1 package DBIx::Class::Optional::Dependencies;
3 ### This may look crazy, but it in fact tangibly ( by 50(!)% ) shortens
4 # the skip-test time when everything requested is unavailable
5 use if $ENV{RELEASE_TESTING} => 'warnings';
6 use if $ENV{RELEASE_TESTING} => 'strict';
14 # NO EXTERNAL NON-5.8.1 CORE DEPENDENCIES EVER (e.g. C::A::G)
15 # This module is to be loaded by Makefile.PM on a pristine system
17 # POD is generated automatically by calling _gen_pod from the
18 # Makefile.PL in $AUTHOR mode
20 # *DELIBERATELY* not making a group for these - they must disappear
21 # forever as optdeps in the first place
24 'MooseX::Types' => '0.21',
25 'MooseX::Types::LoadableClass' => '0.011',
30 # NOTE: the rationale for 2 JSON::Any versions is that
31 # we need the newer only to work around JSON::XS, which
32 # itself is an optional dep
35 'JSON::Any' => '1.23',
39 _json_xs_compatible_json_any => {
41 'JSON::Any' => '1.31',
45 # a common placeholder for engines with IC::DT support based off DT::F::S
46 # currently unused on purpose (see next commits)
47 _icdt_strptime_based => {},
49 _rdbms_generic_odbc => {
55 _rdbms_generic_ado => {
64 title => 'Storage::Replicated',
65 desc => 'Modules required for L<DBIx::Class::Storage::DBI::Replicated>',
70 include => 'replicated',
77 include => '_json_any',
80 'MooseX::Types::Path::Class' => '0.05',
81 'MooseX::Types::JSON' => '0.02',
84 title => 'DBIx::Class::Admin',
85 desc => 'Modules required for the DBIx::Class administrative library',
92 'Getopt::Long::Descriptive' => '0.081',
93 'Text::CSV' => '1.16',
97 desc => 'Modules required for the CLI DBIx::Class interface dbicadmin',
103 'SQL::Translator' => '0.11018',
106 title => 'Storage::DBI::deploy()',
107 desc => 'Modules required for L<DBIx::Class::Storage::DBI/deployment_statements> and L<DBIx::Class::Schema/deploy>',
113 'Math::BigInt' => '1.80',
114 'Math::Base36' => '0.07',
118 test_component_accessor => {
120 'Class::Unload' => '0.07',
126 'Test::Pod' => '1.42',
128 release_testing_mandatory => 1,
131 test_podcoverage => {
133 'Test::Pod::Coverage' => '1.08',
134 'Pod::Coverage' => '0.20',
136 release_testing_mandatory => 1,
141 'Test::EOL' => '1.0',
142 'Test::NoTabs' => '0.9',
144 release_testing_mandatory => 1,
149 'Test::Strict' => '0.20',
151 release_testing_mandatory => 1,
154 test_prettydebug => {
155 include => '_json_any',
158 test_admin_script => {
159 include => [qw( admin_script _json_xs_compatible_json_any )],
163 'Cpanel::JSON::XS' => 0,
166 # for t/admin/10script.t
167 ? ('Win32::ShellQuote' => 0)
168 # DWIW does not compile (./configure even) on win32
169 : ('JSON::DWIW' => 0 )
174 test_leaks_heavy => {
176 'Class::MethodCache' => '0.02',
177 'PadWalker' => '1.06',
183 'DateTime' => '0.55',
184 'DateTime::Format::Strptime' => '1.2',
189 include => 'test_dt',
193 'DateTime::Format::SQLite' => '0',
198 include => 'test_dt',
200 # t/inflate/datetime_mysql.t
201 # (doesn't need Mysql itself)
202 'DateTime::Format::MySQL' => '0',
207 include => 'test_dt',
209 # t/inflate/datetime_pg.t
210 # (doesn't need PG itself)
211 'DateTime::Format::Pg' => '0.16004',
216 include => 'test_dt',
218 'Class::DBI::Plugin::DeepAbstractSearch' => '0',
219 'Time::Piece::MySQL' => '0',
220 'Date::Simple' => '3.03',
224 # this is just for completeness as SQLite
225 # is a core dep of DBIC for testing
231 title => 'SQLite support',
232 desc => 'Modules required to connect to SQLite',
238 # when changing this list make sure to adjust xt/optional_deps.t
242 title => 'PostgreSQL support',
243 desc => 'Modules required to connect to PostgreSQL',
247 _rdbms_mssql_common => {
248 include => '_icdt_strptime_based',
251 rdbms_mssql_odbc => {
252 include => [qw( _rdbms_generic_odbc _rdbms_mssql_common )],
254 title => 'MSSQL support via DBD::ODBC',
255 desc => 'Modules required to connect to MSSQL via DBD::ODBC',
259 rdbms_mssql_sybase => {
260 include => '_rdbms_mssql_common',
265 title => 'MSSQL support via DBD::Sybase',
266 desc => 'Modules required to connect to MSSQL via DBD::Sybase',
271 include => [qw( _rdbms_generic_ado _rdbms_mssql_common )],
273 title => 'MSSQL support via DBD::ADO (Windows only)',
274 desc => 'Modules required to connect to MSSQL via DBD::ADO. This particular DBD is available on Windows only',
278 _rdbms_msaccess_common => {
279 include => '_icdt_strptime_based',
282 rdbms_msaccess_odbc => {
283 include => [qw( _rdbms_generic_odbc _rdbms_msaccess_common )],
285 title => 'MS Access support via DBD::ODBC',
286 desc => 'Modules required to connect to MS Access via DBD::ODBC',
290 rdbms_msaccess_ado => {
291 include => [qw( _rdbms_generic_ado _rdbms_msaccess_common )],
293 title => 'MS Access support via DBD::ADO (Windows only)',
294 desc => 'Modules required to connect to MS Access via DBD::ADO. This particular DBD is available on Windows only',
303 title => 'MySQL support',
304 desc => 'Modules required to connect to MySQL',
309 include => 'id_shortener',
314 title => 'Oracle support',
315 desc => 'Modules required to connect to Oracle',
320 include => '_icdt_strptime_based',
325 title => 'Sybase ASE support',
326 desc => 'Modules required to connect to Sybase ASE',
330 _rdbms_db2_common => {
334 include => '_rdbms_db2_common',
339 title => 'DB2 support',
340 desc => 'Modules required to connect to DB2',
345 include => [qw( _rdbms_generic_odbc _rdbms_db2_common )],
347 title => 'DB2 on AS/400 support',
348 desc => 'Modules required to connect to DB2 on AS/400',
353 include => '_icdt_strptime_based',
355 'DBD::Informix' => 0,
358 title => 'Informix support',
359 desc => 'Modules required to connect to Informix',
363 _rdbms_sqlanywhere_common => {
364 inclide => '_icdt_strptime_based',
367 rdbms_sqlanywhere => {
368 include => '_rdbms_sqlanywhere_common',
370 'DBD::SQLAnywhere' => 0,
373 title => 'SQLAnywhere support',
374 desc => 'Modules required to connect to SQLAnywhere',
378 rdbms_sqlanywhere_odbc => {
379 include => [qw( _rdbms_generic_odbc _rdbms_sqlanywhere_common )],
381 title => 'SQLAnywhere support via DBD::ODBC',
382 desc => 'Modules required to connect to SQLAnywhere via DBD::ODBC',
386 _rdbms_firebird_common => {
387 include => '_icdt_strptime_based',
391 include => '_rdbms_firebird_common',
393 'DBD::Firebird' => 0,
396 title => 'Firebird support',
397 desc => 'Modules required to connect to Firebird',
401 rdbms_firebird_interbase => {
402 include => '_rdbms_firebird_common',
404 'DBD::InterBase' => 0,
407 title => 'Firebird support via DBD::InterBase',
408 desc => 'Modules required to connect to Firebird via DBD::InterBase',
412 rdbms_firebird_odbc => {
413 include => [qw( _rdbms_generic_odbc _rdbms_firebird_common )],
415 title => 'Firebird support via DBD::ODBC',
416 desc => 'Modules required to connect to Firebird via DBD::ODBC',
420 test_rdbms_sqlite => {
421 include => 'rdbms_sqlite',
424 ### IMPORTANT - do not raise this dependency
425 ### even though many bugfixes are present in newer versions, the general DBIC
426 ### rule is to bend over backwards for available DBDs (given upgrading them is
427 ### often *not* easy or even possible)
429 'DBD::SQLite' => '1.29',
434 include => 'rdbms_pg',
436 DBICTEST_PG_DSN => 1,
437 DBICTEST_PG_USER => 0,
438 DBICTEST_PG_PASS => 0,
441 # the order does matter because the rdbms support group might require
442 # a different version that the test group
444 # when changing this list make sure to adjust xt/optional_deps.t
445 'DBD::Pg' => '2.009002', # specific version to test bytea
449 test_rdbms_mssql_odbc => {
450 include => 'rdbms_mssql_odbc',
452 DBICTEST_MSSQL_ODBC_DSN => 1,
453 DBICTEST_MSSQL_ODBC_USER => 0,
454 DBICTEST_MSSQL_ODBC_PASS => 0,
458 test_rdbms_mssql_ado => {
459 include => 'rdbms_mssql_ado',
461 DBICTEST_MSSQL_ADO_DSN => 1,
462 DBICTEST_MSSQL_ADO_USER => 0,
463 DBICTEST_MSSQL_ADO_PASS => 0,
467 test_rdbms_mssql_sybase => {
468 include => 'rdbms_mssql_sybase',
470 DBICTEST_MSSQL_DSN => 1,
471 DBICTEST_MSSQL_USER => 0,
472 DBICTEST_MSSQL_PASS => 0,
476 test_rdbms_msaccess_odbc => {
477 include => 'rdbms_msaccess_odbc',
479 DBICTEST_MSACCESS_ODBC_DSN => 1,
480 DBICTEST_MSACCESS_ODBC_USER => 0,
481 DBICTEST_MSACCESS_ODBC_PASS => 0,
488 test_rdbms_msaccess_ado => {
489 include => 'rdbms_msaccess_ado',
491 DBICTEST_MSACCESS_ADO_DSN => 1,
492 DBICTEST_MSACCESS_ADO_USER => 0,
493 DBICTEST_MSACCESS_ADO_PASS => 0,
500 test_rdbms_mysql => {
501 include => 'rdbms_mysql',
503 DBICTEST_MYSQL_DSN => 1,
504 DBICTEST_MYSQL_USER => 0,
505 DBICTEST_MYSQL_PASS => 0,
509 test_rdbms_oracle => {
510 include => 'rdbms_oracle',
512 DBICTEST_ORA_DSN => 1,
513 DBICTEST_ORA_USER => 0,
514 DBICTEST_ORA_PASS => 0,
517 'DateTime::Format::Oracle' => '0',
518 'DBD::Oracle' => '1.24',
523 include => 'rdbms_ase',
525 DBICTEST_SYBASE_DSN => 1,
526 DBICTEST_SYBASE_USER => 0,
527 DBICTEST_SYBASE_PASS => 0,
532 include => 'rdbms_db2',
534 DBICTEST_DB2_DSN => 1,
535 DBICTEST_DB2_USER => 0,
536 DBICTEST_DB2_PASS => 0,
540 test_rdbms_db2_400 => {
541 include => 'rdbms_db2_400',
543 DBICTEST_DB2_400_DSN => 1,
544 DBICTEST_DB2_400_USER => 0,
545 DBICTEST_DB2_400_PASS => 0,
549 test_rdbms_informix => {
550 include => 'rdbms_informix',
552 DBICTEST_INFORMIX_DSN => 1,
553 DBICTEST_INFORMIX_USER => 0,
554 DBICTEST_INFORMIX_PASS => 0,
558 test_rdbms_sqlanywhere => {
559 include => 'rdbms_sqlanywhere',
561 DBICTEST_SQLANYWHERE_DSN => 1,
562 DBICTEST_SQLANYWHERE_USER => 0,
563 DBICTEST_SQLANYWHERE_PASS => 0,
567 test_rdbms_sqlanywhere_odbc => {
568 include => 'rdbms_sqlanywhere_odbc',
570 DBICTEST_SQLANYWHERE_ODBC_DSN => 1,
571 DBICTEST_SQLANYWHERE_ODBC_USER => 0,
572 DBICTEST_SQLANYWHERE_ODBC_PASS => 0,
576 test_rdbms_firebird => {
577 include => 'rdbms_firebird',
579 DBICTEST_FIREBIRD_DSN => 1,
580 DBICTEST_FIREBIRD_USER => 0,
581 DBICTEST_FIREBIRD_PASS => 0,
585 test_rdbms_firebird_interbase => {
586 include => 'rdbms_firebird_interbase',
588 DBICTEST_FIREBIRD_INTERBASE_DSN => 1,
589 DBICTEST_FIREBIRD_INTERBASE_USER => 0,
590 DBICTEST_FIREBIRD_INTERBASE_PASS => 0,
594 test_rdbms_firebird_odbc => {
595 include => 'rdbms_firebird_odbc',
597 DBICTEST_FIREBIRD_ODBC_DSN => 1,
598 DBICTEST_FIREBIRD_ODBC_USER => 0,
599 DBICTEST_FIREBIRD_ODBC_PASS => 0,
605 DBICTEST_MEMCACHED => 1,
608 'Cache::Memcached' => 0,
613 # we need to run the dbicadmin so we can self-generate its POD
614 # also we do not want surprises in case JSON::XS is in the path
615 # so make sure we get an always-working JSON::Any
616 include => [qw( admin_script _json_xs_compatible_json_any )],
618 'ExtUtils::MakeMaker' => '6.64',
619 'Pod::Inherit' => '0.91',
625 'CPAN::Uploader' => '0.103001',
641 if ($action eq '-die_without') {
645 eval { $class->die_unless_req_ok_for(\@_); 1 }
648 die "\n$err\n" if $err;
650 elsif ($action eq '-list_missing') {
651 print $class->modreq_missing_for(\@_);
655 elsif ($action eq '-skip_all_without') {
657 # sanity check - make sure ->current_test is 0 and no plan has been declared
661 Test::Builder->new->current_test
663 Test::Builder->new->has_plan
665 } and croak("Unable to invoke -skip_all_without after testing has started");
667 if ( my $missing = $class->req_missing_for(\@_) ) {
669 die ("\nMandatory requirements not satisfied during release-testing: $missing\n\n")
670 if $ENV{RELEASE_TESTING} and $class->_groups_to_reqs(\@_)->{release_testing_mandatory};
672 print "1..0 # SKIP requirements not satisfied: $missing\n";
676 elsif ($action =~ /^-/) {
677 croak "Unknown import-time action '$action'";
680 croak "$class is not an exporter, unable to import '$action'";
688 croak( __PACKAGE__ . " does not implement unimport" );
691 # OO for (mistakenly considered) ease of extensibility, not due to any need to
692 # carry state of any sort. This API is currently used outside, so leave as-is.
693 # FIXME - make sure to not propagate this further if module is extracted as a
694 # standalone library - keep the stupidity to a DBIC-secific shim!
697 shift->_groups_to_reqs(shift)->{effective_modreqs};
700 sub modreq_list_for {
701 shift->_groups_to_reqs(shift)->{modreqs};
706 { $_ => $_[0]->_groups_to_reqs($_) }
707 grep { $_ !~ /^_/ } keys %$dbic_reqs
711 sub req_errorlist_for { shift->modreq_errorlist_for(shift) } # deprecated
712 sub modreq_errorlist_for {
713 my ($self, $groups) = @_;
714 $self->_errorlist_for_modreqs( $self->_groups_to_reqs($groups)->{modreqs} );
718 shift->req_missing_for(shift) ? 0 : 1;
721 sub req_missing_for {
722 my ($self, $groups) = @_;
724 my $reqs = $self->_groups_to_reqs($groups);
725 my $mods_missing = $self->modreq_missing_for($groups);
730 ! $reqs->{missing_envvars}
733 my @res = $mods_missing || ();
735 push @res, 'the following group(s) of environment variables: ' . join ' and ', sort map
736 { __envvar_group_desc($_) }
737 @{$reqs->{missing_envvars}}
738 if $reqs->{missing_envvars};
741 ( join ' as well as ', @res )
743 ( $reqs->{modreqs_fully_documented} ? " (see @{[ ref $self || $self ]} documentation for details)" : '' ),
747 sub modreq_missing_for {
748 my ($self, $groups) = @_;
750 my $reqs = $self->_groups_to_reqs($groups);
751 my $modreq_errors = $self->_errorlist_for_modreqs($reqs->{modreqs})
755 { $reqs->{modreqs}{$_} ? qq("$_~>=$reqs->{modreqs}{$_}") : $_ }
756 sort { lc($a) cmp lc($b) } keys %$modreq_errors
760 sub die_unless_req_ok_for {
761 if (my $err = shift->req_missing_for(shift) ) {
762 die "Unable to continue due to missing requirements: $err\n";
768 ### Private functions
770 # potentially shorten group desc
771 sub __envvar_group_desc {
774 my (@res, $last_prefix);
775 while (my $ev = shift @envs) {
776 my ($pref, $sep, $suff) = split / ([\_\-]) (?= [^\_\-]+ \z )/x, $ev;
778 if ( defined $sep and ($last_prefix||'') eq $pref ) {
779 push @res, "...${sep}${suff}"
785 $last_prefix = $pref if $sep;
791 # Expand includes from a random group in a specific order:
792 # nonvariable groups first, then their includes, then the variable groups,
793 # then their includes.
794 # This allows reliably marking the rest of the mod reqs as variable (this is
795 # also why variable includes are currently not allowed)
796 sub __expand_includes {
797 my ($groups, $seen) = @_;
799 # !! DIFFERENT !! behavior and return depending on invocation mode
800 # (easier to recurse this way)
801 my $is_toplevel = $seen
806 my ($res_per_type, $missing_envvars);
808 # breadth-first evaluation, with non-variable includes on top
809 for my $g (@$groups) {
811 croak "Invalid requirement group name '$g': only ascii alphanumerics and _ are allowed"
812 if $g !~ /\A [A-Z_a-z][0-9A-Z_a-z]* \z/x;
814 my $r = $dbic_reqs->{$g}
815 or croak "Requirement group '$g' is not defined";
817 # always do this check *before* the $seen check
818 croak "Group '$g' with variable effective_modreqs can not be specified as an 'include'"
819 if ( $r->{env} and ! $is_toplevel );
821 next if $seen->{$g}++;
823 my $req_type = 'static';
825 if ( my @e = @{$r->{env}||[]} ) {
827 croak "Unexpected 'env' attribute under group '$g' (only allowed in test_* groups)"
828 unless $g =~ /^test_/;
830 croak "Unexpected *odd* list in 'env' under group '$g'"
833 # deconstruct the whole thing
834 my (@group_envnames_list, $some_envs_required, $some_required_missing);
836 push @group_envnames_list, my $envname = shift @e;
838 # env required or not
839 next unless shift @e;
841 $some_envs_required ||= 1;
843 $some_required_missing ||= (
844 ! defined $ENV{$envname}
846 ! length $ENV{$envname}
850 croak "None of the envvars in group '$g' declared as required, making the requirement moot"
851 unless $some_envs_required;
853 if ($some_required_missing) {
854 push @{$missing_envvars->{$g}}, \@group_envnames_list;
855 $req_type = 'variable';
859 push @{$res_per_type->{"base_${req_type}"}}, $g;
861 if (my $i = $dbic_reqs->{$g}{include}) {
862 $i = [ $i ] unless ref $i eq 'ARRAY';
864 croak "Malformed 'include' for group '$g': must be another existing group name or arrayref of existing group names"
867 push @{$res_per_type->{"incs_${req_type}"}}, @$i;
872 @{ $res_per_type->{"base_${_}"} || [] },
873 ( $res_per_type->{"incs_${_}"} ? __expand_includes( $res_per_type->{"incs_${_}"}, $seen ) : () ),
874 } qw(static variable);
876 return ! $is_toplevel ? @ret : do {
879 idx => 1 + keys %$rv,
880 missing_envvars => $missing_envvars->{$_},
887 our %req_unavailability_cache;
889 # this method is just a lister and envvar/metadata checker - it does not try to load anything
890 sub _groups_to_reqs {
891 my ($self, $groups) = @_;
893 $groups = [ $groups || () ]
894 unless ref $groups eq 'ARRAY';
896 croak "@{[ (caller(1))[3] ]}() expects a requirement group name or arrayref of group names"
901 modreqs_fully_documented => 1,
904 my $all_groups = __expand_includes($groups);
906 for my $group (sort { $all_groups->{$a}{idx} <=> $all_groups->{$b}{idx} } keys %$all_groups ) {
908 my $group_reqs = $dbic_reqs->{$group}{req};
911 for (keys %$group_reqs) {
913 $_ =~ /\A [A-Z_a-z][0-9A-Z_a-z]* (?:::[0-9A-Z_a-z]+)* \z /x
914 or croak "Requirement '$_' in group '$group' is not a valid module name";
916 # !!!DO NOT CHANGE!!!
917 # remember - version.pm may not be available on the system
918 croak "Requirement '$_' in group '$group' specifies an invalid version '$group_reqs->{$_}' (only plain non-underscored floating point decimals are supported)"
919 if ( ($group_reqs->{$_}||0) !~ / \A [0-9]+ (?: \. [0-9]+ )? \z /x );
922 if (my $e = $all_groups->{$group}{missing_envvars}) {
923 push @{$ret->{missing_envvars}}, @$e;
926 # assemble into the final ret
929 ( $ret->{missing_envvars} ? () : 'effective_modreqs' ),
931 for my $req_bag ($group_reqs) {
932 for my $mod (keys %$req_bag) {
934 $ret->{$type}{$mod} = $req_bag->{$mod}||0 if (
936 ! exists $ret->{$type}{$mod}
938 # we sanitized the version to be numeric above - we can just -gt it
939 ($req_bag->{$mod}||0) > $ret->{$type}{$mod}
946 $ret->{modreqs_fully_documented} &&= !!$dbic_reqs->{$group}{pod};
948 $ret->{release_testing_mandatory} ||= !!$dbic_reqs->{$group}{release_testing_mandatory};
955 # this method tries to load specified modreqs and returns a hashref of
956 # module/loaderror pairs for anything that failed
957 sub _errorlist_for_modreqs {
958 # args supposedly already went through _groups_to_reqs and are therefore sanitized
959 # safe to eval at will
960 my ($self, $reqs) = @_;
964 for my $m ( keys %$reqs ) {
967 if (! exists $req_unavailability_cache{$m}{$v} ) {
969 eval( "require $m;" . ( $v ? "$m->VERSION(q($v))" : '' ) );
970 $req_unavailability_cache{$m}{$v} = $@;
973 $ret->{$m} = $req_unavailability_cache{$m}{$v}
974 if $req_unavailability_cache{$m}{$v};
981 # This is to be called by the author only (automatically in Makefile.PL)
983 my ($class, $distver, $pod_dir) = @_;
985 die "No POD root dir supplied" unless $pod_dir;
988 eval { require DBIx::Class; DBIx::Class->VERSION; }
991 "\n\n---------------------------------------------------------------------\n" .
992 'Unable to load core DBIx::Class module to determine current version, '.
993 'possibly due to missing dependencies. Author-mode autodocumentation ' .
995 "\n\n---------------------------------------------------------------------\n"
998 # do not ask for a recent version, use 1.x API calls
999 # this *may* execute on a smoker with old perl or whatnot
1002 (my $modfn = __PACKAGE__ . '.pm') =~ s|::|/|g;
1004 (my $podfn = "$pod_dir/$modfn") =~ s/\.pm$/\.pod/;
1005 (my $dir = $podfn) =~ s|/[^/]+$||;
1007 File::Path::mkpath([$dir]);
1009 my $sqltver = $class->req_list_for('deploy')->{'SQL::Translator'}
1010 or die "Hrmm? No sqlt dep?";
1018 push @chunks, <<"EOC";
1019 #########################################################################
1020 ##################### A U T O G E N E R A T E D ########################
1021 #########################################################################
1023 # The contents of this POD file are auto-generated. Any changes you make
1024 # will be lost. If you need to change the generated text edit _gen_pod()
1025 # at the end of $modfn
1030 $class - Optional module dependency specifications (for module authors)
1035 #@@ SYNOPSIS HEADING
1037 push @chunks, <<"EOC";
1040 Somewhere in your build-file (e.g. L<ExtUtils::MakeMaker>'s F<Makefile.PL>):
1044 \$EUMM_ARGS{CONFIGURE_REQUIRES} = {
1045 \%{ \$EUMM_ARGS{CONFIGURE_REQUIRES} || {} },
1046 'DBIx::Class' => '$distver',
1051 my %DBIC_DEPLOY_DEPS = %{ eval {
1053 $class->req_list_for('deploy');
1056 \$EUMM_ARGS{PREREQ_PM} = {
1058 \%{ \$EUMM_ARGS{PREREQ_PM} || {} },
1063 ExtUtils::MakeMaker::WriteMakefile(\%EUMM_ARGS);
1065 B<Note>: The C<eval> protection within the example is due to support for
1066 requirements during L<the C<configure> build phase|CPAN::Meta::Spec/Phases>
1067 not being available on a sufficient portion of production installations of
1068 Perl. Robust support for such dependency requirements is available in the
1069 L<CPAN> installer only since version C<1.94_56> first made available for
1070 production with perl version C<5.12>. It is the belief of the current
1071 maintainer that support for requirements during the C<configure> build phase
1072 will not be sufficiently ubiquitous until the B<year 2020> at the earliest,
1073 hence the extra care demonstrated above. It should also be noted that some
1074 3rd party installers (e.g. L<cpanminus|App::cpanminus>) do the right thing
1075 with configure requirements independent from the versions of perl and CPAN
1081 #@@ DESCRIPTION HEADING
1083 push @chunks, <<'EOC';
1086 Some of the less-frequently used features of L<DBIx::Class> have external
1087 module dependencies on their own. In order not to burden the average user
1088 with modules they will never use, these optional dependencies are not included
1089 in the base Makefile.PL. Instead an exception with a descriptive message is
1090 thrown when a specific feature can't find one or several modules required for
1091 its operation. This module is the central holding place for the current list
1092 of such dependencies, for DBIx::Class core authors, and DBIx::Class extension
1095 Dependencies are organized in L<groups|/CURRENT REQUIREMENT GROUPS> where each
1096 group can list one or more required modules, with an optional minimum version
1097 (or 0 for any version). In addition groups prefixed with C<test_> can specify
1098 a set of environment variables, some (or all) of which are marked as required
1099 for the group to be considered by L</req_list_for>
1101 Each group name (or a combination thereof) can be used in the
1102 L<public methods|/METHODS> as described below.
1107 #@@ REQUIREMENT GROUPLIST HEADING
1109 push @chunks, '=head1 CURRENT REQUIREMENT GROUPS';
1111 for my $group (sort keys %$dbic_reqs) {
1112 my $p = $dbic_reqs->{$group}{pod}
1115 my $modlist = $class->modreq_list_for($group);
1117 next unless keys %$modlist;
1120 "=head2 $p->{title}",
1123 ( map { "=item * $_" . ($modlist->{$_} ? " >= $modlist->{$_}" : '') } (sort keys %$modlist) ),
1125 "Requirement group: B<$group>",
1131 #@@ API DOCUMENTATION HEADING
1133 push @chunks, <<'EOC';
1135 =head1 IMPORT-LIKE ACTIONS
1137 Even though this module is not an L<Exporter>, it recognizes several C<actions>
1138 supplied to its C<import> method.
1140 =head2 -skip_all_without
1144 =item Arguments: @group_names
1148 A convenience wrapper for use during testing:
1151 push @chunks, " use $class -skip_all_without => qw(admin test_rdbms_mysql);";
1153 push @chunks, 'Roughly equivalent to the following code:';
1155 push @chunks, sprintf <<'EOS', ($class) x 2;
1159 if ( my $missing = %s->req_missing_for(\@group_names_) ) {
1160 print "1..0 # SKIP requirements not satisfied: $missing\n";
1166 push @chunks, <<'EOC';
1168 It also takes into account the C<RELEASE_TESTING> environment variable and
1169 behaves like L</-die_without> for any requirement groups marked as
1170 C<release_testing_mandatory>.
1176 =item Arguments: @group_names
1180 A convenience wrapper around L</die_unless_req_ok_for>:
1183 push @chunks, " use $class -die_without => qw(deploy admin);";
1185 push @chunks, <<'EOC';
1187 =head2 -list_missing
1191 =item Arguments: @group_names
1195 A convenience wrapper around L</modreq_missing_for>:
1197 perl -Ilib -MDBIx::Class::Optional::Dependencies=-list_missing,deploy,admin | cpanm
1201 =head2 req_group_list
1205 =item Arguments: none
1207 =item Return Value: \%list_of_requirement_groups
1211 This method should be used by DBIx::Class packagers, to get a hashref of all
1212 dependencies B<keyed> by dependency group. Each key (group name), or a combination
1213 thereof (as an arrayref) can be supplied to the methods below.
1214 The B<values> of the returned hash are currently a set of options B<without a
1215 well defined structure>. If you have use for any of the contents - contact the
1216 maintainers, instead of treating this as public (left alone stable) API.
1222 =item Arguments: $group_name | \@group_names
1224 =item Return Value: \%set_of_module_version_pairs
1228 This method should be used by DBIx::Class extension authors, to determine the
1229 version of modules a specific set of features requires for this version of
1230 DBIx::Class (regardless of their availability on the system).
1231 See the L</SYNOPSIS> for a real-world example.
1233 When handling C<test_*> groups this method behaves B<differently> from
1234 L</modreq_list_for> below (and is the only such inconsistency among the
1235 C<req_*> methods). If a particular group declares as requirements some
1236 C<environment variables> and these requirements are not satisfied (the envvars
1237 are unset) - then the C<module requirements> of this group are not included in
1240 =head2 modreq_list_for
1244 =item Arguments: $group_name | \@group_names
1246 =item Return Value: \%set_of_module_version_pairs
1250 Same as L</req_list_for> but does not take into consideration any
1251 C<environment variable requirements> - returns just the list of required
1258 =item Arguments: $group_name | \@group_names
1260 =item Return Value: 1|0
1264 Returns true or false depending on whether all modules/envvars required by
1265 the group(s) are loadable/set on the system.
1267 =head2 req_missing_for
1271 =item Arguments: $group_name | \@group_names
1273 =item Return Value: $error_message_string
1277 Returns a single-line string suitable for inclusion in larger error messages.
1278 This method would normally be used by DBIx::Class core features, to indicate to
1279 the user that they need to install specific modules and/or set specific
1280 environment variables before being able to use a specific feature set.
1282 For example if some of the requirements for C<deploy> are not available,
1283 the returned string could look like:
1286 push @chunks, qq{ "SQL::Translator~>=$sqltver" (see $class documentation for details)};
1288 push @chunks, <<'EOC';
1289 The author is expected to prepend the necessary text to this message before
1290 returning the actual error seen by the user. See also L</modreq_missing_for>
1292 =head2 modreq_missing_for
1296 =item Arguments: $group_name | \@group_names
1298 =item Return Value: $error_message_string
1302 Same as L</req_missing_for> except that the error string is guaranteed to be
1303 either empty, or contain a set of module requirement specifications suitable
1304 for piping to e.g. L<cpanminus|App::cpanminus>. The method explicitly does not
1305 attempt to validate the state of required environment variables (if any).
1307 For instance if some of the requirements for C<deploy> are not available,
1308 the returned string could look like:
1311 push @chunks, qq{ "SQL::Translator~>=$sqltver"};
1313 push @chunks, <<'EOC';
1315 See also L</-list_missing>.
1317 =head2 die_unless_req_ok_for
1321 =item Arguments: $group_name | \@group_names
1325 Checks if L</req_ok_for> passes for the supplied group(s), and
1326 in case of failure throws an exception including the information
1327 from L</req_missing_for>. See also L</-die_without>.
1329 =head2 modreq_errorlist_for
1333 =item Arguments: $group_name | \@group_names
1335 =item Return Value: \%set_of_loaderrors_per_module
1339 Returns a hashref containing the actual errors that occurred while attempting
1340 to load each module in the requirement group(s).
1342 =head2 req_errorlist_for
1344 Deprecated method name, equivalent (via proxy) to L</modreq_errorlist_for>.
1351 push @chunks, <<'EOC';
1352 =head1 FURTHER QUESTIONS?
1354 Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>.
1356 =head1 COPYRIGHT AND LICENSE
1358 This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE>
1359 by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can
1360 redistribute it and/or modify it under the same terms as the
1361 L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>.
1365 open (my $fh, '>', $podfn) or die;
1366 print $fh join ("\n\n", @chunks) or die;
1367 print $fh "\n" or die;
1369 } or croak( "Unable to write $podfn: " . ( $! || $@ || 'unknown error') );