From: Michael Tremer <michael.tremer@ipfire.org>
Date: Thu, 29 Apr 2021 21:10:25 +0000 (+0000)
Subject: pakfire: Add a custom namespace for features
X-Git-Tag: 0.9.28~1285^2~189
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f2025988119e863a702a6297d00de88fa8f438cf;p=pakfire.git

pakfire: Add a custom namespace for features

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/libpakfire/pakfire.c b/src/libpakfire/pakfire.c
index 5427f787a..2a394fb1b 100644
--- a/src/libpakfire/pakfire.c
+++ b/src/libpakfire/pakfire.c
@@ -95,6 +95,16 @@ struct _Pakfire {
 	} distro;
 };
 
+/*
+	This is a list of all features that are supported by this version of Pakfire
+*/
+static const struct pakfire_feature {
+	const char* name;
+} features[] = {
+	{ "Compress-Zstandard" },
+	{ NULL },
+};
+
 static const struct pakfire_mountpoint {
 	const char* source;
 	const char* target;
@@ -328,6 +338,28 @@ static void pool_log(Pool* pool, void* data, int type, const char* s) {
 	DEBUG(pakfire, "pool: %s", s);
 }
 
+static Id pakfire_namespace_callback(Pool* pool, void* data, Id ns, Id id) {
+	Pakfire pakfire = (Pakfire)data;
+
+	const char* namespace = pool_id2str(pool, ns);
+	const char* name = pool_dep2str(pool, id);
+
+	DEBUG(pakfire, "Namespace callback called for %s(%s)\n", namespace, name);
+
+	// We only handle the pakfire namesapce
+	if (strcmp(namespace, "pakfire") != 0)
+		return 0;
+
+	// Find all supported features
+	for (const struct pakfire_feature* feature = features; feature->name; feature++) {
+		if (strcmp(feature->name, name) == 0)
+			return 1;
+	}
+
+	// Not supported
+	return 0;
+}
+
 static int pakfire_populate_pool(Pakfire pakfire) {
 	struct pakfire_db* db;
 	PakfireRepo repo = NULL;
@@ -352,6 +384,9 @@ static int pakfire_populate_pool(Pakfire pakfire) {
 	// Set debug callback
 	pool_setdebugcallback(pool, pool_log, pakfire);
 
+	// Install namespace callback
+	pool_setnamespacecallback(pool, pakfire_namespace_callback, pakfire);
+
 	// Open database in read-only mode and try to load all installed packages
 	r = pakfire_db_open(&db, pakfire, PAKFIRE_DB_READWRITE);
 	if (r)