update_snapshots.py

# Copyright (c) Jupyter Development Team.
# Distributed under the terms of the Modified BSD License.

import hashlib
from pathlib import Path
import json
import shutil

import argparse
parser = argparse.ArgumentParser(description='Update Galata Snapshot images.')
parser.add_argument('report', help='Path to the galata-report directory')
args = parser.parse_args()

# Calculate hashes of all png files in the test/directory
def sha1(path):
    with open(path, "rb") as f:
        return hashlib.sha1(f.read()).hexdigest()


filehashes = {sha1(p): p for p in Path('.').glob('**/*-snapshots/*-linux.png')}


# For every json file in data directory except report.json
data_dir = Path(args.report).expanduser().resolve() / 'data'
for p in data_dir.glob('*.json'):
    if p.name == 'report.json':
        continue
    with open(p, "rb") as f:
        z = json.load(f)
    for t in z['tests']:
        if t['outcome'] != 'unexpected':
            continue
        for r in t['results']:
            for attachment in r['attachments']:
                if attachment['name'] == 'expected':
                    expected = Path(attachment['path']).stem
                elif attachment['name'] == 'actual':
                    actual = data_dir / Path(attachment['path']).name
            if expected and attachment and expected in filehashes:
                shutil.copyfile(actual, filehashes[expected])
                print(f'{actual} -> {filehashes[expected]}')