Merge pull request #63 from brenda-br/Fix-35HEADmaster

Restructure Project and Deployment

8 files changed, 0 insertions, 815 deletions

diff --git a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__init__.py b/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__init__.py
deleted file mode 100644
index e69de29..0000000
--- a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__init__.py
+++ /dev/null
diff --git a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__pycache__/__init__.cpython-37.pyc b/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__pycache__/__init__.cpython-37.pyc
deleted file mode 100644
index 07a1eb7..0000000
--- a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__pycache__/__init__.cpython-37.pyc
+++ /dev/null
diff --git a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__pycache__/check.cpython-37.pyc b/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__pycache__/check.cpython-37.pyc
deleted file mode 100644
index a85fd1b..0000000
--- a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__pycache__/check.cpython-37.pyc
+++ /dev/null
diff --git a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__pycache__/freeze.cpython-37.pyc b/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__pycache__/freeze.cpython-37.pyc
deleted file mode 100644
index 7d8bed4..0000000
--- a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__pycache__/freeze.cpython-37.pyc
+++ /dev/null
diff --git a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__pycache__/prepare.cpython-37.pyc b/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__pycache__/prepare.cpython-37.pyc
deleted file mode 100644
index 952f933..0000000
--- a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/__pycache__/prepare.cpython-37.pyc
+++ /dev/null
diff --git a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/check.py b/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/check.py
deleted file mode 100644
index 0b56eda..0000000
--- a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/check.py
+++ /dev/null
@@ -1,155 +0,0 @@
-"""Validation of dependencies of packages
-"""
-
-import logging
-from collections import namedtuple
-
-from pip._vendor.packaging.utils import canonicalize_name
-from pip._vendor.pkg_resources import RequirementParseError
-
-from pip._internal.operations.prepare import make_abstract_dist
-from pip._internal.utils.misc import get_installed_distributions
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-logger = logging.getLogger(__name__)
-
-if MYPY_CHECK_RUNNING:
-    from pip._internal.req.req_install import InstallRequirement  # noqa: F401
-    from typing import (  # noqa: F401
-        Any, Callable, Dict, Optional, Set, Tuple, List
-    )
-
-    # Shorthands
-    PackageSet = Dict[str, 'PackageDetails']
-    Missing = Tuple[str, Any]
-    Conflicting = Tuple[str, str, Any]
-
-    MissingDict = Dict[str, List[Missing]]
-    ConflictingDict = Dict[str, List[Conflicting]]
-    CheckResult = Tuple[MissingDict, ConflictingDict]
-
-PackageDetails = namedtuple('PackageDetails', ['version', 'requires'])
-
-
-def create_package_set_from_installed(**kwargs):
-    # type: (**Any) -> Tuple[PackageSet, bool]
-    """Converts a list of distributions into a PackageSet.
-    """
-    # Default to using all packages installed on the system
-    if kwargs == {}:
-        kwargs = {"local_only": False, "skip": ()}
-
-    package_set = {}
-    problems = False
-    for dist in get_installed_distributions(**kwargs):
-        name = canonicalize_name(dist.project_name)
-        try:
-            package_set[name] = PackageDetails(dist.version, dist.requires())
-        except RequirementParseError as e:
-            # Don't crash on broken metadata
-            logging.warning("Error parsing requirements for %s: %s", name, e)
-            problems = True
-    return package_set, problems
-
-
-def check_package_set(package_set, should_ignore=None):
-    # type: (PackageSet, Optional[Callable[[str], bool]]) -> CheckResult
-    """Check if a package set is consistent
-
-    If should_ignore is passed, it should be a callable that takes a
-    package name and returns a boolean.
-    """
-    if should_ignore is None:
-        def should_ignore(name):
-            return False
-
-    missing = dict()
-    conflicting = dict()
-
-    for package_name in package_set:
-        # Info about dependencies of package_name
-        missing_deps = set()  # type: Set[Missing]
-        conflicting_deps = set()  # type: Set[Conflicting]
-
-        if should_ignore(package_name):
-            continue
-
-        for req in package_set[package_name].requires:
-            name = canonicalize_name(req.project_name)  # type: str
-
-            # Check if it's missing
-            if name not in package_set:
-                missed = True
-                if req.marker is not None:
-                    missed = req.marker.evaluate()
-                if missed:
-                    missing_deps.add((name, req))
-                continue
-
-            # Check if there's a conflict
-            version = package_set[name].version  # type: str
-            if not req.specifier.contains(version, prereleases=True):
-                conflicting_deps.add((name, version, req))
-
-        if missing_deps:
-            missing[package_name] = sorted(missing_deps, key=str)
-        if conflicting_deps:
-            conflicting[package_name] = sorted(conflicting_deps, key=str)
-
-    return missing, conflicting
-
-
-def check_install_conflicts(to_install):
-    # type: (List[InstallRequirement]) -> Tuple[PackageSet, CheckResult]
-    """For checking if the dependency graph would be consistent after \
-    installing given requirements
-    """
-    # Start from the current state
-    package_set, _ = create_package_set_from_installed()
-    # Install packages
-    would_be_installed = _simulate_installation_of(to_install, package_set)
-
-    # Only warn about directly-dependent packages; create a whitelist of them
-    whitelist = _create_whitelist(would_be_installed, package_set)
-
-    return (
-        package_set,
-        check_package_set(
-            package_set, should_ignore=lambda name: name not in whitelist
-        )
-    )
-
-
-def _simulate_installation_of(to_install, package_set):
-    # type: (List[InstallRequirement], PackageSet) -> Set[str]
-    """Computes the version of packages after installing to_install.
-    """
-
-    # Keep track of packages that were installed
-    installed = set()
-
-    # Modify it as installing requirement_set would (assuming no errors)
-    for inst_req in to_install:
-        dist = make_abstract_dist(inst_req).dist()
-        name = canonicalize_name(dist.key)
-        package_set[name] = PackageDetails(dist.version, dist.requires())
-
-        installed.add(name)
-
-    return installed
-
-
-def _create_whitelist(would_be_installed, package_set):
-    # type: (Set[str], PackageSet) -> Set[str]
-    packages_affected = set(would_be_installed)
-
-    for package_name in package_set:
-        if package_name in packages_affected:
-            continue
-
-        for req in package_set[package_name].requires:
-            if canonicalize_name(req.name) in packages_affected:
-                packages_affected.add(package_name)
-                break
-
-    return packages_affected
diff --git a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/freeze.py b/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/freeze.py
deleted file mode 100644
index 388bb73..0000000
--- a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/freeze.py
+++ /dev/null
@@ -1,247 +0,0 @@
-from __future__ import absolute_import
-
-import collections
-import logging
-import os
-import re
-
-from pip._vendor import six
-from pip._vendor.packaging.utils import canonicalize_name
-from pip._vendor.pkg_resources import RequirementParseError
-
-from pip._internal.exceptions import BadCommand, InstallationError
-from pip._internal.req.constructors import (
-    install_req_from_editable, install_req_from_line,
-)
-from pip._internal.req.req_file import COMMENT_RE
-from pip._internal.utils.misc import (
-    dist_is_editable, get_installed_distributions,
-)
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import (  # noqa: F401
-        Iterator, Optional, List, Container, Set, Dict, Tuple, Iterable, Union
-    )
-    from pip._internal.cache import WheelCache  # noqa: F401
-    from pip._vendor.pkg_resources import (  # noqa: F401
-        Distribution, Requirement
-    )
-
-    RequirementInfo = Tuple[Optional[Union[str, Requirement]], bool, List[str]]
-
-
-logger = logging.getLogger(__name__)
-
-
-def freeze(
-    requirement=None,  # type: Optional[List[str]]
-    find_links=None,  # type: Optional[List[str]]
-    local_only=None,  # type: Optional[bool]
-    user_only=None,  # type: Optional[bool]
-    skip_regex=None,  # type: Optional[str]
-    isolated=False,  # type: bool
-    wheel_cache=None,  # type: Optional[WheelCache]
-    exclude_editable=False,  # type: bool
-    skip=()  # type: Container[str]
-):
-    # type: (...) -> Iterator[str]
-    find_links = find_links or []
-    skip_match = None
-
-    if skip_regex:
-        skip_match = re.compile(skip_regex).search
-
-    for link in find_links:
-        yield '-f %s' % link
-    installations = {}  # type: Dict[str, FrozenRequirement]
-    for dist in get_installed_distributions(local_only=local_only,
-                                            skip=(),
-                                            user_only=user_only):
-        try:
-            req = FrozenRequirement.from_dist(dist)
-        except RequirementParseError:
-            logger.warning(
-                "Could not parse requirement: %s",
-                dist.project_name
-            )
-            continue
-        if exclude_editable and req.editable:
-            continue
-        installations[req.name] = req
-
-    if requirement:
-        # the options that don't get turned into an InstallRequirement
-        # should only be emitted once, even if the same option is in multiple
-        # requirements files, so we need to keep track of what has been emitted
-        # so that we don't emit it again if it's seen again
-        emitted_options = set()  # type: Set[str]
-        # keep track of which files a requirement is in so that we can
-        # give an accurate warning if a requirement appears multiple times.
-        req_files = collections.defaultdict(list)  # type: Dict[str, List[str]]
-        for req_file_path in requirement:
-            with open(req_file_path) as req_file:
-                for line in req_file:
-                    if (not line.strip() or
-                            line.strip().startswith('#') or
-                            (skip_match and skip_match(line)) or
-                            line.startswith((
-                                '-r', '--requirement',
-                                '-Z', '--always-unzip',
-                                '-f', '--find-links',
-                                '-i', '--index-url',
-                                '--pre',
-                                '--trusted-host',
-                                '--process-dependency-links',
-                                '--extra-index-url'))):
-                        line = line.rstrip()
-                        if line not in emitted_options:
-                            emitted_options.add(line)
-                            yield line
-                        continue
-
-                    if line.startswith('-e') or line.startswith('--editable'):
-                        if line.startswith('-e'):
-                            line = line[2:].strip()
-                        else:
-                            line = line[len('--editable'):].strip().lstrip('=')
-                        line_req = install_req_from_editable(
-                            line,
-                            isolated=isolated,
-                            wheel_cache=wheel_cache,
-                        )
-                    else:
-                        line_req = install_req_from_line(
-                            COMMENT_RE.sub('', line).strip(),
-                            isolated=isolated,
-                            wheel_cache=wheel_cache,
-                        )
-
-                    if not line_req.name:
-                        logger.info(
-                            "Skipping line in requirement file [%s] because "
-                            "it's not clear what it would install: %s",
-                            req_file_path, line.strip(),
-                        )
-                        logger.info(
-                            "  (add #egg=PackageName to the URL to avoid"
-                            " this warning)"
-                        )
-                    elif line_req.name not in installations:
-                        # either it's not installed, or it is installed
-                        # but has been processed already
-                        if not req_files[line_req.name]:
-                            logger.warning(
-                                "Requirement file [%s] contains %s, but "
-                                "package %r is not installed",
-                                req_file_path,
-                                COMMENT_RE.sub('', line).strip(), line_req.name
-                            )
-                        else:
-                            req_files[line_req.name].append(req_file_path)
-                    else:
-                        yield str(installations[line_req.name]).rstrip()
-                        del installations[line_req.name]
-                        req_files[line_req.name].append(req_file_path)
-
-        # Warn about requirements that were included multiple times (in a
-        # single requirements file or in different requirements files).
-        for name, files in six.iteritems(req_files):
-            if len(files) > 1:
-                logger.warning("Requirement %s included multiple times [%s]",
-                               name, ', '.join(sorted(set(files))))
-
-        yield(
-            '## The following requirements were added by '
-            'pip freeze:'
-        )
-    for installation in sorted(
-            installations.values(), key=lambda x: x.name.lower()):
-        if canonicalize_name(installation.name) not in skip:
-            yield str(installation).rstrip()
-
-
-def get_requirement_info(dist):
-    # type: (Distribution) -> RequirementInfo
-    """
-    Compute and return values (req, editable, comments) for use in
-    FrozenRequirement.from_dist().
-    """
-    if not dist_is_editable(dist):
-        return (None, False, [])
-
-    location = os.path.normcase(os.path.abspath(dist.location))
-
-    from pip._internal.vcs import vcs, RemoteNotFoundError
-    vc_type = vcs.get_backend_type(location)
-
-    if not vc_type:
-        req = dist.as_requirement()
-        logger.debug(
-            'No VCS found for editable requirement {!r} in: {!r}', req,
-            location,
-        )
-        comments = [
-            '# Editable install with no version control ({})'.format(req)
-        ]
-        return (location, True, comments)
-
-    try:
-        req = vc_type.get_src_requirement(location, dist.project_name)
-    except RemoteNotFoundError:
-        req = dist.as_requirement()
-        comments = [
-            '# Editable {} install with no remote ({})'.format(
-                vc_type.__name__, req,
-            )
-        ]
-        return (location, True, comments)
-
-    except BadCommand:
-        logger.warning(
-            'cannot determine version of editable source in %s '
-            '(%s command not found in path)',
-            location,
-            vc_type.name,
-        )
-        return (None, True, [])
-
-    except InstallationError as exc:
-        logger.warning(
-            "Error when trying to get requirement for VCS system %s, "
-            "falling back to uneditable format", exc
-        )
-    else:
-        if req is not None:
-            return (req, True, [])
-
-    logger.warning(
-        'Could not determine repository location of %s', location
-    )
-    comments = ['## !! Could not determine repository location']
-
-    return (None, False, comments)
-
-
-class FrozenRequirement(object):
-    def __init__(self, name, req, editable, comments=()):
-        # type: (str, Union[str, Requirement], bool, Iterable[str]) -> None
-        self.name = name
-        self.req = req
-        self.editable = editable
-        self.comments = comments
-
-    @classmethod
-    def from_dist(cls, dist):
-        # type: (Distribution) -> FrozenRequirement
-        req, editable, comments = get_requirement_info(dist)
-        if req is None:
-            req = dist.as_requirement()
-
-        return cls(dist.project_name, req, editable, comments=comments)
-
-    def __str__(self):
-        req = self.req
-        if self.editable:
-            req = '-e %s' % req
-        return '\n'.join(list(self.comments) + [str(req)]) + '\n'
diff --git a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/prepare.py b/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/prepare.py
deleted file mode 100644
index 4f31dd5..0000000
--- a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_internal/operations/prepare.py
+++ /dev/null
@@ -1,413 +0,0 @@
-"""Prepares a distribution for installation
-"""
-
-import logging
-import os
-
-from pip._vendor import pkg_resources, requests
-
-from pip._internal.build_env import BuildEnvironment
-from pip._internal.download import (
-    is_dir_url, is_file_url, is_vcs_url, unpack_url, url_to_path,
-)
-from pip._internal.exceptions import (
-    DirectoryUrlHashUnsupported, HashUnpinned, InstallationError,
-    PreviousBuildDirError, VcsHashUnsupported,
-)
-from pip._internal.utils.compat import expanduser
-from pip._internal.utils.hashes import MissingHashes
-from pip._internal.utils.logging import indent_log
-from pip._internal.utils.misc import display_path, normalize_path
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.vcs import vcs
-
-if MYPY_CHECK_RUNNING:
-    from typing import Any, Optional  # noqa: F401
-    from pip._internal.req.req_install import InstallRequirement  # noqa: F401
-    from pip._internal.index import PackageFinder  # noqa: F401
-    from pip._internal.download import PipSession  # noqa: F401
-    from pip._internal.req.req_tracker import RequirementTracker  # noqa: F401
-
-logger = logging.getLogger(__name__)
-
-
-def make_abstract_dist(req):
-    # type: (InstallRequirement) -> DistAbstraction
-    """Factory to make an abstract dist object.
-
-    Preconditions: Either an editable req with a source_dir, or satisfied_by or
-    a wheel link, or a non-editable req with a source_dir.
-
-    :return: A concrete DistAbstraction.
-    """
-    if req.editable:
-        return IsSDist(req)
-    elif req.link and req.link.is_wheel:
-        return IsWheel(req)
-    else:
-        return IsSDist(req)
-
-
-class DistAbstraction(object):
-    """Abstracts out the wheel vs non-wheel Resolver.resolve() logic.
-
-    The requirements for anything installable are as follows:
-     - we must be able to determine the requirement name
-       (or we can't correctly handle the non-upgrade case).
-     - we must be able to generate a list of run-time dependencies
-       without installing any additional packages (or we would
-       have to either burn time by doing temporary isolated installs
-       or alternatively violate pips 'don't start installing unless
-       all requirements are available' rule - neither of which are
-       desirable).
-     - for packages with setup requirements, we must also be able
-       to determine their requirements without installing additional
-       packages (for the same reason as run-time dependencies)
-     - we must be able to create a Distribution object exposing the
-       above metadata.
-    """
-
-    def __init__(self, req):
-        # type: (InstallRequirement) -> None
-        self.req = req  # type: InstallRequirement
-
-    def dist(self):
-        # type: () -> Any
-        """Return a setuptools Dist object."""
-        raise NotImplementedError
-
-    def prep_for_dist(self, finder, build_isolation):
-        # type: (PackageFinder, bool) -> Any
-        """Ensure that we can get a Dist for this requirement."""
-        raise NotImplementedError
-
-
-class IsWheel(DistAbstraction):
-
-    def dist(self):
-        # type: () -> pkg_resources.Distribution
-        return list(pkg_resources.find_distributions(
-            self.req.source_dir))[0]
-
-    def prep_for_dist(self, finder, build_isolation):
-        # type: (PackageFinder, bool) -> Any
-        # FIXME:https://github.com/pypa/pip/issues/1112
-        pass
-
-
-class IsSDist(DistAbstraction):
-
-    def dist(self):
-        return self.req.get_dist()
-
-    def prep_for_dist(self, finder, build_isolation):
-        # type: (PackageFinder, bool) -> None
-        # Prepare for building. We need to:
-        #   1. Load pyproject.toml (if it exists)
-        #   2. Set up the build environment
-
-        self.req.load_pyproject_toml()
-        should_isolate = self.req.use_pep517 and build_isolation
-
-        def _raise_conflicts(conflicting_with, conflicting_reqs):
-            raise InstallationError(
-                "Some build dependencies for %s conflict with %s: %s." % (
-                    self.req, conflicting_with, ', '.join(
-                        '%s is incompatible with %s' % (installed, wanted)
-                        for installed, wanted in sorted(conflicting))))
-
-        if should_isolate:
-            # Isolate in a BuildEnvironment and install the build-time
-            # requirements.
-            self.req.build_env = BuildEnvironment()
-            self.req.build_env.install_requirements(
-                finder, self.req.pyproject_requires, 'overlay',
-                "Installing build dependencies"
-            )
-            conflicting, missing = self.req.build_env.check_requirements(
-                self.req.requirements_to_check
-            )
-            if conflicting:
-                _raise_conflicts("PEP 517/518 supported requirements",
-                                 conflicting)
-            if missing:
-                logger.warning(
-                    "Missing build requirements in pyproject.toml for %s.",
-                    self.req,
-                )
-                logger.warning(
-                    "The project does not specify a build backend, and "
-                    "pip cannot fall back to setuptools without %s.",
-                    " and ".join(map(repr, sorted(missing)))
-                )
-            # Install any extra build dependencies that the backend requests.
-            # This must be done in a second pass, as the pyproject.toml
-            # dependencies must be installed before we can call the backend.
-            with self.req.build_env:
-                # We need to have the env active when calling the hook.
-                self.req.spin_message = "Getting requirements to build wheel"
-                reqs = self.req.pep517_backend.get_requires_for_build_wheel()
-            conflicting, missing = self.req.build_env.check_requirements(reqs)
-            if conflicting:
-                _raise_conflicts("the backend dependencies", conflicting)
-            self.req.build_env.install_requirements(
-                finder, missing, 'normal',
-                "Installing backend dependencies"
-            )
-
-        self.req.prepare_metadata()
-        self.req.assert_source_matches_version()
-
-
-class Installed(DistAbstraction):
-
-    def dist(self):
-        # type: () -> pkg_resources.Distribution
-        return self.req.satisfied_by
-
-    def prep_for_dist(self, finder, build_isolation):
-        # type: (PackageFinder, bool) -> Any
-        pass
-
-
-class RequirementPreparer(object):
-    """Prepares a Requirement
-    """
-
-    def __init__(
-        self,
-        build_dir,  # type: str
-        download_dir,  # type: Optional[str]
-        src_dir,  # type: str
-        wheel_download_dir,  # type: Optional[str]
-        progress_bar,  # type: str
-        build_isolation,  # type: bool
-        req_tracker  # type: RequirementTracker
-    ):
-        # type: (...) -> None
-        super(RequirementPreparer, self).__init__()
-
-        self.src_dir = src_dir
-        self.build_dir = build_dir
-        self.req_tracker = req_tracker
-
-        # Where still packed archives should be written to. If None, they are
-        # not saved, and are deleted immediately after unpacking.
-        self.download_dir = download_dir
-
-        # Where still-packed .whl files should be written to. If None, they are
-        # written to the download_dir parameter. Separate to download_dir to
-        # permit only keeping wheel archives for pip wheel.
-        if wheel_download_dir:
-            wheel_download_dir = normalize_path(wheel_download_dir)
-        self.wheel_download_dir = wheel_download_dir
-
-        # NOTE
-        # download_dir and wheel_download_dir overlap semantically and may
-        # be combined if we're willing to have non-wheel archives present in
-        # the wheelhouse output by 'pip wheel'.
-
-        self.progress_bar = progress_bar
-
-        # Is build isolation allowed?
-        self.build_isolation = build_isolation
-
-    @property
-    def _download_should_save(self):
-        # type: () -> bool
-        # TODO: Modify to reduce indentation needed
-        if self.download_dir:
-            self.download_dir = expanduser(self.download_dir)
-            if os.path.exists(self.download_dir):
-                return True
-            else:
-                logger.critical('Could not find download directory')
-                raise InstallationError(
-                    "Could not find or access download directory '%s'"
-                    % display_path(self.download_dir))
-        return False
-
-    def prepare_linked_requirement(
-        self,
-        req,  # type: InstallRequirement
-        session,  # type: PipSession
-        finder,  # type: PackageFinder
-        upgrade_allowed,  # type: bool
-        require_hashes  # type: bool
-    ):
-        # type: (...) -> DistAbstraction
-        """Prepare a requirement that would be obtained from req.link
-        """
-        # TODO: Breakup into smaller functions
-        if req.link and req.link.scheme == 'file':
-            path = url_to_path(req.link.url)
-            logger.info('Processing %s', display_path(path))
-        else:
-            logger.info('Collecting %s', req)
-
-        with indent_log():
-            # @@ if filesystem packages are not marked
-            # editable in a req, a non deterministic error
-            # occurs when the script attempts to unpack the
-            # build directory
-            req.ensure_has_source_dir(self.build_dir)
-            # If a checkout exists, it's unwise to keep going.  version
-            # inconsistencies are logged later, but do not fail the
-            # installation.
-            # FIXME: this won't upgrade when there's an existing
-            # package unpacked in `req.source_dir`
-            # package unpacked in `req.source_dir`
-            if os.path.exists(os.path.join(req.source_dir, 'setup.py')):
-                raise PreviousBuildDirError(
-                    "pip can't proceed with requirements '%s' due to a"
-                    " pre-existing build directory (%s). This is "
-                    "likely due to a previous installation that failed"
-                    ". pip is being responsible and not assuming it "
-                    "can delete this. Please delete it and try again."
-                    % (req, req.source_dir)
-                )
-            req.populate_link(finder, upgrade_allowed, require_hashes)
-
-            # We can't hit this spot and have populate_link return None.
-            # req.satisfied_by is None here (because we're
-            # guarded) and upgrade has no impact except when satisfied_by
-            # is not None.
-            # Then inside find_requirement existing_applicable -> False
-            # If no new versions are found, DistributionNotFound is raised,
-            # otherwise a result is guaranteed.
-            assert req.link
-            link = req.link
-
-            # Now that we have the real link, we can tell what kind of
-            # requirements we have and raise some more informative errors
-            # than otherwise. (For example, we can raise VcsHashUnsupported
-            # for a VCS URL rather than HashMissing.)
-            if require_hashes:
-                # We could check these first 2 conditions inside
-                # unpack_url and save repetition of conditions, but then
-                # we would report less-useful error messages for
-                # unhashable requirements, complaining that there's no
-                # hash provided.
-                if is_vcs_url(link):
-                    raise VcsHashUnsupported()
-                elif is_file_url(link) and is_dir_url(link):
-                    raise DirectoryUrlHashUnsupported()
-                if not req.original_link and not req.is_pinned:
-                    # Unpinned packages are asking for trouble when a new
-                    # version is uploaded. This isn't a security check, but
-                    # it saves users a surprising hash mismatch in the
-                    # future.
-                    #
-                    # file:/// URLs aren't pinnable, so don't complain
-                    # about them not being pinned.
-                    raise HashUnpinned()
-
-            hashes = req.hashes(trust_internet=not require_hashes)
-            if require_hashes and not hashes:
-                # Known-good hashes are missing for this requirement, so
-                # shim it with a facade object that will provoke hash
-                # computation and then raise a HashMissing exception
-                # showing the user what the hash should be.
-                hashes = MissingHashes()
-
-            try:
-                download_dir = self.download_dir
-                # We always delete unpacked sdists after pip ran.
-                autodelete_unpacked = True
-                if req.link.is_wheel and self.wheel_download_dir:
-                    # when doing 'pip wheel` we download wheels to a
-                    # dedicated dir.
-                    download_dir = self.wheel_download_dir
-                if req.link.is_wheel:
-                    if download_dir:
-                        # When downloading, we only unpack wheels to get
-                        # metadata.
-                        autodelete_unpacked = True
-                    else:
-                        # When installing a wheel, we use the unpacked
-                        # wheel.
-                        autodelete_unpacked = False
-                unpack_url(
-                    req.link, req.source_dir,
-                    download_dir, autodelete_unpacked,
-                    session=session, hashes=hashes,
-                    progress_bar=self.progress_bar
-                )
-            except requests.HTTPError as exc:
-                logger.critical(
-                    'Could not install requirement %s because of error %s',
-                    req,
-                    exc,
-                )
-                raise InstallationError(
-                    'Could not install requirement %s because of HTTP '
-                    'error %s for URL %s' %
-                    (req, exc, req.link)
-                )
-            abstract_dist = make_abstract_dist(req)
-            with self.req_tracker.track(req):
-                abstract_dist.prep_for_dist(finder, self.build_isolation)
-            if self._download_should_save:
-                # Make a .zip of the source_dir we already created.
-                if req.link.scheme in vcs.all_schemes:
-                    req.archive(self.download_dir)
-        return abstract_dist
-
-    def prepare_editable_requirement(
-        self,
-        req,  # type: InstallRequirement
-        require_hashes,  # type: bool
-        use_user_site,  # type: bool
-        finder  # type: PackageFinder
-    ):
-        # type: (...) -> DistAbstraction
-        """Prepare an editable requirement
-        """
-        assert req.editable, "cannot prepare a non-editable req as editable"
-
-        logger.info('Obtaining %s', req)
-
-        with indent_log():
-            if require_hashes:
-                raise InstallationError(
-                    'The editable requirement %s cannot be installed when '
-                    'requiring hashes, because there is no single file to '
-                    'hash.' % req
-                )
-            req.ensure_has_source_dir(self.src_dir)
-            req.update_editable(not self._download_should_save)
-
-            abstract_dist = make_abstract_dist(req)
-            with self.req_tracker.track(req):
-                abstract_dist.prep_for_dist(finder, self.build_isolation)
-
-            if self._download_should_save:
-                req.archive(self.download_dir)
-            req.check_if_exists(use_user_site)
-
-        return abstract_dist
-
-    def prepare_installed_requirement(self, req, require_hashes, skip_reason):
-        # type: (InstallRequirement, bool, Optional[str]) -> DistAbstraction
-        """Prepare an already-installed requirement
-        """
-        assert req.satisfied_by, "req should have been satisfied but isn't"
-        assert skip_reason is not None, (
-            "did not get skip reason skipped but req.satisfied_by "
-            "is set to %r" % (req.satisfied_by,)
-        )
-        logger.info(
-            'Requirement %s: %s (%s)',
-            skip_reason, req, req.satisfied_by.version
-        )
-        with indent_log():
-            if require_hashes:
-                logger.debug(
-                    'Since it is already installed, we are trusting this '
-                    'package without checking its hash. To ensure a '
-                    'completely repeatable environment, install into an '
-                    'empty virtualenv.'
-                )
-            abstract_dist = Installed(req)
-
-        return abstract_dist