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편집 파일: locators.cpython-36.pyc
3 �PfE� � @ s@ d dl Z d dlmZ d dlZd dlZd dlZd dlZd dlZy d dlZW n e k rd d dl ZY nX d dl Z ddl m Z ddlmZmZmZmZmZmZmZmZmZmZmZmZm Z m Z m Z ddl m Z m!Z!m"Z" ddl#m$Z$ ddl%m&Z&m'Z'm(Z(m)Z)m*Z*m+Z+m,Z,m-Z-m.Z. dd l/m0Z0m1Z1 dd l2m3Z3m4Z4 ej5e6�Z7ej8d �Z9ej8d ej:�Z;ej8d �Z<dZ=d-dd�Z>G dd� de�Z?G dd� de@�ZAG dd� deA�ZBG dd� deA�ZCG dd� de@�ZDG dd � d eA�ZEG d d � d eA�ZFG d d � d eA�ZGG d!d"� d"eA�ZHG d#d$� d$eA�ZIeIeG� eEd%d&d'�d(d)�ZJeJjKZKej8d*�ZLG d+d,� d,e@�ZMdS ).� N)�BytesIO� )�DistlibException)�urljoin�urlparse� urlunparse� url2pathname� pathname2url�queue�quote�unescape� string_types� build_opener�HTTPRedirectHandler� text_type�Request� HTTPError�URLError)� Distribution�DistributionPath� make_dist)�Metadata) �cached_property�parse_credentials� ensure_slash�split_filename�get_project_data�parse_requirement�parse_name_and_version� ServerProxy�normalize_name)� get_scheme�UnsupportedVersionError)�Wheel� is_compatiblez^(\w+)=([a-f0-9]+)z;\s*charset\s*=\s*(.*)\s*$z text/html|application/x(ht)?mlz https://pypi.python.org/pypic C s | dkr t } t| dd�}|j� S )z� Return all distribution names known by an index. :param url: The URL of the index. :return: A list of all known distribution names. Ng @)�timeout)� DEFAULT_INDEXr � list_packages)�url�client� r* � /usr/lib/python3.6/locators.py�get_all_distribution_names) s r, c @ s$ e Zd ZdZdd� Ze Z ZZdS )�RedirectHandlerzE A class to work around a bug in some Python 3.2.x releases. c C s� d }x dD ]}||kr || }P q W |d kr0d S t |�}|jdkrpt|j� |�}t|d�rh|j||� n|||< tj| |||||�S )N�location�uri� �replace_header)r. r/ )r �schemer Z get_full_url�hasattrr1 �BaseRedirectHandler�http_error_302) �self�req�fp�code�msg�headersZnewurl�keyZurlpartsr* r* r+ r5 = s z RedirectHandler.http_error_302N)�__name__� __module__� __qualname__�__doc__r5 Zhttp_error_301Zhttp_error_303Zhttp_error_307r* r* r* r+ r- 4 s r- c @ s� e Zd ZdZd/Zd0Zd1Zd Zed2 Zd3dd�Z dd� Z dd� Z dd� Z dd� Z dd� Zee e�Zdd� Zd d � Zd d � Zd d!� Zd"d#� Zd$d%� Zd&d'� Zd(d)� Zd*d+� Zd4d-d.�Zd S )5�LocatorzG A base class for locators - things that locate distributions. �.tar.gz�.tar.bz2�.tar�.zip�.tgz�.tbz�.egg�.exe�.whl�.pdfN�defaultc C s, i | _ || _tt� �| _d| _tj� | _dS )a^ Initialise an instance. :param scheme: Because locators look for most recent versions, they need to know the version scheme to use. This specifies the current PEP-recommended scheme - use ``'legacy'`` if you need to support existing distributions on PyPI. N) �_cacher2 r r- �opener�matcherr �Queue�errors)r6 r2 r* r* r+ �__init__c s zLocator.__init__c C sX g }xN| j j� sRy| j jd�}|j|� W n | j jk rD wY nX | j j� qW |S )z8 Return any errors which have occurred. F)rQ �empty�get�appendZEmpty� task_done)r6 �result�er* r* r+ � get_errorsv s zLocator.get_errorsc C s | j � dS )z> Clear any errors which may have been logged. N)rY )r6 r* r* r+ � clear_errors� s zLocator.clear_errorsc C s | j j� d S )N)rM �clear)r6 r* r* r+ � clear_cache� s zLocator.clear_cachec C s | j S )N)�_scheme)r6 r* r* r+ � _get_scheme� s zLocator._get_schemec C s || _ d S )N)r] )r6 �valuer* r* r+ � _set_scheme� s zLocator._set_schemec C s t d��dS )a= For a given project, get a dictionary mapping available versions to Distribution instances. This should be implemented in subclasses. If called from a locate() request, self.matcher will be set to a matcher for the requirement to satisfy, otherwise it will be None. z Please implement in the subclassN)�NotImplementedError)r6 �namer* r* r+ � _get_project� s zLocator._get_projectc C s t d��dS )zJ Return all the distribution names known to this locator. z Please implement in the subclassN)ra )r6 r* r* r+ �get_distribution_names� s z Locator.get_distribution_namesc C sL | j dkr| j|�}n2|| j kr,| j | }n | j� | j|�}|| j |< |S )z� For a given project, get a dictionary mapping available versions to Distribution instances. This calls _get_project to do all the work, and just implements a caching layer on top. N)rM rc rZ )r6 rb rW r* r* r+ � get_project� s zLocator.get_projectc C sP t |�}tj|j�}d}|jd�}|r6tt|�| j�}|jdkd|j k|||fS )zu Give an url a score which can be used to choose preferred URLs for a given project release. Tz.whl�httpszpypi.python.org) r � posixpath�basename�path�endswithr$ r# � wheel_tagsr2 �netloc)r6 r( �trh Z compatibleZis_wheelr* r* r+ � score_url� s zLocator.score_urlc C sR |}|rN| j |�}| j |�}||kr(|}||kr@tjd||� ntjd||� |S )a{ Choose one of two URLs where both are candidates for distribution archives for the same version of a distribution (for example, .tar.gz vs. zip). The current implementation favours https:// URLs over http://, archives from PyPI over those from other locations, wheel compatibility (if a wheel) and then the archive name. zNot replacing %r with %rzReplacing %r with %r)rn �logger�debug)r6 �url1�url2rW �s1�s2r* r* r+ � prefer_url� s zLocator.prefer_urlc C s t ||�S )zZ Attempt to split a filename in project name, version and Python version. )r )r6 �filename� project_namer* r* r+ r � s zLocator.split_filenamec C s dd� }d}t |�\}}}}} } | j� jd�r<tjd|| � tj| �} | rX| j� \} } nd\} } |}|r�|d dkr�|dd� }|jd��r2yrt |�}t || j �� r�|dkr�d }n ||j |�}|� r�|j |j |jt||||| d f�d jd d � |jD ��d�}W n0 tk �r. } ztjd|� W Y dd}~X nX n�|j| j��r�tj|� }}x�| jD ]�}|j|��rV|dt|� � }| j||�}|�s�tjd|� nJ|\}}}| �s�|||��r�|||t||||| d f�d�}|�r�||d< P �qVW |�r| �r| |d| < |S )a See if a URL is a candidate for a download URL for a project (the URL has typically been scraped from an HTML page). If it is, a dictionary is returned with keys "name", "version", "filename" and "url"; otherwise, None is returned. c S s t | �t |�kS )N)r )Zname1Zname2r* r* r+ � same_project� s z:Locator.convert_url_to_download_info.<locals>.same_projectNzegg=z %s: version hint in fragment: %rr �/z.whlTr0 z, c S s" g | ]}d j t|dd� ���qS )�.� N)�join�list)�.0�vr* r* r+ � <listcomp> s z8Locator.convert_url_to_download_info.<locals>.<listcomp>)rb �versionrv r( zpython-versionzinvalid path for wheel: %sz No match for project/version: %s)rb r� rv r( zpython-versionz %s_digest)NN���r� )r �lower� startswithro rp � HASHER_HASH�match�groupsrj r# r$ rk rb r� rv r r| �pyver� Exception�warning�downloadable_extensionsrg rh �lenr )r6 r( rw rx rW r2 rl ri �params�query�frag�m�algo�digestZorigpath�wheel�includerX rv Zextrm rb r� r� r* r* r+ � convert_url_to_download_info� sf z$Locator.convert_url_to_download_infoc C s4 d}x*dD ]"}d| }||kr ||| f}P q W |S )z� Get a digest from a dictionary by looking at keys of the form 'algo_digest'. Returns a 2-tuple (algo, digest) if found, else None. Currently looks only for SHA256, then MD5. N�sha256�md5z %s_digest)r� r� r* )r6 �inforW r� r< r* r* r+ � _get_digest) s zLocator._get_digestc C s� |j d�}|j d�}||kr,|| }|j}nt||| jd�}|j}| j|� |_}|d }||d |< |j|d kr�| j|j|�|_|d j|t � �j |� | |_ |||< dS )z� Update a result dictionary (the final result from _get_project) with a dictionary for a specific version, which typically holds information gleaned from a filename or URL for an archive for the distribution. rb r� )r2 r( �digests�urlsN) �pop�metadatar r2 r� r� � source_urlru � setdefault�set�add�locator) r6 rW r� rb r� �dist�mdr� r( r* r* r+ �_update_version_data9 s z Locator._update_version_dataFc C s� d}t |�}|dkr td| ��t| j�}|j|j� | _}tjd|t|�j � | j |j �}t |�dk�r8g }|j } x�|D ]|} | d kr�qzyJ|j| �s�tjd|| � n,|s�| | �j r�|j| � ntjd| |j � W qz tk r� tjd || � Y qzX qzW t |�d k�rt||jd �}|�r8tjd |� |d } || }|�r�|j�rN|j|_|jdi �j| t� �|_i } |jdi �} x&|jD ] }|| k�r~| | | |< �q~W | |_d| _|S )a Find the most recent distribution which matches the given requirement. :param requirement: A requirement of the form 'foo (1.0)' or perhaps 'foo (>= 1.0, < 2.0, != 1.3)' :param prereleases: If ``True``, allow pre-release versions to be located. Otherwise, pre-release versions are not returned. :return: A :class:`Distribution` instance, or ``None`` if no such distribution could be located. NzNot a valid requirement: %rzmatcher: %s (%s)r{ r� r� z%s did not match %rz%skipping pre-release version %s of %szerror matching %s with %rr )r< zsorted list: %s)r� r� r� )r r r! r2 rO � requirementro rp �typer= re rb r� Z version_classr� Z is_prereleaserU r� r� �sortedr< ZextrasrT r� � download_urlsr� )r6 r� � prereleasesrW �rr2 rO �versionsZslistZvcls�kr� �dZsdr( r* r* r+ �locateP sT zLocator.locate)rB rC rD rE rF rG )rH rI rJ )rK )rJ )rL )F)r= r> r? r@ �source_extensions�binary_extensions�excluded_extensionsrk r� rR rY rZ r\ r^ r` �propertyr2 rc rd re rn ru r r� r� r� r� r* r* r* r+ rA S s. FrA c s0 e Zd ZdZ� fdd�Zdd� Zdd� Z� ZS )�PyPIRPCLocatorz� This locator uses XML-RPC to locate distributions. It therefore cannot be used with simple mirrors (that only mirror file content). c s* t t| �jf |� || _t|dd�| _dS )z� Initialise an instance. :param url: The URL to use for XML-RPC. :param kwargs: Passed to the superclass constructor. g @)r% N)�superr� rR �base_urlr r) )r6 r( �kwargs)� __class__r* r+ rR � s zPyPIRPCLocator.__init__c C s t | jj� �S )zJ Return all the distribution names known to this locator. )r� r) r' )r6 r* r* r+ rd � s z%PyPIRPCLocator.get_distribution_namesc C s i i d�}| j j|d�}x�|D ]�}| j j||�}| j j||�}t| jd�}|d |_|d |_|jd�|_ |jdg �|_ |jd�|_ t |�}|r |d } | d |_ | j| �|_| |_|||< xB|D ]:} | d } | j| �} |d j|t� �j| � | |d | < q�W q W |S ) N)r� r� T)r2 rb r� �license�keywords�summaryr r( r� r� )r) Zpackage_releasesZ release_urlsZ release_datar r2 rb r� rT r� r� r� r r� r� r� r� r� r� r� ) r6 rb rW r� r r� �datar� r� r� r( r� r* r* r+ rc � s0 zPyPIRPCLocator._get_project)r= r> r? r@ rR rd rc � __classcell__r* r* )r� r+ r� � s r� c s0 e Zd ZdZ� fdd�Zdd� Zdd� Z� ZS )�PyPIJSONLocatorzw This locator uses PyPI's JSON interface. It's very limited in functionality and probably not worth using. c s t t| �jf |� t|�| _d S )N)r� r� rR r r� )r6 r( r� )r� r* r+ rR � s zPyPIJSONLocator.__init__c C s t d��dS )zJ Return all the distribution names known to this locator. z Not available from this locatorN)ra )r6 r* r* r+ rd � s z&PyPIJSONLocator.get_distribution_namesc C s i i d�}t | jdt|� �}�y�| jj|�}|j� j� }tj|�}t | j d�}|d }|d |_ |d |_ |j d�|_|j dg �|_|j d �|_t|�}| |_|d } |||j < x`|d D ]T} | d }|jj|� | j| �|j|< |d j|j t� �j|� | j| �|d |< q�W x�|d j� D ]�\} } | |j k�r:�q"t | j d�} |j | _ | | _ t| �}| |_||| < x\| D ]T} | d }|jj|� | j| �|j|< |d j| t� �j|� | j| �|d |< �qpW �q"W W n@ tk �r } z"| jj t |�� t j d|� W Y d d }~X nX |S )N)r� r� z%s/json)r2 r� rb r� r� r� r� r� r( r� ZreleaseszJSON fetch failed: %s) r r� r rN �open�read�decode�json�loadsr r2 rb r� rT r� r� r� r r� r� r� r� r� r� r� �itemsr� rQ �putr ro � exception)r6 rb rW r( �respr� r� r� r� r� r� r� ZinfosZomd�odistrX r* r* r+ rc � sT " z PyPIJSONLocator._get_project)r= r> r? r@ rR rd rc r� r* r* )r� r+ r� � s r� c @ s` e Zd ZdZejdejejB ejB �Z ejdejejB �Z dd� Z ejdej�Z e dd� �Zd S ) �Pagez4 This class represents a scraped HTML page. z� (rel\s*=\s*(?:"(?P<rel1>[^"]*)"|'(?P<rel2>[^']*)'|(?P<rel3>[^>\s ]*))\s+)? href\s*=\s*(?:"(?P<url1>[^"]*)"|'(?P<url2>[^']*)'|(?P<url3>[^>\s ]*)) (\s+rel\s*=\s*(?:"(?P<rel4>[^"]*)"|'(?P<rel5>[^']*)'|(?P<rel6>[^>\s ]*)))? z!<base\s+href\s*=\s*['"]?([^'">]+)c C s4 || _ | | _| _| jj| j �}|r0|jd�| _dS )zk Initialise an instance with the Unicode page contents and the URL they came from. r N)r� r� r( �_base�search�group)r6 r� r( r� r* r* r+ rR s z Page.__init__z[^a-z0-9$&+,/:;=?@.#%_\\|-]c C s� dd� }t � }x�| jj| j�D ]�}|jd�}|d pZ|d pZ|d pZ|d pZ|d pZ|d }|d pr|d pr|d }t| j|�}t|�}| jj d d� |�}|j ||f� q W t |dd� dd�}|S )z� Return the URLs of all the links on a page together with information about their "rel" attribute, for determining which ones to treat as downloads and which ones to queue for further scraping. c S s, t | �\}}}}}}t||t|�|||f�S )zTidy up an URL.)r r r )r( r2 rl ri r� r� r� r* r* r+ �clean% s zPage.links.<locals>.cleanr0 Zrel1Zrel2Zrel3Zrel4Zrel5Zrel6rq rr Zurl3c S s dt | jd�� S )Nz%%%2xr )�ordr� )r� r* r* r+ �<lambda>3 s z Page.links.<locals>.<lambda>c S s | d S )Nr r* )rm r* r* r+ r� 7 s T)r< �reverse) r� �_href�finditerr� � groupdictr r� r � _clean_re�subr� r� )r6 r� rW r� r� �relr( r* r* r+ �links s z Page.linksN)r= r> r? r@ �re�compile�I�S�Xr� r� rR r� r r� r* r* r* r+ r� s r� c s� e Zd ZdZejdd� dd� d�Zd � fdd � Zd d � Zd d � Z dd� Z e j de j �Zdd� Zdd� Zdd� Zdd� Zdd� Ze j d�Zd d � Z� ZS ) �SimpleScrapingLocatorz� A locator which scrapes HTML pages to locate downloads for a distribution. This runs multiple threads to do the I/O; performance is at least as good as pip's PackageFinder, which works in an analogous fashion. c C s t jtt�d�j� S )N)Zfileobj)�gzipZGzipFiler r� r� )�br* r* r+ r� E s z SimpleScrapingLocator.<lambda>c C s | S )Nr* )r� r* r* r+ r� F s )Zdeflater� ZnoneN� c sf t t| �jf |� t|�| _|| _i | _t� | _t j � | _ t� | _ d| _ || _tj� | _tj� | _dS )a� Initialise an instance. :param url: The root URL to use for scraping. :param timeout: The timeout, in seconds, to be applied to requests. This defaults to ``None`` (no timeout specified). :param num_workers: The number of worker threads you want to do I/O, This defaults to 10. :param kwargs: Passed to the superclass. FN)r� r� rR r r� r% � _page_cacher� �_seenr rP � _to_fetch� _bad_hosts�skip_externals� num_workers� threading�RLock�_lock�_gplock)r6 r( r% r� r� )r� r* r+ rR I s z SimpleScrapingLocator.__init__c C sJ g | _ x>t| j�D ]0}tj| jd�}|jd� |j� | j j|� qW dS )z� Threads are created only when get_project is called, and terminate before it returns. They are there primarily to parallelise I/O (i.e. fetching web pages). )�targetTN) �_threads�ranger� r� ZThread�_fetchZ setDaemon�startrU )r6 �irm r* r* r+ �_prepare_threadsc s z&SimpleScrapingLocator._prepare_threadsc C s> x| j D ]}| jjd� qW x| j D ] }|j� q$W g | _ dS )zu Tell all the threads to terminate (by sending a sentinel value) and wait for them to do so. N)r� r� r� r| )r6 rm r* r* r+ � _wait_threadsp s z#SimpleScrapingLocator._wait_threadsc C s� i i d�}| j �x || _|| _t| jdt|� �}| jj� | jj� | j � z&t j d|� | j j |� | j j� W d | j� X | `W d Q R X |S )N)r� r� z%s/z Queueing %s)r� rW rw r r� r r� r[ r� r� ro rp r� r� r| r� )r6 rb rW r( r* r* r+ rc } s z"SimpleScrapingLocator._get_projectz<\b(linux-(i\d86|x86_64|arm\w+)|win(32|-amd64)|macosx-?\d+)\bc C s | j j|�S )zD Does an URL refer to a platform-specific download? )�platform_dependentr� )r6 r( r* r* r+ �_is_platform_dependent� s z,SimpleScrapingLocator._is_platform_dependentc C sT | j |�rd}n| j|| j�}tjd||� |rP| j� | j| j|� W dQ R X |S )a% See if an URL is a suitable download for a project. If it is, register information in the result dictionary (for _get_project) about the specific version it's for. Note that the return value isn't actually used other than as a boolean value. Nzprocess_download: %s -> %s)r� r� rw ro rp r� r� rW )r6 r( r� r* r* r+ �_process_download� s z'SimpleScrapingLocator._process_downloadc C s� t |�\}}}}}}|j| j| j | j �r2d}n~| jrL|j| j� rLd}nd|j| j�s^d}nR|d krld}nD|dkrzd}n6| j|�r�d}n&|j dd�d } | j � d kr�d}nd }t j d ||||� |S )z� Determine whether a link URL from a referring page and with a particular "rel" attribute should be queued for scraping. F�homepage�download�httprf �ftp�:r r Z localhostTz#should_queue: %s (%s) from %s -> %s)r� r� )r� rf r� ) r rj r� r� r� r� r� r� r� �splitr� ro rp ) r6 �linkZreferrerr� r2 rl ri �_rW �hostr* r* r+ � _should_queue� s* z#SimpleScrapingLocator._should_queuec C s� x�| j j� }z�yz|r�| j|�}|dkr(wx\|jD ]R\}}|| jkr0| jj|� | j|� r0| j|||�r0tj d||� | j j |� q0W W n2 t k r� } z| j j t |�� W Y dd}~X nX W d| j j� X |sP qW dS )z� Get a URL to fetch from the work queue, get the HTML page, examine its links for download candidates and candidates for further scraping. This is a handy method to run in a thread. NzQueueing %s from %s)r� rT �get_pager� r� r� r� r� ro rp r� r� rQ r rV )r6 r( �pager� r� rX r* r* r+ r� � s& & z SimpleScrapingLocator._fetchc C sX t |�\}}}}}}|dkr:tjjt|��r:tt|�d�}|| jkr`| j| }tj d||� �n�|j dd�d }d}|| j kr�tj d||� �n�t |d d id �}�z�y�tj d |� | j j|| jd �} tj d|� | j� } | jdd�} tj| ��r�| j� } | j� } | jd�}|�r"| j| }|| �} d}tj| �}|�r@|jd�}y| j|�} W n tk �rn | jd�} Y nX t | | �}|| j| < W n� t k �r� } z |j dk�r�tj d||� W Y dd}~X n� t k �r } z2tj d||� | j!� | j j"|� W dQ R X W Y dd}~X n2 t#k �rB } ztj d||� W Y dd}~X nX W d|| j|< X |S )a Get the HTML for an URL, possibly from an in-memory cache. XXX TODO Note: this cache is never actually cleared. It's assumed that the data won't get stale over the lifetime of a locator instance (not necessarily true for the default_locator). �filez index.htmlzReturning %s from cache: %sr� r r Nz Skipping %s due to bad host %szAccept-encodingZidentity)r; z Fetching %s)r% z Fetched %sz Content-Typer0 zContent-Encodingzutf-8zlatin-1i� zFetch failed: %s: %s)$r �osri �isdirr r r r� ro rp r� r� r rN r� r% r� rT �HTML_CONTENT_TYPEr� Zgeturlr� �decoders�CHARSETr� r� r� � UnicodeErrorr� r r9 r� r r� r� r� )r6 r( r2 rl ri r� rW r� r7 r� r; Z content_typeZ final_urlr� �encoding�decoderr� rX r* r* r+ r � sZ &$ z SimpleScrapingLocator.get_pagez<a href=[^>]*>([^<]+)<c C sP t � }| j| j�}|s$td| j ��x&| jj|j�D ]}|j|jd�� q4W |S )zJ Return all the distribution names known to this locator. zUnable to get %sr ) r� r r� r � _distname_rer� r� r� r� )r6 rW r r� r* r* r+ rd $ s z,SimpleScrapingLocator.get_distribution_names)Nr� )r= r> r? r@ �zlibZ decompressr rR r� r� rc r� r� r� r� r� r� r� r� r r rd r� r* r* )r� r+ r� ; s" ; r� c s8 e Zd ZdZ� fdd�Zdd� Zdd� Zdd � Z� ZS ) �DirectoryLocatorz? This class locates distributions in a directory tree. c sN |j dd�| _tt| �jf |� tjj|�}tjj|�sDt d| ��|| _ dS )a� Initialise an instance. :param path: The root of the directory tree to search. :param kwargs: Passed to the superclass constructor, except for: * recursive - if True (the default), subdirectories are recursed into. If False, only the top-level directory is searched, � recursiveTzNot a directory: %rN) r� r r� r rR r ri �abspathr r �base_dir)r6 ri r� )r� r* r+ rR 5 s zDirectoryLocator.__init__c C s |j | j�S )z� Should a filename be considered as a candidate for a distribution archive? 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N)r� r rR � isinstancer �AssertionError�distpath)r6 r r� )r� r* r+ rR � s zDistPathLocator.__init__c C sP | j j|�}|d kr i i d�}n,|j|d|jt|jg�id|jtd g�ii}|S )N)r� r� r� r� )r Zget_distributionr� r� r� )r6 rb r� rW r* r* r+ rc � s z DistPathLocator._get_project)r= r> r? r@ rR rc r� r* r* )r� r+ r � s r c sR e Zd ZdZ� fdd�Z� fdd�Zdd� Zeej j e�Z dd � Z d d � Z � Z S ) �AggregatingLocatorzI This class allows you to chain and/or merge a list of locators. c s* |j dd�| _|| _tt| �jf |� dS )a� Initialise an instance. :param locators: The list of locators to search. :param kwargs: Passed to the superclass constructor, except for: * merge - if False (the default), the first successful search from any of the locators is returned. If True, the results from all locators are merged (this can be slow). �mergeFN)r� r �locatorsr� r rR )r6 r! r� )r� r* r+ rR � s zAggregatingLocator.__init__c s* t t| �j� x| jD ] }|j� qW d S )N)r� r r\ r! )r6 r� )r� r* r+ r\ � s z AggregatingLocator.clear_cachec C s || _ x| jD ] }||_qW d S )N)r] r! r2 )r6 r_ r� r* r* r+ r` � s z AggregatingLocator._set_schemec C s� i }x�| j D ]�}|j|�}|r | jr�|jdi �}|jdi �}|j|� |jd�}|r�|r�x6|j� D ]*\}} ||kr�|| | O < qb| ||< qbW |jd�} |r�| r�| j|� q | jd kr�d} n$d} x |D ]}| jj|�r�d} P q�W | r |}P q W |S )Nr� r� TF)r! re r rT �updater� rO r� ) r6 rb rW r� r� r r� Zdfr� r Zdd�foundr* r* r+ rc � s8 z AggregatingLocator._get_projectc C s@ t � }x4| jD ]*}y||j� O }W q tk r6 Y qX qW |S )zJ Return all the distribution names known to this locator. )r� r! rd ra )r6 rW r� r* r* r+ rd � s z)AggregatingLocator.get_distribution_names)r= r> r? r@ rR r\ r` r� rA r2 �fgetrc rd r� r* r* )r� r+ r � s ,r z https://pypi.python.org/simple/g @)r% �legacy)r2 z1(?P<name>[\w-]+)\s*\(\s*(==\s*)?(?P<ver>[^)]+)\)$c @ sL e Zd ZdZddd�Zdd� Zdd� Zd d � Zd d � Zd d� Z ddd�Z dS )�DependencyFinderz0 Locate dependencies for distributions. Nc C s |pt | _t| jj�| _dS )zf Initialise an instance, using the specified locator to locate distributions. N)�default_locatorr� r! r2 )r6 r� r* r* r+ rR s zDependencyFinder.__init__c C sv t jd|� |j}|| j|< || j||jf< xD|jD ]:}t|�\}}t jd|||� | jj |t � �j ||f� q4W dS )z� Add a distribution to the finder. This will update internal information about who provides what. :param dist: The distribution to add. zadding distribution %szAdd to provided: %s, %s, %sN) ro rp r< � dists_by_name�distsr� �providesr �providedr� r� r� )r6 r� rb �pr� r* r* r+ �add_distribution& s z!DependencyFinder.add_distributionc C s| t jd|� |j}| j|= | j||jf= xN|jD ]D}t|�\}}t jd|||� | j| }|j ||f� |s0| j|= q0W dS )z� Remove a distribution from the finder. This will update internal information about who provides what. :param dist: The distribution to remove. zremoving distribution %sz Remove from provided: %s, %s, %sN) ro rp r< r( r) r� r* r r+ �remove)r6 r� rb r, r� �sr* r* r+ �remove_distribution5 s z$DependencyFinder.remove_distributionc C sB y| j j|�}W n, tk r< |j� d }| j j|�}Y nX |S )z� Get a version matcher for a requirement. :param reqt: The requirement :type reqt: str :return: A version matcher (an instance of :class:`distlib.version.Matcher`). r )r2 rO r" r� )r6 �reqtrO rb r* r* r+ � get_matcherG s z DependencyFinder.get_matcherc C sv | j |�}|j}t� }| j}||krrxL|| D ]@\}}y|j|�}W n tk r\ d}Y nX |r.|j|� P q.W |S )z� Find the distributions which can fulfill a requirement. :param reqt: The requirement. :type reqt: str :return: A set of distribution which can fulfill the requirement. F)r2 r< r� r+ r� r" r� ) r6 r1 rO rb rW r+ r� �providerr� r* r* r+ �find_providersW s z DependencyFinder.find_providersc C s� | j | }t� }x,|D ]$}| j|�}|j|j�s|j|� qW |r^|jd||t|�f� d}nD| j|� | j |= x"|D ]}| j j|t� �j|� qvW | j |� d}|S )a� Attempt to replace one provider with another. This is typically used when resolving dependencies from multiple sources, e.g. A requires (B >= 1.0) while C requires (B >= 1.1). For successful replacement, ``provider`` must meet all the requirements which ``other`` fulfills. :param provider: The provider we are trying to replace with. :param other: The provider we're trying to replace. :param problems: If False is returned, this will contain what problems prevented replacement. This is currently a tuple of the literal string 'cantreplace', ``provider``, ``other`` and the set of requirements that ``provider`` couldn't fulfill. :return: True if we can replace ``other`` with ``provider``, else False. Z cantreplaceFT) �reqtsr� r2 r� r� r� � frozensetr0 r� r- ) r6 r3 �other�problemsZrlistZ unmatchedr/ rO rW r* r* r+ �try_to_replaceo s" z DependencyFinder.try_to_replaceFc C s i | _ i | _i | _i | _t|p g �}d|krH|jd� |tdddg�O }t|t�rh| }}tj d|� n4| j j ||d� }}|dkr�t d| ��tj d |� d |_ t� }t|g�}t|g�}�x�|�r�|j� }|j} | | jkr�| j|� n"| j| } | |k�r | j|| |� |j|jB } |j} t� } ||k�rbx2dD ]*}d| }||k�r4| t|d| �O } �q4W | | B | B }�x>|D �]4}| j|�}|�sNtj d|� | j j ||d�}|dk�r�| �r�| j j |d d�}|dk�r�tj d|� |jd|f� n^|j|j }}||f| jk�r|j|� |j|� || k�rN||k�rN|j|� tj d|j� xZ|D ]R}|j} | | jk�r�| jj|t� �j|� n"| j| } | |k�rT| j|| |� �qTW �qvW q�W t| jj� �}x.|D ]&}||k|_ |j �r�tj d|j� �q�W tj d|� ||fS )a� Find a distribution and all distributions it depends on. :param requirement: The requirement specifying the distribution to find, or a Distribution instance. :param meta_extras: A list of meta extras such as :test:, :build: and so on. :param prereleases: If ``True``, allow pre-release versions to be returned - otherwise, don't return prereleases unless they're all that's available. 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