cli: add --include-html option to notmuch show
Tomi Ollila
tomi.ollila at iki.fi
Sun Aug 18 11:30:56 PDT 2013
On Sun, Aug 18 2013, Jani Nikula <jani at nikula.org> wrote:
> On Sat, 17 Aug 2013, John Lenz <lenz at math.uic.edu> wrote:
>> On Sun Aug 4 14:47 -0500 2013, Tomi Ollila <tomi.ollila at iki.fi> wrote:
>>> The next question is should we have new option as
>>>
>>> --include-html
>>>
>>> or as
>>>
>>> --include-html=(true|false)
>>>
>>> or even
>>>
>>> --body=(true|false|text-and-html)
>>>
>>> See --exclude option in http://notmuchmail.org/manpages/notmuch-search-1/
>>> and --body option in http://notmuchmail.org/manpages/notmuch-show-1/
>>> for comparison...
>>>
>>
>> I have no preference here, although I guess I would vote for
>> --include-html=(true|false) since adding it to --body makes the --body
>> options confusing: to make sense the body options should be
>> --body=(text|text-and-html|none) but of course you can't change that and
>> break the command line API. Well, maybe you could add all three
>> --body=(text|text-and-html|none) and still accept true/false for
>> compatibility.
>
> Hi John & Tomi -
>
> We could trivially amend the argument parser to |= the keyword values
> (instead of =) to allow specifying keywords arguments multiple times on
> the command line. With the keyword values specified as bit flags, we
> could then have 'notmuch show --body=text --body=html ...' return both
> text and html, and allow trivial future extension too.
>
> --body=true and --body=false could be handled specially for backwards
> compatibility, for example by forcing text only or no parts,
> respectively. Since the default is currently text, --body=none might be
> a suitable synonym for --body=false, while the boolean alternatives
> could be deprecated.
>
> A little less trivially it's also possible to support e.g. comma
> separated keyword values, such as --body=text,html but I do prefer the
> (implementation) simplicity of the above.
I've also thought along these lines (except this possibility to give
argument multiple times)...
But when I wrote my first reply I did not realise that the default
behaviour is to include all text/* parts *except* text/html. i.e.
text/html is excluded as as special case (and non-excluded parts
contain text/plain, text/calendar, text/whatnot etc...).
How to do clean interface/implementation using --body is not trivial
(if possible). I played with options like
false/none -- true/text/plain -- all/textall/* and came to a conclusion
that maybe --include-html is the best option after all.
Now, if we have --include-html should it be like that or
--include-html=(true|false). Currently we have both cases, adding
--verify, --decrypt, --create-folder, --batch, -no-hooks to the
set... I cannot get a clear opinion (without wast^H^H^H^H spending
excessive amount of time figuring these out) how this should be,
therefore I'm inclined to the opinion that
the current patch from John with simple --include-html could be applied,
and in the future (if it is of anyone's interest) we update the parser
allowing boolean --arg equal --arg=true. Then it is just how we decide
to document these...
Tomi
>
> Untested patch to the argument parser below.
>
> Cheers,
> Jani.
>
>
> diff --git a/command-line-arguments.c b/command-line-arguments.c
> index bf9aeca..c426054 100644
> --- a/command-line-arguments.c
> +++ b/command-line-arguments.c
> @@ -23,7 +23,10 @@ _process_keyword_arg (const notmuch_opt_desc_t *arg_desc, char next, const char
> while (keywords->name) {
> if (strcmp (arg_str, keywords->name) == 0) {
> if (arg_desc->output_var) {
> - *((int *)arg_desc->output_var) = keywords->value;
> + if (arg_desc->opt_type == NOTMUCH_OPT_KEYWORD_FLAGS)
> + *((int *)arg_desc->output_var) |= keywords->value;
> + else
> + *((int *)arg_desc->output_var) = keywords->value;
> }
> return TRUE;
> }
> @@ -146,6 +149,7 @@ parse_option (const char *arg,
>
> switch (try->opt_type) {
> case NOTMUCH_OPT_KEYWORD:
> + case NOTMUCH_OPT_KEYWORD_FLAGS:
> return _process_keyword_arg (try, next, value);
> break;
> case NOTMUCH_OPT_BOOLEAN:
> diff --git a/command-line-arguments.h b/command-line-arguments.h
> index de1734a..085a492 100644
> --- a/command-line-arguments.h
> +++ b/command-line-arguments.h
> @@ -8,6 +8,7 @@ enum notmuch_opt_type {
> NOTMUCH_OPT_BOOLEAN, /* --verbose */
> NOTMUCH_OPT_INT, /* --frob=8 */
> NOTMUCH_OPT_KEYWORD, /* --format=raw|json|text */
> + NOTMUCH_OPT_KEYWORD_FLAGS, /* the above with values OR'd together */
> NOTMUCH_OPT_STRING, /* --file=/tmp/gnarf.txt */
> NOTMUCH_OPT_POSITION /* notmuch dump pos_arg */
> };
>
>
>
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