| Commit | Line | Data |
|---|
| e1caacb4 |
1 | #!perl -w |
| 2 | $0 =~ s|\.bat||i; |
| 3 | unless (-f $0) { |
| 4 | $0 =~ s|.*[/\\]||; |
| 5 | for (".", split ';', $ENV{PATH}) { |
| 6 | $_ = "." if $_ eq ""; |
| 7 | $0 = "$_/$0" , goto doit if -f "$_/$0"; |
| 8 | } |
| 9 | die "`$0' not found.\n"; |
| 10 | } |
| 11 | doit: exec "perl", "-x", $0, @ARGV; |
| 12 | die "Failed to exec `$0': $!"; |
| 13 | __END__ |
| 14 | |
| 15 | =head1 NAME |
| 16 | |
| 17 | runperl.bat - "universal" batch file to run perl scripts |
| 18 | |
| 19 | =head1 SYNOPSIS |
| 20 | |
| 21 | C:\> copy runperl.bat foo.bat |
| 22 | C:\> foo |
| 23 | [..runs the perl script `foo'..] |
| 24 | |
| 25 | C:\> foo.bat |
| 26 | [..runs the perl script `foo'..] |
| 27 | |
| 28 | |
| 29 | =head1 DESCRIPTION |
| 30 | |
| 31 | This file can be copied to any file name ending in the ".bat" suffix. |
| 32 | When executed on a DOS-like operating system, it will invoke the perl |
| 33 | script of the same name, but without the ".bat" suffix. It will |
| 34 | look for the script in the same directory as itself, and then in |
| 35 | the current directory, and then search the directories in your PATH. |
| 36 | |
| 37 | It relies on the C<exec()> operator, so you will need to make sure |
| 38 | that works in your perl. |
| 39 | |
| 40 | This method of invoking perl scripts has some advantages over |
| 41 | batch-file wrappers like C<pl2bat.bat>: it avoids duplication |
| 42 | of all the code; it ensures C<$0> contains the same name as the |
| 43 | executing file, without any egregious ".bat" suffix; it allows |
| 44 | you to separate your perl scripts from the wrapper used to |
| 45 | run them; since the wrapper is generic, you can use symbolic |
| 46 | links to simply link to C<runperl.bat>, if you are serving your |
| 47 | files on a filesystem that supports that. |
| 48 | |
| 49 | On the other hand, if the batch file is invoked with the ".bat" |
| 50 | suffix, it does an extra C<exec()>. This may be a performance |
| 51 | issue. You can avoid this by running it without specifying |
| 52 | the ".bat" suffix. |
| 53 | |
| 54 | Perl is invoked with the -x flag, so the script must contain |
| 55 | a C<#!perl> line. Any flags found on that line will be honored. |
| 56 | |
| 57 | =head1 BUGS |
| 58 | |
| 59 | Perl is invoked with the -S flag, so it will search the PATH to find |
| 60 | the script. This may have undesirable effects. |
| 61 | |
| 62 | =head1 SEE ALSO |
| 63 | |
| 64 | perl, perlwin32, pl2bat.bat |
| 65 | |
| 66 | =cut |
| 67 | |
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