1=head1 NAME 2 3Git - Perl interface to the Git version control system 4 5=cut 6 7 8package Git; 9 10use5.008; 11use strict; 12 13 14BEGIN{ 15 16our($VERSION,@ISA,@EXPORT,@EXPORT_OK); 17 18# Totally unstable API. 19$VERSION='0.01'; 20 21 22=head1 SYNOPSIS 23 24 use Git; 25 26 my $version = Git::command_oneline('version'); 27 28 git_cmd_try { Git::command_noisy('update-server-info') } 29 '%s failed w/ code %d'; 30 31 my $repo = Git->repository (Directory => '/srv/git/cogito.git'); 32 33 34 my @revs = $repo->command('rev-list', '--since=last monday', '--all'); 35 36 my ($fh, $c) = $repo->command_output_pipe('rev-list', '--since=last monday', '--all'); 37 my $lastrev = <$fh>; chomp $lastrev; 38 $repo->command_close_pipe($fh, $c); 39 40 my $lastrev = $repo->command_oneline( [ 'rev-list', '--all' ], 41 STDERR => 0 ); 42 43 my $sha1 = $repo->hash_and_insert_object('file.txt'); 44 my $tempfile = tempfile(); 45 my $size = $repo->cat_blob($sha1, $tempfile); 46 47=cut 48 49 50require Exporter; 51 52@ISA=qw(Exporter); 53 54@EXPORT=qw(git_cmd_try); 55 56# Methods which can be called as standalone functions as well: 57@EXPORT_OK=qw(command command_oneline command_noisy 58 command_output_pipe command_input_pipe command_close_pipe 59 command_bidi_pipe command_close_bidi_pipe 60 version exec_path html_path hash_object git_cmd_try 61 remote_refs prompt 62 get_tz_offset 63 credential credential_read credential_write 64 temp_acquire temp_is_locked temp_release temp_reset temp_path); 65 66 67=head1 DESCRIPTION 68 69This module provides Perl scripts easy way to interface the Git version control 70system. The modules have an easy and well-tested way to call arbitrary Git 71commands; in the future, the interface will also provide specialized methods 72for doing easily operations which are not totally trivial to do over 73the generic command interface. 74 75While some commands can be executed outside of any context (e.g. 'version' 76or 'init'), most operations require a repository context, which in practice 77means getting an instance of the Git object using the repository() constructor. 78(In the future, we will also get a new_repository() constructor.) All commands 79called as methods of the object are then executed in the context of the 80repository. 81 82Part of the "repository state" is also information about path to the attached 83working copy (unless you work with a bare repository). You can also navigate 84inside of the working copy using the C<wc_chdir()> method. (Note that 85the repository object is self-contained and will not change working directory 86of your process.) 87 88TODO: In the future, we might also do 89 90 my $remoterepo = $repo->remote_repository (Name => 'cogito', Branch => 'master'); 91 $remoterepo ||= Git->remote_repository ('http://git.or.cz/cogito.git/'); 92 my @refs = $remoterepo->refs(); 93 94Currently, the module merely wraps calls to external Git tools. In the future, 95it will provide a much faster way to interact with Git by linking directly 96to libgit. This should be completely opaque to the user, though (performance 97increase notwithstanding). 98 99=cut 100 101 102use Carp qw(carp croak);# but croak is bad - throw instead 103use Error qw(:try); 104use Cwd qw(abs_path cwd); 105use IPC::Open2 qw(open2); 106use Fcntl qw(SEEK_SET SEEK_CUR); 107use Time::Local qw(timegm); 108} 109 110 111=head1 CONSTRUCTORS 112 113=over 4 114 115=item repository ( OPTIONS ) 116 117=item repository ( DIRECTORY ) 118 119=item repository () 120 121Construct a new repository object. 122C<OPTIONS> are passed in a hash like fashion, using key and value pairs. 123Possible options are: 124 125B<Repository> - Path to the Git repository. 126 127B<WorkingCopy> - Path to the associated working copy; not strictly required 128as many commands will happily crunch on a bare repository. 129 130B<WorkingSubdir> - Subdirectory in the working copy to work inside. 131Just left undefined if you do not want to limit the scope of operations. 132 133B<Directory> - Path to the Git working directory in its usual setup. 134The C<.git> directory is searched in the directory and all the parent 135directories; if found, C<WorkingCopy> is set to the directory containing 136it and C<Repository> to the C<.git> directory itself. If no C<.git> 137directory was found, the C<Directory> is assumed to be a bare repository, 138C<Repository> is set to point at it and C<WorkingCopy> is left undefined. 139If the C<$GIT_DIR> environment variable is set, things behave as expected 140as well. 141 142You should not use both C<Directory> and either of C<Repository> and 143C<WorkingCopy> - the results of that are undefined. 144 145Alternatively, a directory path may be passed as a single scalar argument 146to the constructor; it is equivalent to setting only the C<Directory> option 147field. 148 149Calling the constructor with no options whatsoever is equivalent to 150calling it with C<< Directory => '.' >>. In general, if you are building 151a standard porcelain command, simply doing C<< Git->repository() >> should 152do the right thing and setup the object to reflect exactly where the user 153is right now. 154 155=cut 156 157sub repository { 158my$class=shift; 159my@args=@_; 160my%opts= (); 161my$self; 162 163if(defined$args[0]) { 164if($#args%2!=1) { 165# Not a hash. 166$#args==0or throw Error::Simple("bad usage"); 167%opts= ( Directory =>$args[0] ); 168}else{ 169%opts=@args; 170} 171} 172 173if(not defined$opts{Repository}and not defined$opts{WorkingCopy} 174and not defined$opts{Directory}) { 175$opts{Directory} ='.'; 176} 177 178if(defined$opts{Directory}) { 179-d $opts{Directory}or throw Error::Simple("Directory not found:$opts{Directory}$!"); 180 181my$search= Git->repository(WorkingCopy =>$opts{Directory}); 182my$dir; 183try{ 184$dir=$search->command_oneline(['rev-parse','--git-dir'], 185 STDERR =>0); 186} catch Git::Error::Command with { 187$dir=undef; 188}; 189 190if($dir) { 191 _verify_require(); 192 File::Spec->file_name_is_absolute($dir)or$dir=$opts{Directory} .'/'.$dir; 193$opts{Repository} = abs_path($dir); 194 195# If --git-dir went ok, this shouldn't die either. 196my$prefix=$search->command_oneline('rev-parse','--show-prefix'); 197$dir= abs_path($opts{Directory}) .'/'; 198if($prefix) { 199if(substr($dir, -length($prefix))ne$prefix) { 200 throw Error::Simple("rev-parse confused me -$dirdoes not have trailing$prefix"); 201} 202substr($dir, -length($prefix)) =''; 203} 204$opts{WorkingCopy} =$dir; 205$opts{WorkingSubdir} =$prefix; 206 207}else{ 208# A bare repository? Let's see... 209$dir=$opts{Directory}; 210 211unless(-d "$dir/refs"and-d "$dir/objects"and-e "$dir/HEAD") { 212# Mimic git-rev-parse --git-dir error message: 213 throw Error::Simple("fatal: Not a git repository:$dir"); 214} 215my$search= Git->repository(Repository =>$dir); 216try{ 217$search->command('symbolic-ref','HEAD'); 218} catch Git::Error::Command with { 219# Mimic git-rev-parse --git-dir error message: 220 throw Error::Simple("fatal: Not a git repository:$dir"); 221} 222 223$opts{Repository} = abs_path($dir); 224} 225 226delete$opts{Directory}; 227} 228 229$self= { opts => \%opts}; 230bless$self,$class; 231} 232 233=back 234 235=head1 METHODS 236 237=over 4 238 239=item command ( COMMAND [, ARGUMENTS... ] ) 240 241=item command ( [ COMMAND, ARGUMENTS... ], { Opt => Val ... } ) 242 243Execute the given Git C<COMMAND> (specify it without the 'git-' 244prefix), optionally with the specified extra C<ARGUMENTS>. 245 246The second more elaborate form can be used if you want to further adjust 247the command execution. Currently, only one option is supported: 248 249B<STDERR> - How to deal with the command's error output. By default (C<undef>) 250it is delivered to the caller's C<STDERR>. A false value (0 or '') will cause 251it to be thrown away. If you want to process it, you can get it in a filehandle 252you specify, but you must be extremely careful; if the error output is not 253very short and you want to read it in the same process as where you called 254C<command()>, you are set up for a nice deadlock! 255 256The method can be called without any instance or on a specified Git repository 257(in that case the command will be run in the repository context). 258 259In scalar context, it returns all the command output in a single string 260(verbatim). 261 262In array context, it returns an array containing lines printed to the 263command's stdout (without trailing newlines). 264 265In both cases, the command's stdin and stderr are the same as the caller's. 266 267=cut 268 269sub command { 270my($fh,$ctx) = command_output_pipe(@_); 271 272if(not defined wantarray) { 273# Nothing to pepper the possible exception with. 274 _cmd_close($ctx,$fh); 275 276}elsif(not wantarray) { 277local$/; 278my$text= <$fh>; 279try{ 280 _cmd_close($ctx,$fh); 281} catch Git::Error::Command with { 282# Pepper with the output: 283my$E=shift; 284$E->{'-outputref'} = \$text; 285 throw $E; 286}; 287return$text; 288 289}else{ 290my@lines= <$fh>; 291defined and chompfor@lines; 292try{ 293 _cmd_close($ctx,$fh); 294} catch Git::Error::Command with { 295my$E=shift; 296$E->{'-outputref'} = \@lines; 297 throw $E; 298}; 299return@lines; 300} 301} 302 303 304=item command_oneline ( COMMAND [, ARGUMENTS... ] ) 305 306=item command_oneline ( [ COMMAND, ARGUMENTS... ], { Opt => Val ... } ) 307 308Execute the given C<COMMAND> in the same way as command() 309does but always return a scalar string containing the first line 310of the command's standard output. 311 312=cut 313 314sub command_oneline { 315my($fh,$ctx) = command_output_pipe(@_); 316 317my$line= <$fh>; 318defined$lineand chomp$line; 319try{ 320 _cmd_close($ctx,$fh); 321} catch Git::Error::Command with { 322# Pepper with the output: 323my$E=shift; 324$E->{'-outputref'} = \$line; 325 throw $E; 326}; 327return$line; 328} 329 330 331=item command_output_pipe ( COMMAND [, ARGUMENTS... ] ) 332 333=item command_output_pipe ( [ COMMAND, ARGUMENTS... ], { Opt => Val ... } ) 334 335Execute the given C<COMMAND> in the same way as command() 336does but return a pipe filehandle from which the command output can be 337read. 338 339The function can return C<($pipe, $ctx)> in array context. 340See C<command_close_pipe()> for details. 341 342=cut 343 344sub command_output_pipe { 345 _command_common_pipe('-|',@_); 346} 347 348 349=item command_input_pipe ( COMMAND [, ARGUMENTS... ] ) 350 351=item command_input_pipe ( [ COMMAND, ARGUMENTS... ], { Opt => Val ... } ) 352 353Execute the given C<COMMAND> in the same way as command_output_pipe() 354does but return an input pipe filehandle instead; the command output 355is not captured. 356 357The function can return C<($pipe, $ctx)> in array context. 358See C<command_close_pipe()> for details. 359 360=cut 361 362sub command_input_pipe { 363 _command_common_pipe('|-',@_); 364} 365 366 367=item command_close_pipe ( PIPE [, CTX ] ) 368 369Close the C<PIPE> as returned from C<command_*_pipe()>, checking 370whether the command finished successfully. The optional C<CTX> argument 371is required if you want to see the command name in the error message, 372and it is the second value returned by C<command_*_pipe()> when 373called in array context. The call idiom is: 374 375 my ($fh, $ctx) = $r->command_output_pipe('status'); 376 while (<$fh>) { ... } 377 $r->command_close_pipe($fh, $ctx); 378 379Note that you should not rely on whatever actually is in C<CTX>; 380currently it is simply the command name but in future the context might 381have more complicated structure. 382 383=cut 384 385sub command_close_pipe { 386my($self,$fh,$ctx) = _maybe_self(@_); 387$ctx||='<unknown>'; 388 _cmd_close($ctx,$fh); 389} 390 391=item command_bidi_pipe ( COMMAND [, ARGUMENTS... ] ) 392 393Execute the given C<COMMAND> in the same way as command_output_pipe() 394does but return both an input pipe filehandle and an output pipe filehandle. 395 396The function will return return C<($pid, $pipe_in, $pipe_out, $ctx)>. 397See C<command_close_bidi_pipe()> for details. 398 399=cut 400 401sub command_bidi_pipe { 402my($pid,$in,$out); 403my($self) = _maybe_self(@_); 404local%ENV=%ENV; 405my$cwd_save=undef; 406if($self) { 407shift; 408$cwd_save= cwd(); 409 _setup_git_cmd_env($self); 410} 411$pid= open2($in,$out,'git',@_); 412chdir($cwd_save)if$cwd_save; 413return($pid,$in,$out,join(' ',@_)); 414} 415 416=item command_close_bidi_pipe ( PID, PIPE_IN, PIPE_OUT [, CTX] ) 417 418Close the C<PIPE_IN> and C<PIPE_OUT> as returned from C<command_bidi_pipe()>, 419checking whether the command finished successfully. The optional C<CTX> 420argument is required if you want to see the command name in the error message, 421and it is the fourth value returned by C<command_bidi_pipe()>. The call idiom 422is: 423 424 my ($pid, $in, $out, $ctx) = $r->command_bidi_pipe('cat-file --batch-check'); 425 print $out "000000000\n"; 426 while (<$in>) { ... } 427 $r->command_close_bidi_pipe($pid, $in, $out, $ctx); 428 429Note that you should not rely on whatever actually is in C<CTX>; 430currently it is simply the command name but in future the context might 431have more complicated structure. 432 433C<PIPE_IN> and C<PIPE_OUT> may be C<undef> if they have been closed prior to 434calling this function. This may be useful in a query-response type of 435commands where caller first writes a query and later reads response, eg: 436 437 my ($pid, $in, $out, $ctx) = $r->command_bidi_pipe('cat-file --batch-check'); 438 print $out "000000000\n"; 439 close $out; 440 while (<$in>) { ... } 441 $r->command_close_bidi_pipe($pid, $in, undef, $ctx); 442 443This idiom may prevent potential dead locks caused by data sent to the output 444pipe not being flushed and thus not reaching the executed command. 445 446=cut 447 448sub command_close_bidi_pipe { 449local$?; 450my($self,$pid,$in,$out,$ctx) = _maybe_self(@_); 451 _cmd_close($ctx, (grep{defined} ($in,$out))); 452waitpid$pid,0; 453if($?>>8) { 454 throw Git::Error::Command($ctx,$?>>8); 455} 456} 457 458 459=item command_noisy ( COMMAND [, ARGUMENTS... ] ) 460 461Execute the given C<COMMAND> in the same way as command() does but do not 462capture the command output - the standard output is not redirected and goes 463to the standard output of the caller application. 464 465While the method is called command_noisy(), you might want to as well use 466it for the most silent Git commands which you know will never pollute your 467stdout but you want to avoid the overhead of the pipe setup when calling them. 468 469The function returns only after the command has finished running. 470 471=cut 472 473sub command_noisy { 474my($self,$cmd,@args) = _maybe_self(@_); 475 _check_valid_cmd($cmd); 476 477my$pid=fork; 478if(not defined$pid) { 479 throw Error::Simple("fork failed:$!"); 480}elsif($pid==0) { 481 _cmd_exec($self,$cmd,@args); 482} 483if(waitpid($pid,0) >0and$?>>8!=0) { 484 throw Git::Error::Command(join(' ',$cmd,@args),$?>>8); 485} 486} 487 488 489=item version () 490 491Return the Git version in use. 492 493=cut 494 495sub version { 496my$verstr= command_oneline('--version'); 497$verstr=~s/^git version //; 498$verstr; 499} 500 501 502=item exec_path () 503 504Return path to the Git sub-command executables (the same as 505C<git --exec-path>). Useful mostly only internally. 506 507=cut 508 509sub exec_path { command_oneline('--exec-path') } 510 511 512=item html_path () 513 514Return path to the Git html documentation (the same as 515C<git --html-path>). Useful mostly only internally. 516 517=cut 518 519sub html_path { command_oneline('--html-path') } 520 521 522=item get_tz_offset ( TIME ) 523 524Return the time zone offset from GMT in the form +/-HHMM where HH is 525the number of hours from GMT and MM is the number of minutes. This is 526the equivalent of what strftime("%z", ...) would provide on a GNU 527platform. 528 529If TIME is not supplied, the current local time is used. 530 531=cut 532 533sub get_tz_offset { 534# some systmes don't handle or mishandle %z, so be creative. 535my$t=shift||time; 536my$gm= timegm(localtime($t)); 537my$sign=qw( + + - )[$gm<=>$t]; 538returnsprintf("%s%02d%02d",$sign, (gmtime(abs($t-$gm)))[2,1]); 539} 540 541 542=item prompt ( PROMPT , ISPASSWORD ) 543 544Query user C<PROMPT> and return answer from user. 545 546Honours GIT_ASKPASS and SSH_ASKPASS environment variables for querying 547the user. If no *_ASKPASS variable is set or an error occoured, 548the terminal is tried as a fallback. 549If C<ISPASSWORD> is set and true, the terminal disables echo. 550 551=cut 552 553sub prompt { 554my($prompt,$isPassword) =@_; 555my$ret; 556if(exists$ENV{'GIT_ASKPASS'}) { 557$ret= _prompt($ENV{'GIT_ASKPASS'},$prompt); 558} 559if(!defined$ret&&exists$ENV{'SSH_ASKPASS'}) { 560$ret= _prompt($ENV{'SSH_ASKPASS'},$prompt); 561} 562if(!defined$ret) { 563print STDERR $prompt; 564 STDERR->flush; 565if(defined$isPassword&&$isPassword) { 566require Term::ReadKey; 567 Term::ReadKey::ReadMode('noecho'); 568$ret=''; 569while(defined(my$key= Term::ReadKey::ReadKey(0))) { 570last if$key=~/[\012\015]/;# \n\r 571$ret.=$key; 572} 573 Term::ReadKey::ReadMode('restore'); 574print STDERR "\n"; 575 STDERR->flush; 576}else{ 577chomp($ret= <STDIN>); 578} 579} 580return$ret; 581} 582 583sub _prompt { 584my($askpass,$prompt) =@_; 585return unlesslength$askpass; 586$prompt=~s/\n/ /g; 587my$ret; 588open my$fh,"-|",$askpass,$promptorreturn; 589$ret= <$fh>; 590$ret=~s/[\015\012]//g;# strip \r\n, chomp does not work on all systems (i.e. windows) as expected 591close($fh); 592return$ret; 593} 594 595=item repo_path () 596 597Return path to the git repository. Must be called on a repository instance. 598 599=cut 600 601sub repo_path {$_[0]->{opts}->{Repository} } 602 603 604=item wc_path () 605 606Return path to the working copy. Must be called on a repository instance. 607 608=cut 609 610sub wc_path {$_[0]->{opts}->{WorkingCopy} } 611 612 613=item wc_subdir () 614 615Return path to the subdirectory inside of a working copy. Must be called 616on a repository instance. 617 618=cut 619 620sub wc_subdir {$_[0]->{opts}->{WorkingSubdir} ||=''} 621 622 623=item wc_chdir ( SUBDIR ) 624 625Change the working copy subdirectory to work within. The C<SUBDIR> is 626relative to the working copy root directory (not the current subdirectory). 627Must be called on a repository instance attached to a working copy 628and the directory must exist. 629 630=cut 631 632sub wc_chdir { 633my($self,$subdir) =@_; 634$self->wc_path() 635or throw Error::Simple("bare repository"); 636 637-d $self->wc_path().'/'.$subdir 638or throw Error::Simple("subdir not found:$subdir$!"); 639# Of course we will not "hold" the subdirectory so anyone 640# can delete it now and we will never know. But at least we tried. 641 642$self->{opts}->{WorkingSubdir} =$subdir; 643} 644 645 646=item config ( VARIABLE ) 647 648Retrieve the configuration C<VARIABLE> in the same manner as C<config> 649does. In scalar context requires the variable to be set only one time 650(exception is thrown otherwise), in array context returns allows the 651variable to be set multiple times and returns all the values. 652 653=cut 654 655sub config { 656return _config_common({},@_); 657} 658 659 660=item config_bool ( VARIABLE ) 661 662Retrieve the bool configuration C<VARIABLE>. The return value 663is usable as a boolean in perl (and C<undef> if it's not defined, 664of course). 665 666=cut 667 668sub config_bool { 669my$val=scalar _config_common({'kind'=>'--bool'},@_); 670 671# Do not rewrite this as return (defined $val && $val eq 'true') 672# as some callers do care what kind of falsehood they receive. 673if(!defined$val) { 674returnundef; 675}else{ 676return$valeq'true'; 677} 678} 679 680 681=item config_path ( VARIABLE ) 682 683Retrieve the path configuration C<VARIABLE>. The return value 684is an expanded path or C<undef> if it's not defined. 685 686=cut 687 688sub config_path { 689return _config_common({'kind'=>'--path'},@_); 690} 691 692 693=item config_int ( VARIABLE ) 694 695Retrieve the integer configuration C<VARIABLE>. The return value 696is simple decimal number. An optional value suffix of 'k', 'm', 697or 'g' in the config file will cause the value to be multiplied 698by 1024, 1048576 (1024^2), or 1073741824 (1024^3) prior to output. 699It would return C<undef> if configuration variable is not defined. 700 701=cut 702 703sub config_int { 704returnscalar _config_common({'kind'=>'--int'},@_); 705} 706 707# Common subroutine to implement bulk of what the config* family of methods 708# do. This currently wraps command('config') so it is not so fast. 709sub _config_common { 710my($opts) =shift@_; 711my($self,$var) = _maybe_self(@_); 712 713try{ 714my@cmd= ('config',$opts->{'kind'} ?$opts->{'kind'} : ()); 715unshift@cmd,$selfif$self; 716if(wantarray) { 717return command(@cmd,'--get-all',$var); 718}else{ 719return command_oneline(@cmd,'--get',$var); 720} 721} catch Git::Error::Command with { 722my$E=shift; 723if($E->value() ==1) { 724# Key not found. 725return; 726}else{ 727 throw $E; 728} 729}; 730} 731 732=item get_colorbool ( NAME ) 733 734Finds if color should be used for NAMEd operation from the configuration, 735and returns boolean (true for "use color", false for "do not use color"). 736 737=cut 738 739sub get_colorbool { 740my($self,$var) =@_; 741my$stdout_to_tty= (-t STDOUT) ?"true":"false"; 742my$use_color=$self->command_oneline('config','--get-colorbool', 743$var,$stdout_to_tty); 744return($use_coloreq'true'); 745} 746 747=item get_color ( SLOT, COLOR ) 748 749Finds color for SLOT from the configuration, while defaulting to COLOR, 750and returns the ANSI color escape sequence: 751 752 print $repo->get_color("color.interactive.prompt", "underline blue white"); 753 print "some text"; 754 print $repo->get_color("", "normal"); 755 756=cut 757 758sub get_color { 759my($self,$slot,$default) =@_; 760my$color=$self->command_oneline('config','--get-color',$slot,$default); 761if(!defined$color) { 762$color=""; 763} 764return$color; 765} 766 767=item remote_refs ( REPOSITORY [, GROUPS [, REFGLOBS ] ] ) 768 769This function returns a hashref of refs stored in a given remote repository. 770The hash is in the format C<refname =\> hash>. For tags, the C<refname> entry 771contains the tag object while a C<refname^{}> entry gives the tagged objects. 772 773C<REPOSITORY> has the same meaning as the appropriate C<git-ls-remote> 774argument; either a URL or a remote name (if called on a repository instance). 775C<GROUPS> is an optional arrayref that can contain 'tags' to return all the 776tags and/or 'heads' to return all the heads. C<REFGLOB> is an optional array 777of strings containing a shell-like glob to further limit the refs returned in 778the hash; the meaning is again the same as the appropriate C<git-ls-remote> 779argument. 780 781This function may or may not be called on a repository instance. In the former 782case, remote names as defined in the repository are recognized as repository 783specifiers. 784 785=cut 786 787sub remote_refs { 788my($self,$repo,$groups,$refglobs) = _maybe_self(@_); 789my@args; 790if(ref$groupseq'ARRAY') { 791foreach(@$groups) { 792if($_eq'heads') { 793push(@args,'--heads'); 794}elsif($_eq'tags') { 795push(@args,'--tags'); 796}else{ 797# Ignore unknown groups for future 798# compatibility 799} 800} 801} 802push(@args,$repo); 803if(ref$refglobseq'ARRAY') { 804push(@args,@$refglobs); 805} 806 807my@self=$self? ($self) : ();# Ultra trickery 808my($fh,$ctx) = Git::command_output_pipe(@self,'ls-remote',@args); 809my%refs; 810while(<$fh>) { 811chomp; 812my($hash,$ref) =split(/\t/,$_,2); 813$refs{$ref} =$hash; 814} 815 Git::command_close_pipe(@self,$fh,$ctx); 816return \%refs; 817} 818 819 820=item ident ( TYPE | IDENTSTR ) 821 822=item ident_person ( TYPE | IDENTSTR | IDENTARRAY ) 823 824This suite of functions retrieves and parses ident information, as stored 825in the commit and tag objects or produced by C<var GIT_type_IDENT> (thus 826C<TYPE> can be either I<author> or I<committer>; case is insignificant). 827 828The C<ident> method retrieves the ident information from C<git var> 829and either returns it as a scalar string or as an array with the fields parsed. 830Alternatively, it can take a prepared ident string (e.g. from the commit 831object) and just parse it. 832 833C<ident_person> returns the person part of the ident - name and email; 834it can take the same arguments as C<ident> or the array returned by C<ident>. 835 836The synopsis is like: 837 838 my ($name, $email, $time_tz) = ident('author'); 839 "$name <$email>" eq ident_person('author'); 840 "$name <$email>" eq ident_person($name); 841 $time_tz =~ /^\d+ [+-]\d{4}$/; 842 843=cut 844 845sub ident { 846my($self,$type) = _maybe_self(@_); 847my$identstr; 848if(lc$typeeq lc'committer'or lc$typeeq lc'author') { 849my@cmd= ('var','GIT_'.uc($type).'_IDENT'); 850unshift@cmd,$selfif$self; 851$identstr= command_oneline(@cmd); 852}else{ 853$identstr=$type; 854} 855if(wantarray) { 856return$identstr=~/^(.*) <(.*)> (\d+ [+-]\d{4})$/; 857}else{ 858return$identstr; 859} 860} 861 862sub ident_person { 863my($self,@ident) = _maybe_self(@_); 864$#ident==0and@ident=$self?$self->ident($ident[0]) : ident($ident[0]); 865return"$ident[0] <$ident[1]>"; 866} 867 868=item parse_mailboxes 869 870Return an array of mailboxes extracted from a string. 871 872=cut 873 874sub parse_mailboxes { 875my$re_comment=qr/\((?:[^)]*)\)/; 876my$re_quote=qr/"(?:[^\"\\]|\\.)*"/; 877my$re_word=qr/(?:[^]["\s()<>:;@\\,.]|\\.)+/; 878 879# divide the string in tokens of the above form 880my$re_token=qr/(?:$re_quote|$re_word|$re_comment|\S)/; 881my@tokens=map{$_=~/\s*($re_token)\s*/g}@_; 882 883# add a delimiter to simplify treatment for the last mailbox 884push@tokens,","; 885 886my(@addr_list,@phrase,@address,@comment,@buffer) = (); 887foreachmy$token(@tokens) { 888if($token=~/^[,;]$/) { 889# if buffer still contains undeterminated strings 890# append it at the end of @address or @phrase 891if(@address) { 892push@address,@buffer; 893}else{ 894push@phrase,@buffer; 895} 896 897my$str_phrase=join' ',@phrase; 898my$str_address=join'',@address; 899my$str_comment=join' ',@comment; 900 901# quote are necessary if phrase contains 902# special characters 903if($str_phrase=~/[][()<>:;@\\,.\000-\037\177]/) { 904$str_phrase=~s/(^|[^\\])"/$1/g; 905$str_phrase=qq["$str_phrase"]; 906} 907 908# add "<>" around the address if necessary 909if($str_addressne""&&$str_phrasene"") { 910$str_address=qq[<$str_address>]; 911} 912 913my$str_mailbox="$str_phrase$str_address$str_comment"; 914$str_mailbox=~s/^\s*|\s*$//g; 915push@addr_list,$str_mailboxif($str_mailbox); 916 917@phrase=@address=@comment=@buffer= (); 918}elsif($token=~/^\(/) { 919push@comment,$token; 920}elsif($tokeneq"<") { 921push@phrase, (splice@address), (splice@buffer); 922}elsif($tokeneq">") { 923push@address, (splice@buffer); 924}elsif($tokeneq"@") { 925push@address, (splice@buffer),"@"; 926}elsif($tokeneq".") { 927push@address, (splice@buffer),"."; 928}else{ 929push@buffer,$token; 930} 931} 932 933return@addr_list; 934} 935 936=item hash_object ( TYPE, FILENAME ) 937 938Compute the SHA1 object id of the given C<FILENAME> considering it is 939of the C<TYPE> object type (C<blob>, C<commit>, C<tree>). 940 941The method can be called without any instance or on a specified Git repository, 942it makes zero difference. 943 944The function returns the SHA1 hash. 945 946=cut 947 948# TODO: Support for passing FILEHANDLE instead of FILENAME 949sub hash_object { 950my($self,$type,$file) = _maybe_self(@_); 951 command_oneline('hash-object','-t',$type,$file); 952} 953 954 955=item hash_and_insert_object ( FILENAME ) 956 957Compute the SHA1 object id of the given C<FILENAME> and add the object to the 958object database. 959 960The function returns the SHA1 hash. 961 962=cut 963 964# TODO: Support for passing FILEHANDLE instead of FILENAME 965sub hash_and_insert_object { 966my($self,$filename) =@_; 967 968 carp "Bad filename\"$filename\""if$filename=~/[\r\n]/; 969 970$self->_open_hash_and_insert_object_if_needed(); 971my($in,$out) = ($self->{hash_object_in},$self->{hash_object_out}); 972 973unless(print$out $filename,"\n") { 974$self->_close_hash_and_insert_object(); 975 throw Error::Simple("out pipe went bad"); 976} 977 978chomp(my$hash= <$in>); 979unless(defined($hash)) { 980$self->_close_hash_and_insert_object(); 981 throw Error::Simple("in pipe went bad"); 982} 983 984return$hash; 985} 986 987sub _open_hash_and_insert_object_if_needed { 988my($self) =@_; 989 990return ifdefined($self->{hash_object_pid}); 991 992($self->{hash_object_pid},$self->{hash_object_in}, 993$self->{hash_object_out},$self->{hash_object_ctx}) = 994$self->command_bidi_pipe(qw(hash-object -w --stdin-paths --no-filters)); 995} 996 997sub _close_hash_and_insert_object { 998my($self) =@_; 9991000return unlessdefined($self->{hash_object_pid});10011002my@vars=map{'hash_object_'.$_}qw(pid in out ctx);10031004 command_close_bidi_pipe(@$self{@vars});1005delete@$self{@vars};1006}10071008=item cat_blob ( SHA1, FILEHANDLE )10091010Prints the contents of the blob identified by C<SHA1> to C<FILEHANDLE> and1011returns the number of bytes printed.10121013=cut10141015sub cat_blob {1016my($self,$sha1,$fh) =@_;10171018$self->_open_cat_blob_if_needed();1019my($in,$out) = ($self->{cat_blob_in},$self->{cat_blob_out});10201021unless(print$out $sha1,"\n") {1022$self->_close_cat_blob();1023 throw Error::Simple("out pipe went bad");1024}10251026my$description= <$in>;1027if($description=~/ missing$/) {1028 carp "$sha1doesn't exist in the repository";1029return-1;1030}10311032if($description!~/^[0-9a-fA-F]{40} \S+ (\d+)$/) {1033 carp "Unexpected result returned from git cat-file";1034return-1;1035}10361037my$size=$1;10381039my$blob;1040my$bytesLeft=$size;10411042while(1) {1043last unless$bytesLeft;10441045my$bytesToRead=$bytesLeft<1024?$bytesLeft:1024;1046my$read=read($in,$blob,$bytesToRead);1047unless(defined($read)) {1048$self->_close_cat_blob();1049 throw Error::Simple("in pipe went bad");1050}1051unless(print$fh $blob) {1052$self->_close_cat_blob();1053 throw Error::Simple("couldn't write to passed in filehandle");1054}1055$bytesLeft-=$read;1056}10571058# Skip past the trailing newline.1059my$newline;1060my$read=read($in,$newline,1);1061unless(defined($read)) {1062$self->_close_cat_blob();1063 throw Error::Simple("in pipe went bad");1064}1065unless($read==1&&$newlineeq"\n") {1066$self->_close_cat_blob();1067 throw Error::Simple("didn't find newline after blob");1068}10691070return$size;1071}10721073sub _open_cat_blob_if_needed {1074my($self) =@_;10751076return ifdefined($self->{cat_blob_pid});10771078($self->{cat_blob_pid},$self->{cat_blob_in},1079$self->{cat_blob_out},$self->{cat_blob_ctx}) =1080$self->command_bidi_pipe(qw(cat-file --batch));1081}10821083sub _close_cat_blob {1084my($self) =@_;10851086return unlessdefined($self->{cat_blob_pid});10871088my@vars=map{'cat_blob_'.$_}qw(pid in out ctx);10891090 command_close_bidi_pipe(@$self{@vars});1091delete@$self{@vars};1092}109310941095=item credential_read( FILEHANDLE )10961097Reads credential key-value pairs from C<FILEHANDLE>. Reading stops at EOF or1098when an empty line is encountered. Each line must be of the form C<key=value>1099with a non-empty key. Function returns hash with all read values. Any white1100space (other than new-line character) is preserved.11011102=cut11031104sub credential_read {1105my($self,$reader) = _maybe_self(@_);1106my%credential;1107while(<$reader>) {1108chomp;1109if($_eq'') {1110last;1111}elsif(!/^([^=]+)=(.*)$/) {1112 throw Error::Simple("unable to parse git credential data:\n$_");1113}1114$credential{$1} =$2;1115}1116return%credential;1117}11181119=item credential_write( FILEHANDLE, CREDENTIAL_HASHREF )11201121Writes credential key-value pairs from hash referenced by1122C<CREDENTIAL_HASHREF> to C<FILEHANDLE>. Keys and values cannot contain1123new-lines or NUL bytes characters, and key cannot contain equal signs nor be1124empty (if they do Error::Simple is thrown). Any white space is preserved. If1125value for a key is C<undef>, it will be skipped.11261127If C<'url'> key exists it will be written first. (All the other key-value1128pairs are written in sorted order but you should not depend on that). Once1129all lines are written, an empty line is printed.11301131=cut11321133sub credential_write {1134my($self,$writer,$credential) = _maybe_self(@_);1135my($key,$value);11361137# Check if $credential is valid prior to writing anything1138while(($key,$value) =each%$credential) {1139if(!defined$key|| !length$key) {1140 throw Error::Simple("credential key empty or undefined");1141}elsif($key=~/[=\n\0]/) {1142 throw Error::Simple("credential key contains invalid characters:$key");1143}elsif(defined$value&&$value=~/[\n\0]/) {1144 throw Error::Simple("credential value for key=$keycontains invalid characters:$value");1145}1146}11471148for$key(sort{1149# url overwrites other fields, so it must come first1150return-1if$aeq'url';1151return1if$beq'url';1152return$acmp$b;1153}keys%$credential) {1154if(defined$credential->{$key}) {1155print$writer $key,'=',$credential->{$key},"\n";1156}1157}1158print$writer"\n";1159}11601161sub _credential_run {1162my($self,$credential,$op) = _maybe_self(@_);1163my($pid,$reader,$writer,$ctx) = command_bidi_pipe('credential',$op);11641165 credential_write $writer,$credential;1166close$writer;11671168if($opeq"fill") {1169%$credential= credential_read $reader;1170}1171if(<$reader>) {1172 throw Error::Simple("unexpected output from git credential$opresponse:\n$_\n");1173}11741175 command_close_bidi_pipe($pid,$reader,undef,$ctx);1176}11771178=item credential( CREDENTIAL_HASHREF [, OPERATION ] )11791180=item credential( CREDENTIAL_HASHREF, CODE )11811182Executes C<git credential> for a given set of credentials and specified1183operation. In both forms C<CREDENTIAL_HASHREF> needs to be a reference to1184a hash which stores credentials. Under certain conditions the hash can1185change.11861187In the first form, C<OPERATION> can be C<'fill'>, C<'approve'> or C<'reject'>,1188and function will execute corresponding C<git credential> sub-command. If1189it's omitted C<'fill'> is assumed. In case of C<'fill'> the values stored in1190C<CREDENTIAL_HASHREF> will be changed to the ones returned by the C<git1191credential fill> command. The usual usage would look something like:11921193 my %cred = (1194 'protocol' => 'https',1195 'host' => 'example.com',1196 'username' => 'bob'1197 );1198 Git::credential \%cred;1199 if (try_to_authenticate($cred{'username'}, $cred{'password'})) {1200 Git::credential \%cred, 'approve';1201 ... do more stuff ...1202 } else {1203 Git::credential \%cred, 'reject';1204 }12051206In the second form, C<CODE> needs to be a reference to a subroutine. The1207function will execute C<git credential fill> to fill the provided credential1208hash, then call C<CODE> with C<CREDENTIAL_HASHREF> as the sole argument. If1209C<CODE>'s return value is defined, the function will execute C<git credential1210approve> (if return value yields true) or C<git credential reject> (if return1211value is false). If the return value is undef, nothing at all is executed;1212this is useful, for example, if the credential could neither be verified nor1213rejected due to an unrelated network error. The return value is the same as1214what C<CODE> returns. With this form, the usage might look as follows:12151216 if (Git::credential {1217 'protocol' => 'https',1218 'host' => 'example.com',1219 'username' => 'bob'1220 }, sub {1221 my $cred = shift;1222 return !!try_to_authenticate($cred->{'username'},1223 $cred->{'password'});1224 }) {1225 ... do more stuff ...1226 }12271228=cut12291230sub credential {1231my($self,$credential,$op_or_code) = (_maybe_self(@_),'fill');12321233if('CODE'eq ref$op_or_code) {1234 _credential_run $credential,'fill';1235my$ret=$op_or_code->($credential);1236if(defined$ret) {1237 _credential_run $credential,$ret?'approve':'reject';1238}1239return$ret;1240}else{1241 _credential_run $credential,$op_or_code;1242}1243}12441245{# %TEMP_* Lexical Context12461247my(%TEMP_FILEMAP,%TEMP_FILES);12481249=item temp_acquire ( NAME )12501251Attempts to retrieve the temporary file mapped to the string C<NAME>. If an1252associated temp file has not been created this session or was closed, it is1253created, cached, and set for autoflush and binmode.12541255Internally locks the file mapped to C<NAME>. This lock must be released with1256C<temp_release()> when the temp file is no longer needed. Subsequent attempts1257to retrieve temporary files mapped to the same C<NAME> while still locked will1258cause an error. This locking mechanism provides a weak guarantee and is not1259threadsafe. It does provide some error checking to help prevent temp file refs1260writing over one another.12611262In general, the L<File::Handle> returned should not be closed by consumers as1263it defeats the purpose of this caching mechanism. If you need to close the temp1264file handle, then you should use L<File::Temp> or another temp file faculty1265directly. If a handle is closed and then requested again, then a warning will1266issue.12671268=cut12691270sub temp_acquire {1271my$temp_fd= _temp_cache(@_);12721273$TEMP_FILES{$temp_fd}{locked} =1;1274$temp_fd;1275}12761277=item temp_is_locked ( NAME )12781279Returns true if the internal lock created by a previous C<temp_acquire()>1280call with C<NAME> is still in effect.12811282When temp_acquire is called on a C<NAME>, it internally locks the temporary1283file mapped to C<NAME>. That lock will not be released until C<temp_release()>1284is called with either the original C<NAME> or the L<File::Handle> that was1285returned from the original call to temp_acquire.12861287Subsequent attempts to call C<temp_acquire()> with the same C<NAME> will fail1288unless there has been an intervening C<temp_release()> call for that C<NAME>1289(or its corresponding L<File::Handle> that was returned by the original1290C<temp_acquire()> call).12911292If true is returned by C<temp_is_locked()> for a C<NAME>, an attempt to1293C<temp_acquire()> the same C<NAME> will cause an error unless1294C<temp_release> is first called on that C<NAME> (or its corresponding1295L<File::Handle> that was returned by the original C<temp_acquire()> call).12961297=cut12981299sub temp_is_locked {1300my($self,$name) = _maybe_self(@_);1301my$temp_fd= \$TEMP_FILEMAP{$name};13021303defined$$temp_fd&&$$temp_fd->opened&&$TEMP_FILES{$$temp_fd}{locked};1304}13051306=item temp_release ( NAME )13071308=item temp_release ( FILEHANDLE )13091310Releases a lock acquired through C<temp_acquire()>. Can be called either with1311the C<NAME> mapping used when acquiring the temp file or with the C<FILEHANDLE>1312referencing a locked temp file.13131314Warns if an attempt is made to release a file that is not locked.13151316The temp file will be truncated before being released. This can help to reduce1317disk I/O where the system is smart enough to detect the truncation while data1318is in the output buffers. Beware that after the temp file is released and1319truncated, any operations on that file may fail miserably until it is1320re-acquired. All contents are lost between each release and acquire mapped to1321the same string.13221323=cut13241325sub temp_release {1326my($self,$temp_fd,$trunc) = _maybe_self(@_);13271328if(exists$TEMP_FILEMAP{$temp_fd}) {1329$temp_fd=$TEMP_FILES{$temp_fd};1330}1331unless($TEMP_FILES{$temp_fd}{locked}) {1332 carp "Attempt to release temp file '",1333$temp_fd,"' that has not been locked";1334}1335 temp_reset($temp_fd)if$truncand$temp_fd->opened;13361337$TEMP_FILES{$temp_fd}{locked} =0;1338undef;1339}13401341sub _temp_cache {1342my($self,$name) = _maybe_self(@_);13431344 _verify_require();13451346my$temp_fd= \$TEMP_FILEMAP{$name};1347if(defined$$temp_fdand$$temp_fd->opened) {1348if($TEMP_FILES{$$temp_fd}{locked}) {1349 throw Error::Simple("Temp file with moniker '".1350$name."' already in use");1351}1352}else{1353if(defined$$temp_fd) {1354# then we're here because of a closed handle.1355 carp "Temp file '",$name,1356"' was closed. Opening replacement.";1357}1358my$fname;13591360my$tmpdir;1361if(defined$self) {1362$tmpdir=$self->repo_path();1363}13641365my$n=$name;1366$n=~s/\W/_/g;# no strange chars13671368($$temp_fd,$fname) = File::Temp::tempfile(1369"Git_${n}_XXXXXX", UNLINK =>1, DIR =>$tmpdir,1370)or throw Error::Simple("couldn't open new temp file");13711372$$temp_fd->autoflush;1373binmode$$temp_fd;1374$TEMP_FILES{$$temp_fd}{fname} =$fname;1375}1376$$temp_fd;1377}13781379sub _verify_require {1380eval{require File::Temp;require File::Spec; };1381$@and throw Error::Simple($@);1382}13831384=item temp_reset ( FILEHANDLE )13851386Truncates and resets the position of the C<FILEHANDLE>.13871388=cut13891390sub temp_reset {1391my($self,$temp_fd) = _maybe_self(@_);13921393truncate$temp_fd,01394or throw Error::Simple("couldn't truncate file");1395sysseek($temp_fd,0, SEEK_SET)and seek($temp_fd,0, SEEK_SET)1396or throw Error::Simple("couldn't seek to beginning of file");1397sysseek($temp_fd,0, SEEK_CUR) ==0and tell($temp_fd) ==01398or throw Error::Simple("expected file position to be reset");1399}14001401=item temp_path ( NAME )14021403=item temp_path ( FILEHANDLE )14041405Returns the filename associated with the given tempfile.14061407=cut14081409sub temp_path {1410my($self,$temp_fd) = _maybe_self(@_);14111412if(exists$TEMP_FILEMAP{$temp_fd}) {1413$temp_fd=$TEMP_FILEMAP{$temp_fd};1414}1415$TEMP_FILES{$temp_fd}{fname};1416}14171418sub END{1419unlink values%TEMP_FILEMAPif%TEMP_FILEMAP;1420}14211422}# %TEMP_* Lexical Context14231424=back14251426=head1 ERROR HANDLING14271428All functions are supposed to throw Perl exceptions in case of errors.1429See the L<Error> module on how to catch those. Most exceptions are mere1430L<Error::Simple> instances.14311432However, the C<command()>, C<command_oneline()> and C<command_noisy()>1433functions suite can throw C<Git::Error::Command> exceptions as well: those are1434thrown when the external command returns an error code and contain the error1435code as well as access to the captured command's output. The exception class1436provides the usual C<stringify> and C<value> (command's exit code) methods and1437in addition also a C<cmd_output> method that returns either an array or a1438string with the captured command output (depending on the original function1439call context; C<command_noisy()> returns C<undef>) and $<cmdline> which1440returns the command and its arguments (but without proper quoting).14411442Note that the C<command_*_pipe()> functions cannot throw this exception since1443it has no idea whether the command failed or not. You will only find out1444at the time you C<close> the pipe; if you want to have that automated,1445use C<command_close_pipe()>, which can throw the exception.14461447=cut14481449{1450package Git::Error::Command;14511452@Git::Error::Command::ISA =qw(Error);14531454sub new {1455my$self=shift;1456my$cmdline=''.shift;1457my$value=0+shift;1458my$outputref=shift;1459my(@args) = ();14601461local$Error::Depth =$Error::Depth +1;14621463push(@args,'-cmdline',$cmdline);1464push(@args,'-value',$value);1465push(@args,'-outputref',$outputref);14661467$self->SUPER::new(-text =>'command returned error',@args);1468}14691470sub stringify {1471my$self=shift;1472my$text=$self->SUPER::stringify;1473$self->cmdline() .': '.$text.': '.$self->value() ."\n";1474}14751476sub cmdline {1477my$self=shift;1478$self->{'-cmdline'};1479}14801481sub cmd_output {1482my$self=shift;1483my$ref=$self->{'-outputref'};1484defined$refor undef;1485if(ref$refeq'ARRAY') {1486return@$ref;1487}else{# SCALAR1488return$$ref;1489}1490}1491}14921493=over 414941495=item git_cmd_try { CODE } ERRMSG14961497This magical statement will automatically catch any C<Git::Error::Command>1498exceptions thrown by C<CODE> and make your program die with C<ERRMSG>1499on its lips; the message will have %s substituted for the command line1500and %d for the exit status. This statement is useful mostly for producing1501more user-friendly error messages.15021503In case of no exception caught the statement returns C<CODE>'s return value.15041505Note that this is the only auto-exported function.15061507=cut15081509sub git_cmd_try(&$) {1510my($code,$errmsg) =@_;1511my@result;1512my$err;1513my$array=wantarray;1514try{1515if($array) {1516@result= &$code;1517}else{1518$result[0] = &$code;1519}1520} catch Git::Error::Command with {1521my$E=shift;1522$err=$errmsg;1523$err=~s/\%s/$E->cmdline()/ge;1524$err=~s/\%d/$E->value()/ge;1525# We can't croak here since Error.pm would mangle1526# that to Error::Simple.1527};1528$errand croak $err;1529return$array?@result:$result[0];1530}153115321533=back15341535=head1 COPYRIGHT15361537Copyright 2006 by Petr Baudis E<lt>pasky@suse.czE<gt>.15381539This module is free software; it may be used, copied, modified1540and distributed under the terms of the GNU General Public Licence,1541either version 2, or (at your option) any later version.15421543=cut154415451546# Take raw method argument list and return ($obj, @args) in case1547# the method was called upon an instance and (undef, @args) if1548# it was called directly.1549sub _maybe_self {1550 UNIVERSAL::isa($_[0],'Git') ?@_: (undef,@_);1551}15521553# Check if the command id is something reasonable.1554sub _check_valid_cmd {1555my($cmd) =@_;1556$cmd=~/^[a-z0-9A-Z_-]+$/or throw Error::Simple("bad command:$cmd");1557}15581559# Common backend for the pipe creators.1560sub _command_common_pipe {1561my$direction=shift;1562my($self,@p) = _maybe_self(@_);1563my(%opts,$cmd,@args);1564if(ref$p[0]) {1565($cmd,@args) = @{shift@p};1566%opts=ref$p[0] ? %{$p[0]} :@p;1567}else{1568($cmd,@args) =@p;1569}1570 _check_valid_cmd($cmd);15711572my$fh;1573if($^Oeq'MSWin32') {1574# ActiveState Perl1575#defined $opts{STDERR} and1576# warn 'ignoring STDERR option - running w/ ActiveState';1577$directioneq'-|'or1578die'input pipe for ActiveState not implemented';1579# the strange construction with *ACPIPE is just to1580# explain the tie below that we want to bind to1581# a handle class, not scalar. It is not known if1582# it is something specific to ActiveState Perl or1583# just a Perl quirk.1584 tie (*ACPIPE,'Git::activestate_pipe',$cmd,@args);1585$fh= *ACPIPE;15861587}else{1588my$pid=open($fh,$direction);1589if(not defined$pid) {1590 throw Error::Simple("open failed:$!");1591}elsif($pid==0) {1592if($opts{STDERR}) {1593open(STDERR,'>&',$opts{STDERR})1594or die"dup failed:$!";1595}elsif(defined$opts{STDERR}) {1596open(STDERR,'>','/dev/null')1597or die"opening /dev/null failed:$!";1598}1599 _cmd_exec($self,$cmd,@args);1600}1601}1602returnwantarray? ($fh,join(' ',$cmd,@args)) :$fh;1603}16041605# When already in the subprocess, set up the appropriate state1606# for the given repository and execute the git command.1607sub _cmd_exec {1608my($self,@args) =@_;1609 _setup_git_cmd_env($self);1610 _execv_git_cmd(@args);1611dieqq[exec "@args" failed:$!];1612}16131614# set up the appropriate state for git command1615sub _setup_git_cmd_env {1616my$self=shift;1617if($self) {1618$self->repo_path()and$ENV{'GIT_DIR'} =$self->repo_path();1619$self->repo_path()and$self->wc_path()1620and$ENV{'GIT_WORK_TREE'} =$self->wc_path();1621$self->wc_path()and chdir($self->wc_path());1622$self->wc_subdir()and chdir($self->wc_subdir());1623}1624}16251626# Execute the given Git command ($_[0]) with arguments ($_[1..])1627# by searching for it at proper places.1628sub _execv_git_cmd {exec('git',@_); }16291630# Close pipe to a subprocess.1631sub _cmd_close {1632my$ctx=shift@_;1633foreachmy$fh(@_) {1634if(close$fh) {1635# nop1636}elsif($!) {1637# It's just close, no point in fatalities1638 carp "error closing pipe:$!";1639}elsif($?>>8) {1640# The caller should pepper this.1641 throw Git::Error::Command($ctx,$?>>8);1642}1643# else we might e.g. closed a live stream; the command1644# dying of SIGPIPE would drive us here.1645}1646}164716481649sub DESTROY {1650my($self) =@_;1651$self->_close_hash_and_insert_object();1652$self->_close_cat_blob();1653}165416551656# Pipe implementation for ActiveState Perl.16571658package Git::activestate_pipe;1659use strict;16601661sub TIEHANDLE {1662my($class,@params) =@_;1663# FIXME: This is probably horrible idea and the thing will explode1664# at the moment you give it arguments that require some quoting,1665# but I have no ActiveState clue... --pasky1666# Let's just hope ActiveState Perl does at least the quoting1667# correctly.1668my@data=qx{git@params};1669bless{ i =>0, data => \@data},$class;1670}16711672sub READLINE {1673my$self=shift;1674if($self->{i} >=scalar@{$self->{data}}) {1675returnundef;1676}1677my$i=$self->{i};1678if(wantarray) {1679$self->{i} =$#{$self->{'data'}} +1;1680returnsplice(@{$self->{'data'}},$i);1681}1682$self->{i} =$i+1;1683return$self->{'data'}->[$i];1684}16851686sub CLOSE {1687my$self=shift;1688delete$self->{data};1689delete$self->{i};1690}16911692sub EOF {1693my$self=shift;1694return($self->{i} >=scalar@{$self->{data}});1695}1696169716981;# Famous last words