db: index file location is a URL

TODO

@@ -6,8 +6,6 @@
 - Compress 'installed' and 'scripts'
 - Repository support:
 	- always keep local copy of index
-	- index/package fetching from URLs
-	- read from config file
 	- cache .apks on USB stick when using network repo for reboot
 
 - Error handling and rollback

src/apk_io.h

@@ -50,6 +50,7 @@ struct apk_istream *apk_istream_from_fd(int fd);
 struct apk_istream *apk_istream_from_file(const char *file);
 struct apk_istream *apk_istream_from_file_gz(const char *file);
 struct apk_istream *apk_istream_from_url(const char *url);
+struct apk_istream *apk_istream_from_url_gz(const char *url);
 size_t apk_istream_skip(struct apk_istream *istream, size_t size);
 size_t apk_istream_splice(void *stream, int fd, size_t size,
 			  apk_progress_cb cb, void *cb_ctx);

src/database.c

@@ -813,7 +813,7 @@ int apk_db_add_repository(apk_database_t _db, apk_blob_t repository)
 	};
 
 	snprintf(tmp, sizeof(tmp), "%s/APK_INDEX.gz", db->repos[r].url);
-	is = apk_istream_from_file_gz(tmp);
+	is = apk_istream_from_url_gz(tmp);
 	if (is == NULL) {
 		apk_error("Failed to open index file %s", tmp);
 		return -1;

src/url.c

@@ -66,6 +66,11 @@ struct apk_istream *apk_istream_from_url(const char *url)
 	return apk_istream_from_fd(fork_wget(url));
 }
 
+struct apk_istream *apk_istream_from_url_gz(const char *file)
+{
+	return apk_bstream_gunzip(apk_bstream_from_url(file), TRUE);
+}
+
 struct apk_bstream *apk_bstream_from_url(const char *url)
 {
 	if (url_is_file(url))
@@ -73,3 +78,4 @@ struct apk_bstream *apk_bstream_from_url(const char *url)
 
 	return apk_bstream_from_fd(fork_wget(url));
 }
+