aider/redact.py

95 lines
4 KiB
Python
Executable file

#!/usr/bin/env python3
import re
import sys
import os
import json
def process_file(input_path, output_path):
"""
Process an asciinema cast v2 file to filter out certain sections based on ANSI cursor commands.
Format: First line is a JSON header. Subsequent lines are JSON arrays: [timestamp, "o", "text"]
If a text field contains "\u001b[ROW;COL]H" followed by "Atuin", skip it and all subsequent
records until finding a text with "\u001b[ROW;(COL-1)H".
Maintains consistent timestamps by not advancing time during skip sections.
"""
skip_mode = False
target_pattern = None
ansi_pattern = re.compile(r'\u001b\[(\d+);(\d+)H')
is_first_line = True
last_timestamp = 0.0
time_offset = 0.0 # Accumulator for time to subtract
with open(input_path, 'r', encoding='utf-8') as infile, open(output_path, 'w', encoding='utf-8') as outfile:
for line in infile:
# Always include the header (first line)
if is_first_line:
outfile.write(line)
is_first_line = False
continue
# Parse the JSON record
try:
record = json.loads(line)
if not isinstance(record, list) or len(record) != 3 or record[1] != "o":
# If not a valid record, just write it out
outfile.write(line)
continue
current_timestamp = float(record[0])
text = record[2] # The text content
# If we're not in skip mode, check if we need to enter it
if not skip_mode:
if '\u001b[' in text and 'Atuin' in text:
match = ansi_pattern.search(text)
if match:
row = match.group(1)
col = int(match.group(2))
# Create pattern for the ending sequence
target_pattern = f'\u001b[{row};{col-1}H'
skip_mode = True
# Start tracking time to subtract
skip_start_time = current_timestamp
continue # Skip this record
# If we're not skipping, write the record with adjusted timestamp
adjusted_timestamp = max(current_timestamp - time_offset, last_timestamp)
last_timestamp = adjusted_timestamp
record[0] = adjusted_timestamp
outfile.write(json.dumps(record) + '\n')
# If we're in skip mode, check if we should exit it
else:
if target_pattern in text:
skip_mode = False
# Calculate how much time to subtract from future timestamps
time_offset += (current_timestamp - skip_start_time)
# Write this record with adjusted timestamp
adjusted_timestamp = max(current_timestamp - time_offset, last_timestamp)
last_timestamp = adjusted_timestamp
record[0] = adjusted_timestamp
outfile.write(json.dumps(record) + '\n')
# Otherwise we're still in skip mode, don't write anything
except json.JSONDecodeError:
# If we can't parse the line as JSON, include it anyway
outfile.write(line)
if __name__ == "__main__":
if len(sys.argv) != 3:
print(f"Usage: {os.path.basename(sys.argv[0])} input_file output_file")
sys.exit(1)
input_file = sys.argv[1]
output_file = sys.argv[2]
if not os.path.exists(input_file):
print(f"Error: Input file '{input_file}' does not exist")
sys.exit(1)
process_file(input_file, output_file)
print(f"Processed {input_file} -> {output_file}")