Insane compression for consecutive snapshots of things...

bspack.sh

#!/bin/bash
DIR=$1
DIR=${DIR%/}
if [ -d "$DIR" ]; then
  pushd "$DIR" > /dev/null 2>&1
  ls *.yml | sort -n > infiles.txt
  cat infiles.txt | while read FNAME; do
    BASIS=$(grep -E -B 1 "^$FNAME\$" infiles.txt | grep -v $FNAME)
    if [ "$BASIS" != "" ]; then
      echo "Creating diff between $BASIS and $FNAME..."
      bsdiff $BASIS $FNAME ${BASIS%.yml}_${FNAME%.yml}.bspatch
    else
      export STARTING_POINT=$FNAME
    fi
  done
  INITIAL_FILE=$(head -1 infiles.txt)
  rm infiles.txt
  popd > /dev/null 2>&1
  if [ $(($(ls "$DIR"/*.bspatch 2>/dev/null | wc -l) + 0)) -gt 0 ]; then
    tar cjf "${DIR}.tar.bz2" "$DIR/$INITIAL_FILE" "$DIR"/*.bspatch && rm -f "$DIR"/*.bspatch
  else
    tar cjf "${DIR}.tar.bz2" "$DIR/$INITIAL_FILE"
  fi
else
  echo "Must specify a directory."
  exit 1
fi

bsunpack.sh

#!/bin/bash
PACKAGE="$1"

if [ ! -e "$PACKAGE" ]; then
  echo "Must specify a package."
  exit 1
fi

tar xjf "$PACKAGE"
(
  cd "${PACKAGE%.tar.bz2}"
  while [ 1 ]; do

    BASIS=$(ls *.yml | sort -n | tail -1 2>/dev/null)
    if [ ! -e "$BASIS" ]; then
      echo "Couldn't find a YML file to work from."
      exit 1
    fi
    DIFF=$(ls ${BASIS%.yml}_*.bspatch 2> /dev/null)
    SUFFIX=${DIFF#${BASIS%.yml}_}
    TARGET=${SUFFIX%.bspatch}.yml

    if [ -e "$DIFF" ]; then
      echo "Rebuilding $TARGET via $BASIS and $DIFF..."
      bspatch $BASIS $TARGET $DIFF && rm $DIFF
    else
      echo "Looks like we're done here."
      exit 0
    fi
  done
)