[PATCH 1/4] cli: add --body=true|false option to notmuch-show.c

[Austin Clements]

Quoth Mark Walters on Jul 23 at  5:17 pm:
> This option allows the caller to suppress the output of the bodies of
> the messages. Currently this is only implemented for format=json.
> 
> This is used by notmuch-pick.el (although not needed) because it gives
> a speed-up of at least a factor of a two (and in some cases a speed up
> of more than a factor of 8); moreover it reduces the memory usage in
> emacs hugely.
> ---
>  notmuch-client.h |    3 ++-
>  notmuch-reply.c  |    2 +-
>  notmuch-show.c   |   23 +++++++++++++++--------
>  3 files changed, 18 insertions(+), 10 deletions(-)
> 
> diff --git a/notmuch-client.h b/notmuch-client.h
> index 0c17b79..f930798 100644
> --- a/notmuch-client.h
> +++ b/notmuch-client.h
> @@ -87,6 +87,7 @@ typedef struct notmuch_crypto {
>  typedef struct notmuch_show_params {
>      notmuch_bool_t entire_thread;
>      notmuch_bool_t omit_excluded;
> +    notmuch_bool_t output_body;
>      notmuch_bool_t raw;
>      int part;
>      notmuch_crypto_t crypto;
> @@ -176,7 +177,7 @@ notmuch_status_t
>  show_one_part (const char *filename, int part);
>  
>  void
> -format_part_json (const void *ctx, mime_node_t *node, notmuch_bool_t first);
> +format_part_json (const void *ctx, mime_node_t *node, notmuch_bool_t first, notmuch_bool_t output_body);
>  
>  void
>  format_headers_json (const void *ctx, GMimeMessage *message, notmuch_bool_t reply);
> diff --git a/notmuch-reply.c b/notmuch-reply.c
> index 3a038ed..de21f3b 100644
> --- a/notmuch-reply.c
> +++ b/notmuch-reply.c
> @@ -620,7 +620,7 @@ notmuch_reply_format_json(void *ctx,
>      /* Start the original */
>      printf (", \"original\": ");
>  
> -    format_part_json (ctx, node, TRUE);
> +    format_part_json (ctx, node, TRUE, TRUE);
>  
>      /* End */
>      printf ("}\n");
> diff --git a/notmuch-show.c b/notmuch-show.c
> index 8f3c60e..c2ad4fb 100644
> --- a/notmuch-show.c
> +++ b/notmuch-show.c
> @@ -559,7 +559,7 @@ format_part_text (const void *ctx, mime_node_t *node,
>  }
>  
>  void
> -format_part_json (const void *ctx, mime_node_t *node, notmuch_bool_t first)
> +format_part_json (const void *ctx, mime_node_t *node, notmuch_bool_t first, notmuch_bool_t output_body)
>  {
>      /* Any changes to the JSON format should be reflected in the file
>       * devel/schemata. */
> @@ -571,10 +571,12 @@ format_part_json (const void *ctx, mime_node_t *node, notmuch_bool_t first)
>  	printf ("\"headers\": ");
>  	format_headers_json (ctx, GMIME_MESSAGE (node->part), FALSE);
>  
> -	printf (", \"body\": [");
> -	format_part_json (ctx, mime_node_child (node, 0), first);
> -
> -	printf ("]}");
> +	if (output_body) {
> +	    printf (", \"body\": [");
> +	    format_part_json (ctx, mime_node_child (node, 0), first, TRUE);
> +	    printf ("]");
> +	}
> +	printf ("}");
>  	return;
>      }
>  
> @@ -652,16 +654,16 @@ format_part_json (const void *ctx, mime_node_t *node, notmuch_bool_t first)
>      talloc_free (local);
>  
>      for (i = 0; i < node->nchildren; i++)
> -	format_part_json (ctx, mime_node_child (node, i), i == 0);
> +	format_part_json (ctx, mime_node_child (node, i), i == 0, TRUE);
>  
>      printf ("%s}", terminator);
>  }
>  
>  static notmuch_status_t
>  format_part_json_entry (const void *ctx, mime_node_t *node, unused (int indent),
> -			unused (const notmuch_show_params_t *params))
> +			const notmuch_show_params_t *params)
>  {
> -    format_part_json (ctx, node, TRUE);
> +    format_part_json (ctx, node, TRUE, params->output_body);
>  
>      return NOTMUCH_STATUS_SUCCESS;
>  }
> @@ -1004,6 +1006,7 @@ notmuch_show_command (void *ctx, unused (int argc), unused (char *argv[]))
>      notmuch_show_params_t params = {
>  	.part = -1,
>  	.omit_excluded = TRUE,
> +	.output_body = TRUE,
>  	.crypto = {
>  	    .verify = FALSE,
>  	    .decrypt = FALSE
> @@ -1032,6 +1035,7 @@ notmuch_show_command (void *ctx, unused (int argc), unused (char *argv[]))
>  	{ NOTMUCH_OPT_INT, &params.part, "part", 'p', 0 },
>  	{ NOTMUCH_OPT_BOOLEAN, &params.crypto.decrypt, "decrypt", 'd', 0 },
>  	{ NOTMUCH_OPT_BOOLEAN, &params.crypto.verify, "verify", 'v', 0 },
> +	{ NOTMUCH_OPT_BOOLEAN, &params.output_body, "body", 'h', 0 },

Why 'h' for the short option?

>  	{ 0, 0, 0, 0, 0 }
>      };
>  
> @@ -1086,6 +1090,9 @@ notmuch_show_command (void *ctx, unused (int argc), unused (char *argv[]))
>  	    entire_thread = ENTIRE_THREAD_FALSE;
>      }
>  
> +    if (!params.output_body && format != &format_json)
> +	fprintf (stderr,"Warning: --body=false only implemented for format=json\n");

Missing space after comma.

Should we consider how --part and --body interact?  Maybe specifying
--part is incompatible with --body=false?  Or specifying a part > 0 is
incompatible with --body=false?

> +
>      if (entire_thread == ENTIRE_THREAD_TRUE)
>  	params.entire_thread = TRUE;
>      else