Commit c216854607c2ed2ab0df90f2e2ea5c44dfcb85ad
1 parent
ad096b46
Add basic framework for QPDFJob code generation
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4 changed files
with
112 additions
and
0 deletions
generate_auto_job
0 → 100755
| 1 | +#!/usr/bin/env python3 | |
| 2 | +import os | |
| 3 | +import sys | |
| 4 | +import argparse | |
| 5 | +import hashlib | |
| 6 | +import re | |
| 7 | + | |
| 8 | +whoami = os.path.basename(sys.argv[0]) | |
| 9 | +BANNER = f'''// | |
| 10 | +// This file is automatically generated by {whoami}. | |
| 11 | +// Edits will be automatically overwritten if the build is | |
| 12 | +// run in maintainer mode. | |
| 13 | +//''' | |
| 14 | + | |
| 15 | + | |
| 16 | +def warn(*args, **kwargs): | |
| 17 | + print(*args, file=sys.stderr, **kwargs) | |
| 18 | + | |
| 19 | + | |
| 20 | +class Main: | |
| 21 | + SOURCES = [whoami, 'job.yml'] | |
| 22 | + SUMS = 'job.sums' | |
| 23 | + | |
| 24 | + def main(self, args=sys.argv[1:], prog=whoami): | |
| 25 | + options = self.parse_args(args, prog) | |
| 26 | + self.top(options) | |
| 27 | + | |
| 28 | + def parse_args(self, args, prog): | |
| 29 | + parser = argparse.ArgumentParser( | |
| 30 | + prog=prog, | |
| 31 | + description='Generate files for QPDFJob', | |
| 32 | + ) | |
| 33 | + mxg = parser.add_mutually_exclusive_group(required=True) | |
| 34 | + mxg.add_argument('--check', | |
| 35 | + help='update checksums if files are not up to date', | |
| 36 | + action='store_true', default=False) | |
| 37 | + mxg.add_argument('--generate', | |
| 38 | + help='generate files from sources', | |
| 39 | + action='store_true', default=False) | |
| 40 | + return parser.parse_args(args) | |
| 41 | + | |
| 42 | + def top(self, options): | |
| 43 | + if options.check: | |
| 44 | + self.check() | |
| 45 | + elif options.generate: | |
| 46 | + self.generate() | |
| 47 | + else: | |
| 48 | + exit(f'{whoami} unknown mode') | |
| 49 | + | |
| 50 | + def get_hashes(self): | |
| 51 | + hashes = {} | |
| 52 | + for i in sorted(self.SOURCES): | |
| 53 | + m = hashlib.sha256() | |
| 54 | + with open(i, 'rb') as f: | |
| 55 | + m.update(f.read()) | |
| 56 | + hashes[i] = m.hexdigest() | |
| 57 | + return hashes | |
| 58 | + | |
| 59 | + def check(self): | |
| 60 | + hashes = self.get_hashes() | |
| 61 | + match = False | |
| 62 | + try: | |
| 63 | + old_hashes = {} | |
| 64 | + with open(self.SUMS, 'r') as f: | |
| 65 | + for line in f.readlines(): | |
| 66 | + m = re.match(r'^(\S+) (\S+)\s*$', line) | |
| 67 | + if m: | |
| 68 | + old_hashes[m.group(1)] = m.group(2) | |
| 69 | + match = old_hashes == hashes | |
| 70 | + except Exception: | |
| 71 | + pass | |
| 72 | + if not match: | |
| 73 | + exit(f'{whoami}: auto job inputs have changed') | |
| 74 | + | |
| 75 | + def update_hashes(self): | |
| 76 | + hashes = self.get_hashes() | |
| 77 | + with open(self.SUMS, 'w') as f: | |
| 78 | + print(f'# Generated by {whoami}', file=f) | |
| 79 | + for k, v in hashes.items(): | |
| 80 | + print(f'{k} {v}', file=f) | |
| 81 | + | |
| 82 | + def generate(self): | |
| 83 | + warn(f'{whoami}: regenerating auto job files') | |
| 84 | + | |
| 85 | + with open('libqpdf/qpdf/auto_job_decl.hh', 'w') as f: | |
| 86 | + print(BANNER, file=f) | |
| 87 | + | |
| 88 | + # Update hashes last to ensure that this will be rerun in the | |
| 89 | + # event of a failure. | |
| 90 | + self.update_hashes() | |
| 91 | + | |
| 92 | + | |
| 93 | +if __name__ == '__main__': | |
| 94 | + try: | |
| 95 | + os.chdir(os.path.dirname(os.path.realpath(__file__))) | |
| 96 | + Main().main() | |
| 97 | + except KeyboardInterrupt: | |
| 98 | + exit(130) | ... | ... |
job.sums
0 → 100644
libqpdf/build.mk
| 1 | 1 | TARGETS_libqpdf = libqpdf/$(OUTPUT_DIR)/$(call libname,qpdf) |
| 2 | 2 | |
| 3 | +ifeq ($(MAINTAINER_MODE), 1) | |
| 4 | +ifeq ($(shell if ./generate_auto_job --check; then echo 0; else echo 1; fi), 1) | |
| 5 | +_ := $(shell ./generate_auto_job --generate) | |
| 6 | +endif | |
| 7 | +endif | |
| 8 | + | |
| 3 | 9 | INCLUDES_libqpdf = include libqpdf |
| 4 | 10 | LDFLAGS_libqpdf = -Llibqpdf/$(OUTPUT_DIR) |
| 5 | 11 | LIBS_libqpdf = -lqpdf | ... | ... |