Update tags file based on paths in tags file

uptag.py

#!/usr/bin/env python
"""Scans file to find folders on which ctags was originally run."""
import subprocess
from pathlib import Path

dirs = set()
for line in Path("tags").open():
    if line.startswith("!"):
        continue
    # extract 'tests' from
    # turn_error_on tests/data/query_engine.py ...
    dirs.add(line.split()[1].split("/")[0])

subprocess.run(["wc", "-l", "tags"])
cmd = ["ctags", "-R"] + list(dirs)
print(cmd)
subprocess.run(cmd)
subprocess.run(["wc", "-l", "tags"])