Anonymise Script for London Applicants

anonymise.sh

#!/bin/sh

# $1 - new identifier to use
# $2 - repo to clone

IDENTIFIER=$1
SOURCE_REPO=$2
DEST_DIR=`pwd`

# Step 1 - Make temporary directory
SOURCE_GIT_DIR=`mktemp -d`
echo $SOURCE_GIT_DIR

cd $SOURCE_GIT_DIR

git clone --bare $SOURCE_REPO $SOURCE_GIT_DIR

BRANCHES=`git branch --list | awk '{print $2}'`

# Step 2 - rename branches
for branch in $BRANCHES; do
  NEW_BRANCH=$IDENTIFIER-$branch
  git branch -m $branch $NEW_BRANCH
done

# Step 3 - change commit info
for branch in $BRANCHES; do
  # -f so multiple operations can be performed at once
  git filter-branch -f --env-filter '
    export GIT_AUTHOR_NAME="Anonymous"
    export GIT_AUTHOR_EMAIL="anon@example.com"
    export GIT_COMMITTER_NAME="Captain Commit"
    export GIT_COMMITTER_EMAIL="anon@commit.com"' $NEW_BRANCH
done

# Step 4 - Remove originals
git for-each-ref --format="%(refname)" refs/original/ | xargs -n 1 git update-ref -d

# Step 5 - Create remote in the original repo
# TODO: use --no-tags because this script won't have done any work on tags?
cd $DEST_DIR
git remote add -f --no-tags $IDENTIFIER $SOURCE_GIT_DIR

# Step 6 - checkout branch
for branch in $BRANCHES; do
  git checkout $IDENTIFIER-$branch
done

# Step 7 - Delete temporary directory
rm -rf $TEMP

# Step 8 - Delete remote branch
git remote rm $IDENTIFIER

# Step 9 - Push to origin
git push

# Step 10 - Delete local branch
git checkout master
git branch -D $IDENTIFIER-$branch