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 be4a20d7cd562e9b00d93fe71313aed70afe50af..0b04ba32f0399d338be587ac2d9ad4620705c9a1 100755 (executable)
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -168,7 +168,8 @@ sub format_2822_time {
 # Example reply to:
 #$initial_reply_to = ''; #<20050203173208.GA23964@foobar.com>';
 
-my $repo = Git->repository();
+my $repo = eval { Git->repository() };
+my @repo = $repo ? ($repo) : ();
 my $term = eval {
        $ENV{"GIT_SEND_EMAIL_NOTTY"}
                ? new Term::ReadLine 'git-send-email', \*STDIN, \*STDOUT
@@ -202,11 +203,13 @@ sub format_2822_time {
     "smtpuser" => \$smtp_authuser,
     "smtppass" => \$smtp_authpass,
     "to" => \@to,
+    "cc" => \@initial_cc,
     "cccmd" => \$cc_cmd,
     "aliasfiletype" => \$aliasfiletype,
     "bcc" => \@bcclist,
     "aliasesfile" => \@alias_files,
     "suppresscc" => \@suppress_cc,
+    "envelopesender" => \$envelope_sender,
 );
 
 # Handle Uncouth Termination
@@ -271,25 +274,25 @@ sub read_config {
 
        foreach my $setting (keys %config_bool_settings) {
                my $target = $config_bool_settings{$setting}->[0];
-               $$target = $repo->config_bool("$prefix.$setting") unless (defined $$target);
+               $$target = Git::config_bool(@repo, "$prefix.$setting") unless (defined $$target);
        }
 
        foreach my $setting (keys %config_settings) {
                my $target = $config_settings{$setting};
                if (ref($target) eq "ARRAY") {
                        unless (@$target) {
-                               my @values = $repo->config("$prefix.$setting");
+                               my @values = Git::config(@repo, "$prefix.$setting");
                                @$target = @values if (@values && defined $values[0]);
                        }
                }
                else {
-                       $$target = $repo->config("$prefix.$setting") unless (defined $$target);
+                       $$target = Git::config(@repo, "$prefix.$setting") unless (defined $$target);
                }
        }
 }
 
 # read configuration from [sendemail "$identity"], fall back on [sendemail]
-$identity = $repo->config("sendemail.identity") unless (defined $identity);
+$identity = Git::config(@repo, "sendemail.identity") unless (defined $identity);
 read_config("sendemail.$identity") if (defined $identity);
 read_config("sendemail");
 
@@ -327,8 +330,9 @@ sub read_config {
        }
 }
 
-my ($repoauthor) = $repo->ident_person('author');
-my ($repocommitter) = $repo->ident_person('committer');
+my ($repoauthor, $repocommitter);
+($repoauthor) = Git::ident_person(@repo, 'author');
+($repocommitter) = Git::ident_person(@repo, 'committer');
 
 # Verify the user input
 
@@ -415,7 +419,7 @@ sub read_config {
 
 my $prompting = 0;
 if (!defined $sender) {
-       $sender = $repoauthor || $repocommitter;
+       $sender = $repoauthor || $repocommitter || '';
 
        while (1) {
                $_ = $term->readline("Who should the emails appear to be from? [$sender] ");
@@ -438,7 +442,7 @@ sub read_config {
        }
 
        my $to = $_;
-       push @to, split /,/, $to;
+       push @to, split /,\s*/, $to;
        $prompting++;
 }
 
@@ -509,8 +513,8 @@ sub expand_aliases {
 EOT
        close(C);
 
-       my $editor = $ENV{GIT_EDITOR} || $repo->config("core.editor") || $ENV{VISUAL} || $ENV{EDITOR} || "vi";
-       system('sh', '-c', '$0 $@', $editor, $compose_filename);
+       my $editor = $ENV{GIT_EDITOR} || Git::config(@repo, "core.editor") || $ENV{VISUAL} || $ENV{EDITOR} || "vi";
+       system('sh', '-c', $editor.' "$@"', $editor, $compose_filename);
 
        open(C2,">",$compose_filename . ".final")
                or die "Failed to open $compose_filename.final : " . $!;
@@ -518,8 +522,30 @@ sub expand_aliases {
        open(C,"<",$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 $_;
        }
        close(C);
@@ -610,6 +636,14 @@ sub unquote_rfc2047 {
        return wantarray ? ($_, $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
 {
@@ -627,13 +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\"";
        }
 
@@ -956,3 +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;
+}