git-send-email: remove invalid addresses earlier

Some addresses are passed twice to unique_email_list() and invalid addresses
may be reported twice per send_message. Now we warn about them earlier
and we also remove invalid addresses.

This also removes using of undefined values for string comparison
for invalid addresses in cc list processing.

Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/git-send-email.perl b/git-send-email.perl
index 356f99d430c80a862759b4543e0edc7d2b759638..5a783ace0588dae9e4fd2666de9ae81ae4d5b1be 100755 (executable)
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -786,9 +786,11 @@ sub expand_one_alias {
 }
 
 @initial_to = expand_aliases(@initial_to);
-@initial_to = (map { sanitize_address($_) } @initial_to);
+@initial_to = validate_address_list(sanitize_address_list(@initial_to));
 @initial_cc = expand_aliases(@initial_cc);
+@initial_cc = validate_address_list(sanitize_address_list(@initial_cc));
 @bcclist = expand_aliases(@bcclist);
+@bcclist = validate_address_list(sanitize_address_list(@bcclist));
 
 if ($thread && !defined $initial_reply_to && $prompting) {
        $initial_reply_to = ask(
@@ -839,6 +841,28 @@ sub extract_valid_address {
        return undef;
 }
 
+sub extract_valid_address_or_die {
+       my $address = shift;
+       $address = extract_valid_address($address);
+       die "error: unable to extract a valid address from: $address\n"
+               if !$address;
+       return $address;
+}
+
+sub validate_address {
+       my $address = shift;
+       if (!extract_valid_address($address)) {
+               print STDERR "W: unable to extract a valid address from: $address\n";
+               return undef;
+       }
+       return $address;
+}
+
+sub validate_address_list {
+       return (grep { defined $_ }
+               map { validate_address($_) } @_);
+}
+
 # Usually don't need to change anything below here.
 
 # we make a "fake" message id by taking the current number
@@ -955,6 +979,10 @@ sub sanitize_address {
 
 }
 
+sub sanitize_address_list {
+       return (map { sanitize_address($_) } @_);
+}
+
 # Returns the local Fully Qualified Domain Name (FQDN) if available.
 #
 # Tightly configured MTAa require that a caller sends a real DNS
@@ -1017,14 +1045,13 @@ sub maildomain {
 
 sub send_message {
        my @recipients = unique_email_list(@to);
-       @cc = (grep { my $cc = extract_valid_address($_);
+       @cc = (grep { my $cc = extract_valid_address_or_die($_);
                      not grep { $cc eq $_ || $_ =~ /<\Q${cc}\E>$/ } @recipients
                    }
-              map { sanitize_address($_) }
               @cc);
        my $to = join (",\n\t", @recipients);
        @recipients = unique_email_list(@recipients,@cc,@bcclist);
-       @recipients = (map { extract_valid_address($_) } @recipients);
+       @recipients = (map { extract_valid_address_or_die($_) } @recipients);
        my $date = format_2822_time($time++);
        my $gitversion = '@@GIT_VERSION@@';
        if ($gitversion =~ m/..GIT_VERSION../) {
@@ -1267,7 +1294,7 @@ foreach my $t (@files) {
                                foreach my $addr (parse_address_line($1)) {
                                        printf("(mbox) Adding to: %s from line '%s'\n",
                                                $addr, $_) unless $quiet;
-                                       push @to, sanitize_address($addr);
+                                       push @to, $addr;
                                }
                        }
                        elsif (/^Cc:\s+(.*)$/) {
@@ -1376,6 +1403,9 @@ foreach my $t (@files) {
                ($confirm =~ /^(?:auto|compose)$/ && $compose && $message_num == 1));
        $needs_confirm = "inform" if ($needs_confirm && $confirm_unconfigured && @cc);
 
+       @to = validate_address_list(sanitize_address_list(@to));
+       @cc = validate_address_list(sanitize_address_list(@cc));
+
        @to = (@initial_to, @to);
        @cc = (@initial_cc, @cc);
 
@@ -1431,14 +1461,10 @@ sub unique_email_list {
        my @emails;
 
        foreach my $entry (@_) {
-               if (my $clean = extract_valid_address($entry)) {
-                       $seen{$clean} ||= 0;
-                       next if $seen{$clean}++;
-                       push @emails, $entry;
-               } else {
-                       print STDERR "W: unable to extract a valid address",
-                                       " from: $entry\n";
-               }
+               my $clean = extract_valid_address_or_die($entry);
+               $seen{$clean} ||= 0;
+               next if $seen{$clean}++;
+               push @emails, $entry;
        }
        return @emails;
 }