...the magic that windows uses for the "My Documents" and similar folders -- junctions

With a couple lines of your script commented out, I'm getting good preliminary results:

    C:/Users/tblaz/1.modules.pl
    C:/Users/tblaz/1.txt
    C:/Users/tblaz/2.txt
$VAR1 = {
          'Start Menu' => 1,
          'Application Data' => 1,
          'My Documents' => 1,
          'Cookies' => 1,
          'Local Settings' => 1,
          'Templates' => 1,
          'Recent' => 1,
          'NetHood' => 1,
          'PrintHood' => 1,
          'SendTo' => 1
        };
 d  C:/Users/tblaz/3D Objects
    C:/Users/tblaz/5.txt
 d  C:/Users/tblaz/AppData
Jd  C:/Users/tblaz/Application Data
 d  C:/Users/tblaz/Contacts
Jd  C:/Users/tblaz/Cookies
 d  C:/Users/tblaz/Desktop
 d  C:/Users/tblaz/Documents
...
Jd  C:/Users/tblaz/Start Menu
Jd  C:/Users/tblaz/Templates
 d  C:/Users/tblaz/Videos
$VAR1 = {};
 d  C:/Strawberry/c
 d  C:/Strawberry/cpan
    C:/Strawberry/DISTRIBUTIONS.txt
 d  C:/Strawberry/licenses
 d  C:/Strawberry/perl
    C:/Strawberry/README.txt
    C:/Strawberry/relocation.txt
 d  C:/Strawberry/win32
[download]

#!/usr/bin/perl -w
use 5.011;
## inspired by https://perlmonks.org/?node_id=1223819
##      my old link to a junction post => https://perlmonks.org/?node_
+id=1178059
## found https://github.com/dagolden/Path-Tiny/issues/160 (which is wh
+ere these functions came from)
##      added the -d and -l tests
use Path::Tiny;
use Win32API::File qw'GetFileAttributes :FILE_ATTRIBUTE_';

for my $p (glob('C:/Users/tblaz/*'), glob('C:/Strawberry/*') ) {
    print is_junction($p) ? "J" : " ";
    print -d($p) ? "d" : " ";
    print -l($p) ? "l" : " ";
    #print f32attr($p);
    #print isjunc($p) ? " j " : "   ";
    print " $p\n"
}

sub is_junction {
    my ($dir) = @_;
    state $last_parent;
    state $junction_by;
    my $path = path($dir);
    if (! $path->is_dir || $path->is_rootdir) {
        return 0;
    }
    if (! defined $last_parent || $path->parent ne $last_parent) {
        $junction_by = { map { $_ => 1 } list_junctions($path->parent)
+ };
            use Data::Dumper; print Dumper $junction_by; no Data::Dump
+er;
        $last_parent = $path->parent;
    }
    return exists $junction_by->{$path->basename};
}

sub list_junctions {
    my ($dir) = @_;
    my $path = path($dir);
    if (! $path->is_dir) {
        return ();
    }
    my $cmd = sprintf 'dir /AL /B "%s" 2>&1', $path->canonpath;
    my @lines = `$cmd`;
    chomp @lines;
    if ($? >> 8) {
        if ($lines[0] eq 'File Not Found') {
            return ();
        } else {
            die "Failed to execute: $cmd";
        }
    }
    return @lines;
}

__END__
[download]

You post code for the functions I commented out. Where is that supposed to go? I have:

cpan> install Win32API::File
Win32API::File is up to date (0.1203).

cpan>
[download]

My module-finding script works despite the complaints to STDOUT, showing a few different places where they end up. I could hardly believe how many matches I got from File.pm:

C:/Strawberry/cpan/build/LWP-Online-1.08-0/inc/Module/Install/Makefile
+.pm
    Makefile.pm
access age in days: 8.24
...
C:/Strawberry/perl/lib/Win32API/File.pm
    File.pm
access age in days: 8.25
...

C:/Strawberry/perl/vendor/lib/Win32/File.pm
    File.pm
access age in days: 8.25
[download]

Now for the questions.

Q1 Where does the code for the is_junc and f32attr subs go?

Q2 Am I correct to surmise that File::Find is essentially broken for windows? (Others may say windows is broken without the point being different.)

With this coming from the terminal:

C:\Users\tblaz>dir /AL
 Volume in drive C is Windows
 Volume Serial Number is ECCC-9917

 Directory of C:\Users\tblaz

08/06/2019  02:22 AM    <JUNCTION>     Application Data [C:\Users\tbla
+z\AppData\Roaming]
08/06/2019  02:22 AM    <JUNCTION>     Cookies [C:\Users\tblaz\AppData
+\Local\Microsoft\Windows\INetCookies]
08/06/2019  02:22 AM    <JUNCTION>     Local Settings [C:\Users\tblaz\
+AppData\Local]
08/06/2019  02:22 AM    <JUNCTION>     My Documents [C:\Users\tblaz\Do
+cuments]
...
08/06/2019  02:22 AM    <JUNCTION>     Start Menu [C:\Users\tblaz\AppD
+ata\Roaming\Microsoft\Windows\Start Menu]
08/06/2019  02:22 AM    <JUNCTION>     Templates [C:\Users\tblaz\AppDa
+ta\Roaming\Microsoft\Windows\Templates]
               0 File(s)              0 bytes
              10 Dir(s)  459,449,827,328 bytes free

C:\Users\tblaz>dir /AL /B
Application Data
Cookies
Local Settings
My Documents
NetHood
PrintHood
Recent
SendTo
Start Menu
Templates

C:\Users\tblaz>dir /AL /B My*
My Documents

C:\Users\tblaz>
[download]

Q3) What is the simplest way to test whether a file is a junction, and if it is, simply ignore it whilst recursing through the rest of them?