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[Notes] [Git][BuildStream/buildstream][chandan/sourcetransform] Add pip source plugin

Title: GitLab

Chandan Singh pushed to branch chandan/sourcetransform at BuildStream / buildstream

Commits:

20 changed files:

Changes:

  • buildstream/_versions.py
    ... ... @@ -23,7 +23,7 @@
    23 23 
     # This version is bumped whenever enhancements are made
    24 24 
     # to the `project.conf` format or the core element format.
    25 25 
     #
    26 
    -BST_FORMAT_VERSION = 13
    26 
    +BST_FORMAT_VERSION = 14
    27 27
    28 28
    29 29 
     # The base BuildStream artifact version

  • buildstream/plugins/sources/pip.py
    1 
    +#
    2 
    +#  Copyright 2018 Bloomberg Finance LP
    3 
    +#
    4 
    +#  This program is free software; you can redistribute it and/or
    5 
    +#  modify it under the terms of the GNU Lesser General Public
    6 
    +#  License as published by the Free Software Foundation; either
    7 
    +#  version 2 of the License, or (at your option) any later version.
    8 
    +#
    9 
    +#  This library is distributed in the hope that it will be useful,
    10 
    +#  but WITHOUT ANY WARRANTY; without even the implied warranty of
    11 
    +#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    12 
    +#  Lesser General Public License for more details.
    13 
    +#
    14 
    +#  You should have received a copy of the GNU Lesser General Public
    15 
    +#  License along with this library. If not, see <http://www.gnu.org/licenses/>.
    16 
    +#
    17 
    +#  Authors:
    18 
    +#        Chandan Singh <csingh43 bloomberg net>
    19 
    +
    20 
    +"""
    21 
    +pip - stage python packages using pip
    22 
    +=====================================
    23 
    +
    24 
    +**Host depndencies:**
    25 
    +
    26 
    +  * ``pip`` python module
    27 
    +
    28 
    +This plugin will download source distributions for specified packages using
    29 
    +``pip`` but will not install them. It is expected that the elements using this
    30 
    +source will install the downloaded packages.
    31 
    +
    32 
    +**Usage:**
    33 
    +
    34 
    +.. code:: yaml
    35 
    +
    36 
    +   # Specify the pip source kind
    37 
    +   kind: pip
    38 
    +
    39 
    +   # Optionally specify index url, defaults to PyPi
    40 
    +   # This url is used to discover new versions of packages and download them
    41 
    +   # Projects intending to mirror their sources to a permanent location should
    42 
    +   # use an aliased url, and declare the alias in the project configuration
    43 
    +   url: https://mypypi.example.com/simple
    44 
    +
    45 
    +   # Optionally specify the path to requirements files
    46 
    +   # Note that either 'requirements-files' or 'packages' must be defined
    47 
    +   requirements-files:
    48 
    +   - requirements.txt
    49 
    +
    50 
    +   # Optionally specify a list of additional packages
    51 
    +   # Note that either 'requirements-files' or 'packages' must be defined
    52 
    +   packages:
    53 
    +   - flake8
    54 
    +
    55 
    +   # Optionally specify a relative staging directory
    56 
    +   directory: path/to/stage
    57 
    +
    58 
    +   # Specify the ref. It is a list of strings of format
    59 
    +   # "<package-name>==<version>", separated by "\\n".
    60 
    +   # Usually this will be contents of a requirements.txt file where all
    61 
    +   # package versions have been frozen.
    62 
    +   ref: "flake8==3.5.0\\nmccabe==0.6.1\\npkg-resources==0.0.0\\npycodestyle==2.3.1\\npyflakes==1.6.0"
    63 
    +
    64 
    +.. note::
    65 
    +
    66 
    +   The ``pip`` plugin is available since :ref:`format version 14 <project_format_version>`
    67 
    +
    68 
    +"""
    69 
    +
    70 
    +import errno
    71 
    +import hashlib
    72 
    +import os
    73 
    +import re
    74 
    +
    75 
    +from buildstream import Consistency, Source, SourceError, utils
    76 
    +
    77 
    +_PYPI_INDEX_URL = 'https://pypi.org/simple/'
    78 
    +
    79 
    +# Used only for finding pip command
    80 
    +_PYTHON_VERSIONS = [
    81 
    +    'python2.7',
    82 
    +    'python3.0',
    83 
    +    'python3.1',
    84 
    +    'python3.2',
    85 
    +    'python3.3',
    86 
    +    'python3.4',
    87 
    +    'python3.5',
    88 
    +    'python3.6',
    89 
    +    'python3.7',
    90 
    +]
    91 
    +
    92 
    +# List of allowed extensions taken from
    93 
    +# https://docs.python.org/3/distutils/sourcedist.html.
    94 
    +# Names of source distribution archives must be of the form
    95 
    +# '%{package-name}-%{version}.%{extension}'.
    96 
    +_SDIST_RE = re.compile(
    97 
    +    r'^([a-zA-Z0-9]+?)-(.+).(?:tar|tar.bz2|tar.gz|tar.xz|tar.Z|zip)$',
    98 
    +    re.IGNORECASE)
    99 
    +
    100 
    +
    101 
    +class PipSource(Source):
    102 
    +    # pylint: disable=attribute-defined-outside-init
    103 
    +
    104 
    +    # We need access to previous sources at track time to use requirements.txt
    105 
    +    # but not at fetch time as self.ref should contain sufficient information
    106 
    +    # for this plugin
    107 
    +    BST_REQUIRES_PREVIOUS_SOURCES_TRACK = True
    108 
    +
    109 
    +    def configure(self, node):
    110 
    +        self.node_validate(node, ['url', 'packages', 'ref', 'requirements-files'] +
    111 
    +                           Source.COMMON_CONFIG_KEYS)
    112 
    +        self.ref = self.node_get_member(node, str, 'ref', None)
    113 
    +        self.original_url = self.node_get_member(node, str, 'url', _PYPI_INDEX_URL)
    114 
    +        self.index_url = self.translate_url(self.original_url)
    115 
    +        self.packages = self.node_get_member(node, list, 'packages', [])
    116 
    +        self.requirements_files = self.node_get_member(node, list, 'requirements-files', [])
    117 
    +
    118 
    +        if not (self.packages or self.requirements_files):
    119 
    +            raise SourceError("{}: Either 'packages' or 'requirements-files' must be specified". format(self))
    120 
    +
    121 
    +    def preflight(self):
    122 
    +        # Try to find a pip version that supports download command
    123 
    +        self.host_pip = None
    124 
    +        for python in reversed(_PYTHON_VERSIONS):
    125 
    +            try:
    126 
    +                host_python = utils.get_host_tool(python)
    127 
    +                rc = self.call([host_python, '-m', 'pip', 'download', '--help'])
    128 
    +                if rc == 0:
    129 
    +                    self.host_pip = [host_python, '-m', 'pip']
    130 
    +                    break
    131 
    +            except utils.ProgramNotFoundError:
    132 
    +                pass
    133 
    +
    134 
    +        if self.host_pip is None:
    135 
    +            raise SourceError("{}: Unable to find a suitable pip command".format(self))
    136 
    +
    137 
    +    def get_unique_key(self):
    138 
    +        return [self.original_url, self.ref]
    139 
    +
    140 
    +    def get_consistency(self):
    141 
    +        if not self.ref:
    142 
    +            return Consistency.INCONSISTENT
    143 
    +        if os.path.exists(self._mirror) and os.listdir(self._mirror):
    144 
    +            return Consistency.CACHED
    145 
    +        return Consistency.RESOLVED
    146 
    +
    147 
    +    def get_ref(self):
    148 
    +        return self.ref
    149 
    +
    150 
    +    def load_ref(self, node):
    151 
    +        self.ref = self.node_get_member(node, str, 'ref', None)
    152 
    +
    153 
    +    def set_ref(self, ref, node):
    154 
    +        node['ref'] = self.ref = ref
    155 
    +
    156 
    +    def track(self, previous_sources_dir):
    157 
    +        # XXX pip does not offer any public API other than the CLI tool so it
    158 
    +        # is not feasible to correctly parse the requirements file or to check
    159 
    +        # which package versions pip is going to install.
    160 
    +        # See https://pip.pypa.io/en/stable/user_guide/#using-pip-from-your-program
    161 
    +        # for details.
    162 
    +        # As a result, we have to wastefully install the packages during track.
    163 
    +        with self.tempdir() as tmpdir:
    164 
    +            install_args = self.host_pip + ['download',
    165 
    +                                            '--no-binary', ':all:',
    166 
    +                                            '--index-url', self.index_url,
    167 
    +                                            '--dest', tmpdir]
    168 
    +            for requirement_file in self.requirements_files:
    169 
    +                fpath = os.path.join(previous_sources_dir, requirement_file)
    170 
    +                install_args += ['-r', fpath]
    171 
    +            install_args += self.packages
    172 
    +
    173 
    +            self.call(install_args, fail="Failed to install python packages")
    174 
    +            reqs = self._parse_sdist_names(tmpdir)
    175 
    +
    176 
    +        return '\n'.join(["{}=={}".format(pkg, ver) for pkg, ver in reqs])
    177 
    +
    178 
    +    def fetch(self):
    179 
    +        with self.tempdir() as tmpdir:
    180 
    +            packages = self.ref.strip().split('\n')
    181 
    +            package_dir = os.path.join(tmpdir, 'packages')
    182 
    +            os.makedirs(package_dir)
    183 
    +            self.call(self.host_pip + ['download',
    184 
    +                                       '--no-binary', ':all:',
    185 
    +                                       '--index-url', self.index_url,
    186 
    +                                       '--dest', package_dir
    187 
    +                                      ] + packages,
    188 
    +                      fail="Failed to install python packages: {}".format(packages))
    189 
    +
    190 
    +            # If the mirror directory already exists, assume that some other
    191 
    +            # process has fetched the sources before us and ensure that we do
    192 
    +            # not raise an error in that case.
    193 
    +            try:
    194 
    +                os.makedirs(self._mirror)
    195 
    +                os.rename(package_dir, self._mirror)
    196 
    +            except FileExistsError:
    197 
    +                return
    198 
    +            except OSError as e:
    199 
    +                if e.errno != errno.ENOTEMPTY:
    200 
    +                    raise
    201 
    +
    202 
    +    def stage(self, directory):
    203 
    +        with self.timed_activity("Staging Python packages", silent_nested=True):
    204 
    +            utils.copy_files(self._mirror, directory)
    205 
    +
    206 
    +    # Directory where this source should stage its files
    207 
    +    #
    208 
    +    @property
    209 
    +    def _mirror(self):
    210 
    +        if not self.ref:
    211 
    +            return None
    212 
    +        return os.path.join(self.get_mirror_directory(),
    213 
    +                            self.original_url,
    214 
    +                            hashlib.sha256(self.ref.encode()).hexdigest())
    215 
    +
    216 
    +    # Parse names of downloaded source distributions
    217 
    +    #
    218 
    +    # Args:
    219 
    +    #    basedir (str): Directory containing source distribution archives
    220 
    +    #
    221 
    +    # Returns:
    222 
    +    #    (list): List of (package_name, version) tuples in sorted order
    223 
    +    #
    224 
    +    def _parse_sdist_names(self, basedir):
    225 
    +        reqs = []
    226 
    +        for f in os.listdir(basedir):
    227 
    +            pkg_match = _SDIST_RE.match(f)
    228 
    +            if pkg_match:
    229 
    +                reqs.append(pkg_match.groups())
    230 
    +
    231 
    +        return sorted(reqs)
    232 
    +
    233 
    +
    234 
    +def setup():
    235 
    +    return PipSource

  • doc/source/core_plugins.rst
    ... ... @@ -58,6 +58,7 @@ Sources
    58 58 
        sources/ostree
    59 59 
        sources/patch
    60 60 
        sources/deb
    61 
    +   sources/pip
    61 62
    62 63
    63 64 
     External plugins

  • tests/cachekey/project/sources/pip1.bst
    1 
    +kind: import
    2 
    +
    3 
    +sources:
    4 
    +- kind: git
    5 
    +  url: https://example.com/foo/foobar.git
    6 
    +  ref: b99955530263172ed1beae52aed7a33885ef781f
    7 
    +- kind: pip
    8 
    +  url: https://pypi.example.com/simple
    9 
    +  packages:
    10 
    +  - horses
    11 
    +  - ponies
    12 
    +  ref: 'horses==0.0.1\nponies==0.0.2'

  • tests/cachekey/project/sources/pip1.expected
    1 
    +5143235f215d58a6ba5294da79ce8618040212991d259cc8a8260aebc6d449ab
    \ No newline at end of file

  • tests/cachekey/project/target.bst
    ... ... @@ -13,6 +13,7 @@ depends:
    13 13 
     - sources/patch1.bst
    14 14 
     - sources/patch2.bst
    15 15 
     - sources/patch3.bst
    16 
    +- sources/pip1.bst
    16 17 
     - sources/tar1.bst
    17 18 
     - sources/tar2.bst
    18 19 
     - sources/zip1.bst

  • tests/cachekey/project/target.expected
    1 
    -29c25f47cf186515a7adbec8a613a8ada9fc125b044299cddf1a372b8b4971b3
    \ No newline at end of file
    1 
    +95904425d6bd69c1cb174f16b3bd8db54f5d31292cd06f0a219b52eedd13df6c
    \ No newline at end of file

  • tests/integration/pip.py → tests/integration/pip_element.py

  • tests/integration/pip_source.py
    1 
    +import os
    2 
    +import pytest
    3 
    +
    4 
    +from buildstream import _yaml
    5 
    +
    6 
    +from tests.testutils import cli_integration as cli
    7 
    +from tests.testutils.integration import assert_contains
    8 
    +
    9 
    +
    10 
    +pytestmark = pytest.mark.integration
    11 
    +
    12 
    +
    13 
    +DATA_DIR = os.path.join(
    14 
    +    os.path.dirname(os.path.realpath(__file__)),
    15 
    +    "project"
    16 
    +)
    17 
    +
    18 
    +
    19 
    +@pytest.mark.datafiles(DATA_DIR)
    20 
    +def test_pip_source(cli, tmpdir, datafiles):
    21 
    +    project = os.path.join(datafiles.dirname, datafiles.basename)
    22 
    +    checkout = os.path.join(cli.directory, 'checkout')
    23 
    +    element_path = os.path.join(project, 'elements')
    24 
    +    element_name = 'pip/hello.bst'
    25 
    +
    26 
    +    element = {
    27 
    +        'kind': 'import',
    28 
    +        'sources': [
    29 
    +            {
    30 
    +                'kind': 'local',
    31 
    +                'path': 'files/pip-source'
    32 
    +            },
    33 
    +            {
    34 
    +                'kind': 'pip',
    35 
    +                'url': 'file://{}'.format(os.path.realpath(os.path.join(project, 'files', 'pypi-repo'))),
    36 
    +                'requirements-files': ['myreqs.txt'],
    37 
    +                'packages': ['app2']
    38 
    +            }
    39 
    +        ]
    40 
    +    }
    41 
    +    os.makedirs(os.path.dirname(os.path.join(element_path, element_name)), exist_ok=True)
    42 
    +    _yaml.dump(element, os.path.join(element_path, element_name))
    43 
    +
    44 
    +    result = cli.run(project=project, args=['track', element_name])
    45 
    +    assert result.exit_code == 0
    46 
    +
    47 
    +    result = cli.run(project=project, args=['build', element_name])
    48 
    +    assert result.exit_code == 0
    49 
    +
    50 
    +    result = cli.run(project=project, args=['checkout', element_name, checkout])
    51 
    +    assert result.exit_code == 0
    52 
    +
    53 
    +    assert_contains(checkout, ['/App1-0.1.tar.gz', '/App2-0.1.tar.gz'])

  • tests/integration/project/files/pip-source/myreqs.txt
    1 
    +app1

  • tests/integration/project/files/pypi-repo/app1/App1-0.1.tar.gz
    No preview for this file type
  • tests/integration/project/files/pypi-repo/app1/index.html
    1 
    +<html>
    2 
    +  <head>
    3 
    +    <title>Links for app1</title>
    4 
    +  </head>
    5 
    +  <body>
    6 
    +    <a href="">'App1-0.1.tar.gz'>App1-0.1.tar.gz</a><br />
    7 
    +  </body>
    8 
    +</html>

  • tests/integration/project/files/pypi-repo/app2/App2-0.1.tar.gz
    No preview for this file type
  • tests/integration/project/files/pypi-repo/app2/index.html
    1 
    +<html>
    2 
    +  <head>
    3 
    +    <title>Links for app1</title>
    4 
    +  </head>
    5 
    +  <body>
    6 
    +    <a href="">'App2-0.1.tar.gz'>App2-0.1.tar.gz</a><br />
    7 
    +  </body>
    8 
    +</html>

  • tests/sources/pip.py
    1 
    +import os
    2 
    +import pytest
    3 
    +
    4 
    +from buildstream._exceptions import ErrorDomain
    5 
    +from buildstream import _yaml
    6 
    +from tests.testutils import cli
    7 
    +
    8 
    +DATA_DIR = os.path.join(
    9 
    +    os.path.dirname(os.path.realpath(__file__)),
    10 
    +    'pip',
    11 
    +)
    12 
    +
    13 
    +
    14 
    +def generate_project(project_dir, tmpdir):
    15 
    +    project_file = os.path.join(project_dir, "project.conf")
    16 
    +    _yaml.dump({'name': 'foo'}, project_file)
    17 
    +
    18 
    +
    19 
    +# Test that without ref, consistency is set appropriately.
    20 
    +@pytest.mark.datafiles(os.path.join(DATA_DIR, 'no-ref'))
    21 
    +def test_no_ref(cli, tmpdir, datafiles):
    22 
    +    project = os.path.join(datafiles.dirname, datafiles.basename)
    23 
    +    generate_project(project, tmpdir)
    24 
    +    assert cli.get_element_state(project, 'target.bst') == 'no reference'
    25 
    +
    26 
    +
    27 
    +# Test that pip is not allowed to be the first source
    28 
    +@pytest.mark.datafiles(os.path.join(DATA_DIR, 'first-source-pip'))
    29 
    +def test_first_source(cli, tmpdir, datafiles):
    30 
    +    project = os.path.join(datafiles.dirname, datafiles.basename)
    31 
    +    generate_project(project, tmpdir)
    32 
    +    result = cli.run(project=project, args=[
    33 
    +        'show', 'target.bst'
    34 
    +    ])
    35 
    +    result.assert_main_error(ErrorDomain.ELEMENT, None)
    36 
    +
    37 
    +
    38 
    +# Test that error is raised when neither packges nor requirements files
    39 
    +# have been specified
    40 
    +@pytest.mark.datafiles(os.path.join(DATA_DIR, 'no-packages'))
    41 
    +def test_no_packages(cli, tmpdir, datafiles):
    42 
    +    project = os.path.join(datafiles.dirname, datafiles.basename)
    43 
    +    generate_project(project, tmpdir)
    44 
    +    result = cli.run(project=project, args=[
    45 
    +        'show', 'target.bst'
    46 
    +    ])
    47 
    +    result.assert_main_error(ErrorDomain.SOURCE, None)

  • tests/sources/pip/first-source-pip/target.bst
    1 
    +kind: import
    2 
    +description: pip should not be allowed to be the first source
    3 
    +sources:
    4 
    +- kind: pip
    5 
    +  packages:
    6 
    +  - flake8

  • tests/sources/pip/no-packages/file
    1 
    +Hello World!

  • tests/sources/pip/no-packages/target.bst
    1 
    +kind: import
    2 
    +description: The kind of this element is irrelevant.
    3 
    +sources:
    4 
    +- kind: local
    5 
    +  path: file
    6 
    +- kind: pip

  • tests/sources/pip/no-ref/file
    1 
    +Hello World!

  • tests/sources/pip/no-ref/target.bst
    1 
    +kind: import
    2 
    +description: The kind of this element is irrelevant.
    3 
    +sources:
    4 
    +- kind: local
    5 
    +  path: file
    6 
    +- kind: pip
    7 
    +  packages:
    8 
    +  - flake8

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