imagesnap git post-commit photo rewrite

Remember the tip for git that takes an image of each commit via git's built-in hooks? (The one that takes a photo of you when you make a commit.) Here's a somewhat cleaner rewrite of post-commit—just because it's a shell script doesn't mean it has to be ugly.

To keep things tidy, it creates a folder called commit_images directly in your repo and gitignores it for you. It then adds the commit photos to that folder.

imagesnap can be installed under OS X via homebrew.

Here's the gist

#!/bin/bash

function make_image_dir () {
  TARGET_DIR=$1
  if [ ! -d "${TARGET_DIR}" ]; then
    mkdir "${TARGET_DIR}"
  fi
}

function ignore_image_dir () {
  TARGET_DIR=$1
  GIT_IGNORE=$2
  grep -q "${TARGET_DIR}" "${GIT_IGNORE}"
  if [ $? -gt 0 ]; then
    echo "${TARGET_DIR}" >> "${GIT_IGNORE}"
  fi
}

function take_photo () {
  TARGET_DIR=$1
  DATE_STRING=`date '+%Y_%m_%d-%H_%M_%S'`
  imagesnap -q "${TARGET_DIR}/${USER}-${DATE_STRING}.jpg"
}

BASE_DIR=$GIT_DIR/..
IMAGE_DIR=commit_images

make_image_dir "$BASE_DIR/$IMAGE_DIR"
ignore_image_dir "$IMAGE_DIR" "$BASE_DIR/.gitignore"
take_photo "$BASE_DIR/$IMAGE_DIR"