from pathlib import Path
import re

p = Path('cmdlets/_shared.py')
src = p.read_text(encoding='utf-8')
lines = src.splitlines(True)
changed = False
new_lines = []
for line in lines:
    m = re.match(r'^(?P<ws>[ \t]*)', line)
    ws = m.group('ws') if m else ''
    if '\t' in ws:
        new_ws = ws.replace('\t', '    ')
        new_line = new_ws + line[len(ws):]
        new_lines.append(new_line)
        changed = True
    else:
        new_lines.append(line)

if changed:
    p.write_text(''.join(new_lines), encoding='utf-8')
    print('Normalized leading tabs to spaces in', p)
else:
    print('No leading tabs found; no changes made')