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#!/bin/bash

cat <<'EOT'
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ This command rewrites GIT history like git-rebase. Beware never to rewrite @
@ trees which are already published, as that would deeply upset all cloning @
@ repos. For more details see 'git help rebase'. Tread carefully! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
EOT
read -p "I know what I am doing: " answer
test "$answer" = yes || exit 1

set -o errexit
 
# Author: David Underhill
# Script to permanently delete files/folders from your git repository. To use
# it, cd to your repository's root and then run the script with a list of paths
# you want to delete, e.g., git-delete-history path1 path2
 
if [ $# -eq 0 ]; then
    exit 0
fi
 
# make sure we're at the root of git repo
if [ ! -d .git ]; then
    echo "Error: must run this script from the root of a git repository"
    exit 1
fi
 
# remove all paths passed as arguments from the history of the repo
files=$@
git filter-branch --index-filter "git rm -rf --cached --ignore-unmatch $files" HEAD
 
# remove the temporary history git-filter-branch otherwise leaves behind for a long time
rm -rf .git/refs/original/ && git reflog expire --all && git gc --aggressive --prune
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