post-diffall-auto-compare.py (original) (raw)

"""

Post-diffall file comparisons: a simple example of scraping filenames from diffall.py's report, and a useful utility in general [3.3].

Automatically compare the files in all DIFFER lines in a diffall.py final report, by running system commands to show detailed differences. This is an alternative to manual copy/paste of the filenames in the diffall report's '[...] - [...]' lines.

Run this in the same folder where diffall ran, unless all paths absolute. Pass one arg: the name of a file where diffall.py's output has been saved. This runs 'diff' commands on Unix and 'fc' commands on Windows for each DIFFER line; the output is these commands' output, separated by '=' lines.

See ../../UserGuide.html for license and attribution.

"""

import sys, re, os

file = sys.argv[1] # 1 arg = file with diffall's report section

differ = 'diff' if not sys.platform.startswith('win') else 'fc'

ndiffs = 0 for line in open(file, 'r'): match = re.match('^.DIFFER.[(.)] - [(.)].*$', line) if match: ndiffs += 1 left, right = match.group(1), match.group(2) print('\n\n', '='*80, sep='') print('[%s] - [%s]' % (left, right)) os.system('%s %s %s' % (differ, left, right))

print('\nNumber diffs:', ndiffs)