compat: Add simplified merge sort implementation from glibc

diff --git a/git-send-email.perl b/git-send-email.perl
index 76baa8e431e082c1e36eb9c78125094de0b8a85e..a1a9d14b00d01844509a87c598314e2ffbbfa47c 100755 (executable)
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -100,6 +100,8 @@ sub usage {
 
    --envelope-sender   Specify the envelope sender used to send the emails.
 
+   --no-validate       Don't perform any sanity checks on patches.
+
 EOT
        exit(1);
 }
@@ -177,6 +179,7 @@ sub format_2822_time {
 my ($thread, $chain_reply_to, $suppress_from, $signed_off_cc, $cc_cmd);
 my ($smtp_server, $smtp_server_port, $smtp_authuser, $smtp_authpass, $smtp_ssl);
 my ($identity, $aliasfiletype, @alias_files, @smtp_host_parts);
+my ($no_validate);
 
 my %config_bool_settings = (
     "thread" => [\$thread, 1],
@@ -222,6 +225,7 @@ sub format_2822_time {
                    "dry-run" => \$dry_run,
                    "envelope-sender=s" => \$envelope_sender,
                    "thread!" => \$thread,
+                   "no-validate" => \$no_validate,
         );
 
 unless ($rc) {
@@ -314,6 +318,40 @@ sub read_config {
 
 ($sender) = expand_aliases($sender) if defined $sender;
 
+# Now that all the defaults are set, process the rest of the command line
+# arguments and collect up the files that need to be processed.
+for my $f (@ARGV) {
+       if (-d $f) {
+               opendir(DH,$f)
+                       or die "Failed to opendir $f: $!";
+
+               push @files, grep { -f $_ } map { +$f . "/" . $_ }
+                               sort readdir(DH);
+
+       } elsif (-f $f) {
+               push @files, $f;
+
+       } else {
+               print STDERR "Skipping $f - not found.\n";
+       }
+}
+
+if (!$no_validate) {
+       foreach my $f (@files) {
+               my $error = validate_patch($f);
+               $error and die "fatal: $f: $error\nwarning: no patches were sent\n";
+       }
+}
+
+if (@files) {
+       unless ($quiet) {
+               print $_,"\n" for (@files);
+       }
+} else {
+       print STDERR "\nNo patch files specified!\n\n";
+       usage();
+}
+
 my $prompting = 0;
 if (!defined $sender) {
        $sender = $repoauthor || $repocommitter;
@@ -367,8 +405,10 @@ sub expand_aliases {
        } while (!defined $_);
 
        $initial_reply_to = $_;
-       $initial_reply_to =~ s/^\s+<?/</;
-       $initial_reply_to =~ s/>?\s+$/>/;
+}
+if (defined $initial_reply_to && $_ ne "") {
+       $initial_reply_to =~ s/^\s*<?/</;
+       $initial_reply_to =~ s/>?\s*$/>/;
 }
 
 if (!defined $smtp_server) {
@@ -398,7 +438,7 @@ sub expand_aliases {
        close(C);
 
        my $editor = $ENV{GIT_EDITOR} || $repo->config("core.editor") || $ENV{VISUAL} || $ENV{EDITOR} || "vi";
-       system($editor, $compose_filename);
+       system('sh', '-c', '$0 $@', $editor, $compose_filename);
 
        open(C2,">",$compose_filename . ".final")
                or die "Failed to open $compose_filename.final : " . $!;
@@ -422,35 +462,7 @@ sub expand_aliases {
                exit(0);
        }
 
-       @files = ($compose_filename . ".final");
-}
-
-
-# Now that all the defaults are set, process the rest of the command line
-# arguments and collect up the files that need to be processed.
-for my $f (@ARGV) {
-       if (-d $f) {
-               opendir(DH,$f)
-                       or die "Failed to opendir $f: $!";
-
-               push @files, grep { -f $_ } map { +$f . "/" . $_ }
-                               sort readdir(DH);
-
-       } elsif (-f $f) {
-               push @files, $f;
-
-       } else {
-               print STDERR "Skipping $f - not found.\n";
-       }
-}
-
-if (@files) {
-       unless ($quiet) {
-               print $_,"\n" for (@files);
-       }
-} else {
-       print STDERR "\nNo patch files specified!\n\n";
-       usage();
+       @files = ($compose_filename . ".final", @files);
 }
 
 # Variables we set as part of the loop over files
@@ -578,7 +590,7 @@ sub send_message
                $ccline = "\nCc: $cc";
        }
        my $sanitized_sender = sanitize_address($sender);
-       make_message_id();
+       make_message_id() unless defined($message_id);
 
        my $header = "From: $sanitized_sender
 To: $to${ccline}
@@ -716,6 +728,9 @@ sub send_message
                                        }
                                        push @xh, $_;
                                }
+                               elsif (/^Message-Id: (.*)/i) {
+                                       $message_id = $1;
+                               }
                                elsif (!/^Date:\s/ && /^[-A-Za-z]+:\s+\S/) {
                                        push @xh, $_;
                                }
@@ -803,6 +818,7 @@ sub send_message
                        $references = "$message_id";
                }
        }
+       $message_id = undef;
 }
 
 if ($compose) {
@@ -832,3 +848,15 @@ (@)
        }
        return @emails;
 }
+
+sub validate_patch {
+       my $fn = shift;
+       open(my $fh, '<', $fn)
+               or die "unable to open $fn: $!\n";
+       while (my $line = <$fh>) {
+               if (length($line) > 998) {
+                       return "$.: patch contains a line longer than 998 characters";
+               }
+       }
+       return undef;
+}