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a XC?hsk � @ s d Z dZddlZddlZddlZddlZddlZddlZddlZddl m Z ddl m Z m Z mZ ddlmZ ddlmZmZ dd lmZ d!d d �ZG d d� de�Zdd� Zdd� Zdd� Zdd� Z dd� Z G dd� de�Z G dd � d e �Z G d d � d e�Z!G d d � d e �Z"dS )"z�Refactoring framework. Used as a main program, this can refactor any number of files and/or recursively descend down directories. Imported as a module, this provides infrastructure to write your own refactoring tool. z#Guido van Rossum <guido@python.org>� N)�chain� )�driver�tokenize�token)� find_root)�pytree�pygram)� btm_matcherTc C sT t | g g dg�}g }t�|j�D ].\}}}|�d�r |rD|dd� }|�|� q |S )zEReturn a sorted list of all available fix names in the given package.�*�fix_� N)� __import__�pkgutilZ iter_modules�__path__� startswith�append)Z fixer_pkgZ remove_prefixZpkgZ fix_names�finder�nameZispkg� r �5/opt/alt/python39/lib64/python3.9/lib2to3/refactor.py�get_all_fix_names s r c @ s e Zd ZdS )� _EveryNodeN��__name__� __module__� __qualname__r r r r r + s r c C s� t | tjtjf�r(| jdu r t�| jhS t | tj�rH| jrDt| j�S t�t | tj �r�t � }| jD ] }|D ]}|� t|�� qhq`|S t d| ��dS )zf Accepts a pytree Pattern Node and returns a set of the pattern types which will match first. Nz$Oh no! I don't understand pattern %s) � isinstancer Z NodePatternZ LeafPattern�typer ZNegatedPatternZcontent�_get_head_typesZWildcardPattern�set�update� Exception)Zpat�r�p�xr r r r / s r c C s� t �t�}g }| D ]v}|jrbzt|j�}W n tyF |�|� Y q�0 |D ]}|| �|� qLq|jdur~||j �|� q|�|� qtt j j � � t j j �D ]}|| �|� q�t|�S )z^ Accepts a list of fixers and returns a dictionary of head node type --> fixer list. 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Returns: (pre_order, post_order), where pre_order is the list of fixers that want a pre-order AST traversal, and post_order is the list that want post-order traversal. r r2 r ���N�_� c S s g | ] }|� � �qS r )�title)r3 r$ r r r r6 � � z.RefactoringTool.get_fixers.<locals>.<listcomp>zCan't find %s.%sTzSkipping optional fixer: %szAdding transformation: %sZpreZpostzIllegal fixer order: %rZ run_order��key)ra r �rsplitr � FILE_PREFIX�len�split� CLASS_PREFIX�join�getattr�AttributeErrorrW re rk rb � log_message� log_debug�orderr �operator� attrgetter�sort) ru Zpre_order_fixersZpost_order_fixersZ fix_mod_path�modr4 �parts� class_nameZ fix_classr/ Zkey_funcr r r rm � s: � zRefactoringTool.get_fixersc O s � dS )z Called when an error occurs.Nr )ru �msg�args�kwdsr r r � log_error s zRefactoringTool.log_errorc G s |r || }| j �|� dS )zHook to log a message.N)r` �info�ru r� r� r r r r� s zRefactoringTool.log_messagec G s |r || }| j �|� d S r8 )r` �debugr� r r r r� s zRefactoringTool.log_debugc C s dS )zTCalled with the old version, new version, and filename of a refactored file.Nr )ru �old_text�new_text�filename�equalr r r � print_output s z RefactoringTool.print_outputc C s8 |D ].}t j�|�r$| �|||� q| �|||� qdS )z)Refactor a list of files and directories.N)�os�path�isdir� refactor_dir� refactor_file)ru �items�write� doctests_onlyZ dir_or_filer r r �refactor s zRefactoringTool.refactorc C s� t jd }t �|�D ]�\}}}| �d|� |�� |�� |D ]>}|�d�s>t j�|�d |kr>t j�||�} | � | ||� q>dd� |D �|dd�< qdS )z�Descends down a directory and refactor every Python file found. 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Files and subdirectories starting with '.' are skipped. �pyzDescending into %sr2 r c S s g | ]}|� d �s|�qS r1 )r )r3 Zdnr r r r6 2 r{ z0RefactoringTool.refactor_dir.<locals>.<listcomp>N) r� �extsep�walkr� r� r r� �splitextr� r� ) ru Zdir_namer� r� Zpy_ext�dirpathZdirnames� filenamesr �fullnamer r r r� s �z RefactoringTool.refactor_dirc C s� zt |d�}W n4 tyB } z | �d||� W Y d}~dS d}~0 0 z t�|j�d }W |�� n |�� 0 tj |d|dd�� }|�� |fW d � S 1 s�0 Y dS ) zG Do our best to decode a Python source file correctly. �rbzCan't open %s: %sN)NNr r# ry ��encoding�newline) �open�OSErrorr� r �detect_encodingrG �closerE �read)ru r� �f�errr� r r r �_read_python_source4 s z#RefactoringTool._read_python_sourcec C s� | � |�\}}|du rdS |d7 }|rn| �d|� | �||�}| jsL||kr`| �|||||� q�| �d|� nH| �||�}| js�|r�|jr�| jt|�dd� |||d� n | �d|� dS )zRefactors a file.N� zRefactoring doctests in %szNo doctest changes in %srw )r� r� zNo changes in %s)r� r� �refactor_docstringr\ �processed_file�refactor_string� was_changed�str)ru r� r� r� �inputr� �output�treer r r r� D s �z RefactoringTool.refactor_filec C s� t |�}d|v rtj| j_zfz| j�|�}W nF tyr } z.| �d||jj |� W Y d}~W | j| j_dS d}~0 0 W | j| j_n | j| j_0 ||_ | � d|� | � ||� |S )aF Refactor a given input string. 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Returns: An AST corresponding to the refactored input stream; None if there were errors during the parse. rZ zCan't parse %s: %s: %sNzRefactoring %s) rV r Z!python_grammar_no_print_statementr rf Z parse_stringr" r� � __class__r �future_featuresr� � refactor_tree)ru �datar rS r� r� r r r r� [ s" � � z RefactoringTool.refactor_stringc C s� t j�� }|rN| �d� | �|d�}| js2||krB| �|d|� q�| �d� n:| �|d�}| jsj|r~|jr~| �t |�d|� n | �d� d S )Nz Refactoring doctests in stdinz<stdin>zNo doctest changes in stdinzNo changes in stdin) �sys�stdinr� r� r� r\ r� r� r� r� )ru r� r� r� r� r r r �refactor_stdinv s z RefactoringTool.refactor_stdinc C s� t | j| j�D ]}|�||� q| �| j|�� � | �| j|�� � | j�|� � �}t |� � ��r�| jj D �]B}||v rj|| rj|| j tjjdd� |jr�|| j tjjd� t|| �D ]�}||| v r�|| �|� z t|� W n t� y� Y q�Y n0 |j�r||jv �rq�|�|�}|r�|�||�}|dur�|�|� |�� D ] }|j�s\g |_|j�|� �qJ| j�|� � �}|D ]*} | |v�r�g || < || � || � �q�q�qjqTt | j| j�D ]}|� ||� �q�|j S )a� Refactors a parse tree (modifying the tree in place). For compatible patterns the bottom matcher module is used. Otherwise the tree is traversed node-to-node for matches. Args: tree: a pytree.Node instance representing the root of the tree to be refactored. name: a human-readable name for this tree. Returns: True if the tree was modified, False otherwise. T)r} �reverser| N) r rn ro Z start_tree� traverse_byrs rt rr �runZleaves�anyr+ ra r� r ZBaseZdepthZkeep_line_orderZ get_linenor( �remover � ValueErrorZfixers_applied�match� transform�replacer r- Z finish_treer� ) ru r� r r/ Z match_set�node�results�newZ new_matchesZfxrr r r r� � sJ z RefactoringTool.refactor_treec C sV |sdS |D ]D}||j D ]4}|�|�}|r|�||�}|dur|�|� |}qq dS )a Traverse an AST, applying a set of fixers to each node. This is a helper method for refactor_tree(). Args: fixers: a list of fixer instances. traversal: a generator that yields AST nodes. Returns: None N)r r� r� r� )ru ra Z traversalr� r/ r� r� r r r r� � s zRefactoringTool.traverse_byc C s� | j �|� |du r.| �|�d }|du r.dS ||k}| �||||� |r`| �d|� | js`dS |rv| �||||� n | �d|� dS )zR Called when a file has been refactored and there may be changes. Nr zNo changes to %szNot writing changes to %s)rp r r� r� r� r\ � write_file)ru r� r� r� r� r� r� r r r r� � s z RefactoringTool.processed_filec C s� zt j|d|dd�}W n4 tyJ } z | �d||� W Y d}~dS d}~0 0 |�R z|�|� W n2 ty� } z| �d||� W Y d}~n d}~0 0 W d � n1 s�0 Y | �d|� d| _dS ) z�Writes a string to a file. It first shows a unified diff between the old text and the new text, and then rewrites the file; the latter is only done if the write option is set. �wry r� zCan't create %s: %sNzCan't write %s: %szWrote changes to %sT)rE r� r� r� r� r� rl )ru r� r� r� r� �fpr� r r r r� s B zRefactoringTool.write_filez>>> z... c C s g }d}d}d}d}|j dd�D ]�}|d7 }|�� �| j�r~|durZ|�| �||||�� |}|g}|�| j�} |d| � }q |dur�|�|| j �s�||| j�� d kr�|� |� q |dur�|�| �||||�� d}d}|� |� q |du�r |�| �||||�� d� |�S )a� Refactors a docstring, looking for doctests. This returns a modified version of the input string. It looks for doctests, which start with a ">>>" prompt, and may be continued with "..." prompts, as long as the "..." is indented the same as the ">>>". (Unfortunately we can't use the doctest module's parser, since, like most parsers, it is not geared towards preserving the original source.) Nr T��keependsr r� ry ) � splitlines�lstripr �PS1r- �refactor_doctest�find�PS2�rstripr r� ) ru r� r� �result�blockZ block_lineno�indent�lineno�line�ir r r r� sD � �� � �z"RefactoringTool.refactor_docstringc s z�� ||� �}W nh tyz } zP�j�tj�rL|D ]}��d|�d�� q4��d|||j j |� |W Y d}~S d}~0 0 �� ||��rt |�j dd�}|d|d � ||d d� } }|d �d�s�|d d7 < � �j |�d � g}|�r|� �fd d �|D �7 }|S ) z�Refactors one doctest. A doctest is given as a block of lines, the first of which starts with ">>>" (possibly indented), while the remaining lines start with "..." (identically indented). z Source: %sr� z+Can't parse docstring in %s line %s: %s: %sNTr� r rw r c s g | ]}� �j | �qS r )r� )r3 r� �r� ru r r r6 ^ r{ z4RefactoringTool.refactor_doctest.<locals>.<listcomp>)� parse_blockr" r` Z isEnabledForrj �DEBUGr� r� r� r� r r� r� r� �endswithr� �pop) ru r� r� r� r� r� r� r� r� Zclippedr r� r r� D s& �"z RefactoringTool.refactor_doctestc C s� | j r d}nd}| js$| �d|� n"| �d|� | jD ]}| �|� q6| jrl| �d� | jD ]}| �|� q\| jr�t| j�dkr�| �d� n| �dt| j�� | jD ]"\}}}| j|g|�R i |�� q�d S ) N�werez need to bezNo files %s modified.zFiles that %s modified:z$Warnings/messages while refactoring:r zThere was 1 error:zThere were %d errors:)rl rp r� rk ri r� )ru r� �file�messager� r� r� r r r � summarizea s$ zRefactoringTool.summarizec C s" | j �| �|||��}t� |_|S )z�Parses a block into a tree. This is necessary to get correct line number / offset information in the parser diagnostics and embedded into the parse tree. )r Z parse_tokens� wrap_toksrH r� )ru r� r� r� r� r r r r� x s zRefactoringTool.parse_blockc c sd t �| �||�j�}|D ]F\}}\}}\} } } ||d 7 }| |d 7 } ||||f| | f| fV qdS )z;Wraps a tokenize stream to systematically modify start/end.r N)r rD � gen_lines�__next__) ru r� r� r� r, r rU Zline0Zcol0Zline1Zcol1Z line_textr r r r� � s zRefactoringTool.wrap_toksc c sx || j }|| j }|}|D ]N}|�|�r>|t|�d� V n(||�� d krVdV ntd||f ��|}q dV qldS )z�Generates lines as expected by tokenize from a list of lines. This strips the first len(indent + self.PS1) characters off each line. Nr� zline=%r, prefix=%rry )r� r� r r� r� �AssertionError)ru r� r� �prefix1Zprefix2�prefixr� r r r r� � s zRefactoringTool.gen_lines)NN)FF)FF)FF)F)NFN)N) r r r rc r� r rv rm r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r r r r rY � s@ � 7( O � + rY c @ s e Zd ZdS )�MultiprocessingUnsupportedNr r r r r r� � s r� c sB e Zd Z� fdd�Zd � fdd� Z� fdd�Z� fd d �Z� ZS ) �MultiprocessRefactoringToolc s& t t| �j|i |�� d | _d | _d S r8 )�superr� rv �queue� output_lock�ru r� �kwargs�r� r r rv � s z$MultiprocessRefactoringTool.__init__Fr c s> |dkr t t���|||�S z dd l� W n ty> t�Y n0 �jd urRtd��� �� �_� � � �_ � �fdd�t |�D �}zn|D ] }|� � q�t t���|||� W �j� � t |�D ]}�j�d � q�|D ]}|�� r�|� � q�d �_nL�j� � t |�D ]}�j�d � �q |D ]}|�� �r|� � �qd �_0 d S )Nr r z already doing multiple processesc s g | ]}� j �jd ��qS ))�target)ZProcess�_child)r3 r� ��multiprocessingru r r r6 � s �z8MultiprocessRefactoringTool.refactor.<locals>.<listcomp>)r� r� r� r� � ImportErrorr� r� � RuntimeErrorZ JoinableQueueZLockr� �range�startr� �putZis_alive)ru r� r� r� Z num_processesZ processesr$ r� r� r� r r� � sF � � � � z$MultiprocessRefactoringTool.refactorc s\ | j �� }|d urX|\}}z$tt| �j|i |�� W | j �� n | j �� 0 | j �� }q d S r8 )r� rh r� r� r� Z task_done)ru Ztaskr� r� r� r r r� � s ��z"MultiprocessRefactoringTool._childc s6 | j d ur | j �||f� ntt| �j|i |��S d S r8 )r� r r� r� r� r� r� r r r� � s ��z)MultiprocessRefactoringTool.refactor_file)FFr )r r r rv r� r� r� � __classcell__r r r� r r� � s � r� )T)#rX � __author__rE r� r r� rj r� r& � itertoolsr Zpgen2r r r Z fixer_utilr ry r r r rq r r" r r r0 r7 r: rV rW �objectrY r� r� r r r r �<module> s8 (
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