/
application_plugin.go
53 lines (47 loc) · 1.64 KB
/
application_plugin.go
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// Copyright (c) 2022-2023 The Go-Curses Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use file except in compliance with the License.
// You may obtain a copy of the license at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cdk
import (
"fmt"
"plugin"
)
// LoadApplicationFromPlugin is a wrapper around
// LoadApplicationFromPluginWithExport, using a default exported symbol name of
// `CdkApp`.
func LoadApplicationFromPlugin(path string) (app Application, err error) {
return LoadApplicationFromPluginWithExport("CdkApp", path)
}
// LoadApplicationFromPluginWithExport opens the shared object file indicated by
// the path argument, looks for the exported symbol (which needs to be to a
// valid cdk.Application instance), recasts and returns the result.
func LoadApplicationFromPluginWithExport(exported, path string) (app Application, err error) {
var plug *plugin.Plugin
if plug, err = plugin.Open(path); err != nil {
return nil, err
}
var appSymbol plugin.Symbol
if appSymbol, err = plug.Lookup(exported); err != nil {
return nil, err
}
if appPointer, ok := appSymbol.(*Application); !ok {
return nil, fmt.Errorf(
"CdkApp value stored in plugin is not of cdk.Application type: %v (%T)\n",
appSymbol,
appSymbol,
)
} else {
app = *appPointer
}
return
}