From bc99087ff95d0cdada827f3b838d05e0c9448b63 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani@nikula.org>
Date: Sun, 1 Oct 2017 23:53:14 +0300
Subject: [PATCH] cli: add .present field to opt desc to check if the arg was
 present

Add pointer to boolean .present field to opt desc, which (if non-NULL)
will be set to TRUE if the argument in question is present on the
command line. Unchanged otherwise.
---
 command-line-arguments.c | 11 ++++++++---
 command-line-arguments.h |  3 +++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/command-line-arguments.c b/command-line-arguments.c
index f1a5b232..39940d5f 100644
--- a/command-line-arguments.c
+++ b/command-line-arguments.c
@@ -128,6 +128,8 @@ parse_position_arg (const char *arg_str, int pos_arg_index,
 	if (arg_desc->opt_position) {
 	    if (pos_arg_counter == pos_arg_index) {
 		*arg_desc->opt_position = arg_str;
+		if (arg_desc->present)
+		    *arg_desc->present = TRUE;
 		return TRUE;
 	    }
 	    pos_arg_counter++;
@@ -202,10 +204,13 @@ parse_option (int argc, char **argv, const notmuch_opt_desc_t *options, int opt_
 	else
 	    INTERNAL_ERROR ("unknown or unhandled option \"%s\"", try->name);
 
-	if (opt_status)
-	    return opt_index+1;
-	else
+	if (! opt_status)
 	    return -1;
+
+	if (try->present)
+	    *try->present = TRUE;
+
+	return opt_index+1;
     }
     return -1;
 }
diff --git a/command-line-arguments.h b/command-line-arguments.h
index ff51abce..dfc808bd 100644
--- a/command-line-arguments.h
+++ b/command-line-arguments.h
@@ -27,6 +27,9 @@ typedef struct notmuch_opt_desc {
     /* Must be set except for opt_inherit and opt_position. */
     const char *name;
 
+    /* Optional, if non-NULL, set to TRUE if the option is present. */
+    notmuch_bool_t *present;
+
     /* Must be set for opt_keyword and opt_flags. */
     const struct notmuch_keyword *keywords;
 } notmuch_opt_desc_t;