o Ni@sdZddlZddlZddlZddlZddlmZddlmZgdZ e dZ e dej Z d d ZGd d d eZGd ddeZGdddeZddZGdddZdGddZdGddZGdddeZGdddZGdddZGdd d ZGd!d"d"ZeZ[dHd$d%Ze d&Zgd'Z e d(Z!e d)Z"d*d+Z#d,d-Z$dId.d/Z%dJd1d2Z&d3d4Z'd5d6Z(d7d8Z)d9d:Z*d;d<Z+d=d>Z,d?d@Z-dAdBZ.dCZ/dGdDdEZ0e1dFkre0dSdS)Ka A small templating language This implements a small templating language. This language implements if/elif/else, for/continue/break, expressions, and blocks of Python code. The syntax is:: {{any expression (function calls etc)}} {{any expression | filter}} {{for x in y}}...{{endfor}} {{if x}}x{{elif y}}y{{else}}z{{endif}} {{py:x=1}} {{py: def foo(bar): return 'baz' }} {{default var = default_value}} {{# comment}} You use this with the ``Template`` class or the ``sub`` shortcut. The ``Template`` class takes the template string and the name of the template (for errors) and a default namespace. 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%r>)r,rrrYrrrrZrzTemplateObjectGetter.__repr__N)rrr rrrZrrrrrs rc@s<eZdZddZddZddZddZd d Zd d Zd S)_EmptycOs|Srr)rrrbrrrr z_Empty.__call__cCdSNrjrrYrrrr rz_Empty.__str__cCr)NrrrYrrrrZrz_Empty.__repr__cCrrrrYrrr __unicode__rz_Empty.__unicode__cCstdS)Nr)iterrYrrr__iter__sz_Empty.__iter__cCr)NFrrYrrr__bool__rz_Empty.__bool__N) rrr rr rZrrrrrrrr s rTcCsp|durtjdtjdf}d}g}d}|ddf}tdt|dt|df} | |D]c} | d} t|| ||} | |dkrU|rUt d|d| |d | |dkrh|sht d |d| |d | |dkr||| } | r}| | d }n| ||| |fd}| }| }q2|rt d |d||d ||d} | r| | |rt |}|S)aY Lex a string into chunks: >>> lex('hey') ['hey'] >>> lex('hey {{you}}') ['hey ', ('you', (1, 7))] >>> lex('hey {{') Traceback (most recent call last): ... TemplateError: No }} to finish last expression at line 1 column 7 >>> lex('hey }}') Traceback (most recent call last): ... TemplateError: }} outside expression at line 1 column 7 >>> lex('hey {{ {{') Traceback (most recent call last): ... TemplateError: {{ inside expression at line 1 column 10 Nr0r1Frrz%s|%sz%s inside expressionroz%s outside expressionTzNo %s to finish last expression)rr) rr<recompileescapefinditergroup find_positionrrrrwtrim_lex)srtrim_whitespacer6r7in_exprchunkslastlast_postoken_rematchrrrrrrlex%sV          rz.^(?:if |elif |for |def |inherit |default |py:))rendifendforenddefr|r}z \n\r?[\t ]*$z ^[\t ]*\nc Csd}t|D]\}}t|trq|d}t|s|tvrq|s#d}n||d}|dt|kr4d}n||d}t|trDt|tsEq| pLt|}|dkrW|sWd}|durg|d|krg|sgd}|r|r|t |s||t|dkr|s|r|dkr|r|dkrd||d<nt|}|d| d}|||d<|r|}|t|dkr|sd||d<qt |}|| d}|||d<q|S)aa Takes a lexed set of tokens, and removes whitespace when there is a directive on a line by itself: >>> tokens = lex('{{if x}}\nx\n{{endif}}\ny', trim_whitespace=False) >>> tokens [('if x', (1, 3)), '\nx\n', ('endif', (3, 3)), '\ny'] >>> trim_lex(tokens) [('if x', (1, 3)), 'x\n', ('endif', (3, 3)), 'y'] NrrjrTrVr) enumerater r statement_researchsingle_statementsr^trail_whitespace_restriplead_whitespace_rerr) tokens last_trimicurrentrzprev next_chunkprev_okmrrrrjsX         rcCsJ|d||}|dkr||d||}n|d||}|d||fS)z/Given a string and index, return (line, column) rr)countrfind)stringindex last_indexrlinescolumnrrrrs rcCsT|durtjdtjdf}t||||d}g}|r(t||\}}|||s|S)a Parses a string into a kind of AST >>> parse('{{x}}') [('expr', (1, 3), 'x')] >>> parse('foo') ['foo'] >>> parse('{{if x}}test{{endif}}') [('cond', (1, 3), ('if', (1, 3), 'x', ['test']))] >>> parse('series->{{for x in y}}x={{x}}{{endfor}}') ['series->', ('for', (1, 11), ('x',), 'y', ['x=', ('expr', (1, 27), 'x')])] >>> parse('{{for x, y in z:}}{{continue}}{{endfor}}') [('for', (1, 3), ('x', 'y'), 'z', [('continue', (1, 21))])] >>> parse('{{py:x=1}}') [('py', (1, 3), 'x=1')] >>> parse('{{if x}}a{{elif y}}b{{else}}c{{endif}}') [('cond', (1, 3), ('if', (1, 3), 'x', ['a']), ('elif', (1, 12), 'y', ['b']), ('else', (1, 23), None, ['c']))] Some exceptions:: >>> parse('{{continue}}') Traceback (most recent call last): ... TemplateError: continue outside of for loop at line 1 column 3 >>> parse('{{if x}}foo') Traceback (most recent call last): ... TemplateError: No {{endif}} at line 1 column 3 >>> parse('{{else}}') Traceback (most recent call last): ... TemplateError: else outside of an if block at line 1 column 3 >>> parse('{{if x}}{{for x in y}}{{endif}}{{endfor}}') Traceback (most recent call last): ... TemplateError: Unexpected endif at line 1 column 25 >>> parse('{{if}}{{endif}}') Traceback (most recent call last): ... TemplateError: if with no expression at line 1 column 3 >>> parse('{{for x y}}{{endfor}}') Traceback (most recent call last): ... TemplateError: Bad for (no "in") in 'x y' at line 1 column 3 >>> parse('{{py:x=1\ny=2}}') Traceback (most recent call last): ... TemplateError: Multi-line py blocks must start with a newline at line 1 column 3 Nr0r1r5)rr<r parse_exprrw)rrr6r7rrdrrrrrFs2 rFrcCs t|dtr|d|ddfS|d\}}|}|drc|ddd}|ds3|drM|d}d|vrH|dd}|dd }|d7}n d|vrXtd ||d d ||f|ddfS|d vr|d|vrrtd||d ||f|ddfS|drt|||S|ds|dkrtd|d||d |dvrtd|||d |dvrtd|||d |drt |||S|drt |||S|drt |||S|drt |||S|drd||ddf|ddfSd||ddf|ddfS)Nrrpy:rz r z rjz.Multi-line py blocks must start with a newlineror{)r|r}r~zcontinue outside of for loopif elif rz%s outside of an if block)ifelifr~z%s with no expression)rrrz Unexpected %sfor default inherit def #rr) r r r startswithlstripreplacer parse_condr parse_for parse_default parse_inherit parse_def)rrcontextrrrrrrsl                  rcCs|dd}g}|d} |std||dt|dtr3|dddkr3d|ft||ddfSt|||\}}||q )Nrr)rzMissing {{endif}}rorr)rr rparse_one_condrw)rrr$rpiecesrrrrr s  rcCs|d|dd\}}}g}|dr|dd}|dr,d||dd|f}n%|dr>d ||d d|f}n|d krId |d|f}nJd ||f |s[td ||dt|dtr|dddks{|ddds{|ddd kr||fSt|||\}}||qR)Nrr:r4rrrrrrzUnexpected token %r at %sz No {{endif}}ror)rErrrr rrrw)rrr$firstrr8rrrrrr%0s4     r%c CsB|d\}}|dd}d|}g}|dsJ||dr&|dd}|dd}t|}|s>td|||d |d|}d |vrStd |||d td d |d|dD}|| d} |swtd||d t |dtr|dddkrd||||f|ddfSt |||\} }| | qn)Nrr)r~rr'r4rzBad for (no "in") in %rro(z=You cannot have () in the variable section of a for loop (%r)cSsg|] }|r|qSr)rrrrrr^s zparse_for..,z No {{endfor}}rr~) rrErin_rerrrrrrr rrw) rrr$r)rr8rrrrrrrr KsL      r cCs|d\}}|ds J|ddd}|dd}t|dkr*td|||d|d}d|vr;td||dt|sItd |||d|d}d |||f|ddfS) Nrrr=z:Expression must be {{default var=value}}; no = found in %rror+z'{{default x, y = ...}} is not supportedz-Not a valid variable name for {{default}}: %rr)rrr^rrvar_rer)rrr$r)rrnrrrrrr!ns0      r!cCs@|d\}}|ds J|ddd}d||f|ddfS)Nrrrrf)rr)rrr$r)rrrrrr"s r"c Cs|d\}}|dd}|dsJ|ddd}|dr&|dd}d|vr3|}dddif}n"|dsAtd |||d |dd}|dd\}}t|||}|d }g} |setd ||d t|dtr|ddd krd||||f|ddfSt|||\} }|| q\)Nrrrr'r4r*r)z*Function definition doesn't end with ): %sro)rzMissing {{enddef}}rr) rrrErparse_signaturer rrrw) rrr$r)rrsigsig_textr8rrrrr#s<        r#cs^tt|jg}d}d}i}dfdd } d}|\} } | tjkr&n| tjkr:| dks3| dkr:| }|\} } | tjkrHtd|||d| } |\} } | tjks]| tjkrw| d krw|dkrd| }n |dkrk| }n|| | tjkrvnq|durtd|||d| tjkr(| d kr(d} d} d }d}}g} |d \} } }}|dur|}|}| tjkr|rtd|||d|s| tjks| tjkr| d krt |||}||| <|| nL|| | f|r| tjkr| | kr|d7}n4|r | tjkr | | kr |d8}|s d} } n|s'| tjkr'| d vr'| } d}dddd | } qq||||fS)NFcs\zt\}}\}}\}}}WntytjdfYSw|r*||||f||ffS||fSr)next StopIterationtokenize ENDMARKER)rtok_type tok_stringsrowscolerowecollinerrr get_tokens z"parse_signature..get_tokenr*z**zInvalid signature: (%s)ror+r-rT)r*[{r/]})F) r5generate_tokensrreadliner6OPNAMErrwisolate_expression)r2rrrvar_argrrr? var_arg_typer7r8var_name nest_type unnest_type nest_count start_posend_posrnrr default_exprrr>rr0s            9r0c Cs|\}}|d8}|\}}|d8}|d}||kr!||||S|||dg}|||d||t|krF|||d|d|S)NrTrj) splitlinesextendr^rwr) r rPrQr9r:r;r<rrnrrrrIs   rIzn%prog [OPTIONS] TEMPLATE arg=value Use py:arg=value to set a Python value; otherwise all values are strings. cCsddl}ddl}ddl}ddl}|dur|jdd}|d}|jt|td}|j ddddd d |j d d d dd| |\}}t |dkrRt d| d|d}|dd}i} |jrg| |j|D],} d| vrzt d| | d| dd\} } | dr| dd} t| } | | | <qi|dkr|j} d}nt|d } | } Wdn1swYt| |d}|| }|jrt|jd} | |WddS1swYdS|j|dS)NrrPaste)versionusagez-oz--outputoutputFILENAMEz(File to write output to (default stdout))destmetavarhelpz--envuse_env store_truez-Put the environment in as top-level variables)rZactionr\z!You must give a template filenamerVr-zBad argument: %rrr-zrMrwb)r@optparse pkg_resourcesr)argvget_distribution OptionParserr_fill_command_usage add_option parse_argsr^printexitr]r_environrrrstdinrOrNrrgrXwritestdout)rr@rbrcr)distparseroptions template_namerrvrtemplate_contentrTrrdrrr fill_command sl                "ru__main__r)NTrN)NrN)r)2r!rr@r)r5ior_looperr__all__rr,Ir.rrrr#r&r/rrrrrrrprrrrrrrrrrrFrrr%r r!r"r#r0rIrgrurrrrrsb     ' M    ?  : =5#L 5