blob: c9d73dfb1ade1aeebb68f37650bfe9f26aeee8ef (
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#!/usr/bin/env bash
# Usage: git filter-branch -f --parent-filter ~/git-filters/parent-prune-empty-first HEAD
has_empty_tree() {
[[ "$(git rev-parse "${1}^{tree}")" == 4b825dc642cb6eb9a060e54bf8d69288fbee4904 ]]
}
has_parents() {
git rev-parse "${1}^" &>/dev/null
}
for parent in $(cat); do
if [[ "$parent" == '-p' ]]; then
continue
fi
if has_empty_tree "$parent" && ! has_parents "$parent"; then
continue
fi
printf ' -p %s ' "$parent"
done
echo
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