Script to clean up large object from git repository

git-clean-large-object.sh

# Reference: http://stevelorek.com/how-to-shrink-a-git-repository.html

function discoveryLargeGitObject() {

    IFS=$'\n';

    # list all objects including their size, sort by size, take top 10
    objects=`git verify-pack -v .git/objects/pack/pack-*.idx | grep -v chain | sort -k3nr | head`

    echo "All sizes are in kB. The pack column is the size of the object, compressed, inside the pack file."

    output="size,pack,SHA,location"
    for y in $objects
    do
        # extract the size in bytes
        size=$((`echo $y | cut -f 5 -d ' '`/1024))
        # extract the compressed size in bytes
        compressedSize=$((`echo $y | cut -f 6 -d ' '`/1024))
        # extract the SHA
        sha=`echo $y | cut -f 1 -d ' '`
        # find the objects location in the repository tree
        other=`git rev-list --all --objects | grep $sha`
        #lineBreak=`echo -e "\n"`
        output="${output}\n${size},${compressedSize},${other}"
    done

    echo -e $output | column -t -s ', '

}

function cleanSpecificGitFile() {
    local filename=$1
    git filter-branch --tag-name-filter cat --index-filter "git rm -r --cached --ignore-unmatch $filename" --prune-empty -f -- --all
}

function reclaimGitSpace() {
    rm -rf .git/refs/original/
    git reflog expire --expire=now --all
    git gc --prune=now
    git gc --aggressive --prune=now
}

function help() {
    echo -e "Usages: $0 CMD\nCMD:"
    grep "^function" $0 | sed 's/function/  /g' | sed 's/[{()]//g'
}

if [ "_$1" = "_" ]; then
    help
else
    "$@"
fi