main: provide the way to hide version number from interactive output

Author: masatake

Tmain/sandbox-version.d/exit-expected.txt

@@ -0,0 +1 @@
+0

Tmain/sandbox-version.d/run.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+# Copyright: 2022 Masatake YAMATO
+# License: GPL-2
+
+CTAGS=$1
+
+. ../utils.sh
+is_feature_available $CTAGS sandbox
+is_feature_available ${CTAGS} interactive
+is_feature_available ${CTAGS} '!' gcov
+
+echo | $CTAGS --quiet --options=NONE  --_interactive=sandbox \
+			  --pseudo-tags=+TAG_PROGRAM_NAME \
+			  --pseudo-tags=+TAG_PROGRAM_VERSION &&
+echo | $CTAGS --quiet --options=NONE  --_interactive=sandbox \
+			  --pseudo-tags=-TAG_PROGRAM_NAME \
+			  --pseudo-tags=+TAG_PROGRAM_VERSION &&
+echo | $CTAGS --quiet --options=NONE  --_interactive=sandbox \
+			  --pseudo-tags=+TAG_PROGRAM_NAME \
+			  --pseudo-tags=-TAG_PROGRAM_VERSION
+exit $?

Tmain/sandbox-version.d/stderr-expected.txt

@@ -0,0 +1,3 @@
+{"_type": "program", "name": "Universal Ctags", "version": "5.9.0"}
+{"_type": "program", "version": "5.9.0"}
+{"_type": "program", "name": "Universal Ctags"}

Tmain/sandbox-version.d/stdout-expected.txt

@@ -59,6 +59,7 @@
 #include "options_p.h"
 #include "optscript.h"
 #include "parse_p.h"
+#include "ptag_p.h"
 #include "read_p.h"
 #include "routines_p.h"
 #include "stats_p.h"
@@ -415,7 +416,16 @@ void interactiveLoop (cookedArgs *args CTAGS_ATTR_UNUSED, void *user)
 	char buffer[1024];
 	json_t *request;
 
-	fputs ("{\"_type\": \"program\", \"name\": \"" PROGRAM_NAME "\", \"version\": \"" PROGRAM_VERSION "\"}\n", stdout);
+	if (isPtagEnabled(PTAG_PROGRAM_NAME))
+	{
+		if (isPtagEnabled(PTAG_PROGRAM_VERSION))
+			fputs ("{\"_type\": \"program\", \"name\": \"" PROGRAM_NAME "\", \"version\": \"" PROGRAM_VERSION "\"}\n", stdout);
+		else
+			fputs ("{\"_type\": \"program\", \"name\": \"" PROGRAM_NAME "\"}\n", stdout);
+	}
+	else if (isPtagEnabled(PTAG_PROGRAM_VERSION))
+		fputs ("{\"_type\": \"program\", \"version\": \"" PROGRAM_VERSION "\"}\n", stdout);
+
 	fflush (stdout);
 
 	while (fgets (buffer, sizeof(buffer), stdin))