git filter-branch --index-filter 'git ls-tree --name-only --full-tree $GIT_COMMIT | grep -v "^libpostproc$" | xargs git rm --cached -r || true' --prune-empty -- --all > ../p.log
git filter-branch --commit-filter 'if [ z$1 = z`git rev-parse $3^{tree}` ]; then skip_commit "$@"; else git commit-tree "$@"; fi' "$@" -f