131 lines
5.2 KiB
Python
Executable file
131 lines
5.2 KiB
Python
Executable file
#! /usr/bin/env nix-shell
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#! nix-shell -i python3 -p "python3.withPackages (ps: with ps; [ attrs ])
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#
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# This script downloads Home Assistant's source tarball.
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# Inside the homeassistant/components directory, each integration has an associated manifest.json,
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# specifying required packages and other integrations it depends on:
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#
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# {
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# "requirements": [ "package==1.2.3" ],
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# "dependencies": [ "component" ]
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# }
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#
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# By parsing the files, a dictionary mapping integrations to requirements and dependencies is created.
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# For all of these requirements and the dependencies' requirements,
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# nixpkgs' python3Packages are searched for appropriate names.
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# Then, a Nix attribute set mapping integration name to dependencies is created.
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from io import BytesIO
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import json
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import pathlib
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import os
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import re
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import subprocess
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import sys
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import tempfile
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import tarfile
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from urllib.request import urlopen
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COMPONENT_PREFIX = 'homeassistant.components'
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PKG_SET = 'python3Packages'
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# If some requirements are matched by multiple python packages,
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# the following can be used to choose one of them
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PKG_PREFERENCES = {
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# Use python3Packages.youtube-dl-light instead of python3Packages.youtube-dl
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'youtube-dl': 'youtube-dl-light',
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'tensorflow-bin': 'tensorflow',
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'tensorflowWithoutCuda': 'tensorflow'
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}
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def get_version():
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with open(os.path.dirname(sys.argv[0]) + '/default.nix') as f:
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# A version consists of digits, dots, and possibly a "b" (for beta)
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m = re.search('hassVersion = "([\\d\\.b]+)";', f.read())
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return m.group(1)
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def parse_components(version='master'):
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components = {}
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with tempfile.TemporaryDirectory() as tmp:
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with urlopen(f'https://github.com/home-assistant/home-assistant/archive/{version}.tar.gz') as response:
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tarfile.open(fileobj=BytesIO(response.read())).extractall(tmp)
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# Use part of a script from the Home Assistant codebase
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sys.path.append(os.path.join(tmp, f'home-assistant-{version}'))
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from script.hassfest.model import Integration
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integrations = Integration.load_dir(pathlib.Path(
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os.path.join(tmp, f'home-assistant-{version}', 'homeassistant/components')
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))
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for domain in sorted(integrations):
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integration = integrations[domain]
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components[domain] = integration.manifest
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return components
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# Recursively get the requirements of a component and its dependencies
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def get_reqs(components, component):
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requirements = set(components[component]['requirements'])
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for dependency in components[component]['dependencies']:
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requirements.update(get_reqs(components, dependency))
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return requirements
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# Store a JSON dump of Nixpkgs' python3Packages
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output = subprocess.check_output(['nix-env', '-f', os.path.dirname(sys.argv[0]) + '/../../..', '-qa', '-A', PKG_SET, '--json'])
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packages = json.loads(output)
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def name_to_attr_path(req):
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attr_paths = set()
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names = [req]
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# E.g. python-mpd2 is actually called python3.6-mpd2
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# instead of python-3.6-python-mpd2 inside Nixpkgs
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if req.startswith('python-') or req.startswith('python_'):
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names.append(req[len('python-'):])
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for name in names:
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# treat "-" and "_" equally
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name = re.sub('[-_]', '[-_]', name)
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pattern = re.compile('^python\\d\\.\\d-{}-\\d'.format(name), re.I)
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for attr_path, package in packages.items():
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if pattern.match(package['name']):
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attr_paths.add(attr_path)
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if len(attr_paths) > 1:
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for to_replace, replacement in PKG_PREFERENCES.items():
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try:
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attr_paths.remove(PKG_SET + '.' + to_replace)
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attr_paths.add(PKG_SET + '.' + replacement)
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except KeyError:
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pass
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# Let's hope there's only one derivation with a matching name
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assert len(attr_paths) <= 1, "{} matches more than one derivation: {}".format(req, attr_paths)
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if len(attr_paths) == 1:
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return attr_paths.pop()
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else:
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return None
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version = get_version()
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print('Generating component-packages.nix for version {}'.format(version))
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components = parse_components(version=version)
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build_inputs = {}
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for component in sorted(components.keys()):
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attr_paths = []
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for req in sorted(get_reqs(components, component)):
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# Some requirements are specified by url, e.g. https://example.org/foobar#xyz==1.0.0
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# Therefore, if there's a "#" in the line, only take the part after it
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req = req[req.find('#') + 1:]
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name = req.split('==')[0]
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attr_path = name_to_attr_path(name)
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if attr_path is not None:
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# Add attribute path without "python3Packages." prefix
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attr_paths.append(attr_path[len(PKG_SET + '.'):])
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else:
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build_inputs[component] = attr_paths
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with open(os.path.dirname(sys.argv[0]) + '/component-packages.nix', 'w') as f:
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f.write('# Generated by parse-requirements.py\n')
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f.write('# Do not edit!\n\n')
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f.write('{\n')
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f.write(' version = "{}";\n'.format(version))
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f.write(' components = {\n')
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for component, attr_paths in build_inputs.items():
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f.write(' "{}" = ps: with ps; [ '.format(component))
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f.write(' '.join(attr_paths))
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f.write(' ];\n')
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f.write(' };\n')
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f.write('}\n')
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