

#!/bin/bash

# Stop on first error
set -e

# Remove previous results
rm -f /results/{gource.ppm,gource.mp4}

# Define defaults
RES="${RES:-1920x1080}"
DEPTH="${DEPTH:-24}"

github_user=''
github_repository=''

# Parse the Github repository string passed as argument and download the repository
prepare_github_repository () {
  repository_string=$1

  IFS='/' read -ra repository_split <<< "$repository_string"

  counter=2
  for i in "${repository_split[@]}"; do
    ((counter--))
  done

  if [ "${counter}" -eq "0" ]; then
    github_user=${repository_split[0]}
    github_repository=${repository_split[1]}
  else
    echo ERROR: Failed to parse the Github repository string
    # Terminate and indicate error
    exit 1
  fi

  # Download git repository
  git clone "/~https://github.com/$repository_string.git" .
}

render () {
    xvfb-run -a -s "-screen 0 ${RES}x${DEPTH}" \
        gource "-$RES" \
          -r 30 \
          --title "$TITLE" \
          --user-image-dir /avatars/ \
          --highlight-all-users \
          -s 0.5 \
          --seconds-per-day .4 \
          --hide dirnames,filenames \
          --font-size 25 \
          --font-colour FFFF00 \
          --user-scale 4.0 \
          --auto-skip-seconds 1 \
          -o - \
          | ffmpeg -y -r 30 -f image2pipe \
          -loglevel info \
          -vcodec ppm \
          -i - \
          -vcodec libx264 \
          -preset ultrafast \
          -pix_fmt yuv420p \
          -crf 1 \
          -threads 0 \
          -bf 0 /results/gource.mp4
}

# Check if any arguments were passed or if the passed argument is empty
if [ $# -eq 0 -o -z "$1" ]; then
  echo "No arguments supplied. Expecting a volume mounted with the repository."

  # Start the rendering process
  render
else
  # Parse the Github repository string and download the repository
  prepare_github_repository $1

  # Start the rendering process
  render

  mv /results/gource.mp4 "/results/$github_user-$github_repository.mp4"
fi