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#!/usr/bin/env python3
#
# Copyright (C) 2023 by Michael Olbrich <m.olbrich@pengutronix.de>
#
# For further information about the PTXdist project and license conditions
# see the README file.
#
from os import path, environ, makedirs
from chardet.universaldetector import UniversalDetector
from datetime import datetime
from multiprocessing import Pool
from dot2tex import dot2tex
from shutil import copy
import argparse
import jinja2
import re
import yaml
import subprocess
import hashlib
import spdx
import uuid
class ReportException(BaseException):
pass
def find_file(search_path, name):
for file in [path.join(d, name) for d in search_path]:
if path.exists(file):
return file
return None
class Generator:
def __init__(self, args):
self.input_suffix = '.txt'
self.output_suffix = '.txt'
self._data = args.input
self.__template = args.template
self.__output = args.output
self._output_dir = args.output_dir or ''
self._env = args.env or []
self._open_mode = 'w'
self.verbose = args.verbose
self.detector = UniversalDetector()
self.path = args.path
def create_loader(self):
return jinja2.ChoiceLoader([jinja2.FileSystemLoader(d) for d in self.path])
def escape(self, text):
return text
def raise_exception(self, message):
raise ReportException(message)
def build_chapter(self, pkg):
chapter = self.escape(pkg.get('name'))
chapter = chapter.removeprefix('host-').removeprefix('cross-')
if pkg.get('licenses', '').find('proprietary') >= 0:
chapter += ' *** Proprietary License!'
if pkg.get('licenses', '').find('unknown') >= 0:
chapter += ' *** Unknown License!'
return chapter
def source_file(self, name):
raw = True
if path.exists(name + '.utf-8'):
name = name + '.utf-8'
raw = False
if self.verbose:
print(f'Reading "{name}" ...')
if raw:
raw_data = open(name, 'rb').read()
try:
data = raw_data.decode('UTF-8')
except UnicodeDecodeError:
self.detector.reset()
self.detector.feed(raw_data)
self.detector.close()
encoding = self.detector.result['encoding']
if self.verbose:
print(f'Assuming encoding {encoding}.')
data = raw_data.decode(encoding)
else:
data = open(name, encoding='utf-8').read()
return data.replace('\f', '\n')
def create_dot_recurse(self, pkgs, pkg, level, hit_deps):
if level > 3:
return ''
display_name = self.escape(
pkg['name'].removeprefix('host-').removeprefix('cross-'))
licenses = self.escape(pkg['licenses']).split()
licenses = ' '.join(i + '\\\\' * (w % 3 == 2)
for w, i in enumerate(licenses))
data = """"%s" [ shape=box style="rounded corners" fixedsize=false texlbl="\\small\\begin{tabular}{c}{\\Large\\hyperref[%s]{%s}}\\\\%s\\end{tabular}" ];
""" % (pkg['name'], pkg['name'], self.escape(pkg['name']), licenses)
if 'builddeps' not in pkg:
return data
for dep in pkg['builddeps']:
if f'{pkg["name"]} {dep}' in hit_deps:
continue
if dep not in pkgs:
continue
hit_deps.add(f'{pkg["name"]} {dep}')
data += """"%s" -> "%s"[dir=back];
""" % (pkg['name'], dep)
data += self.create_dot_recurse(pkgs,
pkgs[dep], level + 1, hit_deps)
return data
def create_dot(self, pkgs, pkg):
dot = """
digraph "%s" {
rankdir=LR;
ratio=compress;
nodesep=0.1;
ranksep=0.1;
node [ shape=point fixedsize=true width=0.1 ];
""" % pkg['name']
dot += self.create_dot_recurse(pkgs, pkg, 0, set())
dot += """}
"""
return dot
def load(self, data):
return yaml.load(open(data).read(), Loader=yaml.SafeLoader)
def setup_env(self, loader):
env = jinja2.Environment(
loader=loader, autoescape=jinja2.select_autoescape())
def _find_file(name):
return find_file(self.path, name)
def regex_replace(s, find, replace):
return re.sub(find, replace, s)
env.globals['find_file'] = _find_file
env.globals['source_file'] = self.source_file
env.globals['escape'] = self.escape
env.globals['raise'] = self.raise_exception
env.globals['build_chapter'] = self.build_chapter
env.globals['now'] = datetime.now().strftime('%c')
env.filters['regex_replace'] = regex_replace
for tmp in self._env:
tmp = tmp.split('=', 2)
env.globals[tmp[0]] = tmp[1]
return env
def build(self, data, loader):
env = self.setup_env(loader)
header = env.get_template("header" + self.input_suffix)
body = env.get_template("body" + self.input_suffix)
footer = env.get_template("footer" + self.input_suffix)
return header.render(**data) + body.render(**data) + footer.render(**data)
def write(self, file, document):
file.write(document)
def finalize(self, document, output):
if directory := path.dirname(output):
makedirs(directory, exist_ok=True)
with open(output, mode=self._open_mode) as f:
self.write(f, document)
return output
def output_name(self):
if self.__output:
output = self.__output
if not output.endswith(self.output_suffix):
output += self.output_suffix
else:
output = self.__template + self.output_suffix
return output
def run(self):
data = self.load(self._data)
try:
document = self.build(data, self.create_loader())
except jinja2.exceptions.TemplateNotFound:
raise ReportException(f'Invalid template "{self.__template}"!')
return self.finalize(document, self.output_name())
class LatexGenerator(Generator):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.input_suffix = '.tex'
self.output_suffix = '.pdf'
def escape(self, text):
return text.replace('_', '\\_').replace('&', '\\&')
def dot(self, pkg):
return self.__dot.get(pkg, None)
def format_dot(self, args):
dot = self.create_dot(args[0], args[1])
return (args[1]['name'], dot2tex(dot, docpreamble='\\usepackage[xetex]{hyperref}', figonly=True,
format='pgf', autosize=True))
def init_dot(self, pkgs, limit):
from dot2tex import dot2tex
if limit:
packages = {pkg: pkgs[pkg] for pkg in limit}
else:
packages = pkgs
with Pool() as pool:
dots = pool.map(self.format_dot, [
(packages, pkg) for pkg in packages.values()])
self.__dot = {}
for pkg, dot in dots:
self.__dot[pkg] = dot
def setup_env(self, loader):
env = super().setup_env(loader)
env.globals['init_dot'] = self.init_dot
env.globals['dot'] = self.dot
return env
def finalize(self, document, output):
base = output.removesuffix(self.output_suffix)
tmp = super().finalize(document, base + self.input_suffix)
env = environ.copy()
env['max_print_line'] = '1000'
output_directory = path.dirname(tmp) or '.'
aux_hash = None
print(f'generating {output}...')
while True:
ret = subprocess.run(['xelatex', '-halt-on-error', path.basename(tmp)], env=env,
capture_output=not self.verbose, text=True, cwd=path.realpath(output_directory))
if ret.returncode != 0:
if not self.verbose:
print(ret.stdout + ret.stderr)
raise ReportException('Failed to execute xelatex')
new_aux_hash = hashlib.sha256(
open(base + '.aux', 'rb').read()).hexdigest()
if aux_hash == new_aux_hash:
break
aux_hash = new_aux_hash
class SbomGenerator(Generator):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.output_suffix = '.json'
def setup_env(self):
env = {}
for tmp in self._env:
tmp = tmp.split('=', 2)
env[tmp[0]] = tmp[1]
return env
def run(self):
data = self.load(self._data)
document = self.build(data)
return self.finalize(document, self.output_name())
class SpdxSbomGenerator(SbomGenerator):
PYPI_RELEASE = re.compile(
'https://files.pythonhosted.org/packages/source/./([^/]*)/.*-([^-]*).(tar\..*|zip)')
GITHUB_TAG = re.compile(
'https://github.com/([^/]*)/([^/]*)/archive/(refs/tags/)?([^/]*).tar.gz')
GITHUB_RELEASE = re.compile(
'https://github.com/([^/]*)/([^/]*)/releases/download/([^/]*)/.*')
CARGO_RELEASE = re.compile(
'https://crates.io/api/v1/crates/([^/]*)/([^/]*)/download')
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self._open_mode = 'wb'
self.format = 'spdx'
def write(self, file, document):
document.to_json(file, sort_keys=True, indent=2)
def add_packages(self, pkgs):
for pkg in pkgs:
if pkg not in self.spdx_pkgs and pkg != self.current_pkg:
self.pkgs.add(pkg)
def build_package(self, document, pkg):
pkg_name = pkg['name']
if pkg_name in self.spdx_pkgs:
return None
if 'source-packages' in pkg:
self_pkg = pkg['source-packages'].pop(0)
assert self_pkg['name'] == pkg_name
pkg.update(self_pkg)
self.add_packages(pkg.get('builddeps', []))
self.add_packages(pkg.get('rundeps', []))
spdx_pkg = spdx.SPDXPackage()
spdx_pkg.name = pkg_name
spdx_pkg.SPDXID = 'SPDXRef-' + pkg_name
if 'version' in pkg:
spdx_pkg.versionInfo = pkg['version']
if 'url' in pkg:
spdx_pkg.downloadLocation = pkg['url'][0]
if 'licenses' in pkg:
spdx_pkg.licenseDeclared = pkg['licenses']
if 'source' in pkg:
spdx_pkg.packageFileName = path.basename(pkg['source'])
checksum = spdx.SPDXChecksum()
checksum.algorithm = 'MD5'
checksum.checksumValue = pkg['md5'].split(maxsplit=1)[0]
spdx_pkg.checksums.append(checksum)
document.packages.append(spdx_pkg)
self.spdx_pkgs[pkg_name] = spdx_pkg
for source in pkg.get('source-packages', []):
spdx_source = self.build_package(document, source)
if spdx_source:
document.add_relationship(
spdx_source, 'BUILD_DEPENDENCY_OF', spdx_pkg)
return spdx_pkg
def add_dependencies(self, document, pkg, spdx_pkg):
for dep in pkg.get('builddeps', []):
if dep not in self.spdx_pkgs:
raise ReportException(f'Missing packge "{dep}"')
spdx_dep = self.spdx_pkgs[dep]
if dep in pkg.get('rundeps', []):
document.add_relationship(spdx_dep, 'DEPENDENCY_OF', spdx_pkg)
else:
document.add_relationship(
spdx_dep, 'BUILD_DEPENDENCY_OF', spdx_pkg)
for dep in pkg.get('rundeps', []):
if dep not in self.spdx_pkgs:
raise ReportException(f'Missing packge "{dep}"')
spdx_dep = self.spdx_pkgs[dep]
if dep not in pkg.get('builddeps', []):
document.add_relationship(
spdx_dep, 'RUNTIME_DEPENDENCY_OF', spdx_pkg)
for dep in pkg.get('pkgs', []):
if dep not in self.spdx_pkgs:
raise ReportException(f'Missing packge "{dep}"')
spdx_dep = self.spdx_pkgs[dep]
document.add_relationship(spdx_pkg, 'CONTAINS', spdx_dep)
def generate_purls(self, pkg):
purls = []
for url in pkg.get('url', []):
if m := self.PYPI_RELEASE.match(url):
if m.group(2) != pkg['version']:
ReportException(
f'{pkg["name"]}: version mismatch: pkg: {pkg["version"]} url: {m.group(2)}')
purls.append(f'pkg:pypi/{m.group(1)}@{m.group(2)}')
elif m := self.GITHUB_TAG.match(url):
purls.append(
f'pkg:github/{m.group(1)}/{m.group(2)}@{m.group(4)}')
elif m := self.GITHUB_RELEASE.match(url):
purls.append(
f'pkg:github/{m.group(1)}/{m.group(2)}@{m.group(3)}')
elif m := self.CARGO_RELEASE.match(url):
purls.append(f'pkg:cargo/{m.group(1)}@{m.group(2)}')
else:
if url.startswith('https://files.pythonhosted.org') or url.startswith('https://github.com') or url.startswith('https://crates.io'):
raise ReportException(
f'{pkg["name"]}: url "{url}" should match purl pattern')
return purls
def import_pkg_spdx(self, pkg):
if 'spdx-sbom' not in pkg:
return (None, None, None)
src = pkg['spdx-sbom']
dst = path.join(self._output_dir, f'spdx-sbom-{pkg["name"]}.json')
copy(src, dst)
with open(dst, 'rb') as f:
doc = spdx.SPDXDocument.from_json(f)
f.seek(0)
sha1 = hashlib.file_digest(f, 'sha1')
return (doc, dst, sha1.hexdigest())
def add_external_refs(self, document, pkg, spdx_pkg):
purls = self.generate_purls(pkg)
for purl in purls:
ref = spdx.SPDXExternalReference()
ref.referenceCategory = 'PACKAGE-MANAGER'
ref.referenceType = 'purl'
ref.referenceLocator = purl
spdx_pkg.externalRefs.append(ref)
if 'git-commit' in pkg:
ref = spdx.SPDXExternalReference()
ref.referenceCategory = 'PERSISTENT-ID'
ref.referenceType = 'gitoid'
ref.referenceLocator = f'gitoid:commit:sha1:{pkg["git-commit"]}'
spdx_pkg.externalRefs.append(ref)
pkg_doc, pkg_doc_path, pkg_doc_sha1 = self.import_pkg_spdx(pkg)
if pkg_doc:
ref = spdx.SPDXExternalDocumentRef()
ref.externalDocumentId = "DocumentRef-package-" + pkg_doc.name
ref.spdxDocument = pkg_doc.documentNamespace
ref.checksum.algorithm = "SHA1"
ref.checksum.checksumValue = pkg_doc_sha1
document.externalDocumentRefs.append(ref)
document.add_relationship(
ref.externalDocumentId, 'AMENDS', spdx_pkg)
def build(self, data):
creationInfo = spdx.SPDXCreationInfo()
creationInfo.created = datetime.now().isoformat()
creationInfo.creators = [data['bsp']['vendor']]
document = spdx.SPDXDocument()
document.creationInfo = creationInfo
document.name = data['bsp']['project']
namespace_uuid = uuid.uuid5(uuid.NAMESPACE_DNS, 'sbom.ptxdist.org')
document.documentNamespace = f'http://spdx.org/spdxdoc/{document.name}/{namespace_uuid}'
self.pkgs = set()
self.current_pkg = None
self.spdx_pkgs = {}
env = self.setup_env()
if target := env.get('TARGET'):
self.add_packages([target])
else:
self.add_packages(data['images'].keys())
self.add_packages(data['packages'].keys())
while self.pkgs:
self.current_pkg = self.pkgs.pop()
if self.current_pkg in data['images']:
self.add_packages(
set(data['images'][self.current_pkg].get('pkgs', ())))
self.build_package(document, data['images'][self.current_pkg])
else:
self.build_package(
document, data['packages'][self.current_pkg])
for pkg_name in self.spdx_pkgs:
if pkg_name in data['packages']:
pkg = data['packages'][pkg_name]
elif pkg_name in data['images']:
pkg = data['images'][pkg_name]
else:
# source packages are not globaly listed and have no dependencies
continue
spdx_pkg = self.spdx_pkgs[pkg_name]
self.add_dependencies(document, pkg, spdx_pkg)
self.add_external_refs(document, pkg, spdx_pkg)
if target:
document.add_relationship(
document, 'DESCRIBES', self.spdx_pkgs[target])
return document
def main():
parser = argparse.ArgumentParser()
parser.add_argument('-t', '--template', help='Template to use')
parser.add_argument(
'-p', '--path', help='Colon separated search path that contain the templates')
parser.add_argument('-o', '--output', help='Output file name')
parser.add_argument('-d', '--output-dir',
help='Output directory for additional')
parser.add_argument('-i', '--input', help='Input file name')
parser.add_argument(
'-e', '--env', help='Extra variables for the jinja2 env', action='append')
parser.add_argument('-g', '--generator',
help='Generator to use (plain, latex)')
parser.add_argument('-v', '--verbose', action='store_true')
args = parser.parse_args()
args.path = [path.abspath(path.join(d, args.template))
for d in args.path.split(':')] if args.path else ['']
if not args.generator and args.template in ('spdx-sbom'):
args.generator = args.template
if not args.output_dir and args.output:
args.output_dir = path.dirname(args.output)
if not args.generator:
file = find_file(args.path, 'generator')
if file:
args.generator = open(file).read().strip()
else:
args.generator = 'latex'
if args.generator == 'plain':
generator = Generator(args)
elif args.generator == 'latex':
generator = LatexGenerator(args)
elif args.generator == 'spdx-sbom':
generator = SpdxSbomGenerator(args)
else:
raise ReportException(f'Invalid generator type: "{args.generator}"')
generator.run()
if __name__ == "__main__":
try:
main()
except ReportException as e:
print(f'Report Generation failed: {e.args[0]}')
exit(1)
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