`dZddlZddlZddlZdZdZd dZGddeZGdd e Z y) zSafe access to git files.NcN tj|y#t$rYywxYw)z1Ensure a directory exists, creating if necessary.N)osmakedirsFileExistsError)dirnames lib/third_party/dulwich/file.pyensure_dir_existsr s%  G    s  $$c tjj|s tj||yddl} |j d|d\}}tj|tj| tj|| tj||tj|y#t$rwxYw#t$rwxYw#t$rwxYw#t$rtj||wxYw)zBRename file with temporary backup file to rollback if rename failsNrz.tmp.)prefixdir) rpathexistsrenameOSErrortempfilemkstempcloseremove)oldnamenewnamerfdtmpfiles r _fancy_renamer$s 77>>' "  IIgw '  ((S(I W   '  '7# '7#IIg3         '7# s/CAC?CC, C  C C),!D cd|vr tdd|vr tdd|vr tdd|vr t|||Stj|||S)aCreate a file object that obeys the git file locking protocol. Returns: a builtin file object or a _GitFile object Note: See _GitFile for a description of the file locking protocol. Only read-only and write-only (binary) modes are supported; r+, w+, and a are not. To read and write from the same file, you can take advantage of the fact that opening a file for write does not actually open the file you request. az'append mode not supported for Git files+z+read/write mode not supported for Git filesbz%text mode not supported for Git filesw)IOError_GitFileioopen)filenamemodebufsizes rGitFiler'Esf d{?@@ d{CDD $=>> d{$00wwxw//c"eZdZdZfdZxZS) FileLockedzFile is already locked.cJ||_||_tt|||yN)r$ lockfilenamesuperr*__init__)selfr$r- __class__s rr/zFileLocked.__init__`s#  ( j$(<@r()__name__ __module__ __qualname____doc__r/ __classcell__)r1s@rr*r*]s!AAr(r*cLeZdZdZegdZdZdZdZdZ dZ dZ d Z y ) r!apFile that follows the git locking protocol for writes. All writes to a file foo will be written into foo.lock in the same directory, and the lockfile will be renamed to overwrite the original file on close. Note: You *must* call close() or abort() on a _GitFile for the lock to be released. Typically this will happen in a finally block. )closedencodingerrorsr%namenewlines softspace) __iter__flushfilenoisattyreadreadline readlinesseektelltruncatewrite writelinesc N||_t|jtr|jdz|_n|jdz|_ t j |jtj tjztjzttddz}t j||||_ d|_|jD]#}t!||t|j|%y#t$rt||jwxYw)Ns.lockz.lockO_BINARYrF) _filename isinstancebytes _lockfilenamerr#O_RDWRO_CREATO_EXCLgetattrrr*fdopen_file_closed PROXY_METHODSsetattr)r0r$r%r&rmethods rr/z_GitFile.__init__s! dnne ,!%(!:D !%'!9D  ;"" BJJ&2WRQ5OOB YYr41  ((F D&'$**f"= >)  ;Xt'9'9: : ;s A"D D$c|jry|jj tj|j d|_y#t $r d|_YywxYw)zClose and discard the lockfile without overwriting the target. If the file is already closed, this is a no-op. NT)rVrUrrrrOFileNotFoundErrorr0s rabortz_GitFile.abortsR <<   IId(( )DL  DL s&AA#"A#c,|jrytj|jj |jj  t tdd+tj|j|jn^tjdk7r+tj|j|jn t|j|j|jy#|jwxYw)a6Close this file, saving the lockfile over the original. Note: If this method fails, it will attempt to delete the lockfile. However, it is not guaranteed to do so (e.g. if a filesystem becomes suddenly read-only), which will prevent future writes to this file until the lockfile is removed manually. Raises: OSError: if the original file could not be overwritten. The lock file is still closed, so further attempts to write to the same file object will raise ValueError. Nreplacewin32)rVrfsyncrUr@rrSr_rOrLsysplatformrrr]r\s rrz_GitFile.closes <<  ""$%  r9d+7 4--t~~><<7*IId00$..A"$"4"4dnnE JJLDJJLs BDDc|Sr,r\s r __enter__z_GitFile.__enter__s r(c$|jyr,)r)r0exc_typeexc_valexc_tbs r__exit__z_GitFile.__exit__s  r(c`||jvrt|j|St|)z,Proxy property calls to the underlying file.)PROXY_PROPERTIESrSrUAttributeError)r0r;s r __getattr__z_GitFile.__getattr__s, 4(( (4::t, ,T""r(N) r2r3r4r5setrmrWr/r]rrfrkrorer(rr!r!fs>   M?&  :#r(r!)rb) r5r"rrbr rr' Exceptionr*objectr!rer(rrus?*  B00AAn#vn#r(