Track folder renames in git.

git-folder-renames

#!/bin/bash

d=$1

function first_commit_on_dir() {
    d=$1
    echo $(git log --follow --oneline --pretty=format:'%H' --reverse -- "$d" | head -1)
}

function get_renames() {
    d=$1
    first_commit=$(first_commit_on_dir "$d")
    #echo "first commit is $first_commit"
    tree=$(git ls-tree -r -d "$first_commit" -- "$d" | grep "${d}\$" | awk '{print $3}')
    #echo "tree at first commit is $tree"
    old_dir=$(git ls-tree -r -d "${first_commit}^" | grep "$tree" | awk '{print $4}')
    if [ ! -z "$old_dir" ]; then
        renames=$(get_renames "$old_dir")
        if [ ! -z "$renames" ]; then
            printf "$renames\n"
        fi
        printf "$old_dir $d $first_commit\n"
    fi
}

get_renames "$d"