Perl - 正規表現によるテキスト処理(書き戻し編集(コピーライトの追加))

初めてのPerl 第6版
Randal L. Schwartz,
Tom Phoenix, brian d foy 共著
近藤 嘉雪 翻訳

開発環境

• OS X Lion - Apple(OS)
• TextWrangler(Text Editor) (BBEditの機能制限無料版、light版)
• Script言語:Perl

『初めてのPerl 第6版』(Randal L. Schwartz, Tom Phoenix, brian d foy 共著、近藤 嘉雪 訳、オライリー・ジャパン、2012年、ISBN978-4-87311-567-2) の9章(正規表現によるテキスト処理)、9.6(練習問題)5を解いてみる。

5.

コード(TextWrangler)

sample.pl

#!/usr/bin/env perl
## Copyright (C) 2012 by kamimura
use strict;
use warnings;
use utf8;
use 5.012;
binmode STDOUT, ':utf8';
binmode STDIN, ':utf8';

my %files = ();
$files{$_} = 1 for @ARGV;

while(<>){
  delete $files{$ARGV} if /^## Copyright/;
}

@ARGV = keys %files;
$^I = ".bak";
while(<>){
  $_.= "## Copyright (C) 2012 by kamimura\n" if /^#!/;
  print;
}

入出力結果(Terminal)

$ cat sample.pl
#!/usr/bin/env perl
## Copyright (C) 2012 by kamimura
use strict;
use warnings;
use utf8;
use 5.012;
binmode STDOUT, ':utf8';
binmode STDIN, ':utf8';

my %files = ();
$files{$_} = 1 for @ARGV;

while(<>){
  delete $files{$ARGV} if /^## Copyright/;
}

@ARGV = keys %files;
$^I = ".bak";
while(<>){
  $_.= "## Copyright (C) 2012 by kamimura\n" if /^#!/;
  print;
}
$ cat sample.pl.bak
#!/usr/bin/env perl
use strict;
use warnings;
use utf8;
use 5.012;
binmode STDOUT, ':utf8';
binmode STDIN, ':utf8';

$^I = ".bak";
while(<>){
  $_.= "## Copyright (C) 2012 by kamimura\n" if /^#!/;
  print;
}
$ ./sample.pl sample.pl*
$ cat sample.pl sample.pl.bak
#!/usr/bin/env perl
## Copyright (C) 2012 by kamimura
use strict;
use warnings;
use utf8;
use 5.012;
binmode STDOUT, ':utf8';
binmode STDIN, ':utf8';

my %files = ();
$files{$_} = 1 for @ARGV;

while(<>){
  delete $files{$ARGV} if /^## Copyright/;
}

@ARGV = keys %files;
$^I = ".bak";
while(<>){
  $_.= "## Copyright (C) 2012 by kamimura\n" if /^#!/;
  print;
}
#!/usr/bin/env perl
## Copyright (C) 2012 by kamimura
use strict;
use warnings;
use utf8;
use 5.012;
binmode STDOUT, ':utf8';
binmode STDIN, ':utf8';

$^I = ".bak";
while(<>){
  $_.= "## Copyright (C) 2012 by kamimura\n" if /^#!/;
  print;
}
$