help: check early if we have a command, if not try a documentation topic

diff --git a/git-send-email.perl b/git-send-email.perl
index 1e1d98656d645371612cac02abad4ea33757d40e..0b04ba32f0399d338be587ac2d9ad4620705c9a1 100755 (executable)
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -209,6 +209,7 @@ sub format_2822_time {
     "bcc" => \@bcclist,
     "aliasesfile" => \@alias_files,
     "suppresscc" => \@suppress_cc,
+    "envelopesender" => \$envelope_sender,
 );
 
 # Handle Uncouth Termination
@@ -441,7 +442,7 @@ sub read_config {
        }
 
        my $to = $_;
-       push @to, split /,/, $to;
+       push @to, split /,\s*/, $to;
        $prompting++;
 }
 
@@ -521,8 +522,30 @@ sub expand_aliases {
        open(C,"<",$compose_filename)
                or die "Failed to open $compose_filename : " . $!;
 
+       my $need_8bit_cte = file_has_nonascii($compose_filename);
+       my $in_body = 0;
        while(<C>) {
                next if m/^GIT: /;
+               if (!$in_body && /^\n$/) {
+                       $in_body = 1;
+                       if ($need_8bit_cte) {
+                               print C2 "MIME-Version: 1.0\n",
+                                        "Content-Type: text/plain; ",
+                                          "charset=utf-8\n",
+                                        "Content-Transfer-Encoding: 8bit\n";
+                       }
+               }
+               if (!$in_body && /^MIME-Version:/i) {
+                       $need_8bit_cte = 0;
+               }
+               if (!$in_body && /^Subject: ?(.*)/i) {
+                       my $subject = $1;
+                       $_ = "Subject: " .
+                               ($subject =~ /[^[:ascii:]]/ ?
+                                quote_rfc2047($subject) :
+                                $subject) .
+                               "\n";
+               }
                print C2 $_;
        }
        close(C);
@@ -613,6 +636,14 @@ sub unquote_rfc2047 {
        return wantarray ? ($_, $encoding) : $_;
 }
 
+sub quote_rfc2047 {
+       local $_ = shift;
+       my $encoding = shift || 'utf-8';
+       s/([^-a-zA-Z0-9!*+\/])/sprintf("=%02X", ord($1))/eg;
+       s/(.*)/=\?$encoding\?q\?$1\?=/;
+       return $_;
+}
+
 # use the simplest quoting being able to handle the recipient
 sub sanitize_address
 {
@@ -630,13 +661,12 @@ sub sanitize_address
 
        # rfc2047 is needed if a non-ascii char is included
        if ($recipient_name =~ /[^[:ascii:]]/) {
-               $recipient_name =~ s/([^-a-zA-Z0-9!*+\/])/sprintf("=%02X", ord($1))/eg;
-               $recipient_name =~ s/(.*)/=\?utf-8\?q\?$1\?=/;
+               $recipient_name = quote_rfc2047($recipient_name);
        }
 
        # double quotes are needed if specials or CTLs are included
        elsif ($recipient_name =~ /[][()<>@,;:\\".\000-\037\177]/) {
-               $recipient_name =~ s/(["\\\r])/\\$1/;
+               $recipient_name =~ s/(["\\\r])/\\$1/g;
                $recipient_name = "\"$recipient_name\"";
        }
 
@@ -959,3 +989,13 @@ sub validate_patch {
        }
        return undef;
 }
+
+sub file_has_nonascii {
+       my $fn = shift;
+       open(my $fh, '<', $fn)
+               or die "unable to open $fn: $!\n";
+       while (my $line = <$fh>) {
+               return 1 if $line =~ /[^[:ascii:]]/;
+       }
+       return 0;
+}