Matthieu Moy <matthieu....@grenoble-inp.fr> wrote:
> Samuel GROOT <samuel.gr...@grenoble-inp.org> writes:
>
> > Parsing and processing in send-email is done in the same loop.
> >
> > To make the code more maintainable, we create two subroutines:
> > - `parse_email` to separate header and body
> > - `parse_header` to retrieve data from header
>
> These routines are not specific to git send-email, nor to Git.
>
> Does it make sense to use an external library, like
> http://search.cpan.org/~rjbs/Email-Simple-2.210/lib/Email/Simple.pm ,
> either by depending on it, or by copying it in Git's source tree ?
That might be overkill and increase installation/maintenance
burden. Bundling it would probably be problematic to distros,
too.
> If not, I think it would be better to introduce an email parsing library
> in a dedicated Perl module in perl/ in our source tree, to keep
> git-send-email.perl more focused on the "send-email" logic.
Sounds good, Git.pm already has parse_mailboxes
> > +sub parse_email {
> > + my @header = ();
> > + my @body = ();
> > + my $fh = shift;
> > +
> > + # First unfold multiline header fields
> > + while (<$fh>) {
> > + last if /^\s*$/;
> > + if (/^\s+\S/ and @header) {
> > + chomp($header[$#header]);
> > + s/^\s+/ /;
> > + $header[$#header] .= $_;
> > + } else {
> > + push(@header, $_);
> > + }
> > + }
> > +
> > + # Now unfold the message body
>
> Why "unfold"? Don't you mean "split message body into a list of lines"?
>
> > + while (<$fh>) {
> > + push @body, $_;
> > + }
I'd rather avoid the loops entirely and do this:
local $/ = "\n"; # in case caller clobbers $/
@body = (<$fh>);
> > + return (@header, @body);
> > +}
> > + if (defined $input_format && $input_format eq 'mbox') {
> > + if (/^Subject:\s+(.*)$/i) {
> > + $subject = $1;
> > + } elsif (/^From:\s+(.*)$/i) {
> > + $from = $1;
>
> Not sure we need thes if/elsif/ for generic headers. Email::Simple's API
> seems much simpler and general: $email->header("From");
Right. Reading this, it would've been easier to parse headers into a
hash (normalized keys to lowercase) up front inside parse_email.
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