From e55fb6675d692e3f44fa67b02b12661e476bd028 Mon Sep 17 00:00:00 2001 From: Jeff Carr Date: Sun, 6 Nov 2022 12:59:24 -0600 Subject: start trying to make the tookits plugins totally minimize helloworld demo try to make a button plugin example debug changes final changes before attempting to use a golang plugin actually running gocui as a plugin add gocli-as-plugin example try to convert the go-cui toolkit into a plugin doc updates make a minimal console gui Signed-off-by: Jeff Carr --- cmds/gocli-as-plugin/main.go | 59 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 cmds/gocli-as-plugin/main.go (limited to 'cmds/gocli-as-plugin/main.go') diff --git a/cmds/gocli-as-plugin/main.go b/cmds/gocli-as-plugin/main.go new file mode 100644 index 0000000..a9bd632 --- /dev/null +++ b/cmds/gocli-as-plugin/main.go @@ -0,0 +1,59 @@ +// Copyright 2014 The gocui Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package main + +import ( + "log" + "os" + + "plugin" +// "github.com/awesome-gocui/gocui" +) + +type Greeter interface { + Greet() +} + +var plugGocli *plugin.Plugin +var plugHello *plugin.Plugin + +func main() { + log.Println("attempt plugin") + + go loadPlugin(plugHello, "../../toolkit/hello.so") + loadPlugin(plugGocli, "../../toolkit/gocli.so") +} + +func loadPlugin(plug *plugin.Plugin, name string) { + // load module + // 1. open the so file to load the symbols + plug, err = plugin.Open(name) + if err != nil { + log.Println(err) + os.Exit(1) + } + + // 2. look up a symbol (an exported function or variable) + // in this case, variable Greeter + symGreeter, err := plug.Lookup("Greeter") + if err != nil { + log.Println(err) + os.Exit(1) + } + + log.Println("symGreater", symGreeter) + + // 3. Assert that loaded symbol is of a desired type + // in this case interface type Greeter (defined above) + // var greeter Greeter + greeter, ok := symGreeter.(Greeter) + if !ok { + log.Println("unexpected type from module symbol") + os.Exit(1) + } + + // 4. use the module + greeter.Greet() +} -- cgit v1.2.3