{"id":6367,"date":"2022-09-02T23:56:19","date_gmt":"2022-09-02T18:26:19","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-search-file-in-directory-structure\/"},"modified":"2022-09-02T23:56:19","modified_gmt":"2022-09-02T18:26:19","slug":"solved-search-file-in-directory-structure","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-search-file-in-directory-structure\/","title":{"rendered":"[Solved] Search file in directory structure"},"content":{"rendered":"

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From one File::Find<\/code> hater to another: DirWalk.pm<\/code>, inspired by the Python’s os.walk()<\/code>.<\/p>\n

package DirWalk;\n\nuse strict;\nuse warnings;\n\nsub new {\n    my ($class, @dirs) = @_;\n\n    my @odirs = @dirs;\n\n    @dirs = qw\/.\/ unless @dirs;\n    s!\/+$!! for @dirs;\n    s!\/+\\.$!! for @dirs;\n\n    my $self = { _odirs => [@odirs], _dirs => [@dirs], _dhstack => [], _dnstack => [] };\n\n    opendir my($dirh), $dirs[0];\n    return undef unless $dirh;\n    shift @{ $self->{_dirs} };\n    unshift @{ $self->{_dhstack} }, $dirh;\n    unshift @{ $self->{_dnstack} }, $dirs[0];\n\n    return bless $self, $class;\n}\n\nsub _walk_op {\n    my ($self) = @_;\n    if (wantarray) {\n        my @ret;\n        while (defined(my $x = $self->next())) {\n            push @ret, $x;\n        }\n        return @ret;\n    }\n    elsif (defined wantarray) {\n        return $self->next();\n    }\n    return undef;\n}\n\nsub next\n{\n    my ($self) = @_;\n    my $dstack = $self->{_dhstack};\n    my $nstack = $self->{_dnstack};\n    if (@$dstack) {\n        my $x;\n        do {\n            $x = readdir $dstack->[0];\n        } while (defined($x) && ($x eq '.' || $x eq '..'));\n\n        if (defined $x) {\n            my $nm = $nstack->[0].\"https:\/\/stackoverflow.com\/\".$x;\n            if (-d $nm) {\n                # open dir, and put the handle on the stack\n                opendir my($dh), $nm;\n                if (defined $dh) {\n                    unshift @{ $self->{_dhstack} }, $dh;\n                    unshift @{ $self->{_dnstack} }, $nm;\n                }\n                else {\n                    warn \"can't walk into $nm!\"\n                }\n                $nm .= \"https:\/\/stackoverflow.com\/\";\n            }\n            # return the name\n            return $nm;\n        }\n        else {\n            closedir $dstack->[0];\n            shift @$dstack;\n            shift @$nstack;\n            unless (@$dstack) {\n                while (@{ $self->{_dirs} }) {\n                    my $dir = shift @{ $self->{_dirs} };\n                    opendir my($dirh), $dir;\n                    next unless defined $dirh;\n                    unshift @{ $self->{_dhstack} }, $dirh;\n                    unshift @{ $self->{_dnstack} }, $dir;\n                    last;\n                }\n            }\n            return $self->next();\n        }\n    }\n    else {\n        return undef;\n    }\n}\n\nuse overload '<>' => \\&_walk_op;\nuse overload '\"\"' => sub { 'DirWalk('.join(', ', @{$_[0]->{_odirs}}).')'; };\n\n1;\n<\/code><\/pre>\n
Example:<\/p>\n
# prepare test structure\nmkdir aaa\ntouch aaa\/bbb\nmkdir aaa\/ccc\ntouch aaa\/ccc\/ddd\n\n# example invocation:\nperl -mDirWalk -E '$dw=DirWalk->new(\"aaa\"); say while <$dw>;'\n\n#output\naaa\/ccc\/\naaa\/ccc\/ddd\naaa\/bbb\n<\/code><\/pre>\n
Another example:<\/p>\n
use strict;\nuse warnings;\nuse DirWalk;\n\n# iteration:\nmy $dw = DirWalk->new(\"aaa\");\nwhile (<$dw>) {\n    print \"$_\\n\";\n}\n\n# or as a list:\n$dw = DirWalk->new(\"aaa\");\nmy @list = <$dw>;\nfor (@list) {\n    print \"$_\\n\";\n}\n<\/code><\/pre>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            5<\/span> <\/p><\/div>\n<\/div>\n
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solved Search file in directory structure <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] From one File::Find hater to another: DirWalk.pm, inspired by the Python’s os.walk(). package DirWalk; use strict; use warnings; sub new { my ($class, @dirs) = @_; my @odirs = @dirs; @dirs = qw\/.\/ unless @dirs; s!\/+$!! for @dirs; s!\/+\\.$!! for @dirs; my $self = { _odirs => [@odirs], _dirs => [@dirs], _dhstack => [], … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[442,720],"class_list":["post-6367","post","type-post","status-publish","format-standard","hentry","category-solved","tag-perl","tag-search"],"yoast_head":"\n[Solved] Search file in directory structure - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-search-file-in-directory-structure\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Search file in directory structure - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] From one File::Find hater to another: DirWalk.pm, inspired by the Python’s os.walk(). package DirWalk; use strict; use warnings; sub new { my ($class, @dirs) = @_; my @odirs = @dirs; @dirs = qw\/.\/ unless @dirs; s!\/+$!! for @dirs; s!\/+.$!! for @dirs; my $self = { _odirs => [@odirs], _dirs => [@dirs], _dhstack => [], ... 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