image-optimization-automation.sh

# step 1. find all uncommitted/changed images in sources dir and copy them to the buffer dir 
for file in $(git status -s | cut -c4- | grep .png)
do
  echo $file;
  mkdir -p "./to_optimize/$(dirname $file)";
  cp $file "./to_optimize/$file";
done

# step 2. optimize files in buffer dir by some third party service 

# step 3. copy files from buffer dir back to the sources dir 
for file in $(find "./to_optimize" -name "*.png")
do
  cp $file ${file#"./to_optimize/"};
done