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#!/usr/bin/env python3
"""
Wrapper for LanguageTool to produce flycheck-compatible output.
Output format: filename:line:column: message
"""
import json
import sys
import subprocess
def main():
if len(sys.argv) < 2:
print("Usage: languagetool-flycheck FILE", file=sys.stderr)
sys.exit(1)
filename = sys.argv[1]
# Run languagetool with JSON output
try:
result = subprocess.run(
['languagetool', '-l', 'en-US', '--json', filename],
capture_output=True,
text=True,
timeout=30
)
except subprocess.TimeoutExpired:
print(f"{filename}:1:1: LanguageTool timeout", file=sys.stderr)
sys.exit(1)
except Exception as e:
print(f"{filename}:1:1: LanguageTool error: {e}", file=sys.stderr)
sys.exit(1)
# Parse JSON output
try:
# Find the JSON in the output (skip warning lines)
json_output = None
for line in result.stdout.split('\n'):
if line.startswith('{'):
json_output = line
break
if not json_output:
sys.exit(0) # No errors found
data = json.loads(json_output)
# Read file to calculate line numbers from character offsets
with open(filename, 'r', encoding='utf-8') as f:
content = f.read()
# Convert matches to flycheck format
for match in data.get('matches', []):
offset = match['offset']
length = match['length']
message = match['message']
rule_id = match['rule']['id']
# Calculate line and column from offset
line = content[:offset].count('\n') + 1
line_start = content.rfind('\n', 0, offset) + 1
column = offset - line_start + 1
# Get first suggestion if available
suggestions = match.get('replacements', [])
if suggestions:
suggestion = suggestions[0]['value']
message = f"{rule_id}: {message} Suggestion: {suggestion}"
else:
message = f"{rule_id}: {message}"
# Output in flycheck format
print(f"{filename}:{line}:{column}: {message}")
except json.JSONDecodeError as e:
print(f"{filename}:1:1: Failed to parse LanguageTool JSON: {e}", file=sys.stderr)
sys.exit(1)
except Exception as e:
print(f"{filename}:1:1: Error processing LanguageTool output: {e}", file=sys.stderr)
sys.exit(1)
if __name__ == '__main__':
main()
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