cli/show: detangle overloading of params.part for single message display

The use of params.part has become rather convoluted in notmuch
show. Add another variable for selecting single message display to
make the code easier to read. No functional changes.

diff --git a/notmuch-show.c b/notmuch-show.c
index 744b62727c26afed43e3685a160b2b1b52d29865..10247231fbfa77cfaac6223d4321b5f7a6fa17bd 100644 (file)
--- a/notmuch-show.c
+++ b/notmuch-show.c
@@ -1042,6 +1042,7 @@ notmuch_show_command (notmuch_config_t *config, int argc, char *argv[])
     int format_sel = NOTMUCH_FORMAT_NOT_SPECIFIED;
     int exclude = EXCLUDE_TRUE;
     int entire_thread = ENTIRE_THREAD_DEFAULT;
+    notmuch_bool_t single_message;
 
     notmuch_opt_desc_t options[] = {
        { NOTMUCH_OPT_KEYWORD, &format_sel, "format", 'f',
@@ -1080,6 +1081,9 @@ notmuch_show_command (notmuch_config_t *config, int argc, char *argv[])
     if (params.crypto.decrypt)
        params.crypto.verify = TRUE;
 
+    /* specifying a part implies single message display */
+    single_message = params.part >= 0;
+
     if (format_sel == NOTMUCH_FORMAT_NOT_SPECIFIED) {
        /* if part was requested and format was not specified, use format=raw */
        if (params.part >= 0)
@@ -1108,10 +1112,8 @@ notmuch_show_command (notmuch_config_t *config, int argc, char *argv[])
        break;
     case NOTMUCH_FORMAT_RAW:
        format = &format_raw;
-       /* If --format=raw specified without specifying part, we can only
-        * output single message, so set part=0 */
-       if (params.part < 0)
-           params.part = 0;
+       /* raw format only supports single message display */
+       single_message = TRUE;
        params.raw = TRUE;
        break;
     }
@@ -1177,9 +1179,9 @@ notmuch_show_command (notmuch_config_t *config, int argc, char *argv[])
     sprinter = format->new_sprinter(config, stdout);
 
     /* If a single message is requested we do not use search_excludes. */
-    if (params.part >= 0)
+    if (single_message) {
        ret = do_show_single (config, query, format, sprinter, &params);
-    else {
+    } else {
        /* We always apply set the exclude flag. The
         * exclude=true|false option controls whether or not we return
         * threads that only match in an excluded message */