我发现下面的代码示例在这里。它搜索文件中的文本,并通过子目录递归,但是我想指定要通过其递归的第一级子目录的子集。
例如,假设我在目录中C:\
包含的目录bin
,src
以及Windows
,我想递归搜索.h
和.c
文件包含文本“包括”,我会运行与下面的MWE,我的代码是在下面textsearch.pl
:
perl textsearch.pl include "(\.)(h|c)($)"
我如何修改这个程序只在搜索bin
和src
,但不会Windows
,而在同一时间还是在递归到子目录bin
和src
?即我希望能够执行以下操作:
perl textsearch.pl include "(\.)(h|c)($)" src,bin
我以为File::Find::Rule
会有所帮助,但是在弄清楚如何在这里应用它时遇到了麻烦。
另外,如果还有另一种更简单的方法来执行所有这些操作,我很想听听。
我发现的MWE:
use strict;
use warnings;
use Cwd;
use File::Find;
use File::Basename;
my ($in_rgx,$in_files,$simple,$matches,$cwd);
sub trim($) {
my $string = shift;
$string =~ s/[\r\n]+//g;
$string =~ s/\s+$//;
return $string;
}
# 1: Get input arguments
if ($#ARGV == 0) { # *** ONE ARGUMENT *** (search pattern)
($in_rgx,$in_files,$simple) = ($ARGV[0],".",1);
}
elsif ($#ARGV == 1) { # *** TWO ARGUMENTS *** (search pattern + filename or flag)
if (($ARGV[1] eq '-e') || ($ARGV[1] eq '-E')) { # extended
($in_rgx,$in_files,$simple) = ($ARGV[0],".",0);
}
else { # simple
($in_rgx,$in_files,$simple) = ($ARGV[0],$ARGV[1],1);
}
}
elsif ($#ARGV == 2) { # *** THREE ARGUMENTS *** (search pattern + filename + flag)
($in_rgx,$in_files,$simple) = ($ARGV[0],$ARGV[1],0);
}
else { # *** HELP *** (either no arguments or more than three)
print "Usage: ".basename($0)." regexpattern [filepattern] [-E]\n\n" .
"Hints:\n" .
"*) If you need spaces in your pattern, put quotation marks around it.\n" .
"*) To do a case insensitive match, use (?i) preceding the pattern.\n" .
"*) Both patterns are regular expressions, allowing powerful searches.\n" .
"*) The file pattern is always case insensitive.\n";
exit;
}
if ($in_files eq '.') { # 2: Output search header
print basename($0).": Searching all files for \"${in_rgx}\"... (".(($simple) ? "simple" : "extended").")\n";
}
else {
print basename($0).": Searching files matching \"${in_files}\" for \"${in_rgx}\"... (".(($simple) ? "simple" : "extended").")\n";
}
if ($simple) { print "\n"; } # 3: Traverse directory tree using subroutine 'findfiles'
($matches,$cwd) = (0,cwd);
$cwd =~ s,/,\\,g;
find(\&findfiles, $cwd);
sub findfiles { # 4: Used to iterate through each result
my $file = $File::Find::name; # complete path to the file
$file =~ s,/,\\,g; # substitute all / with \
return unless -f $file; # process files (-f), not directories
return unless $_ =~ m/$in_files/io; # check if file matches input regex
# /io = case-insensitive, compiled
# $_ = just the file name, no path
# 5: Open file and search for matching contents
open F, $file or print "\n* Couldn't open ${file}\n\n" && return;
if ($simple) { # *** SIMPLE OUTPUT ***
while (<F>) {
if (m/($in_rgx)/o) { # /o = compile regex
# file matched!
$matches++;
print "---" . # begin printing file header
sprintf("%04d", $matches) . # file number, padded with 4 zeros
"--- ".$file."\n"; # file name, keep original name
# end of file header
last; # go on to the next file
}
}
} # *** END OF SIMPLE OUTPUT ***
else { # *** EXTENDED OUTPUT ***
my $found = 0; # used to keep track of first match
my $binary = (-B $file) ? 1 : 0; # don't show contents if file is bin
$file =~ s/^\Q$cwd//g; # remove current working directory
# \Q = quotemeta, escapes string
while (<F>) {
if (m/($in_rgx)/o) { # /o = compile regex
# file matched!
if (!$found) { # first matching line for the file
$found = 1;
$matches++;
print "\n---" . # begin printing file header
sprintf("%04d", $matches) . # file number, padded with 4 zeros
"--- ".uc($file)."\n"; # file name, converted to uppercase
# end of file header
if ($binary) { # file is binary, do not show content
print "Binary file.\n";
last;
}
}
print "[$.]".trim($_)."\n"; # print line number and contents
#last; # uncomment to only show first line
}
}
} # *** END OF EXTENDED OUTPUT ***
# 6: Close the file and move on to the next result
close F;
}
#7: Show search statistics
print "\nMatches: ${matches}\n";
# Search Engine Source: http://www.adp-gmbh.ch/perl/find.html
# Rewritten by Christopher Hilding, Dec 02 2006
# Formatting adjusted to my liking by Rene Nyffenegger, Dec 22 2006
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