git#pre-commit : This command prevent commit if total file size exceeds error is occured.

maxfilesize-pre-commit.md

$ cat .git/hooks/pre-commit

#!/bin/bash
#
# This command prevent commit if total file size exceeds error is occured.
#

if [ -z "$filesizelimit" ]; then
  #### TODO: custom change
  #filesizelimit=1000 # 1M
  filesizelimit=400 # 400K
fi

total=0
for fname in `git diff-index --cached HEAD --name-only`; do
  if [ -f $fname ]; then
    size=`ls -Al $fname | awk '{ print $5 }'`
    total=`expr $total + $size`
  fi  
done

filesize=`expr $total / 1024`


if [ $filesize -gt $filesizelimit ]; then

  filename=`git diff-index -z --cached HEAD --name-only`

  echo "# =================" >&2
  echo "Error: Too large commit attempted." >&2
  echo  >&2
  echo "File's size limit is $filesizelimit KB" >&2
  echo "File's named $filename of size $filesize KB." >&2
  exit 1
fi

exit 0

test

$ git commit -a 
# =================
Error: Too large commit attempted.

File's size limit is 400 KB
File's named 1.png2.png of size 443 KB.