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On exit from this routine, `entry` is added to the end of the working set's ``.entries`` (if it wasn't already present). `dist` is only added to the working set if it's for a project that doesn't already have a distribution in the set, unless `replace=True`. If it's added, any callbacks registered with the ``subscribe()`` method will be called. )rËN) Ú insert_onrëÚlocationrìrþr6rír»Ú _added_new)r“r•rðÚinsertrËÚkeysÚkeys2rrrrús zWorkingSet.addcCs‚t|ƒddd…}i}i}g}tƒ} t t¡} xL|r|| d¡}||krLq2| ||¡sZq2| |j¡}|dkr|j |j¡}|dks’||krü|rü|} |dkrÂ|dkr²t |jƒ}nt gƒ}tgƒ} |j || ||d}||j<|dkrü| |d¡}t||ƒ‚| |¡||kr(| |}t||ƒ |¡‚| |j¡ddd…}| |¡x(|D] }| | |j¡|j| |<qNWd||<q2W|S)aÎList all distributions needed to (recursively) meet `requirements` `requirements` must be a sequence of ``Requirement`` objects. `env`, if supplied, should be an ``Environment`` instance. 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N) rÚsortrbrër‘rrúÚas_requirementrùrhr#r%r&)r“Ú plugin_envÚfull_envrÚfallbackÚplugin_projectsÚ error_infoÚ distributionsrÚ shadow_setrr•r–Ú resolveesr rrrÚfind_plugins's4$ zWorkingSet.find_pluginscGs*| t|ƒ¡}x|D]}| |¡qW|S)a¾Ensure that distributions matching `requirements` are activated `requirements` must be a string or a (possibly-nested) sequence thereof, specifying the distributions and versions required. The return value is a sequence of the distributions that needed to be activated to fulfill the requirements; all relevant distributions are included, even if they were already activated in this working set. )rùrmrú)r“rÚneededr•rrrrM{s zWorkingSet.requirecCs<||jkrdS|j |¡|s"dSx|D]}||ƒq(WdS)zƒInvoke `callback` for all distributions If `existing=True` (default), call on all existing ones, as well. 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