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zBModule for parsing and testing package version predicate strings.
� Nz'(?i)^\s*([a-z_]\w*(?:\.[a-z_]\w*)*)(.*)z^\s*\((.*)\)\s*$z%^\s*(<=|>=|<|>|!=|==)\s*([^\s,]+)\s*$c C s6 t �| �}|std| ��|�� \}}|tj�|�fS )zVParse a single version comparison.
Return (comparison string, StrictVersion)
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)�<z<=z==�>z>=z!=c @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) �VersionPredicatea� Parse and test package version predicates.
>>> v = VersionPredicate('pyepat.abc (>1.0, <3333.3a1, !=1555.1b3)')
The `name` attribute provides the full dotted name that is given::
>>> v.name
'pyepat.abc'
The str() of a `VersionPredicate` provides a normalized
human-readable version of the expression::
>>> print(v)
pyepat.abc (> 1.0, < 3333.3a1, != 1555.1b3)
The `satisfied_by()` method can be used to determine with a given
version number is included in the set described by the version
restrictions::
>>> v.satisfied_by('1.1')
True
>>> v.satisfied_by('1.4')
True
>>> v.satisfied_by('1.0')
False
>>> v.satisfied_by('4444.4')
False
>>> v.satisfied_by('1555.1b3')
False
`VersionPredicate` is flexible in accepting extra whitespace::
>>> v = VersionPredicate(' pat( == 0.1 ) ')
>>> v.name
'pat'
>>> v.satisfied_by('0.1')
True
>>> v.satisfied_by('0.2')
False
If any version numbers passed in do not conform to the
restrictions of `StrictVersion`, a `ValueError` is raised::
>>> v = VersionPredicate('p1.p2.p3.p4(>=1.0, <=1.3a1, !=1.2zb3)')
Traceback (most recent call last):
...
ValueError: invalid version number '1.2zb3'
It the module or package name given does not conform to what's
allowed as a legal module or package name, `ValueError` is
raised::
>>> v = VersionPredicate('foo-bar')
Traceback (most recent call last):
...
ValueError: expected parenthesized list: '-bar'
>>> v = VersionPredicate('foo bar (12.21)')
Traceback (most recent call last):
...
ValueError: expected parenthesized list: 'bar (12.21)'
c C s� |� � }|std��t�|�}|s.td| ��|�� \| _}|� � }|r�t�|�}|sbtd| ��|�� d }dd� |�d�D �| _| js�td| ��ng | _d S )
z*Parse a version predicate string.
zempty package restrictionzbad package name in %rz expected parenthesized list: %rr c S s g | ] }t |��qS r )r
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<listcomp>t s z-VersionPredicate.__init__.<locals>.<listcomp>�,z empty parenthesized list in %rN) �stripr �re_validPackager r �name�re_paren�splitr )�selfZversionPredicateStrr Zparen�strr r r �__init__` s$
zVersionPredicate.__init__c C s8 | j r.dd� | j D �}| jd d�|� d S | jS d S )Nc S s g | ]\}}|d t |� �qS )� )r )r �cond�verr r r r } s z,VersionPredicate.__str__.<locals>.<listcomp>z (z, �))r r �join)r �seqr r r �__str__{ s zVersionPredicate.__str__c C s* x$| j D ]\}}t| ||�sdS qW dS )z�True if version is compatible with all the predicates in self.
The parameter version must be acceptable to the StrictVersion
constructor. It may be either a string or StrictVersion.
FT)r �compmap)r r r r r r r � satisfied_by� s z VersionPredicate.satisfied_byN)�__name__�
__module__� __qualname__�__doc__r r" r$ r r r r r s ?r c C sd t dkrt�dtj�a | �� } t �| �}|s8td| ��|�d�pDd}|rVtj �
|�}|�d�|fS )a9 Return the name and optional version number of a provision.
The version number, if given, will be returned as a `StrictVersion`
instance, otherwise it will be `None`.
>>> split_provision('mypkg')
('mypkg', None)
>>> split_provision(' mypkg( 1.2 ) ')
('mypkg', StrictVersion ('1.2'))
Nz=([a-zA-Z_]\w*(?:\.[a-zA-Z_]\w*)*)(?:\s*\(\s*([^)\s]+)\s*\))?$z"illegal provides specification: %r� � ) �
_provision_rx�re�compile�ASCIIr r r �groupr r r )�value�mr r r r �split_provision� s
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