Re: [notmuch] [PATCH] Add an "--output=(json|text|)" command-line option to both notmuch-search and notmuch-show.

Subject: Re: [notmuch] [PATCH] Add an "--output=(json|text|)" command-line option to both notmuch-search and notmuch-show.

Date: Tue, 23 Feb 2010 11:56:10 -0800



From: Carl Worth

On Fri, 18 Dec 2009 08:59:55 -0400, wrote:
> From: Scott Robinson <>

Hi Scott (and David),

I'm finally getting around to looking closely at the JSON patches
(hurrah!). Here are some comments:

> In the case of notmuch-show, "--output=json" also implies
> "--entire-thread" as the thread structure is implicit in the emitted
> document tree.

I think we've all agreed to use --output for selecting what to print and
to instead use --format for how to format it. I also think David's got a
patch to change that, but if we have to change the current patch anyway,
we might change that at the same time.

> --- /dev/null
> +++ b/json.c
> @@ -0,0 +1,73 @@
> +/* notmuch - Not much of an email program, (just index and search)
> + *
> + * Copyright © 2009 Carl Worth
> + * Copyright © 2009 Keith Packard

I know I didn't contribute any code to this file, so my name shouldn't
be here. Scott, I imagine you have made some non-trivial contributions
so your name (or suitable copyright-claiming entity) should be here.

> + * Authors: Carl Worth <>
> + *	    Keith Packard <>

Same thing here.

> +/*
> + * json_quote_str derived from cJSON's print_string_ptr,
> + * Copyright (c) 2009 Dave Gamble
> + */

Thanks for attributing the source here, but let's please keep all the
copyright statements up at the top of the file.

It would still be reasonable to have a comment at this point that this
particular code came from Dave Gamble and cJSON. But it should also
mention the license under which the code is being integrated.

I suggest leaving the notmuch-standar GPLv3+ blurb at the top of the
file, but then quoting the license itself of the external code, (it's a
short MIT-style license, right?).

> +char *
> +json_quote_str(const void *ctx, const char *str)

It would be nice to have a little comment here describing what the
function does, (what characters get quoted and how, that the return
value is talloced with 'ctx' as a parent, and perhaps a pointer to the
appropriate JSON reference/specification).

But I definitely like this nice little function as opposed to some JSON
library. Thanks!

> +typedef struct search_format {
> +    const char *results_start;
> +    const char *thread_start;
> +    void (*thread) (const void *ctx,
> +		    const char *id,
> +		    const time_t date,
> +		    const int matched,
> +		    const int total,
> +		    const char *authors,
> +		    const char *subject);

Definitely missing at least a quick comment for internal documentation
here as well. But I do like the way this works.

> --- a/notmuch.c
> +++ b/notmuch.c
> @@ -162,6 +162,11 @@ command_t commands[] = {
>        "\n"
>        "\t\tSupported options for search include:\n"
>        "\n"
> +      "\t\t--output=(json|text)\n"
> +      "\n"
> +      "\t\t\tPresents the results in either JSON or plain-text\n"
> +      "\t\t\tformat, which is the default.\n"
> +      "\n"

Thanks for adding the documentation here. But please add to notmuch.1 as

This all looks really great. And I can't wait to apply it and play with
it more.

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