public JSValue ResolveModule(ScriptContext context, string parent_module_id, string module_id)
{
for (int i = 0, count = _moduleResolvers.Count; i < count; i++)
{
var resolver = _moduleResolvers[i];
string resolved_id;
if (resolver.ResolveModule(_fileSystem, _pathResolver, parent_module_id, module_id, out resolved_id))
{
// 如果目标模块在 reloading 列表中, 直接进入重载逻辑
JSValue module_obj;
if (context.TryGetModuleForReloading(resolved_id, out module_obj))
{
JSValue exports_obj;
RaiseScriptReloadingEvent_nothrow(context, resolved_id);
if (resolver.ReloadModule(context, resolved_id, module_obj, out exports_obj))
{
RaiseScriptReloadedEvent_nothrow(context, resolved_id);
JSApi.JS_FreeValue(context, module_obj);
return(exports_obj);
}
JSApi.JS_FreeValue(context, module_obj);
}
// 如果已经在模块缓存中, 直接返回
if (context.LoadModuleCache(resolved_id, out module_obj))
{
var ctx = (JSContext)context;
var exports_obj = JSApi.JS_GetProperty(ctx, module_obj, context.GetAtom("exports"));
JSApi.JS_FreeValue(ctx, module_obj);
return(exports_obj);
}
// 载入新模块
return(resolver.LoadModule(context, parent_module_id, resolved_id));
}
}
return(JSApi.JS_ThrowInternalError(context, $"module can not be resolved ({module_id})"));
}
public JSValue ResolveModule(ScriptContext context, string parent_module_id, string module_id)
{
for (int i = 0, count = _moduleResolvers.Count; i < count; i++)
{
var resolver = _moduleResolvers[i];
string resolved_id;
if (resolver.ResolveModule(_fileSystem, _pathResolver, parent_module_id, module_id, out resolved_id))
{
JSValue mod;
if (context.LoadModuleCache(resolved_id, out mod))
{
var ctx = (JSContext)context;
var exports = JSApi.JS_GetProperty(ctx, mod, context.GetAtom("exports"));
JSApi.JS_FreeValue(ctx, mod);
return(exports);
}
return(resolver.LoadModule(context, resolved_id));
}
}
return(JSApi.JS_ThrowInternalError(context, $"module can not be resolved ({module_id})"));
}
public void SetProperty(string key, JSValue value)
{
JSApi.JS_SetProperty(_context, _jsValue, _context.GetAtom(key), value);
}
public override unsafe JSValue LoadModule(ScriptContext context, string resolved_id)
{
var fileSystem = context.GetRuntime().GetFileSystem();
var resolved_id_bytes = Utils.TextUtils.GetNullTerminatedBytes(resolved_id);
var dirname = PathUtils.GetDirectoryName(resolved_id);
var source = fileSystem.ReadAllBytes(resolved_id);
var ctx = (JSContext)context;
if (source == null)
{
return(JSApi.JS_ThrowInternalError(ctx, "require module load failed"));
}
var tagValue = ScriptRuntime.TryReadByteCodeTagValue(source);
if (tagValue == ScriptRuntime.BYTECODE_ES6_MODULE_TAG)
{
return(JSApi.JS_ThrowInternalError(ctx, "es6 module can not be loaded by require"));
}
var module_id_atom = context.GetAtom(resolved_id);
var dirname_atom = context.GetAtom(dirname);
var exports_obj = JSApi.JS_NewObject(ctx);
var require_obj = JSApi.JSB_NewCFunction(ctx, ScriptRuntime.module_require, context.GetAtom("require"), 1, JSCFunctionEnum.JS_CFUNC_generic, 0);
var module_obj = context._new_commonjs_module(resolved_id, exports_obj, false);
var main_mod_obj = context._dup_commonjs_main_module();
var filename_obj = JSApi.JS_AtomToString(ctx, module_id_atom);
var dirname_obj = JSApi.JS_AtomToString(ctx, dirname_atom);
JSApi.JS_SetProperty(ctx, require_obj, context.GetAtom("moduleId"), JSApi.JS_DupValue(ctx, filename_obj));
JSApi.JS_SetProperty(ctx, require_obj, context.GetAtom("main"), main_mod_obj);
var require_argv = new JSValue[5] {
exports_obj, require_obj, module_obj, filename_obj, dirname_obj,
};
if (tagValue == ScriptRuntime.BYTECODE_COMMONJS_MODULE_TAG)
{
// bytecode
fixed(byte *intput_ptr = source)
{
var bytecodeFunc = JSApi.JS_ReadObject(ctx, intput_ptr + sizeof(uint), source.Length - sizeof(uint), JSApi.JS_READ_OBJ_BYTECODE);
if (bytecodeFunc.tag == JSApi.JS_TAG_FUNCTION_BYTECODE)
{
var func_val = JSApi.JS_EvalFunction(ctx, bytecodeFunc); // it's CallFree (bytecodeFunc)
if (JSApi.JS_IsFunction(ctx, func_val) != 1)
{
JSApi.JS_FreeValue(ctx, func_val);
JSApi.JS_FreeValue(ctx, require_argv);
return(JSApi.JS_ThrowInternalError(ctx, "failed to require bytecode module"));
}
var rval = JSApi.JS_Call(ctx, func_val, JSApi.JS_UNDEFINED, require_argv.Length, require_argv);
JSApi.JS_FreeValue(ctx, func_val);
if (rval.IsException())
{
JSApi.JS_FreeValue(ctx, require_argv);
return(rval);
}
// success
JSApi.JS_FreeValue(ctx, rval);
}
else
{
JSApi.JS_FreeValue(ctx, bytecodeFunc);
JSApi.JS_FreeValue(ctx, require_argv);
return(JSApi.JS_ThrowInternalError(ctx, "failed to require bytecode module"));
}
}
}
else
{
// source
var input_bytes = TextUtils.GetShebangNullTerminatedCommonJSBytes(source);
fixed(byte *input_ptr = input_bytes)
fixed(byte *resolved_id_ptr = resolved_id_bytes)
{
var input_len = (size_t)(input_bytes.Length - 1);
var func_val = JSApi.JS_Eval(ctx, input_ptr, input_len, resolved_id_ptr, JSEvalFlags.JS_EVAL_TYPE_GLOBAL | JSEvalFlags.JS_EVAL_FLAG_STRICT);
if (func_val.IsException())
{
JSApi.JS_FreeValue(ctx, require_argv);
return(func_val);
}
if (JSApi.JS_IsFunction(ctx, func_val) == 1)
{
var rval = JSApi.JS_Call(ctx, func_val, JSApi.JS_UNDEFINED, require_argv.Length, require_argv);
if (rval.IsException())
{
JSApi.JS_FreeValue(ctx, func_val);
JSApi.JS_FreeValue(ctx, require_argv);
return(rval);
}
JSApi.JS_FreeValue(ctx, rval);
}
JSApi.JS_FreeValue(ctx, func_val);
}
}
JSApi.JS_SetProperty(ctx, module_obj, context.GetAtom("loaded"), JSApi.JS_NewBool(ctx, true));
var exports_ = JSApi.JS_GetProperty(ctx, module_obj, context.GetAtom("exports"));
JSApi.JS_FreeValue(ctx, require_argv);
return(exports_);
}