#!/usr/local/bin/perl

use Config;
use File::Basename qw(&basename &dirname);

# List explicitly here the variables you want Configure to
# generate.  Metaconfig only looks for shell variables, so you
# have to mention them as if they were shell variables, not
# %Config entries.  Thus you write
#  $startperl
# to ensure Configure will look for $Config{startperl}.

# This forces PL files to create target in same directory as PL file.
# This is so that make depend always knows where to find PL derivatives.
chdir(dirname($0));
($file = basename($0)) =~ s/\.PL$//;
$file =~ s/\.pl$//
	if ($^O eq 'VMS' or $^O eq 'os2');  # "case-forgiving"

open OUT,">$file" or die "Can't create $file: $!";

print "Extracting $file (with variable substitutions)\n";

# In this section, perl variables will be expanded during extraction.
# You can use $Config{...} to use Configure variables.

print OUT <<"!GROK!THIS!";
$Config{'startperl'}
    eval 'exec perl -S \$0 "\$@"'
	if 0;
!GROK!THIS!

# In the following, perl variables are not expanded during extraction.

print OUT <<'!NO!SUBS!';

use Config;
use Getopt::Std;

BEGIN {
	eval "use Mail::Send;";
	$::HaveSend = ($@ eq "");
	eval "use Mail::Util;";
	$::HaveUtil = ($@ eq "");
};


use strict;

sub paraprint;


my($Version) = "1.14";

# Changed in 1.06 to skip Mail::Send and Mail::Util if not available.
# Changed in 1.07 to see more sendmail execs, and added pipe output.
# Changed in 1.08 to use correct address for sendmail.
# Changed in 1.09 to close the REP file before calling it up in the editor.
#                 Also removed some old comments duplicated elsewhere.
# Changed in 1.10 to run under VMS without Mail::Send; also fixed
#                 temp filename generation.
# Changed in 1.11 to clean up some text and removed Mail::Send deactivator.
# Changed in 1.12 to check for editor errors, make save/send distinction
#                 clearer and add $ENV{REPLYTO}.
# Changed in 1.13 to hopefully make it more difficult to accidentally
#                 send mail
# Changed in 1.14 to make the prompts a little more clear on providing
#                 helpful information. Also let file read fail gracefully.

# TODO: Allow the user to re-name the file on mail failure, and
#       make sure failure (transmission-wise) of Mail::Send is 
#       accounted for.

my( $file, $usefile, $cc, $address, $perlbug, $testaddress, $filename,
    $subject, $from, $verbose, $ed, 
    $fh, $me, $Is_VMS, $msg, $body, $andcc );

Init();

if($::opt_h) { Help(); exit; }

if(!-t STDIN) {
	paraprint <<EOF;
Please use perlbug interactively. If you want to 
include a file, you can use the -f switch.
EOF
	die "\n";
}

if($::opt_d or !-t STDOUT) { Dump(*STDOUT); exit; }

Query();
Edit() unless $usefile;
NowWhat();
Send();

exit;

sub Init {
 
	# -------- Setup --------

	$Is_VMS = $^O eq 'VMS';

	getopts("dhva:s:b:f:r:e:SCc:t");
	

	# This comment is needed to notify metaconfig that we are
	# using the $perladmin, $cf_by, and $cf_time definitions.


	# -------- Configuration ---------
	
	# perlbug address
	$perlbug = 'perlbug@perl.com';
	
	# Test address
	$testaddress = 'perlbug-test@perl.com';
	
	# Target address
	$address = $::opt_a || ($::opt_t ? $testaddress : $perlbug);

	# Possible administrator addresses, in order of confidence
	# (Note that cf_email is not mentioned to metaconfig, since
	# we don't really want it. We'll just take it if we have to.)
	$cc = ($::opt_C ? "" : (
		$::opt_c || $::Config{perladmin} || $::Config{cf_email} || $::Config{cf_by}
		));
	
	# Users address, used in message and in Reply-To header
	$from = $::opt_r || "";

	# Include verbose configuration information
	$verbose = $::opt_v || 0;

	# Subject of bug-report message
	$subject = $::opt_s || "";

	# Send a file
	$usefile = ($::opt_f || 0);
	
	# File to send as report
	$file = $::opt_f || "";

	# Body of report
	$body = $::opt_b || "";

	# Editor
	$ed = (	$::opt_e || $ENV{VISUAL} || $ENV{EDITOR} || $ENV{EDIT} || 
		      ($Is_VMS ? "edit/tpu" : "vi")
	      );
	      
      
	# My username
	$me = getpwuid($<);

}


sub Query {

	# Explain what perlbug is
	
	paraprint <<EOF;
This program provides an easy way to create a message reporting a bug in
perl, and e-mail it to $address.

EOF


	# Prompt for subject of message, if needed
	if(! $subject) {
		paraprint <<EOF;
First of all, please provide a subject for the 
message. It should be a concise description of 
the bug or problem.

EOF
		print "Subject: ";
	
		$subject = <>;
		chop $subject;
	
		my($err)=0;
		while( $subject =~ /^\s*$/ ) {
			print "\nPlease enter a subject: ";
			$subject = <>;
			chop $subject;
			if($err++>5) {
				die "Aborting.\n";
			}
		}
	}
	

	# Prompt for return address, if needed
	if( !$from) {

		# Try and guess return address
		my($domain);
		
		if($::HaveUtil) {
			$domain = Mail::Util::maildomain();
		} elsif ($Is_VMS) {
			require Sys::Hostname;
			$domain = Sys::Hostname::hostname();
		} else {
			$domain = `hostname`.".".`domainname`;
			$domain =~ s/[\r\n]+//g;
		}
	    
	    my($guess);
	                     
	        if( !$domain) {
	        	$guess = "";
	        } elsif ($Is_VMS && !$::Config{'d_socket'}) { 
	        	$guess = "$domain\:\:$me";
	        } else {
		    	$guess = "$me\@$domain" if $domain;
		    	$guess = "$me\@unknown.addresss" unless $domain;
			}
			
		$guess = $ENV{'REPLYTO'} if defined($ENV{'REPLYTO'});
		$guess = $ENV{"REPLY-TO"} if defined($ENV{'REPLY-TO'});
	
		if( $guess ) {
			paraprint <<EOF;


Your e-mail address will be useful if you need to be contacted. If the
default shown is not your full internet e-mail address, please correct it.

EOF
		} else {
			paraprint <<EOF;

So that you may be contacted if necessary, please enter 
your full internet e-mail address here.

EOF
		}
		print "Your address [$guess]: ";
	
		$from = <>;
		chop $from;
	
		if($from eq "") { $from = $guess }
	
	}
	
	#if( $from =~ /^(.*)\@(.*)$/ ) {
	#	$mailname = $1;
	#	$maildomain = $2;
	#}

	if( $from eq $cc or $me eq $cc ) {
		# Try not to copy ourselves
		$cc = "yourself";
	}


	# Prompt for administrator address, unless an override was given
	if( !$::opt_C and !$::opt_c ) {
		paraprint <<EOF;


A copy of this report can be sent to your local
perl administrator. If the address is wrong, please 
correct it, or enter 'none' or 'yourself' to not send
a copy.

EOF

		print "Local perl administrator [$cc]: ";
	
		my($entry) = scalar(<>);
		chop $entry;
	
		if($entry ne "") {
			$cc = $entry;
			if($me eq $cc) { $cc = "" }
		}
	
	}

	if($cc =~ /^(none|yourself|me|myself|ourselves)$/i) { $cc = "" }

	$andcc = " and $cc" if $cc;

editor:
	
	# Prompt for editor, if no override is given
	if(! $::opt_e and ! $::opt_f and ! $::opt_b) {
		paraprint <<EOF;


Now you need to supply the bug report. Try to make
the report concise but descriptive. Include any 
relevant detail. If you are reporting something
that does not work as you think it should, please
try to include example of both the actual 
result, and what you expected.

Some information about your local
perl configuration will automatically be included 
at the end of the report. If you are using any
unusual version of perl, please try and confirm
exactly which versions are relevant.

You will probably want to use an editor to enter
the report. If "$ed" is the editor you want
to use, then just press Enter, otherwise type in
the name of the editor you would like to use.

If you would like to use a prepared file, type
"file", and you will be asked for the filename.

EOF

		print "Editor [$ed]: ";
	
		my($entry) =scalar(<>);
		chop $entry;
		
		$usefile = 0;
		if($entry eq "file") {
			$usefile = 1;
		} elsif($entry ne "") {
			$ed = $entry;
		} 
	}


	# Generate scratch file to edit report in
	
	{
	my($dir) = $Is_VMS ? 'sys$scratch:' : '/tmp/';
	$filename = "bugrep0$$";
	$filename++ while -e "$dir$filename";
	$filename = "$dir$filename";
	}
	
	
	# Prompt for file to read report from, if needed
	
	if( $usefile and ! $file) {
filename:
		paraprint <<EOF;

What is the name of the file that contains your report?

EOF

		print "Filename: ";
	
		my($entry) = scalar(<>);
		chop($entry);

		if($entry eq "") {
			paraprint <<EOF;
			
No filename? I'll let you go back and choose an editor again.			

EOF
			goto editor;
		}
		
		if(!-f $entry or !-r $entry) {
			paraprint <<EOF;
			
I'm sorry, but I can't read from `$entry'. Maybe you mistyped the name of
the file? If you don't want to send a file, just enter a blank line and you
can get back to the editor selection.

EOF
			goto filename;
		}
		$file = $entry;

	}


	# Generate report

	open(REP,">$filename");

	print REP <<EOF;
This is a bug report for perl from $from,
generated with the help of perlbug $Version running under perl $].

EOF

	if($body) {
		print REP $body;
	} elsif($usefile) {
		open(F,"<$file") or die "Unable to read report file from `$file': $!\n";
		while(<F>) {
		print REP $_
		}
		close(F);
	} else {
		print REP "[Please enter your report here]\n";
	}
	
	Dump(*REP);
	close(REP);

}

sub Dump {
	local(*OUT) = @_;
	
	print OUT <<EOF;



Site configuration information for perl $]:

EOF

	if( $::Config{cf_by} and $::Config{cf_time}) {
		print OUT "Configured by $::Config{cf_by} at $::Config{cf_time}.\n\n";
	}

	print OUT Config::myconfig;

	if($verbose) {
		print OUT "\nComplete configuration data for perl $]:\n\n";
		my($value);
		foreach (sort keys %::Config) {
			$value = $::Config{$_};
			$value =~ s/'/\\'/g;
			print OUT "$_='$value'\n";
		}
	}
}

sub Edit {
	# Edit the report

	if($usefile) {
		$usefile = 0;
		paraprint <<EOF;

Please make sure that the name of the editor you want to use is correct.

EOF
		print "Editor [$ed]: ";
		
		my($entry) =scalar(<>);
		chop $entry;
	
		if($entry ne "") {
			$ed = $entry;
		} 
	}
	
tryagain:
	if(!$usefile and !$body) {
		my($sts) = system("$ed $filename");
		if( $Is_VMS ? !($sts & 1) : $sts ) {
			#print "\nUnable to run editor!\n";
			paraprint <<EOF;

The editor you chose (`$ed') could apparently not be run!
Did you mistype the name of your editor? If so, please
correct it here, otherwise just press Enter. 

EOF
			print "Editor [$ed]: ";
		
			my($entry) =scalar(<>);
			chop $entry;
	
			if($entry ne "") {
				$ed = $entry;
				goto tryagain;
			} else {
			
			paraprint <<EOF;

You may want to save your report to a file, so you can edit and mail it
yourself.
EOF
			}
		} 
	}
}

sub NowWhat {

	# Report is done, prompt for further action
	if( !$::opt_S ) {
		while(1) {

			paraprint <<EOF;


Now that you have completed your report, would you like to send 
the message to $address$andcc, display the message on 
the screen, re-edit it, or cancel without sending anything?
You may also save the message as a file to mail at another time.

EOF

			print "Action (Send/Display/Edit/Cancel/Save to File): ";
			my($action) = scalar(<>);
			chop $action;

			if( $action =~ /^(f|sa)/i ) { # <F>ile/<Sa>ve
				print "\n\nName of file to save message in [perlbug.rep]: ";
				my($file) = scalar(<>);
				chop $file;
				if($file eq "") { $file = "perlbug.rep" }
			
				open(FILE,">$file");
				open(REP,"<$filename");
				print FILE "To: $address\nSubject: $subject\n";
				print FILE "Cc: $cc\n" if $cc;
				print FILE "Reply-To: $from\n" if $from;
				print FILE "\n";
				while(<REP>) { print FILE }
				close(REP);
				close(FILE);
	
				print "\nMessage saved in `$file'.\n";
				exit;

			} elsif( $action =~ /^(d|l|sh)/i ) { # <D>isplay, <L>ist, <Sh>ow
				# Display the message
				open(REP,"<$filename");
				while(<REP>) { print $_ }
				close(REP);
			} elsif( $action =~ /^se/i ) { # <S>end
				# Send the message
				print "\
Are you certain you want to send this message?
Please type \"yes\" if you are: ";
				my($reply) = scalar(<STDIN>);
				chop($reply);
				if( $reply eq "yes" ) {
					last;
				} else {
					paraprint <<EOF;

That wasn't a clear "yes", so I won't send your message. If you are sure
your message should be sent, type in "yes" (without the quotes) at the
confirmation prompt.

EOF
					
				}
			} elsif( $action =~ /^[er]/i ) { # <E>dit, <R>e-edit
				# edit the message
				Edit();
				#system("$ed $filename");
			} elsif( $action =~ /^[qc]/i ) { # <C>ancel, <Q>uit
				1 while unlink($filename);  # remove all versions under VMS
				print "\nCancelling.\n";
				exit(0);
			} elsif( $action =~ /^s/ ) {
				paraprint <<EOF;

I'm sorry, but I didn't understand that. Please type "send" or "save".
EOF
			}
		
		}
	}
}


sub Send {

	# Message has been accepted for transmission -- Send the message
	
	if($::HaveSend) {

		$msg = new Mail::Send Subject => $subject, To => $address;
	
		$msg->cc($cc) if $cc;
		$msg->add("Reply-To",$from) if $from;
	    
		$fh = $msg->open;

		open(REP,"<$filename");
		while(<REP>) { print $fh $_ }
		close(REP);
	
		$fh->close;  
	
	} else {
		if ($Is_VMS) {
			if ( ($address =~ /@/ and $address !~ /^\w+%"/) or
			     ($cc      =~ /@/ and $cc      !~ /^\w+%"/) ){
				my($prefix);
				foreach (qw[ IN MX SMTP UCX PONY WINS ],'') {
					$prefix = "$_%",last if $ENV{"MAIL\$PROTOCOL_$_"};
				}
				$address = qq[${prefix}"$address"] unless $address =~ /^\w+%"/;
				$cc = qq[${prefix}"$cc"] unless !$cc || $cc =~ /^\w+%"/;
			}
			$subject =~ s/"/""/g; $address =~ s/"/""/g; $cc =~ s/"/""/g;
			my($sts) = system(qq[mail/Subject="$subject" $filename. "$address","$cc"]);
			if (!($sts & 1)) { die "Can't spawn off mail\n\t(leaving bug report in $filename): $sts\n;" }
		} else {
			my($sendmail) = "";
			
			foreach (qw(/usr/lib/sendmail /usr/sbin/sendmail /usr/ucblib/sendmail))
			{
				$sendmail = $_, last if -e $_;
			}
			
			paraprint <<"EOF" and die "\n" if $sendmail eq "";
			
I am terribly sorry, but I cannot find sendmail, or a close equivalent, and
the perl package Mail::Send has not been installed, so I can't send your bug
report. We apologize for the inconveniencence.

So you may attempt to find some way of sending your message, it has
been left in the file `$filename'.

EOF
			
			open(SENDMAIL,"|$sendmail -t");
			print SENDMAIL "To: $address\n";
			print SENDMAIL "Subject: $subject\n";
			print SENDMAIL "Cc: $cc\n" if $cc;
			print SENDMAIL "Reply-To: $from\n" if $from;
			print SENDMAIL "\n\n";
			open(REP,"<$filename");
			while(<REP>) { print SENDMAIL $_ }
			close(REP);
			
			close(SENDMAIL);
		}
	
	}
	
	print "\nMessage sent.\n";

	1 while unlink($filename);  # remove all versions under VMS

}

sub Help {
	print <<EOF; 

A program to help generate bug reports about perl5, and mail them. 
It is designed to be used interactively. Normally no arguments will
be needed.
	
Usage:
$0  [-v] [-a address] [-s subject] [-b body | -f file ]
    [-r returnaddress] [-e editor] [-c adminaddress | -C] [-S] [-t]
    
Simplest usage:  run "$0", and follow the prompts.

Options:

  -v    Include Verbose configuration data in the report
  -f    File containing the body of the report. Use this to 
        quickly send a prepared message.
  -S    Send without asking for confirmation.
  -a    Address to send the report to. Defaults to `$address'.
  -c    Address to send copy of report to. Defaults to `$cc'.
  -C    Don't send copy to administrator.
  -s    Subject to include with the message. You will be prompted 
        if you don't supply one on the command line.
  -b    Body of the report. If not included on the command line, or
        in a file with -f, you will get a chance to edit the message.
  -r    Your return address. The program will ask you to confirm
        this if you don't give it here.
  -e    Editor to use. 
  -t    Test mode. The target address defaults to `$testaddress'.
  -d	Data mode (the default if you redirect or pipe output.) 
        This prints out your configuration data, without mailing
        anything. You can use this with -v to get more complete data.
  
EOF
}

sub paraprint {
    my @paragraphs = split /\n{2,}/, "@_";
    print "\n\n";
    for (@paragraphs) {   # implicit local $_
    	s/(\S)\s*\n/$1 /g;
	    write;
	    print "\n";
    }
                       
}
                            

format STDOUT =
^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< ~~
$_
.
!NO!SUBS!

close OUT or die "Can't close $file: $!";
chmod 0755, $file or die "Can't reset permissions for $file: $!\n";
exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';