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#!/bin/bash
#
# Rewrite identities in commits.
#
# Parameters
BASENAME="`basename $0`"
OLD_EMAIL="$1"
NEW_EMAIL="$2"
# Syntax check
if [ -z "$3" ]; then
echo "usage: $BASENAME <old-email> <new-email> <new-name>"
exit 1
fi
# Get new name
shift 2
NEW_NAME="$*"
# Apply filter
echo "Please run this command:"
echo ""
cat <<-EOF
git filter-branch --commit-filter '
if [ "\$GIT_AUTHOR_EMAIL" = "$OLD_EMAIL" ];
then
GIT_AUTHOR_NAME="$NEW_NAME";
GIT_AUTHOR_EMAIL="$NEW_EMAIL";
git commit-tree "\$@";
else
git commit-tree "\$@";
fi' HEAD
EOF
# See https://stackoverflow.com/questions/7654822
echo "Done! Check results and remove the backup once you're ready:"
echo "git update-ref -d refs/original/refs/heads/master"
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