libyang issue #2390

ly_ctx_set_module_imp_clb.c

#include <stdlib.h>
#include <stdio.h>
#include <err.h>

#include <libyang/libyang.h>

#define YANG_SEARCH_PATH "/usr/local/share/yang/"

const LY_ERR module_callback(const char *mod_name, const char *mod_rev,
			     const char *submod_name, const char *submod_rev,
			     void *user_data, LYS_INFORMAT *format,
			     const char **module_data,
			     ly_module_imp_data_free_clb *free_module_data)
{
	printf("Callback invoked for module: %s\n", mod_name);
	return LY_ENOTFOUND;
}

int main(int argc, char **argv)
{
	struct ly_ctx *ly_ctx;

	/* initialization */
	if (ly_ctx_new(YANG_SEARCH_PATH,
		       LY_CTX_NO_YANGLIBRARY | LY_CTX_PREFER_SEARCHDIRS,
		       &ly_ctx)
	    != LY_SUCCESS)
		errx(1, "ly_ctx_new(): %s", ly_errmsg(ly_ctx));

	// set the import callback
	ly_ctx_set_module_imp_clb(ly_ctx, module_callback, NULL);


	// load module
	const char *module = "holo-isis";
	printf("Loading %s...\n", module);
	if (ly_ctx_load_module(ly_ctx, module, NULL, NULL) == NULL)
		errx(1, "ly_ctx_load_module(%s): %s", module,
		     ly_errmsg(ly_ctx));

	/* cleanup */
	ly_ctx_destroy(ly_ctx);

	return 0;
}