> In which case you will end up with use warnings on the same line as the > shebang line, no? which will look strange in the debugger
Actually I find this pretty idiomatic, look:
use warnings; #!/usr/bin/perl -w
No? :-) Besides this line is seldom debugged anyway (at least in my
experience) because the programmer typically sets a breakpoint with
"$DB::single=1;" directly in his/her CGI.
The other problem is that I cannot Do The Right Thing while keeping
the current API intact. I propose the attached patch as an alternative,
but it rips the ModPerl::RegistryCooker->rewrite_shebang() method
apart (hopefully nobody depends on it yet, as it is undocumented).
> I wonder if it'd be cleaner to use the '#line number filename'
> directive.
Actually this is what is currently done, but *before*
->rewrite_shebang() fiddles with the first line, which results in an
off-by-one.
Index: ModPerl-Registry/lib/ModPerl/RegistryCooker.pm
===================================================================
--- ModPerl-Registry/lib/ModPerl/RegistryCooker.pm (revision 157426)
+++ ModPerl-Registry/lib/ModPerl/RegistryCooker.pm (working copy)
@@ -371,7 +371,7 @@
return $rc unless $rc == Apache::OK;
# convert the shebang line opts into perl code
- $self->rewrite_shebang;
+ my $shebang = $self->shebang_to_perl;
# mod_cgi compat, should compile the code while in its dir, so
# relative require/open will work.
@@ -397,6 +397,7 @@
"sub handler {",
"local \$0 = '$script_name';",
$nph,
+ $shebang,
$line,
${ $self->{CODE} },
"\n}"; # last line comment without newline?
@@ -553,13 +554,13 @@
}
#########################################################################
-# func: rewrite_shebang
-# dflt: rewrite_shebang
+# func: shebang_to_perl
+# dflt: shebang_to_perl
# desc: parse the shebang line and convert command line switches
# (defined in %switches) into a perl code.
# args: $self - registry blessed object
-# rtrn: nothing
-# efct: the CODE field gets adjusted
+# rtrn: a Perl snippet to be put at the beginning of the CODE field
+# by caller
#########################################################################
my %switches = (
@@ -572,7 +573,7 @@
'w' => sub { "use warnings;\n" },
);
-sub rewrite_shebang {
+sub shebang_to_perl {
my $self = shift;
my($line) = ${ $self->{CODE} } =~ /^(.*)$/m;
my @cmdline = split /\s+/, $line;
@@ -588,7 +589,8 @@
$prepend .= $switches{$_}->();
}
}
- ${ $self->{CODE} } =~ s/^/$prepend/ if $prepend;
+
+ return $prepend;
}
#########################################################################
--
Dominique QUATRAVAUX Ingénieur senior
01 44 42 00 08 IDEALX
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