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#!/usr/bin/env python |
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# Licensed to the StackStorm, Inc ('StackStorm') under one or more |
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# contributor license agreements. See the NOTICE file distributed with |
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# this work for additional information regarding copyright ownership. |
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# The ASF licenses this file to You under the Apache License, Version 2.0 |
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# (the "License"); you may not use this file except in compliance with |
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# the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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""" |
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This script is used to automate generation of requirements.txt for st2 components. |
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The idea behind this script is that that each component has it's own requirements |
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"in-requirements.txt" file. in-requirements.txt is an input requirements file - |
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a requirements file with dependencies but WITHOUT any version restrictions. |
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In addition to this file, there's also the top-level "fixed-requirements.txt" |
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which pins production versions for the whole st2 stack. During production use |
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(building, packaging, etc) requirements.txt is generated from in-requirements.txt |
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where version of packages are fixed according to fixed-requirements.txt. |
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""" |
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import argparse |
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import os |
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import os.path |
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import sys |
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from distutils.version import StrictVersion |
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OSCWD = os.path.abspath(os.curdir) |
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GET_PIP = ' curl https://bootstrap.pypa.io/get-pip.py | python' |
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try: |
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import pip |
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from pip.req import parse_requirements |
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except ImportError: |
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print 'Download pip:\n', GET_PIP |
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sys.exit(1) |
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def parse_args(): |
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parser = argparse.ArgumentParser(description='Tool for requirements.txt generation.') |
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parser.add_argument('-s', '--source-requirements', nargs='+', |
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required=True, |
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help='Specify paths to requirements file(s). ' |
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'In case several requirements files are given their content is merged.') |
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parser.add_argument('-f', '--fixed-requirements', required=True, |
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help='Specify path to fixed-requirements.txt file.') |
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parser.add_argument('-o', '--output-file', default='requirements.txt', |
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help='Specify path to the resulting requirements file.') |
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if len(sys.argv) < 2: |
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parser.print_help() |
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sys.exit(1) |
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return vars(parser.parse_args()) |
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def check_pip_version(): |
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if StrictVersion(pip.__version__) < StrictVersion('6.1.0'): |
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print "Upgrade pip, your version `{0}' "\ |
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"is outdated:\n".format(pip.__version__), GET_PIP |
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sys.exit(1) |
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def load_requirements(file_path): |
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return tuple((r for r in parse_requirements(file_path, session=False))) |
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def locate_file(path, must_exist=False): |
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if not os.path.isabs(path): |
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path = os.path.join(OSCWD, path) |
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if must_exist and not os.path.isfile(path): |
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print("Error: couldn't locate file `{0}'".format(path)) |
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return path |
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def merge_source_requirements(sources): |
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""" |
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Read requirements source files and merge it's content. |
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""" |
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projects = set() |
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merged_requirements = [] |
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for infile_path in (locate_file(p, must_exist=True) for p in sources): |
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for req in load_requirements(infile_path): |
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# Requirements starting with project name "project ..." |
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if req.req: |
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# Skip already added project name |
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if req.req.project_name in projects: |
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continue |
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projects.add(req.req.project_name) |
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merged_requirements.append(req) |
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# Requirements lines like "vcs+proto://url" |
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elif req.link: |
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merged_requirements.append(req) |
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else: |
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raise RuntimeError('Unexpected requirement {0}'.format(req)) |
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return merged_requirements |
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def write_requirements(sources=None, fixed_requirements=None, output_file=None): |
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""" |
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Write resulting requirements taking versions from the fixed_requirements. |
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""" |
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requirements = merge_source_requirements(sources) |
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fixed = load_requirements(locate_file(fixed_requirements, must_exist=True)) |
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# Make sure there are no duplicate / conflicting definitions |
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fixedreq_hash = {} |
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for req in fixed: |
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project_name = req.req.project_name |
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if not req.req: |
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continue |
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if project_name in fixedreq_hash: |
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raise ValueError('Duplicate definition for dependency "%s"' % (project_name)) |
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fixedreq_hash[project_name] = req |
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lines_to_write = [] |
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links = set() |
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for req in requirements: |
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# we don't have any idea how to process links, so just add them |
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if req.link and req.link not in links: |
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links.add(req.link) |
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rline = str(req.link) |
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elif req.req: |
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project = req.req.project_name |
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if project in fixedreq_hash: |
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rline = str(fixedreq_hash[project].req) |
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else: |
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rline = str(req.req) |
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lines_to_write.append(rline) |
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# Sort the lines to guarantee a stable order |
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lines_to_write = sorted(lines_to_write) |
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data = '\n'.join(lines_to_write) + '\n' |
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with open(output_file, 'w') as fp: |
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fp.write('# Don\'t edit this file. It\'s generated automatically!\n') |
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fp.write(data) |
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print('Requirements written to: {0}'.format(output_file)) |
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if __name__ == '__main__': |
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check_pip_version() |
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args = parse_args() |
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write_requirements(sources=args['source_requirements'], |
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fixed_requirements=args['fixed_requirements'], |
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output_file=args['output_file']) |
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StackStorm /
st2
