Perl File :: Find :: Rule从数组中排除目录 [英] Perl File::Find::Rule excluding directories from an array

问题描述

我在数组中有一组目录，

I have a set of directories in an array as

chdir /tmp;
my @dir=("test" "abc" "def")

我正在寻找一种使用File :: Find :: Rule来递归地查找/tmp中的所有文件的方法，但要从@dir中的文件中排除文件.

I am looking for a way using File::Find::Rule to find all files in /tmp recursively, but excluding files from the ones in @dir.

我可以通过

my $rule =  File::Find::Rule->new;
$rule->file;
my @files = $rule->in( @dir );

但是我不能否定条件，即排除@dir.我正在尝试

But I cannot negate the condition, that is to exclude @dir. I was trying

chdir /tmp;
@files = File::Find::Rule->new
    ->file()
    ->name(@dir)
    ->prune
    ->in( "." );

但没有输出.

推荐答案

文档列出了以下示例:

忽略CVS目录

ignore CVS directories

my $rule = File::Find::Rule->new; $rule->or($rule->new
               ->directory
               ->name('CVS')
               ->prune
               ->discard,
          $rule->new);

请注意此处使用空规则.空规则匹配它们看到的任何内容，因此效果是匹配(并丢弃)名为"CVS"的目录或匹配任何内容

Note here the use of a null rule. Null rules match anything they see, so the effect is to match (and discard) directories called 'CVS' or to match anything

您可以probalby做同样的事情:

You could probalby do the same thing:

my @exclude_dirs = qw(test abc def);
my $rule = File::Find::Rule->new; 
$rule->or($rule->new
               ->directory
               ->name(@exclude_dirs)
               ->prune
               ->discard,
          $rule->new);
my @files = $rule->in('/tmp');

---

请考虑以下示例:

---

Consider this example:

foo@bar:~/temp/filefind> tree
.
├── bar
│   ├── bar.txt
│   └── foobar.txt
├── baz.txt
└── foo
    └── foo.txt

2 directories, 4 files

代码如下:

#!/usr/bin/perl
use strictures;
use File::Find::Rule;
use Data::Dump;

my @exclude_dirs = qw(foo);
my $rule = File::Find::Rule->new; 
$rule->or($rule->new
               ->directory
               ->name(@exclude_dirs)
               ->prune
               ->discard,
          $rule->new);
my @files = $rule->in('filefind');
dd \@files;

现在我运行这个:

foo@bar:~/temp> perl file-find.pl
[
  "filefind",
  "filefind/baz.txt",
  "filefind/bar",
  "filefind/bar/bar.txt",
  "filefind/bar/foobar.txt",
]

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