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3 \ :ã@s@dZddlZddlZdgZdZejejdZGdd„dƒZdS)a A generic class to build line-oriented command interpreters. Interpreters constructed with this class obey the following conventions: 1. End of file on input is processed as the command 'EOF'. 2. A command is parsed out of each line by collecting the prefix composed of characters in the identchars member. 3. A command `foo' is dispatched to a method 'do_foo()'; the do_ method is passed a single argument consisting of the remainder of the line. 4. Typing an empty line repeats the last command. (Actually, it calls the method `emptyline', which may be overridden in a subclass.) 5. There is a predefined `help' method. Given an argument `topic', it calls the command `help_topic'. With no arguments, it lists all topics with defined help_ functions, broken into up to three topics; documented commands, miscellaneous help topics, and undocumented commands. 6. The command '?' is a synonym for `help'. The command '!' is a synonym for `shell', if a do_shell method exists. 7. If completion is enabled, completing commands will be done automatically, and completing of commands args is done by calling complete_foo() with arguments text, line, begidx, endidx. text is string we are matching against, all returned matches must begin with it. line is the current input line (lstripped), begidx and endidx are the beginning and end indexes of the text being matched, which could be used to provide different completion depending upon which position the argument is in. The `default' method may be overridden to intercept commands for which there is no do_ method. The `completedefault' method may be overridden to intercept completions for commands that have no complete_ method. The data member `self.ruler' sets the character used to draw separator lines in the help messages. If empty, no ruler line is drawn. It defaults to "=". If the value of `self.intro' is nonempty when the cmdloop method is called, it is printed out on interpreter startup. This value may be overridden via an optional argument to the cmdloop() method. The data members `self.doc_header', `self.misc_header', and `self.undoc_header' set the headers used for the help function's listings of documented functions, miscellaneous topics, and undocumented functions respectively. éNÚCmdz(Cmd) Ú_c@sÒeZdZdZeZeZdZdZ dZ dZ dZ dZ dZdZd Zd0d d „Zd1d d„Zdd„Zdd„Zdd„Zdd„Zdd„Zdd„Zdd„Zdd„Zdd „Zd!d"„Zd#d$„Zd%d&„Zd'd(„Zd)d*„Z d+d,„Z!d2d.d/„Z"dS)3raA simple framework for writing line-oriented command interpreters. These are often useful for test harnesses, administrative tools, and prototypes that will later be wrapped in a more sophisticated interface. A Cmd instance or subclass instance is a line-oriented interpreter framework. There is no good reason to instantiate Cmd itself; rather, it's useful as a superclass of an interpreter class you define yourself in order to inherit Cmd's methods and encapsulate action methods. ú=ÚNz(Documented commands (type help ):zMiscellaneous help topics:zUndocumented commands:z*** No help on %séÚtabcCs@|dk r||_ntj|_|dk r(||_ntj|_g|_||_dS)aÐInstantiate a line-oriented interpreter framework. The optional argument 'completekey' is the readline name of a completion key; it defaults to the Tab key. If completekey is not None and the readline module is available, command completion is done automatically. The optional arguments stdin and stdout specify alternate input and output file objects; if not specified, sys.stdin and sys.stdout are used. N)ÚstdinÚsysÚstdoutÚcmdqueueÚ completekey)Úselfr rr ©rú/usr/lib64/python3.6/cmd.pyÚ__init__Ls z Cmd.__init__cCsŠ|jƒ|jr\|jr\y2ddl}|jƒ|_|j|jƒ|j|jdƒWnt k rZYnXzæ|dk rl||_ |j rˆ|j j t |j ƒdƒd}xª|�s6|jr¨|jjdƒ}nl|jrØyt|jƒ}Wntk rÔd}YnXn<|j j |jƒ|j jƒ|jjƒ}t|ƒ�s d}n |jdƒ}|j|ƒ}|j|ƒ}|j||ƒ}qŽW|jƒWd|j�r„|j�r„yddl}|j|jƒWnt k �r‚YnXXdS)zÆRepeatedly issue a prompt, accept input, parse an initial prefix off the received input, and dispatch to action methods, passing them the remainder of the line as argument. rNz : completeÚ ÚEOFz )ÚpreloopÚ use_rawinputr ÚreadlineZ get_completerZ old_completerZ set_completerÚcompleteÚparse_and_bindÚ ImportErrorÚintror ÚwriteÚstrr ÚpopÚinputÚpromptÚEOFErrorÚflushrÚlenÚrstripÚprecmdÚonecmdÚpostcmdÚpostloop)r rrÚstopÚlinerrrÚcmdloopbsN           z Cmd.cmdloopcCs|S)z‡Hook method executed just before the command line is interpreted, but after the input prompt is generated and issued. r)r r(rrrr#–sz Cmd.precmdcCs|S)z?Hook method executed just after a command dispatch is finished.r)r r'r(rrrr%�sz Cmd.postcmdcCsdS)z>Hook method executed once when the cmdloop() method is called.Nr)r rrrr¡sz Cmd.preloopcCsdS)zYHook method executed once when the cmdloop() method is about to return. Nr)r rrrr&¥sz Cmd.postloopcCsÀ|jƒ}|sdd|fS|ddkr4d|dd…}n2|ddkrft|dƒr\d|dd…}n dd|fSdt|ƒ}}x"||kr–|||jkr–|d}qvW|d|…||d…jƒ}}|||fS) zÖParse the line into a command name and a string containing the arguments. Returns a tuple containing (command, args, line). 'command' and 'args' may be None if the line couldn't be parsed. Nrú?zhelp rú!Zdo_shellzshell )ÚstripÚhasattrr!Ú identchars)r r(ÚiÚnÚcmdÚargrrrÚ parseline¬s      z Cmd.parselinec CsŽ|j|ƒ\}}}|s|jƒS|dkr.|j|ƒS||_|dkrBd|_|dkrT|j|ƒSyt|d|ƒ}Wntk r€|j|ƒSX||ƒSdS)ahInterpret the argument as though it had been typed in response to the prompt. This may be overridden, but should not normally need to be; see the precmd() and postcmd() methods for useful execution hooks. The return value is a flag indicating whether interpretation of commands by the interpreter should stop. NrrÚdo_)r3Ú emptylineÚdefaultÚlastcmdÚgetattrÚAttributeError)r r(r1r2Úfuncrrrr$Às    z Cmd.onecmdcCs|jr|j|jƒSdS)zªCalled when an empty line is entered in response to the prompt. If this method is not overridden, it repeats the last nonempty command entered. N)r7r$)r rrrr5Ûsz Cmd.emptylinecCs|jjd|ƒdS)z§Called on an input line when the command prefix is not recognized. If this method is not overridden, it prints an error message and returns. z*** Unknown syntax: %s N)r r)r r(rrrr6åsz Cmd.defaultcGsgS)z£Method called to complete an input line when no command-specific complete_*() method is available. By default, it returns an empty list. r)r ÚignoredrrrÚcompletedefaultîszCmd.completedefaultcsd|‰‡fdd„|jƒDƒS)Nr4cs"g|]}|jˆƒr|dd…‘qS)éN)Ú startswith)Ú.0Úa)Údotextrrú ùsz%Cmd.completenames..)Ú get_names)r Útextr;r)rArÚ completenames÷szCmd.completenamesc CsÚ|dkr¶ddl}|jƒ}|jƒ}t|ƒt|ƒ}|jƒ|}|jƒ|}|dkr |j|ƒ\} } } | dkrp|j} q¦yt|d| ƒ} Wq¦t k rœ|j} Yq¦Xn|j } | ||||ƒ|_ y |j |St k rÔdSXdS)zÕReturn the next possible completion for 'text'. If a command has not been entered, then complete against command list. Otherwise try to call complete_ to get list of completions. rNrZ complete_) rZget_line_bufferÚlstripr!Z get_begidxZ get_endidxr3r<r8r9rEZcompletion_matchesÚ IndexError) r rDÚstaterZorigliner(ÚstrippedZbegidxZendidxr1ÚargsZfooZcompfuncrrrrûs*   z Cmd.completecCs t|jƒS)N)ÚdirÚ __class__)r rrrrCsz Cmd.get_namescs4t|jˆŽƒ}t‡fdd„|jƒDƒƒ}t||BƒS)Nc3s,|]$}|jdˆdƒr|dd…VqdS)Úhelp_réN)r>)r?r@)rJrrú sz$Cmd.complete_help..)ÚsetrErCÚlist)r rJZcommandsZtopicsr)rJrÚ complete_helpszCmd.complete_helpc Cs¸|r˜yt|d|ƒ}Wnvtk rŒy0t|d|ƒj}|rT|jjdt|ƒƒdSWntk rjYnX|jjdt|j|fƒƒdSX|ƒ�n|jƒ}g}g}i}x,|D]$}|dd…dkr²d||dd…<q²W|jƒd} xx|D]p}|dd…dkrì|| k�r qì|} |dd…} | |k�r8|j | ƒ|| =qìt||ƒj�rR|j | ƒqì|j | ƒqìW|jjdt|j ƒƒ|j |j |d d ƒ|j |j t|jƒƒd d ƒ|j |j|d d ƒdS) zEList available commands with "help" or detailed help with "help cmd".rMr4z%s NrNrrr=ééP)r8r9Ú__doc__r rrÚnohelprCÚsortÚappendÚ doc_leaderÚ print_topicsÚ doc_headerÚ misc_headerrQÚkeysÚ undoc_header) r r2r:ÚdocÚnamesZcmds_docZ cmds_undocÚhelpÚnameZprevnamer1rrrÚdo_help$sN        z Cmd.do_helpcCs\|rX|jjdt|ƒƒ|jr<|jjdt|jt|ƒƒƒ|j||dƒ|jjdƒdS)Nz%s rr)r rrÚrulerr!Ú columnize)r ÚheaderZcmdsZcmdlenZmaxcolrrrrZRs zCmd.print_topicsrTcsüˆs|jjdƒdS‡fdd„ttˆƒƒDƒ}|rJtddjtt|ƒƒƒ‚tˆƒ}|dkrv|jjdtˆd ƒƒdSx¾tdtˆƒƒD]š}||d|}g}d }xrt|ƒD]f} d } x Ncsg|]}tˆ|tƒs|‘qSr)Ú isinstancer)r?r/)rQrrrBdsz!Cmd.columnize..z list[i] not a string for i in %sz, rz%s rérz éþÿÿÿéÿÿÿÿrj) r rÚranger!Ú TypeErrorÚjoinÚmaprÚmaxrXÚljust)r rQZ displaywidthZ nonstringsÚsizeZnrowsZncolsZ colwidthsZtotwidthÚcolZcolwidthÚrowr/ÚxZtextsr)rQrreZsZ       z Cmd.columnize)rNN)N)rT)#Ú__name__Ú __module__Ú __qualname__rUÚPROMPTrÚ IDENTCHARSr.rdr7rrYr[r\r^rVrrr)r#r%rr&r3r$r5r6r<rErrCrRrcrZrerrrrr4s<   4   .) rUÚstringr Ú__all__rxZ ascii_lettersZdigitsryrrrrrÚ+s