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|
#!/usr/bin/env python3
import os
import sys
import argparse
import hashlib
import re
whoami = os.path.basename(sys.argv[0])
BANNER = f'''//
// This file is automatically generated by {whoami}.
// Edits will be automatically overwritten if the build is
// run in maintainer mode.
//'''
def warn(*args, **kwargs):
print(*args, file=sys.stderr, **kwargs)
class Main:
SOURCES = [whoami, 'job.yml']
SUMS = 'job.sums'
def main(self, args=sys.argv[1:], prog=whoami):
options = self.parse_args(args, prog)
self.top(options)
def parse_args(self, args, prog):
parser = argparse.ArgumentParser(
prog=prog,
description='Generate files for QPDFJob',
)
mxg = parser.add_mutually_exclusive_group(required=True)
mxg.add_argument('--check',
help='update checksums if files are not up to date',
action='store_true', default=False)
mxg.add_argument('--generate',
help='generate files from sources',
action='store_true', default=False)
return parser.parse_args(args)
def top(self, options):
if options.check:
self.check()
elif options.generate:
self.generate()
else:
exit(f'{whoami} unknown mode')
def get_hashes(self):
hashes = {}
for i in sorted(self.SOURCES):
m = hashlib.sha256()
with open(i, 'rb') as f:
m.update(f.read())
hashes[i] = m.hexdigest()
return hashes
def check(self):
hashes = self.get_hashes()
match = False
try:
old_hashes = {}
with open(self.SUMS, 'r') as f:
for line in f.readlines():
m = re.match(r'^(\S+) (\S+)\s*$', line)
if m:
old_hashes[m.group(1)] = m.group(2)
match = old_hashes == hashes
except Exception:
pass
if not match:
exit(f'{whoami}: auto job inputs have changed')
def update_hashes(self):
hashes = self.get_hashes()
with open(self.SUMS, 'w') as f:
print(f'# Generated by {whoami}', file=f)
for k, v in hashes.items():
print(f'{k} {v}', file=f)
def generate(self):
warn(f'{whoami}: regenerating auto job files')
with open('libqpdf/qpdf/auto_job_decl.hh', 'w') as f:
print(BANNER, file=f)
# Update hashes last to ensure that this will be rerun in the
# event of a failure.
self.update_hashes()
if __name__ == '__main__':
try:
os.chdir(os.path.dirname(os.path.realpath(__file__)))
Main().main()
except KeyboardInterrupt:
exit(130)
|
