How can I use File::Find in Perl?

Question

I'm a bit confused from File::Find documentation... What is the equivalent to $ find my_dir -maxdepth 2 -name "*.txt"?

Answer 1

就个人而言,我更喜欢,File::Find::Rule因为这不需要你创建回调例程.

use strict;
use Data::Dumper;
use File::Find::Rule;

my $dir = shift;
my $level = shift // 2;

my @files = File::Find::Rule->file()
                            ->name("*.txt")
                            ->maxdepth($level)
                            ->in($dir);

print Dumper(\@files);

或者创建一个迭代器:

my $ffr_obj = File::Find::Rule->file()
                              ->name("*.txt")
                              ->maxdepth($level)
                              ->start($dir);

while (my $file = $ffr_obj->match())
{
    print "$file\n"
}

Answer 2

我想我只是使用一个,glob因为你真的不需要所有目录遍历的东西:

 my @files = glob( '*.txt */*.txt' );

我创建了File :: Find :: Closures,以便您轻松创建传递给的回调find:

 use File::Find::Closures qw( find_by_regex );
 use File::Find qw( find );

 my( $wanted, $reporter ) = File::Find::Closures::find_by_regex( qr/\.txt\z/ );

 find( $wanted, @dirs );

 my @files = $reporter->();

通常,您可以将find(1)命令转换为Perl程序find2perl(在v5.20中删除但在CPAN上删除):

% find2perl my_dir -d 2  -name "*.txt"

但显然find2perl不明白-maxdepth,所以你可以放弃它:

% find2perl my_dir -name "*.txt"
#! /usr/local/perls/perl-5.13.5/bin/perl5.13.5 -w
    eval 'exec /usr/local/perls/perl-5.13.5/bin/perl5.13.5 -S $0 ${1+"$@"}'
        if 0; #$running_under_some_shell

use strict;
use File::Find ();

# Set the variable $File::Find::dont_use_nlink if you're using AFS,
# since AFS cheats.

# for the convenience of &wanted calls, including -eval statements:
use vars qw/*name *dir *prune/;
*name   = *File::Find::name;
*dir    = *File::Find::dir;
*prune  = *File::Find::prune;

sub wanted;



# Traverse desired filesystems
File::Find::find({wanted => \&wanted}, 'my_dir');
exit;


sub wanted {
    /^.*\.txt\z/s
    && print("$name\n");
}

现在你已经开始编程,你可以插入你需要的任何其他东西,包括preprocess修剪树的步骤.

Answer 3

use File::Find ; 
use Cwd ; 

my $currentWorkingDir = getcwd;

my @filesToRun = ();
my $filePattern = '*.cmd' ; 
#add only files of type filePattern recursively from the $currentWorkingDir
find( sub { push @filesToRun, $File::Find::name  
                                    if ( m/^(.*)$filePattern$/ ) }, $currentWorkingDir) ;

foreach  my $file ( @filesToRun  ) 
{
    print "$file\n" ;   
}