A GIT hook for limiting the size of files committed to a repository.

limit-size.sh

#!/bin/sh

#echo ""
#echo "==== Remote update-hooks/file-hooks/limit-size.sh ===="


#Initialize
ref="$1"
old_rev="$2"
new_rev="$3"
tree_path="$4"
tree_file="$5"

#if the file isnt a regular file then lets just pass
if [ ! -f ${tree_path}/${tree_file} ]; then
   exit 0
fi

repo_path=$PWD
large_size=10000
max_size=50000000
#file_size=`ls -la ${tree_path}/${tree_file} | sed -e "s/^.\{10\} [0-9]* [^ ]* [^ ]* //g" | sed -e "s/ .*$//g"`
file_size="`cat "${tree_path}/${tree_file}" | gzip -c | wc -c`"

#try to get large and max file size from config
config_large_size=`git config --get hook.update.limit-size.large_size`
if [ "$config_large_size" -gt "0" 2>> /dev/null ]; then
   large_size=$config_large_size
fi
config_max_size=`git config --get hook.update.limit-size.max_size`
if [ "$config_max_size" -gt "0" 2>> /dev/null ]; then
   max_size=$config_max_size
fi





#print some information that might be useful
#echo "ref: ${ref} - old: ${old_rev} - new: ${new_rev} - tree: ${tree_path} - file: ${tree_file}"

cd $tree_path

large_attr=`git --git-dir=${repo_path} --work-tree=${tree_path} check-attr large -- ${tree_file} | sed -e "s/^[^:]*: large: //g"`

#echo "large attr: $large_attr"

is_large="false"
if [ $large_attr = "set" ]; then
   is_large="true"
elif [ $large_attr = "unset" ]; then
   is_large="false"
elif [ $large_attr = "unspecified" ]; then
   is_large="false"
elif [ "$large_attr" -gt "$large_size"  ]; then
   is_large="true"
   max_size=$large_attr
elif [ "$large_attr" -lt "$large_size" ]; then
   is_large="true"
   max_size=$large_attr
   large_size=$large_attr
fi

#we dont need to do anything at all if the file isnt large
if [ "$file_size" -lt "$large_size" ]; then
   exit 0
fi


#since we got this far its size is large enough to be large, so this needs to agree with is_large to pass
if [ $is_large = "false" ]; then
   echo "ERROR: The file located at '${tree_file}' in commit ${new_rev} which you are trying to push is too large. It has a file size of ${file_size} bytes yet this type of file has a maximum allowable size of ${large_size} bytes. Please adjust your .gitattributes file."
   exit 1
elif [ "$file_size" -gt "$max_size" ]; then
   echo "ERROR: The file located at '${tree_file}' in commit ${new_rev} which you are trying to push is too large. It has a file size of ${file_size} bytes yet this type of file has a maximum allowable size of ${max_size} bytes. Please adjust your .gitattributes file."
   exit 1
fi


#clean up
cd ${repo_path}


#echo "==== Exited Remote update-hooks/file-hooks/limit-size.sh ===="
#echo ""