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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.
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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.
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| j j S( N( R4 t satisfied_by( R" R7 ( ( s3 /usr/lib/python2.7/site-packages/pip/req/req_set.pyR6 � s c C@ s d S( N( ( R" ( ( s3 /usr/lib/python2.7/site-packages/pip/req/req_set.pyR8 � s ( R1 R2 R6 R8 ( ( ( s3 /usr/lib/python2.7/site-packages/pip/req/req_set.pyRI � s t RequirementSetc B@ s� e Z e e e e e e e e e e e e e e e d � Z d � Z d � Z e e d � Z d � Z e
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| _ | | _ | r� t | � } n | | _ | | _ | | _ t t � | _ d S( s3 Create a RequirementSet.
:param wheel_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.
:param download_dir: Where still packed archives should be written to.
If None they are not saved, and are deleted immediately after
unpacking.
:param wheel_cache: The pip wheel cache, for passing to
InstallRequirement.
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d | � � n t | _ t t t! | j � j" t! | j � � � � | _ t j# d | | j � | g } n | } | r�| j | � } | j$ | j | � n | Sd S( s' Add install_req as a requirement to install.
:param parent_req_name: The name of the requirement that needed this
added. The name is used because when multiple unnamed requirements
resolve to the same name, we could otherwise end up with dependency
links that point outside the Requirements set. parent_req must
already be added. Note that None implies that this is a user
supplied requirement, vs an inferred one.
:param extras_requested: an iterable of extras used to evaluate the
environement markers.
:return: Additional requirements to scan. That is either [] if
the requirement is not applicable, or [install_req] if the
requirement is applicable and has just been added.
s6 Ignoring %s: markers '%s' don't match your environments- %s is not a supported wheel on this platform.s5 Double requirement given: %s (already in %s, name=%r)sh Could not satisfy constraints for '%s': installation from path or url cannot be constrained to a versions Setting %s extras to: %sN(% Rh t
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Prepare process. Create temp directories, download and/or unpack files.
c s@ s | ] } | j Vq d S( N( t has_hash_options( R� Rj ( ( s3 /usr/lib/python2.7/site-packages/pip/req/req_set.pys <genexpr>i s s� --egg is not allowed with --require-hashes mode, since it delegates dependency resolution to setuptools and could thus result in installation of unhashed packages.Re RX N( Rc R RW RU R& Re t anyR] R R R t extendt
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prepare_files] s, c C@ s. | j o- | j d k p- | j d k o- | j S( Nt eagers only-if-needed( RQ RR R| ( R" Rj ( ( s3 /usr/lib/python2.7/site-packages/pip/req/req_set.pyt _is_upgrade_allowed� s c C@ s� | j � | j r� | j | � } t } | r� | j p= | j s� y | j | | � Wq� t k
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o� t | j � s� | j | _ n d | _ q� n | r� d } n | j d k r� d } n d } | Sd Sd S( s Check if req_to_install should be skipped.
This will check if the req is installed, and whether we should upgrade
or reinstall it, taking into account all the relevant user options.
After calling this req_to_install will only have satisfied_by set to
None if the req_to_install is to be upgraded/reinstalled etc. Any
other value will be a dist recording the current thing installed that
satisfies the requirement.
Note that for vcs urls and the like we can't assess skipping in this
routine - we simply identify that we need to pull the thing down,
then later on it is pulled down and introspected to assess upgrade/
reinstalls etc.
:return: A text reason for why it was skipped, or None.
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jJ | � D] } | | d | �q^Wn � jK jL � � � j r�� j r�� jM jL � � n Wd QX� S( sx Prepare a single requirements file.
:return: A list of additional InstallRequirements to also install.
s Obtaining %ss Requirement %s: %st files
Processing %ss
Collecting %sso The editable requirement %s cannot be installed when requiring hashes, because there is no single file to hash.s� 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.s setup.pys� 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.t trust_internetR` t hashess4 Could not install requirement %s because of error %ssD Could not install requirement %s because of HTTP error %s for URL %ss< Requirement already satisfied (use --upgrade to upgrade): %si c @ sM t t | � � d � j d � j �} � j � j | � j d | �� d S( NRb Rg R� ( R Rp Rb Rd R� R� Rh ( t subreqR� t sub_install_req( t more_reqsR4 R" ( s3 /usr/lib/python2.7/site-packages/pip/req/req_set.pyt add_req� s s! Installing extra requirements: %rt ,s" %s does not provide the extra '%s'R� N(N R t preparedR� R: Rw t infoRS R� RJ R< t schemeR t urlR R R t ensure_has_source_dirRO t update_editableR� R? R8 t archiveRP R� R� RI RN R� R� R� R. RB R t
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c C@ s? t j d � t � �# x | j D] } | j � q! WWd QXd S( s Clean up files, remove builds.s Cleaning up...N( Rw R� R R\ R� ( R" Rj ( ( s3 /usr/lib/python2.7/site-packages/pip/req/req_set.pyt
cleanup_files� s
c @ sO g � t � � � � � � f d � � x! � j j � D] } � | � q7 W� S( s� Create the installation order.
The installation order is topological - requirements are installed
before the requiring thing. We break cycles at an arbitrary point,
and make no other guarantees.
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Install everything in this set (after having downloaded and unpacked
the packages)
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