mirror of
https://github.com/qpdf/qpdf.git
synced 2024-05-29 00:10:54 +00:00
ea96330bb6
Flatten everything to make it easier to map command-line flags to json. The old structure was an illusion anyway because there was no mechanism to enforce that things were in the right place. This also helps with future flexibility.
630 lines
25 KiB
Python
Executable File
630 lines
25 KiB
Python
Executable File
#!/usr/bin/env python3
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import os
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import sys
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import argparse
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import hashlib
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import re
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import yaml
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import json
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import filecmp
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from contextlib import contextmanager
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whoami = os.path.basename(sys.argv[0])
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BANNER = f'''//
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// This file is automatically generated by {whoami}.
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// Edits will be automatically overwritten if the build is
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// run in maintainer mode.
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//'''
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def warn(*args, **kwargs):
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print(*args, file=sys.stderr, **kwargs)
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@contextmanager
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def write_file(filename):
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tmpfile = filename + '.tmp'
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with open(tmpfile, 'w') as f:
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yield f
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if os.path.exists(filename) and filecmp.cmp(filename, tmpfile, False):
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os.unlink(tmpfile)
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else:
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os.rename(tmpfile, filename)
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class Main:
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SOURCES = [
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whoami,
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'manual/_ext/qpdf.py',
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'job.yml',
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'manual/cli.rst',
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]
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DESTS = {
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'decl': 'libqpdf/qpdf/auto_job_decl.hh',
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'init': 'libqpdf/qpdf/auto_job_init.hh',
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'help': 'libqpdf/qpdf/auto_job_help.hh',
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'schema': 'libqpdf/qpdf/auto_job_schema.hh',
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'json_decl': 'libqpdf/qpdf/auto_job_json_decl.hh',
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'json_init': 'libqpdf/qpdf/auto_job_json_init.hh',
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# Others are added in top
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}
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SUMS = 'job.sums'
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def main(self, args=sys.argv[1:], prog=whoami):
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options = self.parse_args(args, prog)
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self.top(options)
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def parse_args(self, args, prog):
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parser = argparse.ArgumentParser(
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prog=prog,
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description='Generate files for QPDFJob',
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)
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mxg = parser.add_mutually_exclusive_group(required=True)
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mxg.add_argument('--check',
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help='update checksums if files are not up to date',
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action='store_true', default=False)
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mxg.add_argument('--generate',
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help='generate files from sources',
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action='store_true', default=False)
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return parser.parse_args(args)
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def top(self, options):
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with open('job.yml', 'r') as f:
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data = yaml.safe_load(f.read())
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self.config_decls = {}
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self.declared_configs = set()
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for o in data['options']:
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config = o.get('config', None)
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if config is not None:
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self.DESTS[config] = f'include/qpdf/auto_job_{config}.hh'
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self.config_decls[config] = []
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if self.check_hashes():
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exit(0)
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elif options.check:
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exit(f'{whoami}: auto job inputs have changed')
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elif options.generate:
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self.generate(data)
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else:
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exit(f'{whoami} unknown mode')
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def get_hashes(self):
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hashes = {}
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for i in sorted([*self.SOURCES, *self.DESTS.values()]):
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m = hashlib.sha256()
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try:
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with open(i, 'rb') as f:
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m.update(f.read())
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hashes[i] = m.hexdigest()
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except FileNotFoundError:
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pass
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return hashes
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def check_hashes(self):
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hashes = self.get_hashes()
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match = False
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try:
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old_hashes = {}
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with open(self.SUMS, 'r') as f:
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for line in f.readlines():
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m = re.match(r'^(\S+) (\S+)\s*$', line)
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if m:
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old_hashes[m.group(1)] = m.group(2)
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match = old_hashes == hashes
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except Exception:
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pass
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return match
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def update_hashes(self):
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hashes = self.get_hashes()
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with open(self.SUMS, 'w') as f:
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print(f'# Generated by {whoami}', file=f)
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for k, v in hashes.items():
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print(f'{k} {v}', file=f)
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def generate_doc(self, df, f):
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st_top = 0
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st_topic = 1
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st_option = 2
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st_option_help = 3
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state = st_top
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indent = None
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topic = None
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option = None
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short_text = None
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long_text = None
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# Generate a bunch of short static functions rather than a big
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# member function for help. Some compilers have problems with
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# very large member functions in classes in anonymous
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# namespaces.
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help_files = 0
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help_lines = 0
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self.all_topics = set(self.options_without_help)
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self.referenced_topics = set()
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def set_indent(x):
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nonlocal indent
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indent = ' ' * len(x)
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def append_long_text(line, topic):
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nonlocal indent, long_text
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if line == '\n':
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long_text += '\n'
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elif line.startswith(indent):
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long_text += line[len(indent):]
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else:
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long_text = long_text.strip()
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if long_text == '':
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raise Exception(f'missing long text for {topic}')
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long_text += '\n'
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if 'help' not in topic:
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# Help for --help itself has --help=... not
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# referring to specific options.
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for i in re.finditer(r'--help=([^\.\s]+)', long_text):
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self.referenced_topics.add(i.group(1))
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return True
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return False
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lineno = 0
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for line in df.readlines():
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if help_lines == 0:
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if help_files > 0:
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print('}', file=f)
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help_files += 1
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help_lines += 1
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print(f'static void add_help_{help_files}(QPDFArgParser& ap)\n'
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'{', file=f)
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lineno += 1
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if state == st_top:
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m = re.match(r'^(\s*\.\. )help-topic (\S+): (.*)$', line)
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if m:
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set_indent(m.group(1))
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topic = m.group(2)
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short_text = m.group(3)
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long_text = ''
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state = st_topic
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continue
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m = re.match(
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r'^(\s*\.\. )qpdf:option:: (([^=\[\s]+)([\[= ](.+))?)$',
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line)
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if m:
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if topic is None:
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raise Exception('option seen before topic')
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set_indent(m.group(1))
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option = m.group(3)
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synopsis = m.group(2)
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if synopsis.endswith('`'):
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raise Exception(
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f'stray ` at end of option line (line {lineno})')
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if synopsis != option:
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long_text = synopsis + '\n'
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else:
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long_text = ''
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state = st_option
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continue
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elif state == st_topic:
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if append_long_text(line, topic):
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self.all_topics.add(topic)
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print(f'ap.addHelpTopic("{topic}", "{short_text}",'
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f' R"({long_text})");', file=f)
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help_lines += 1
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state = st_top
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elif state == st_option:
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if line == '\n' or line.startswith(indent):
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m = re.match(r'^(\s*\.\. )help: (.*)$', line)
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if m:
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set_indent(m.group(1))
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short_text = m.group(2)
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state = st_option_help
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else:
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raise Exception('option without help text')
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state = st_top
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elif state == st_option_help:
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if append_long_text(line, option):
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if option in self.options_without_help:
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self.options_without_help.remove(option)
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else:
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raise Exception(
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f'help for unknown option {option},'
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f' lineno={lineno}')
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if option not in self.help_options:
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self.jdata[option[2:]]['help'] = short_text
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print(f'ap.addOptionHelp("{option}", "{topic}",'
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f' "{short_text}", R"({long_text})");', file=f)
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help_lines += 1
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state = st_top
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if help_lines == 20:
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help_lines = 0
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print('}', file=f)
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print('static void add_help(QPDFArgParser& ap)\n{', file=f)
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for i in range(help_files):
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print(f' add_help_{i+1}(ap);', file=f)
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print('ap.addHelpFooter("For detailed help, visit'
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' the qpdf manual: https://qpdf.readthedocs.io\\n");', file=f)
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print('}\n', file=f)
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for i in self.referenced_topics:
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if i not in self.all_topics:
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raise Exception(f'help text referenced --help={i}')
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for i in self.options_without_help:
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raise Exception(
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'Options without help: ' +
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', '.join(self.options_without_help))
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def generate(self, data):
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warn(f'{whoami}: regenerating auto job files')
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self.validate(data)
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# Add the built-in help options to tables that we populate as
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# we read job.yml since we won't encounter these in job.yml
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self.help_options = set(
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['--completion-bash', '--completion-zsh', '--help']
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)
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self.options_without_help = set(self.help_options)
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self.prepare(data)
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with write_file(self.DESTS['decl']) as f:
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print(BANNER, file=f)
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for i in self.decls:
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print(i, file=f)
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with write_file(self.DESTS['init']) as f:
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print(BANNER, file=f)
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for i in self.init:
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print(i, file=f)
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with write_file(self.DESTS['help']) as f:
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with open('manual/cli.rst', 'r') as df:
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print(BANNER, file=f)
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self.generate_doc(df, f)
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self.generate_schema(data)
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with write_file(self.DESTS['schema']) as f:
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print('static constexpr char const* JOB_SCHEMA_DATA = R"(' +
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json.dumps(self.schema, indent=2, separators=(',', ': ')) +
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')";', file=f)
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for k, v in self.config_decls.items():
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with write_file(self.DESTS[k]) as f:
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print(BANNER, file=f)
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for i in v:
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print(i, file=f)
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with write_file(self.DESTS['json_decl']) as f:
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print(BANNER, file=f)
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for i in self.json_decls:
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print(i, file=f)
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with write_file(self.DESTS['json_init']) as f:
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print(BANNER, file=f)
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for i in self.json_init:
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print(i, file=f)
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# Update hashes last to ensure that this will be rerun in the
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# event of a failure.
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self.update_hashes()
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# DON'T ADD CODE TO generate AFTER update_hashes
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def handle_trivial(self, i, identifier, cfg, prefix, kind, v):
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decl_arg = 1
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if kind == 'bare':
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decl_arg = 0
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self.init.append(f'this->ap.addBare("{i}", '
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f'[this](){{{cfg}->{identifier}();}});')
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elif kind == 'optional_parameter':
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self.init.append(f'this->ap.addOptionalParameter("{i}", '
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f'[this](char *x){{{cfg}->{identifier}(x);}});')
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elif kind == 'required_parameter':
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self.init.append(f'this->ap.addRequiredParameter("{i}", '
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f'[this](char *x){{{cfg}->{identifier}(x);}}'
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f', "{v}");')
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elif kind == 'required_choices':
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self.init.append(f'this->ap.addChoices("{i}", '
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f'[this](char *x){{{cfg}->{identifier}(x);}}'
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f', true, {v}_choices);')
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elif kind == 'optional_choices':
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self.init.append(f'this->ap.addChoices("{i}", '
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f'[this](char *x){{{cfg}->{identifier}(x);}}'
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f', false, {v}_choices);')
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# Generate declarations for config methods separately by
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# config object.
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config_prefix = prefix + 'Config'
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arg = ''
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if decl_arg:
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arg = 'char const* parameter'
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fn = f'{config_prefix}* {identifier}({arg})'
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if fn not in self.declared_configs:
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self.declared_configs.add(fn)
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self.config_decls[cfg].append(f'QPDF_DLL {fn};')
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def handle_flag(self, i, identifier, kind, v):
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if kind == 'bare':
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self.decls.append(f'void {identifier}();')
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self.init.append(f'this->ap.addBare("{i}", '
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f'b(&ArgParser::{identifier}));')
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elif kind == 'optional_parameter':
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self.decls.append(f'void {identifier}(char *);')
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self.init.append(f'this->ap.addOptionalParameter("{i}", '
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f'p(&ArgParser::{identifier}));')
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elif kind == 'required_parameter':
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self.decls.append(f'void {identifier}(char *);')
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self.init.append(f'this->ap.addRequiredParameter("{i}", '
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f'p(&ArgParser::{identifier})'
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f', "{v}");')
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elif kind == 'required_choices':
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self.decls.append(f'void {identifier}(char *);')
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self.init.append(f'this->ap.addChoices("{i}", '
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f'p(&ArgParser::{identifier})'
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f', true, {v}_choices);')
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elif kind == 'optional_choices':
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self.decls.append(f'void {identifier}(char *);')
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self.init.append(f'this->ap.addChoices("{i}", '
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f'p(&ArgParser::{identifier})'
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f', false, {v}_choices);')
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def prepare(self, data):
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self.decls = []
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self.init = []
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self.json_decls = []
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self.json_init = []
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self.jdata = {}
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self.by_table = {}
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def add_jdata(flag, table, details):
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nonlocal self
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if table == 'help':
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self.help_options.add(f'--{flag}')
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elif flag in self.jdata:
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self.jdata[flag]['tables'][table] = details
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else:
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self.jdata[flag] = {
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'tables': {table: details},
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}
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self.init.append('auto b = [this](void (ArgParser::*f)()) {')
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self.init.append(' return QPDFArgParser::bindBare(f, this);')
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self.init.append('};')
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self.init.append('auto p = [this](void (ArgParser::*f)(char *)) {')
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self.init.append(' return QPDFArgParser::bindParam(f, this);')
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self.init.append('};')
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self.init.append('')
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for k, v in data['choices'].items():
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s = f'static char const* {k}_choices[] = {{'
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for i in v:
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s += f'"{i}", '
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s += '0};'
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self.init.append(s)
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self.json_init.append(s)
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self.init.append('')
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self.json_init.append('')
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for o in data['options']:
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table = o['table']
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if table in ('main', 'help'):
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continue
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i = self.to_identifier(table, 'O', True)
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self.decls.append(f'static constexpr char const* {i} = "{table}";')
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self.decls.append('')
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for o in data['options']:
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table = o['table']
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config = o.get('config', None)
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table_prefix = o.get('prefix', '')
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arg_prefix = 'arg' + table_prefix
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config_prefix = o.get('config_prefix', table_prefix)
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manual = o.get('manual', [])
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json_prefix = table_prefix or table
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self.by_table[json_prefix] = {
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'config': config,
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'manual': manual,
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}
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if table == 'main':
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self.init.append('this->ap.selectMainOptionTable();')
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elif table == 'help':
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self.init.append('this->ap.selectHelpOptionTable();')
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else:
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identifier = self.to_identifier(table, 'argEnd', False)
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self.init.append(f'this->ap.registerOptionTable("{table}",'
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f' b(&ArgParser::{identifier}));')
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if o.get('positional', False):
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self.decls.append(f'void {arg_prefix}Positional(char*);')
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self.init.append('this->ap.addPositional('
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f'p(&ArgParser::{arg_prefix}Positional));')
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flags = {}
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for i in o.get('bare', []):
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flags[i] = ['bare', None]
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for i in o.get('optional_parameter', []):
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flags[i] = ['optional_parameter', None]
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for i, v in o.get('required_parameter', {}).items():
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flags[i] = ['required_parameter', v]
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for i, v in o.get('required_choices', {}).items():
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flags[i] = ['required_choices', v]
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for i, v in o.get('optional_choices', {}).items():
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flags[i] = ['optional_choices', v]
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self.options_without_help.add(f'--{i}')
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for i, [kind, v] in flags.items():
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self.options_without_help.add(f'--{i}')
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add_jdata(i, json_prefix, [kind, v])
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if config is None or i in manual:
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identifier = self.to_identifier(i, arg_prefix, False)
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self.handle_flag(i, identifier, kind, v)
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else:
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identifier = self.to_identifier(i, '', False)
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self.handle_trivial(
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i, identifier, config, config_prefix, kind, v)
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if table not in ('main', 'help'):
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identifier = self.to_identifier(table, 'argEnd', False)
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self.decls.append(f'void {identifier}();')
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def handle_json_trivial(self, flag_key, fdata):
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config = None
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for t, [kind, v] in fdata['tables'].items():
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# We have determined that all tables, if multiple, have
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# the same config.
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tdata = self.by_table[t]
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config = tdata['config']
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if kind == 'bare':
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self.json_init.append(
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f'addBare([this]() {{ {config}->{flag_key}(); }});')
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elif kind == 'optional_parameter' or kind == 'required_parameter':
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# No optional parameters in json
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self.json_init.append(
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f'addParameter([this](char const* p)'
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f' {{ {config}->{flag_key}(p); }});')
|
|
elif kind == 'optional_choices' or kind == 'required_choices':
|
|
# No optional choices in json
|
|
self.json_init.append(
|
|
f'addChoices({v}_choices,'
|
|
f' [this](char const* p) {{ {config}->{flag_key}(p); }});')
|
|
|
|
def handle_json_manual(self, path):
|
|
method = re.sub(r'\.([a-zA-Z0-9])',
|
|
lambda x: x.group(1).upper(),
|
|
f'setup{path}')
|
|
self.json_decls.append(f'void {method}();')
|
|
self.json_init.append(f'{method}();')
|
|
|
|
def option_to_json_key(self, s):
|
|
return self.to_identifier(s, '', False)
|
|
|
|
def flag_to_schema_key(self, k):
|
|
if k.startswith('_'):
|
|
schema_key = k[1:]
|
|
else:
|
|
schema_key = re.sub(r'[^\.]+\.', '', k)
|
|
return self.option_to_json_key(schema_key)
|
|
|
|
def build_schema(self, j, path, flag, expected, options_seen):
|
|
if flag in expected:
|
|
options_seen.add(flag)
|
|
elif isinstance(j, str):
|
|
if not flag.startswith('_'):
|
|
raise Exception(f'json: {flag} has a description'
|
|
' but doesn\'t start with _')
|
|
elif not (flag == '' or flag.startswith('_')):
|
|
raise Exception(f'json: unknown key {flag}')
|
|
|
|
if isinstance(j, dict):
|
|
schema_value = {}
|
|
if flag:
|
|
identifier = self.to_identifier(path, '', False)
|
|
self.json_decls.append(f'void begin{identifier}(JSON);')
|
|
self.json_decls.append(f'void end{identifier}();')
|
|
self.json_init.append(
|
|
f'beginDict(bindJSON(&Handlers::begin{identifier}),'
|
|
f' bindBare(&Handlers::end{identifier})); // {path}')
|
|
for k, v in j.items():
|
|
schema_key = self.flag_to_schema_key(k)
|
|
subpath = f'{path}.{schema_key}'
|
|
self.json_init.append(f'pushKey("{schema_key}");')
|
|
schema_value[schema_key] = self.build_schema(
|
|
v, subpath, k, expected, options_seen)
|
|
self.json_init.append(f'popHandler(); // key: {schema_key}')
|
|
elif isinstance(j, list):
|
|
if len(j) != 1:
|
|
raise Exception('json contains array with length != 1')
|
|
identifier = self.to_identifier(path, '', False)
|
|
self.json_decls.append(f'void begin{identifier}Array(JSON);')
|
|
self.json_decls.append(f'void end{identifier}Array();')
|
|
self.json_init.append(
|
|
f'beginArray(bindJSON(&Handlers::begin{identifier}Array),'
|
|
f' bindBare(&Handlers::end{identifier}Array));'
|
|
f' // {path}[]')
|
|
schema_value = [
|
|
self.build_schema(j[0], path, flag,
|
|
expected, options_seen)
|
|
]
|
|
self.json_init.append(
|
|
f'popHandler(); // array: {path}[]')
|
|
else:
|
|
schema_value = j
|
|
if schema_value is None:
|
|
schema_value = re.sub(
|
|
r'--(\S+)',
|
|
lambda x: self.option_to_json_key(x.group(1)),
|
|
expected[flag]['help'])
|
|
is_trivial = False
|
|
if flag in expected:
|
|
is_trivial = True
|
|
common_config = None
|
|
for t in expected[flag]['tables']:
|
|
tdata = self.by_table[t]
|
|
if flag in tdata['manual']:
|
|
is_trivial = False
|
|
if common_config is None:
|
|
common_config = tdata['config']
|
|
elif common_config != tdata['config']:
|
|
is_trivial = False
|
|
config_key = self.flag_to_schema_key(flag)
|
|
if is_trivial:
|
|
self.handle_json_trivial(config_key, expected[flag])
|
|
else:
|
|
self.handle_json_manual(path)
|
|
return schema_value
|
|
|
|
def generate_schema(self, data):
|
|
# Check to make sure that every command-line option is
|
|
# represented in data['json'].
|
|
|
|
# Build a list of options that we expect. If an option appears
|
|
# once, we just expect to see it once. If it appears in more
|
|
# than one options table, we need to see a separate version of
|
|
# it for each option table. It is represented in job.yml
|
|
# prepended with the table prefix. The table prefix is removed
|
|
# in the schema.
|
|
expected = {}
|
|
for k, v in self.jdata.items():
|
|
tables = v['tables']
|
|
if len(tables) == 1:
|
|
expected[k] = {**v}
|
|
else:
|
|
for t in sorted(tables):
|
|
expected[f'{t}.{k}'] = {**v}
|
|
options_seen = set()
|
|
|
|
# Walk through the json information building the schema as we
|
|
# go. This verifies consistency between command-line options
|
|
# and the json section of the data and builds up a schema by
|
|
# populating with help information as available.
|
|
self.schema = self.build_schema(
|
|
data['json'], '', '', expected, options_seen)
|
|
if options_seen != set(expected.keys()):
|
|
raise Exception('missing from json: ' +
|
|
str(set(expected.keys()) - options_seen))
|
|
|
|
def check_keys(self, what, d, exp):
|
|
if not isinstance(d, dict):
|
|
exit(f'{what} is not a dictionary')
|
|
actual = set(d.keys())
|
|
extra = actual - exp
|
|
if extra:
|
|
exit(f'{what}: unknown keys = {extra}')
|
|
|
|
def validate(self, data):
|
|
self.check_keys('top', data, set(
|
|
['choices', 'options', 'json']))
|
|
for o in data['options']:
|
|
self.check_keys('top', o, set(
|
|
['table', 'prefix', 'config', 'config_prefix',
|
|
'manual', 'bare', 'positional',
|
|
'optional_parameter', 'required_parameter',
|
|
'required_choices', 'optional_choices']))
|
|
|
|
def to_identifier(self, label, prefix, const):
|
|
identifier = re.sub(r'[^a-zA-Z0-9]', '_', label)
|
|
if const:
|
|
identifier = f'{prefix}_{identifier.upper()}'
|
|
else:
|
|
if prefix:
|
|
identifier = f'{prefix}_{identifier}'
|
|
identifier = re.sub(r'_([a-z])',
|
|
lambda x: x.group(1).upper(),
|
|
identifier).replace('_', '')
|
|
return identifier
|
|
|
|
|
|
if __name__ == '__main__':
|
|
try:
|
|
os.chdir(os.path.dirname(os.path.realpath(__file__)))
|
|
Main().main()
|
|
except KeyboardInterrupt:
|
|
exit(130)
|