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    1 package CPAN::HandleConfig;
    2 use strict;
    3 use vars qw(%can %keys $loading $VERSION);
    4 use File::Path ();
    5 use File::Spec ();
    6 use File::Basename ();
    7 use Carp ();
    8 
    9 =head1 NAME
   10 
   11 CPAN::HandleConfig - internal configuration handling for CPAN.pm
   12 
   13 =cut 
   14 
   15 $VERSION = "5.5008"; # see also CPAN::Config::VERSION at end of file
   16 
   17 %can = (
   18         commit   => "Commit changes to disk",
   19         defaults => "Reload defaults from disk",
   20         help     => "Short help about 'o conf' usage",
   21         init     => "Interactive setting of all options",
   22 );
   23 
   24 # Q: where is the "How do I add a new config option" HOWTO?
   25 # A1: svn diff -r 757:758 # where dagolden added test_report [git e997b71de88f1019a1472fc13cb97b1b7f96610f]
   26 # A2: svn diff -r 985:986 # where andk added yaml_module [git 312b6d9b12b1bdec0b6e282d853482145475021f]
   27 # A3: 1. add new config option to %keys below
   28 #     2. add a Pod description in CPAN::FirstTime; it should include a
   29 #        prompt line; see others for examples
   30 #     3. add a "matcher" section in CPAN::FirstTime::init that includes
   31 #        a prompt function; see others for examples
   32 #     4. add config option to documentation section in CPAN.pm
   33 
   34 %keys = map { $_ => undef }
   35     (
   36      "applypatch",
   37      "auto_commit",
   38      "build_cache",
   39      "build_dir",
   40      "build_dir_reuse",
   41      "build_requires_install_policy",
   42      "bzip2",
   43      "cache_metadata",
   44      "check_sigs",
   45      "cleanup_after_install",
   46      "colorize_debug",
   47      "colorize_output",
   48      "colorize_print",
   49      "colorize_warn",
   50      "commandnumber_in_prompt",
   51      "commands_quote",
   52      "connect_to_internet_ok",
   53      "cpan_home",
   54      "curl",
   55      "dontload_hash", # deprecated after 1.83_68 (rev. 581)
   56      "dontload_list",
   57      "ftp",
   58      "ftp_passive",
   59      "ftp_proxy",
   60      "ftpstats_size",
   61      "ftpstats_period",
   62      "getcwd",
   63      "gpg",
   64      "gzip",
   65      "halt_on_failure",
   66      "histfile",
   67      "histsize",
   68      "http_proxy",
   69      "inactivity_timeout",
   70      "index_expire",
   71      "inhibit_startup_message",
   72      "keep_source_where",
   73      "load_module_verbosity",
   74      "lynx",
   75      "make",
   76      "make_arg",
   77      "make_install_arg",
   78      "make_install_make_command",
   79      "makepl_arg",
   80      "mbuild_arg",
   81      "mbuild_install_arg",
   82      "mbuild_install_build_command",
   83      "mbuildpl_arg",
   84      "ncftp",
   85      "ncftpget",
   86      "no_proxy",
   87      "pager",
   88      "password",
   89      "patch",
   90      "patches_dir",
   91      "perl5lib_verbosity",
   92      "plugin_list",
   93      "prefer_external_tar",
   94      "prefer_installer",
   95      "prefs_dir",
   96      "prerequisites_policy",
   97      "proxy_pass",
   98      "proxy_user",
   99      "randomize_urllist",
  100      "recommends_policy",
  101      "scan_cache",
  102      "shell",
  103      "show_unparsable_versions",
  104      "show_upload_date",
  105      "show_zero_versions",
  106      "suggests_policy",
  107      "tar",
  108      "tar_verbosity",
  109      "term_is_latin",
  110      "term_ornaments",
  111      "test_report",
  112      "trust_test_report_history",
  113      "unzip",
  114      "urllist",
  115      "use_prompt_default",
  116      "use_sqlite",
  117      "username",
  118      "version_timeout",
  119      "wait_list",
  120      "wget",
  121      "yaml_load_code",
  122      "yaml_module",
  123     );
  124 
  125 my %prefssupport = map { $_ => 1 }
  126     (
  127      "build_requires_install_policy",
  128      "check_sigs",
  129      "make",
  130      "make_install_make_command",
  131      "prefer_installer",
  132      "test_report",
  133     );
  134 
  135 # returns true on successful action
  136 sub edit {
  137     my($self,@args) = @_;
  138     return unless @args;
  139     CPAN->debug("self[$self]args[".join(" | ",@args)."]");
  140     my($o,$str,$func,$args,$key_exists);
  141     $o = shift @args;
  142     if($can{$o}) {
  143         my $success = $self->$o(args => \@args); # o conf init => sub init => sub load
  144         unless ($success) {
  145             die "Panic: could not configure CPAN.pm for args [@args]. Giving up.";
  146         }
  147     } else {
  148         CPAN->debug("o[$o]") if $CPAN::DEBUG;
  149         unless (exists $keys{$o}) {
  150             $CPAN::Frontend->mywarn("Warning: unknown configuration variable '$o'\n");
  151         }
  152         my $changed;
  153 
  154 
  155         # one day I used randomize_urllist for a boolean, so we must
  156         # list them explicitly --ak
  157         if (0) {
  158         } elsif ($o =~ /^(wait_list|urllist|dontload_list|plugin_list)$/) {
  159 
  160             #
  161             # ARRAYS
  162             #
  163 
  164             $func = shift @args;
  165             $func ||= "";
  166             CPAN->debug("func[$func]args[@args]") if $CPAN::DEBUG;
  167             # Let's avoid eval, it's easier to comprehend without.
  168             if ($func eq "push") {
  169                 push @{$CPAN::Config->{$o}}, @args;
  170                 $changed = 1;
  171             } elsif ($func eq "pop") {
  172                 pop @{$CPAN::Config->{$o}};
  173                 $changed = 1;
  174             } elsif ($func eq "shift") {
  175                 shift @{$CPAN::Config->{$o}};
  176                 $changed = 1;
  177             } elsif ($func eq "unshift") {
  178                 unshift @{$CPAN::Config->{$o}}, @args;
  179                 $changed = 1;
  180             } elsif ($func eq "splice") {
  181                 my $offset = shift @args || 0;
  182                 my $length = shift @args || 0;
  183                 splice @{$CPAN::Config->{$o}}, $offset, $length, @args; # may warn
  184                 $changed = 1;
  185             } elsif ($func) {
  186                 $CPAN::Config->{$o} = [$func, @args];
  187                 $changed = 1;
  188             } else {
  189                 $self->prettyprint($o);
  190             }
  191             if ($changed) {
  192                 if ($o eq "urllist") {
  193                     # reset the cached values
  194                     undef $CPAN::FTP::Thesite;
  195                     undef $CPAN::FTP::Themethod;
  196                     $CPAN::Index::LAST_TIME = 0;
  197                 } elsif ($o eq "dontload_list") {
  198                     # empty it, it will be built up again
  199                     $CPAN::META->{dontload_hash} = {};
  200                 }
  201             }
  202         } elsif ($o =~ /_hash$/) {
  203 
  204             #
  205             # HASHES
  206             #
  207 
  208             if (@args==1 && $args[0] eq "") {
  209                 @args = ();
  210             } elsif (@args % 2) {
  211                 push @args, "";
  212             }
  213             $CPAN::Config->{$o} = { @args };
  214             $changed = 1;
  215         } else {
  216 
  217             #
  218             # SCALARS
  219             #
  220 
  221             if (defined $args[0]) {
  222                 $CPAN::CONFIG_DIRTY = 1;
  223                 $CPAN::Config->{$o} = $args[0];
  224                 $changed = 1;
  225             }
  226             $self->prettyprint($o)
  227                 if exists $keys{$o} or defined $CPAN::Config->{$o};
  228         }
  229         if ($changed) {
  230             if ($CPAN::Config->{auto_commit}) {
  231                 $self->commit;
  232             } else {
  233                 $CPAN::CONFIG_DIRTY = 1;
  234                 $CPAN::Frontend->myprint("Please use 'o conf commit' to ".
  235                                          "make the config permanent!\n\n");
  236             }
  237         }
  238     }
  239 }
  240 
  241 sub prettyprint {
  242     my($self,$k) = @_;
  243     my $v = $CPAN::Config->{$k};
  244     if (ref $v) {
  245         my(@report);
  246         if (ref $v eq "ARRAY") {
  247             @report = map {"\t$_ \[$v->[$_]]\n"} 0..$#$v;
  248         } else {
  249             @report = map
  250                 {
  251                     sprintf "\t%-18s => %s\n",
  252                                "[$_]",
  253                                         defined $v->{$_} ? "[$v->{$_}]" : "undef"
  254                 } sort keys %$v;
  255         }
  256         $CPAN::Frontend->myprint(
  257                                  join(
  258                                       "",
  259                                       sprintf(
  260                                               "    %-18s\n",
  261                                               $k
  262                                              ),
  263                                       @report
  264                                      )
  265                                 );
  266     } elsif (defined $v) {
  267         $CPAN::Frontend->myprint(sprintf "    %-18s [%s]\n", $k, $v);
  268     } else {
  269         $CPAN::Frontend->myprint(sprintf "    %-18s undef\n", $k);
  270     }
  271 }
  272 
  273 # generally, this should be called without arguments so that the currently
  274 # loaded config file is where changes are committed.
  275 sub commit {
  276     my($self,@args) = @_;
  277     CPAN->debug("args[@args]") if $CPAN::DEBUG;
  278     if ($CPAN::RUN_DEGRADED) {
  279         $CPAN::Frontend->mydie(
  280             "'o conf commit' disabled in ".
  281             "degraded mode. Maybe try\n".
  282             " !undef \$CPAN::RUN_DEGRADED\n"
  283         );
  284     }
  285     my ($configpm, $must_reload);
  286 
  287     # XXX does anything do this? can it be simplified? -- dagolden, 2011-01-19
  288     if (@args) {
  289       if ($args[0] eq "args") {
  290         # we have not signed that contract
  291       } else {
  292         $configpm = $args[0];
  293       }
  294     }
  295 
  296     # use provided name or the current config or create a new MyConfig
  297     $configpm ||= require_myconfig_or_config() || make_new_config();
  298 
  299     # commit to MyConfig if we can't write to Config
  300     if ( ! -w $configpm && $configpm =~ m{CPAN/Config\.pm} ) {
  301         my $myconfig = _new_config_name();
  302         $CPAN::Frontend->mywarn(
  303             "Your $configpm file\n".
  304             "is not writable. I will attempt to write your configuration to\n" .
  305             "$myconfig instead.\n\n"
  306         );
  307         $configpm = make_new_config();
  308         $must_reload++; # so it gets loaded as $INC{'CPAN/MyConfig.pm'}
  309     }
  310 
  311     # XXX why not just "-w $configpm"? -- dagolden, 2011-01-19
  312     my($mode);
  313     if (-f $configpm) {
  314         $mode = (stat $configpm)[2];
  315         if ($mode && ! -w _) {
  316             _die_cant_write_config($configpm);
  317         }
  318     }
  319 
  320     $self->_write_config_file($configpm);
  321     require_myconfig_or_config() if $must_reload;
  322 
  323     #$mode = 0444 | ( $mode & 0111 ? 0111 : 0 );
  324     #chmod $mode, $configpm;
  325 ###why was that so?    $self->defaults;
  326     $CPAN::Frontend->myprint("commit: wrote '$configpm'\n");
  327     $CPAN::CONFIG_DIRTY = 0;
  328     1;
  329 }
  330 
  331 sub _write_config_file {
  332     my ($self, $configpm) = @_;
  333     my $msg;
  334     $msg = <<EOF if $configpm =~ m{CPAN/Config\.pm};
  335 
  336 # This is CPAN.pm's systemwide configuration file. This file provides
  337 # defaults for users, and the values can be changed in a per-user
  338 # configuration file.
  339 
  340 EOF
  341     $msg ||= "\n";
  342     my($fh) = FileHandle->new;
  343     rename $configpm, "$configpm~" if -f $configpm;
  344     open $fh, ">$configpm" or
  345         $CPAN::Frontend->mydie("Couldn't open >$configpm: $!");
  346     $fh->print(qq[$msg\$CPAN::Config = \{\n]);
  347     foreach (sort keys %$CPAN::Config) {
  348         unless (exists $keys{$_}) {
  349             # do not drop them: forward compatibility!
  350             $CPAN::Frontend->mywarn("Unknown config variable '$_'\n");
  351             next;
  352         }
  353         $fh->print(
  354             "  '$_' => ",
  355             $self->neatvalue($CPAN::Config->{$_}),
  356             ",\n"
  357         );
  358     }
  359     $fh->print("};\n1;\n__END__\n");
  360     close $fh;
  361 
  362     return;
  363 }
  364 
  365 
  366 # stolen from MakeMaker; not taking the original because it is buggy;
  367 # bugreport will have to say: keys of hashes remain unquoted and can
  368 # produce syntax errors
  369 sub neatvalue {
  370     my($self, $v) = @_;
  371     return "undef" unless defined $v;
  372     my($t) = ref $v;
  373     unless ($t) {
  374         $v =~ s/\\/\\\\/g;
  375         return "q[$v]";
  376     }
  377     if ($t eq 'ARRAY') {
  378         my(@m, @neat);
  379         push @m, "[";
  380         foreach my $elem (@$v) {
  381             push @neat, "q[$elem]";
  382         }
  383         push @m, join ", ", @neat;
  384         push @m, "]";
  385         return join "", @m;
  386     }
  387     return "$v" unless $t eq 'HASH';
  388     my @m;
  389     foreach my $key (sort keys %$v) {
  390         my $val = $v->{$key};
  391         push(@m,"q[$key]=>".$self->neatvalue($val)) ;
  392     }
  393     return "{ ".join(', ',@m)." }";
  394 }
  395 
  396 sub defaults {
  397     my($self) = @_;
  398     if ($CPAN::RUN_DEGRADED) {
  399                              $CPAN::Frontend->mydie(
  400                                                     "'o conf defaults' disabled in ".
  401                                                     "degraded mode. Maybe try\n".
  402                                                     " !undef \$CPAN::RUN_DEGRADED\n"
  403                                                    );
  404     }
  405     my $done;
  406     for my $config (qw(CPAN/MyConfig.pm CPAN/Config.pm)) {
  407         if ($INC{$config}) {
  408             CPAN->debug("INC{'$config'}[$INC{$config}]") if $CPAN::DEBUG;
  409             CPAN::Shell->_reload_this($config,{reloforce => 1});
  410             $CPAN::Frontend->myprint("'$INC{$config}' reread\n");
  411             last;
  412         }
  413     }
  414     $CPAN::CONFIG_DIRTY = 0;
  415     1;
  416 }
  417 
  418 =head2 C<< CLASS->safe_quote ITEM >>
  419 
  420 Quotes an item to become safe against spaces
  421 in shell interpolation. An item is enclosed
  422 in double quotes if:
  423 
  424   - the item contains spaces in the middle
  425   - the item does not start with a quote
  426 
  427 This happens to avoid shell interpolation
  428 problems when whitespace is present in
  429 directory names.
  430 
  431 This method uses C<commands_quote> to determine
  432 the correct quote. If C<commands_quote> is
  433 a space, no quoting will take place.
  434 
  435 
  436 if it starts and ends with the same quote character: leave it as it is
  437 
  438 if it contains no whitespace: leave it as it is
  439 
  440 if it contains whitespace, then
  441 
  442 if it contains quotes: better leave it as it is
  443 
  444 else: quote it with the correct quote type for the box we're on
  445 
  446 =cut
  447 
  448 {
  449     # Instead of patching the guess, set commands_quote
  450     # to the right value
  451     my ($quotes,$use_quote)
  452         = $^O eq 'MSWin32'
  453             ? ('"', '"')
  454                 : (q{"'}, "'")
  455                     ;
  456 
  457     sub safe_quote {
  458         my ($self, $command) = @_;
  459         # Set up quote/default quote
  460         my $quote = $CPAN::Config->{commands_quote} || $quotes;
  461 
  462         if ($quote ne ' '
  463             and defined($command )
  464             and $command =~ /\s/
  465             and $command !~ /[$quote]/) {
  466             return qq<$use_quote$command$use_quote>
  467         }
  468         return $command;
  469     }
  470 }
  471 
  472 sub init {
  473     my($self,@args) = @_;
  474     CPAN->debug("self[$self]args[".join(",",@args)."]");
  475     $self->load(do_init => 1, @args);
  476     1;
  477 }
  478 
  479 # Loads CPAN::MyConfig or fall-back to CPAN::Config. Will not reload a file
  480 # if already loaded. Returns the path to the file %INC or else the empty string
  481 #
  482 # Note -- if CPAN::Config were loaded and CPAN::MyConfig subsequently
  483 # created, calling this again will leave *both* in %INC
  484 
  485 sub require_myconfig_or_config () {
  486     if (   $INC{"CPAN/MyConfig.pm"} || _try_loading("CPAN::MyConfig", cpan_home())) {
  487         return $INC{"CPAN/MyConfig.pm"};
  488     }
  489     elsif ( $INC{"CPAN/Config.pm"} || _try_loading("CPAN::Config") ) {
  490         return $INC{"CPAN/Config.pm"};
  491     }
  492     else {
  493         return q{};
  494     }
  495 }
  496 
  497 # Load a module, but ignore "can't locate..." errors
  498 # Optionally take a list of directories to add to @INC for the load
  499 sub _try_loading {
  500     my ($module, @dirs) = @_;
  501     (my $file = $module) =~ s{::}{/}g;
  502     $file .= ".pm";
  503 
  504     local @INC = @INC;
  505     for my $dir ( @dirs ) {
  506         if ( -f File::Spec->catfile($dir, $file) ) {
  507             unshift @INC, $dir;
  508             last;
  509         }
  510     }
  511 
  512     eval { require $file };
  513     my $err_myconfig = $@;
  514     if ($err_myconfig and $err_myconfig !~ m#locate \Q$file\E#) {
  515         die "Error while requiring ${module}:\n$err_myconfig";
  516     }
  517     return $INC{$file};
  518 }
  519 
  520 # prioritized list of possible places for finding "CPAN/MyConfig.pm"
  521 sub cpan_home_dir_candidates {
  522     my @dirs;
  523     my $old_v = $CPAN::Config->{load_module_verbosity};
  524     $CPAN::Config->{load_module_verbosity} = q[none];
  525     if ($CPAN::META->has_usable('File::HomeDir')) {
  526         if ($^O ne 'darwin') {
  527             push @dirs, File::HomeDir->my_data;
  528             # my_data is ~/Library/Application Support on darwin,
  529             # which causes issues in the toolchain.
  530         }
  531         push @dirs, File::HomeDir->my_home;
  532     }
  533     # Windows might not have HOME, so check it first
  534     push @dirs, $ENV{HOME} if $ENV{HOME};
  535     # Windows might have these instead
  536     push( @dirs, File::Spec->catpath($ENV{HOMEDRIVE}, $ENV{HOMEPATH}, '') )
  537       if $ENV{HOMEDRIVE} && $ENV{HOMEPATH};
  538     push @dirs, $ENV{USERPROFILE} if $ENV{USERPROFILE};
  539 
  540     $CPAN::Config->{load_module_verbosity} = $old_v;
  541     my $dotcpan = $^O eq 'VMS' ? '_cpan' : '.cpan';
  542     @dirs = map { File::Spec->catdir($_, $dotcpan) } grep { defined } @dirs;
  543     return wantarray ? @dirs : $dirs[0];
  544 }
  545 
  546 sub load {
  547     my($self, %args) = @_;
  548     $CPAN::Be_Silent+=0; # protect against 'used only once'
  549     $CPAN::Be_Silent++ if $args{be_silent}; # do not use; planned to be removed in 2011
  550     my $do_init = delete $args{do_init} || 0;
  551     my $make_myconfig = delete $args{make_myconfig};
  552     $loading = 0 unless defined $loading;
  553 
  554     my $configpm = require_myconfig_or_config;
  555     my @miss = $self->missing_config_data;
  556     CPAN->debug("do_init[$do_init]loading[$loading]miss[@miss]") if $CPAN::DEBUG;
  557     return unless $do_init || @miss;
  558 
  559     # I'm not how we'd ever wind up in a recursive loop, but I'm leaving
  560     # this here for safety's sake -- dagolden, 2011-01-19
  561     return if $loading;
  562     local $loading = ($loading||0) + 1;
  563 
  564     # Warn if we have a config file, but things were found missing
  565     if ($configpm && @miss && !$do_init) {
  566         if ($make_myconfig || ( ! -w $configpm && $configpm =~ m{CPAN/Config\.pm})) {
  567             $configpm = make_new_config();
  568             $CPAN::Frontend->myprint(<<END);
  569 The system CPAN configuration file has provided some default values,
  570 but you need to complete the configuration dialog for CPAN.pm.
  571 Configuration will be written to
  572  <<$configpm>>
  573 END
  574         }
  575         else {
  576             $CPAN::Frontend->myprint(<<END);
  577 Sorry, we have to rerun the configuration dialog for CPAN.pm due to
  578 some missing parameters. Configuration will be written to
  579  <<$configpm>>
  580 
  581 END
  582         }
  583     }
  584 
  585     require CPAN::FirstTime;
  586     return CPAN::FirstTime::init($configpm || make_new_config(), %args);
  587 }
  588 
  589 # Creates a new, empty config file at the preferred location
  590 # Any existing will be renamed with a ".bak" suffix if possible
  591 # If the file cannot be created, an exception is thrown
  592 sub make_new_config {
  593     my $configpm = _new_config_name();
  594     my $configpmdir = File::Basename::dirname( $configpm );
  595     File::Path::mkpath($configpmdir) unless -d $configpmdir;
  596 
  597     if ( -w $configpmdir ) {
  598         #_#_# following code dumped core on me with 5.003_11, a.k.
  599         if( -f $configpm ) {
  600             my $configpm_bak = "$configpm.bak";
  601             unlink $configpm_bak if -f $configpm_bak;
  602             if( rename $configpm, $configpm_bak ) {
  603                 $CPAN::Frontend->mywarn(<<END);
  604 Old configuration file $configpm
  605     moved to $configpm_bak
  606 END
  607             }
  608         }
  609         my $fh = FileHandle->new;
  610         if ($fh->open(">$configpm")) {
  611             $fh->print("1;\n");
  612             return $configpm;
  613         }
  614     }
  615     _die_cant_write_config($configpm);
  616 }
  617 
  618 sub _die_cant_write_config {
  619     my ($configpm) = @_;
  620     $CPAN::Frontend->mydie(<<"END");
  621 WARNING: CPAN.pm is unable to write a configuration file.  You
  622 must be able to create and write to '$configpm'.
  623 
  624 Aborting configuration.
  625 END
  626 
  627 }
  628 
  629 # From candidate directories, we would like (in descending preference order):
  630 #   * the one that contains a MyConfig file
  631 #   * one that exists (even without MyConfig)
  632 #   * the first one on the list
  633 sub cpan_home {
  634     my @dirs = cpan_home_dir_candidates();
  635     for my $d (@dirs) {
  636         return $d if -f "$d/CPAN/MyConfig.pm";
  637     }
  638     for my $d (@dirs) {
  639         return $d if -d $d;
  640     }
  641     return $dirs[0];
  642 }
  643 
  644 sub _new_config_name {
  645     return File::Spec->catfile(cpan_home(), 'CPAN', 'MyConfig.pm');
  646 }
  647 
  648 # returns mandatory but missing entries in the Config
  649 sub missing_config_data {
  650     my(@miss);
  651     for (
  652          "auto_commit",
  653          "build_cache",
  654          "build_dir",
  655          "cache_metadata",
  656          "cpan_home",
  657          "ftp_proxy",
  658          #"gzip",
  659          "http_proxy",
  660          "index_expire",
  661          #"inhibit_startup_message",
  662          "keep_source_where",
  663          #"make",
  664          "make_arg",
  665          "make_install_arg",
  666          "makepl_arg",
  667          "mbuild_arg",
  668          "mbuild_install_arg",
  669          ($^O eq "MSWin32" ? "" : "mbuild_install_build_command"),
  670          "mbuildpl_arg",
  671          "no_proxy",
  672          #"pager",
  673          "prerequisites_policy",
  674          "scan_cache",
  675          #"tar",
  676          #"unzip",
  677          "urllist",
  678         ) {
  679         next unless exists $keys{$_};
  680         push @miss, $_ unless defined $CPAN::Config->{$_};
  681     }
  682     return @miss;
  683 }
  684 
  685 sub help {
  686     $CPAN::Frontend->myprint(q[
  687 Known options:
  688   commit    commit session changes to disk
  689   defaults  reload default config values from disk
  690   help      this help
  691   init      enter a dialog to set all or a set of parameters
  692 
  693 Edit key values as in the following (the "o" is a literal letter o):
  694   o conf build_cache 15
  695   o conf build_dir "/foo/bar"
  696   o conf urllist shift
  697   o conf urllist unshift ftp://ftp.foo.bar/
  698   o conf inhibit_startup_message 1
  699 
  700 ]);
  701     1; #don't reprint CPAN::Config
  702 }
  703 
  704 sub cpl {
  705     my($word,$line,$pos) = @_;
  706     $word ||= "";
  707     CPAN->debug("word[$word] line[$line] pos[$pos]") if $CPAN::DEBUG;
  708     my(@words) = split " ", substr($line,0,$pos+1);
  709     if (
  710         defined($words[2])
  711         and
  712         $words[2] =~ /list$/
  713         and
  714         (
  715         @words == 3
  716         ||
  717         @words == 4 && length($word)
  718         )
  719        ) {
  720         return grep /^\Q$word\E/, qw(splice shift unshift pop push);
  721     } elsif (defined($words[2])
  722              and
  723              $words[2] eq "init"
  724              and
  725             (
  726              @words == 3
  727              ||
  728              @words >= 4 && length($word)
  729             )) {
  730         return sort grep /^\Q$word\E/, keys %keys;
  731     } elsif (@words >= 4) {
  732         return ();
  733     }
  734     my %seen;
  735     my(@o_conf) =  sort grep { !$seen{$_}++ }
  736         keys %can,
  737             keys %$CPAN::Config,
  738                 keys %keys;
  739     return grep /^\Q$word\E/, @o_conf;
  740 }
  741 
  742 sub prefs_lookup {
  743     my($self,$distro,$what) = @_;
  744 
  745     if ($prefssupport{$what}) {
  746         return $CPAN::Config->{$what} unless
  747             $distro
  748                 and $distro->prefs
  749                     and $distro->prefs->{cpanconfig}
  750                         and defined $distro->prefs->{cpanconfig}{$what};
  751         return $distro->prefs->{cpanconfig}{$what};
  752     } else {
  753         $CPAN::Frontend->mywarn("Warning: $what not yet officially ".
  754                                 "supported for distroprefs, doing a normal lookup");
  755         return $CPAN::Config->{$what};
  756     }
  757 }
  758 
  759 
  760 {
  761     package
  762         CPAN::Config; ####::###### #hide from indexer
  763     # note: J. Nick Koston wrote me that they are using
  764     # CPAN::Config->commit although undocumented. I suggested
  765     # CPAN::Shell->o("conf","commit") even when ugly it is at least
  766     # documented
  767 
  768     # that's why I added the CPAN::Config class with autoload and
  769     # deprecated warning
  770 
  771     use strict;
  772     use vars qw($AUTOLOAD $VERSION);
  773     $VERSION = "5.5008";
  774 
  775     # formerly CPAN::HandleConfig was known as CPAN::Config
  776     sub AUTOLOAD { ## no critic
  777         my $class = shift; # e.g. in dh-make-perl: CPAN::Config
  778         my($l) = $AUTOLOAD;
  779         $CPAN::Frontend->mywarn("Dispatching deprecated method '$l' to CPAN::HandleConfig\n");
  780         $l =~ s/.*:://;
  781         CPAN::HandleConfig->$l(@_);
  782     }
  783 }
  784 
  785 1;
  786 
  787 __END__
  788 
  789 =head1 LICENSE
  790 
  791 This program is free software; you can redistribute it and/or
  792 modify it under the same terms as Perl itself.
  793 
  794 =cut
  795 
  796 # Local Variables:
  797 # mode: cperl
  798 # cperl-indent-level: 4
  799 # End:
  800 # vim: ts=4 sts=4 sw=4: