Exemplo n.º 1
0
    def _prepare_linked_requirement(self, req, resolver):
        """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(resolver.finder,
                              resolver._is_upgrade_allowed(req),
                              resolver.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 resolver.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 resolver.require_hashes)
            if resolver.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=resolver.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)
            abstract_dist.prep_for_dist()
            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)
            # req.req is only avail after unpack for URL
            # pkgs repeat check_if_exists to uninstall-on-upgrade
            # (#14)
            if not resolver.ignore_installed:
                req.check_if_exists()
            if req.satisfied_by:
                should_modify = (resolver.upgrade_strategy != "to-satisfy-only"
                                 or resolver.ignore_installed)
                if should_modify:
                    resolver._set_req_to_reinstall(req)
                else:
                    logger.info(
                        'Requirement already satisfied (use '
                        '--upgrade to upgrade): %s',
                        req,
                    )
        return abstract_dist
Exemplo n.º 2
0
    def _prepare_file(self,
                      finder,
                      req_to_install,
                      require_hashes=False,
                      ignore_dependencies=False):
        """Prepare a single requirements file.

        :return: A list of additional InstallRequirements to also install.
        """
        # Tell user what we are doing for this requirement:
        # obtain (editable), skipping, processing (local url), collecting
        # (remote url or package name)
        if req_to_install.constraint or req_to_install.prepared:
            return []

        req_to_install.prepared = True

        # ###################### #
        # # print log messages # #
        # ###################### #
        if req_to_install.editable:
            logger.info('Obtaining %s', req_to_install)
        else:
            # satisfied_by is only evaluated by calling _check_skip_installed,
            # so it must be None here.
            assert req_to_install.satisfied_by is None
            if not self.ignore_installed:
                skip_reason = self._check_skip_installed(
                    req_to_install, finder)

            if req_to_install.satisfied_by:
                assert skip_reason is not None, (
                    '_check_skip_installed returned None but '
                    'req_to_install.satisfied_by is set to %r'
                    % (req_to_install.satisfied_by,))
                logger.info(
                    'Requirement %s: %s (%s)', skip_reason,
                    req_to_install,
                    req_to_install.satisfied_by.version)
            else:
                if (req_to_install.link and
                        req_to_install.link.scheme == 'file'):
                    path = url_to_path(req_to_install.link.url)
                    logger.info('Processing %s', display_path(path))
                else:
                    logger.info('Collecting %s', req_to_install)

        with indent_log():
            # ################################ #
            # # vcs update or unpack archive # #
            # ################################ #
            if req_to_install.editable:
                if require_hashes:
                    raise InstallationError(
                        'The editable requirement %s cannot be installed when '
                        'requiring hashes, because there is no single file to '
                        'hash.' % req_to_install)
                req_to_install.ensure_has_source_dir(self.src_dir)
                req_to_install.update_editable(not self.is_download)
                abstract_dist = make_abstract_dist(req_to_install)
                abstract_dist.prep_for_dist()
                if self.is_download:
                    req_to_install.archive(self.download_dir)
                req_to_install.check_if_exists()
                in_toto_verify_wrapper(req_to_install.source_dir, toto_verify=self.toto_verify, toto_default=self.toto_default)
            elif req_to_install.satisfied_by:
                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_to_install)
            else:
                # @@ 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_to_install.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_to_install.source_dir`
                if os.path.exists(
                        os.path.join(req_to_install.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_to_install, req_to_install.source_dir)
                    )
                req_to_install.populate_link(
                    finder,
                    self._is_upgrade_allowed(req_to_install),
                    require_hashes
                )
                # We can't hit this spot and have populate_link return None.
                # req_to_install.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_to_install.link
                link = req_to_install.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_to_install.original_link and
                            not req_to_install.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_to_install.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_to_install.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_to_install.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
                    #print "req.source_dir: %s, req_to_install.link: %s, download_dir: %s" % (req_to_install.source_dir, req_to_install.link, download_dir)
                    unpack_url(
                        req_to_install.link, req_to_install.source_dir,
                        download_dir, autodelete_unpacked,
                        session=self.session, hashes=hashes, toto_verify=self.toto_verify, toto_default=self.toto_default)


                except requests.HTTPError as exc:
                    logger.critical(
                        'Could not install requirement %s because '
                        'of error %s',
                        req_to_install,
                        exc,
                    )
                    raise InstallationError(
                        'Could not install requirement %s because '
                        'of HTTP error %s for URL %s' %
                        (req_to_install, exc, req_to_install.link)
                    )
                abstract_dist = make_abstract_dist(req_to_install)
                abstract_dist.prep_for_dist()
                if self.is_download:
                    # Make a .zip of the source_dir we already created.
                    if req_to_install.link.scheme in vcs.all_schemes:
                        req_to_install.archive(self.download_dir)
                # req_to_install.req is only avail after unpack for URL
                # pkgs repeat check_if_exists to uninstall-on-upgrade
                # (#14)
                if not self.ignore_installed:
                    req_to_install.check_if_exists()
                if req_to_install.satisfied_by:
                    if self.upgrade or self.ignore_installed:
                        # don't uninstall conflict if user install and
                        # conflict is not user install
                        if not (self.use_user_site and not
                                dist_in_usersite(
                                    req_to_install.satisfied_by)):
                            req_to_install.conflicts_with = \
                                req_to_install.satisfied_by
                        req_to_install.satisfied_by = None
                    else:
                        logger.info(
                            'Requirement already satisfied (use '
                            '--upgrade to upgrade): %s',
                            req_to_install,
                        )

            # ###################### #
            # # parse dependencies # #
            # ###################### #
            dist = abstract_dist.dist(finder)
            try:
                check_dist_requires_python(dist)
            except UnsupportedPythonVersion as e:
                if self.ignore_requires_python:
                    logger.warning(e.args[0])
                else:
                    req_to_install.remove_temporary_source()
                    raise
            more_reqs = []

            def add_req(subreq, extras_requested):
                sub_install_req = InstallRequirement(
                    str(subreq),
                    req_to_install,
                    isolated=self.isolated,
                    wheel_cache=self._wheel_cache,
                )
                more_reqs.extend(self.add_requirement(
                    sub_install_req, req_to_install.name,
                    extras_requested=extras_requested))

            # We add req_to_install before its dependencies, so that we
            # can refer to it when adding dependencies.
            if not self.has_requirement(req_to_install.name):
                # 'unnamed' requirements will get added here
                self.add_requirement(req_to_install, None)

            if not ignore_dependencies:
                if (req_to_install.extras):
                    logger.debug(
                        "Installing extra requirements: %r",
                        ','.join(req_to_install.extras),
                    )
                missing_requested = sorted(
                    set(req_to_install.extras) - set(dist.extras)
                )
                for missing in missing_requested:
                    logger.warning(
                        '%s does not provide the extra \'%s\'',
                        dist, missing
                    )

                available_requested = sorted(
                    set(dist.extras) & set(req_to_install.extras)
                )
                for subreq in dist.requires(available_requested):
                    add_req(subreq, extras_requested=available_requested)

            # cleanup tmp src
            self.reqs_to_cleanup.append(req_to_install)

            if not req_to_install.editable and not req_to_install.satisfied_by:
                # XXX: --no-install leads this to report 'Successfully
                # downloaded' for only non-editable reqs, even though we took
                # action on them.
                self.successfully_downloaded.append(req_to_install)
        return more_reqs
Exemplo n.º 3
0
    def prepare_requirement(self, req_to_install, resolver, requirement_set):
        # ###################### #
        # # print log messages # #
        # ###################### #
        if req_to_install.editable:
            logger.info('Obtaining %s', req_to_install)
        else:
            # satisfied_by is only evaluated by calling _check_skip_installed,
            # so it must be None here.
            assert req_to_install.satisfied_by is None
            if not resolver.ignore_installed:
                skip_reason = resolver._check_skip_installed(req_to_install)

            if req_to_install.satisfied_by:
                assert skip_reason is not None, (
                    '_check_skip_installed returned None but '
                    'req_to_install.satisfied_by is set to %r'
                    % (req_to_install.satisfied_by,))
                logger.info(
                    'Requirement %s: %s (%s)', skip_reason,
                    req_to_install,
                    req_to_install.satisfied_by.version)
            else:
                if (req_to_install.link and
                        req_to_install.link.scheme == 'file'):
                    path = url_to_path(req_to_install.link.url)
                    logger.info('Processing %s', display_path(path))
                else:
                    logger.info('Collecting %s', req_to_install)

        assert resolver.require_hashes is not None, \
            "This should have been set in resolve()"

        with indent_log():
            # ################################ #
            # # vcs update or unpack archive # #
            # ################################ #
            if req_to_install.editable:
                if resolver.require_hashes:
                    raise InstallationError(
                        'The editable requirement %s cannot be installed when '
                        'requiring hashes, because there is no single file to '
                        'hash.' % req_to_install)
                req_to_install.ensure_has_source_dir(requirement_set.src_dir)
                req_to_install.update_editable(not requirement_set.is_download)
                abstract_dist = make_abstract_dist(req_to_install)
                abstract_dist.prep_for_dist()
                if requirement_set.is_download:
                    req_to_install.archive(requirement_set.download_dir)
                req_to_install.check_if_exists()
            elif req_to_install.satisfied_by:
                if resolver.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_to_install)
            else:
                # @@ 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_to_install.ensure_has_source_dir(requirement_set.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_to_install.source_dir`
                # package unpacked in `req_to_install.source_dir`
                if os.path.exists(
                        os.path.join(req_to_install.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_to_install, req_to_install.source_dir)
                    )
                req_to_install.populate_link(
                    resolver.finder,
                    resolver._is_upgrade_allowed(req_to_install),
                    resolver.require_hashes
                )
                # We can't hit this spot and have populate_link return None.
                # req_to_install.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_to_install.link
                link = req_to_install.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 resolver.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_to_install.original_link and
                            not req_to_install.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_to_install.hashes(
                    trust_internet=not resolver.require_hashes)
                if resolver.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 = requirement_set.download_dir
                    # We always delete unpacked sdists after pip ran.
                    autodelete_unpacked = True
                    if req_to_install.link.is_wheel \
                            and requirement_set.wheel_download_dir:
                        # when doing 'pip wheel` we download wheels to a
                        # dedicated dir.
                        download_dir = requirement_set.wheel_download_dir
                    if req_to_install.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_to_install.link, req_to_install.source_dir,
                        download_dir, autodelete_unpacked,
                        session=resolver.session, hashes=hashes,
                        progress_bar=requirement_set.progress_bar)
                except requests.HTTPError as exc:
                    logger.critical(
                        'Could not install requirement %s because '
                        'of error %s',
                        req_to_install,
                        exc,
                    )
                    raise InstallationError(
                        'Could not install requirement %s because '
                        'of HTTP error %s for URL %s' %
                        (req_to_install, exc, req_to_install.link)
                    )
                abstract_dist = make_abstract_dist(req_to_install)
                abstract_dist.prep_for_dist()
                if requirement_set.is_download:
                    # Make a .zip of the source_dir we already created.
                    if req_to_install.link.scheme in vcs.all_schemes:
                        req_to_install.archive(requirement_set.download_dir)
                # req_to_install.req is only avail after unpack for URL
                # pkgs repeat check_if_exists to uninstall-on-upgrade
                # (#14)
                if not resolver.ignore_installed:
                    req_to_install.check_if_exists()
                if req_to_install.satisfied_by:
                    should_modify = (
                        resolver.upgrade_strategy != "to-satisfy-only" or
                        resolver.ignore_installed
                    )
                    if should_modify:
                        # don't uninstall conflict if user install and
                        # conflict is not user install
                        if not (resolver.use_user_site and not
                                dist_in_usersite(req_to_install.satisfied_by)):
                            req_to_install.conflicts_with = \
                                req_to_install.satisfied_by
                        req_to_install.satisfied_by = None
                    else:
                        logger.info(
                            'Requirement already satisfied (use '
                            '--upgrade to upgrade): %s',
                            req_to_install,
                        )
        return abstract_dist