目录会自动扫描吗？

Question

当我想提供包含模块的目录时，我编写：

perl -Ilib -Isome/dir script.pl

我应该也包括archname目录吗?还是自动扫描？

来自Makefile

{APP_ROOT}/local/lib/perl5/${shell perl -MConfig -e 'print $$Config{archname}'}

UPD

perl -V输出：

/home/kes/perl5/perlbrew/perls/perl-5.24.0/lib/site_perl/5.24.0/x86_64-linux
/home/kes/perl5/perlbrew/perls/perl-5.24.0/lib/site_perl/5.24.0
/home/kes/perl5/perlbrew/perls/perl-5.24.0/lib/5.24.0/x86_64-linux
/home/kes/perl5/perlbrew/perls/perl-5.24.0/lib/5.24.0

Answer 1

默认情况下，archname包括在@INC中，如果它存在：

perl -MConfig -E 'say $_ for ($Config{archname}, @INC)'
x86_64-linux
/home/user/perl5/perlbrew/perls/perl-5.24.1/lib/site_perl/5.24.1/x86_64-linux
/home/user/perl5/perlbrew/perls/perl-5.24.1/lib/site_perl/5.24.1
/home/user/perl5/perlbrew/perls/perl-5.24.1/lib/5.24.1/x86_64-linux
/home/user/perl5/perlbrew/perls/perl-5.24.1/lib/5.24.1

如果存在UPD，则添加：

perl -Isomedir -e 'local $"="\n"; print "@INC"'

somedir
/home/kes/perl5/perlbrew/perls/perl-5.24.0/lib/site_perl/5.24.0/x86_64-linux
/home/kes/perl5/perlbrew/perls/perl-5.24.0/lib/site_perl/5.24.0
/home/kes/perl5/perlbrew/perls/perl-5.24.0/lib/5.24.0/x86_64-linux
/home/kes/perl5/perlbrew/perls/perl-5.24.0/lib/5.24.0

mkdir -p somedir/x86_64-linux perl -Isomedir -e 'local $"="\n"; print "@INC"'

somedir/x86_64-linux
somedir
/home/kes/perl5/perlbrew/perls/perl-5.24.0/lib/site_perl/5.24.0/x86_64-linux
/home/kes/perl5/perlbrew/perls/perl-5.24.0/lib/site_perl/5.24.0
/home/kes/perl5/perlbrew/perls/perl-5.24.0/lib/5.24.0/x86_64-linux
/home/kes/perl5/perlbrew/perls/perl-5.24.0/lib/5.24.0

Answer 2

是的，如果存在，则在添加父非arch目录时，arch子目录将被添加到@INC。

基线：

$ perl -E'say for @INC' | wc -l
5

通过-I添加

$ perl -Ilib -E'say for @INC' | head -n -5
lib/5.24.0/x86_64-linux-thread-multi
lib/5.24.0
lib

通过PERL5LIB添加

$ PERL5LIB=lib perl -E'say for @INC' | head -n -5
lib/5.24.0/x86_64-linux-thread-multi
lib/5.24.0
lib

通过lib.pm添加：

$ perl -E'use lib qw( lib ); say for @INC' | head -n -5
lib/5.24.0/x86_64-linux-thread-multi
lib/5.24.0
lib

通过mylib.pm添加：

$ perl -E'use mylib; say for @INC' | head -n -5
/.../lib/5.24.0/x86_64-linux-thread-multi
/.../lib/5.24.0
/.../lib

如果您直接将它们添加到中，则不添加它们

$ perl -E'unshift @INC, "lib"; say for @INC' | head -n -5
lib