Script to show file size changes in git history

git-file-size-diff

@@ -0,0 +1,22 @@
+#!/bin/sh
+. git sh-setup
+args=$(git rev-parse --sq "$@")
+eval "git diff-tree -r $args" | {
+  total=0
+  while read A B C D M P
+  do
+    case $M in
+      M) bytes=$(( $(git cat-file -s $D) - $(git cat-file -s $C) )) ;;
+      A) bytes=$(git cat-file -s $D) ;;
+      D) bytes=-$(git cat-file -s $C) ;;
+      *)
+        echo >&2 warning: unhandled mode $M in \"$A $B $C $D $M $P\"
+        continue
+        ;;
+    esac
+    total=$(( $total + $bytes ))
+    printf '%d\t%s\n' $bytes "$P"
+  done
+  echo total $total Bytes
+  echo total $(($total/1000)) KBytes
+}