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namespace Dino.Plugins {
private extern const string SYSTEM_LIBDIR_NAME;
private extern const string SYSTEM_PLUGIN_DIR;
private class Info : Object {
public Module module;
public Type gtype;
public Info(Type type, owned Module module) {
this.module = (owned) module;
this.gtype = type;
}
}
public class Loader : Object {
[CCode (has_target = false)]
private delegate Type RegisterPluginFunction (Module module);
private string[] search_paths = new string[0];
private RootInterface[] plugins = new RootInterface[0];
private Info[] infos = new Info[0];
public Loader(string? exec_str = null) {
if (Environment.get_variable("DINO_PLUGIN_DIR") != null) {
search_paths += Environment.get_variable("DINO_PLUGIN_DIR");
}
search_paths += Path.build_filename(Environment.get_home_dir(), ".local", "lib", "dino", "plugins");
string? exec_path = exec_str;
if (exec_path != null) {
if (!exec_path.contains(Path.DIR_SEPARATOR_S)) {
exec_path = Environment.find_program_in_path(exec_str);
}
if (Path.get_dirname(exec_path).contains("dino") || Path.get_dirname(exec_path) == "." || Path.get_dirname(exec_path).contains("build")) {
search_paths += Path.build_filename(Path.get_dirname(exec_path), "plugins");
}
if (Path.get_basename(Path.get_dirname(exec_path)) == "bin") {
search_paths += Path.build_filename(Path.get_dirname(Path.get_dirname(exec_path)), SYSTEM_LIBDIR_NAME, "dino", "plugins");
}
}
search_paths += SYSTEM_PLUGIN_DIR;
}
public void print_search_paths() {
foreach (string prefix in search_paths) {
print(@"$prefix\n");
}
}
public RootInterface load(string name, Dino.Application app) throws Error {
if (Module.supported () == false) {
throw new Error (-1, 0, "Plugins are not supported");
}
Module module = null;
string path = "";
foreach (string prefix in search_paths) {
path = Path.build_filename(prefix, name);
module = Module.open (path, ModuleFlags.BIND_LAZY);
if (module != null) break;
}
if (module == null) {
throw new Error (-1, 1, "%s", Module.error ().replace(path, name));
}
void* function;
module.symbol ("register_plugin", out function);
if (function == null) {
throw new Error (-1, 2, "register_plugin () not found");
}
RegisterPluginFunction register_plugin = (RegisterPluginFunction) function;
Type type = register_plugin (module);
if (type.is_a (typeof (RootInterface)) == false) {
throw new Error (-1, 3, "Unexpected type");
}
Info info = new Plugins.Info (type, (owned) module);
infos += info;
RootInterface plugin = (RootInterface) Object.new (type);
plugins += plugin;
plugin.registered (app);
return plugin;
}
public void shutdown() {
foreach (RootInterface p in plugins) {
p.shutdown();
}
}
}
}
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