Initial commit

Author: Aleksandr Andryashin

.gitignore

@@ -1,3 +1,5 @@
+plug
+
 # Compiled Object files, Static and Dynamic libs (Shared Objects)
 *.o
 *.a

Dockerfile

@@ -0,0 +1,9 @@
+FROM debian:jessie-slim
+
+RUN mkdir /plugins
+
+ADD plug /plugins
+ADD plugins/one/one.so /plugins
+ADD plugins/two/two.so /plugins
+
+CMD ["/plugins/plug", "/plugins/one.so", "/plugins/two.so"]

Makefile

@@ -0,0 +1,12 @@
+all:
+	docker run -v$(HOME):/root --rm golang:1.8 /bin/bash -c 'cd /root/go/src/github.com/aandryashin/plug/plugins/one && GOPATH=/root/go go build -buildmode plugin -o one.so'
+	docker run -v$(HOME):/root --rm golang:1.8 /bin/bash -c 'cd /root/go/src/github.com/aandryashin/plug/plugins/two && GOPATH=/root/go go build -buildmode plugin -o two.so'
+	docker run -v$(HOME):/root --rm golang:1.8 /bin/bash -c 'cd /root/go/src/github.com/aandryashin/plug && GOPATH=/root/go go build'
+	docker build -t plug:0.1.0 .
+
+clean:
+	rm plug
+	rm plugins/one/one.so
+	rm plugins/two/two.so
+	docker rmi -f plug:0.1.0
+	

main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"fmt"
+	"github.com/aandryashin/plug/so"
+	"os"
+	"plugin"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Printf("Usage:\n\t%s file1.so file2.so...\n", os.Args[0])
+	}
+	for _, f := range os.Args[1:] {
+		p, err := plugin.Open(f)
+		if err != nil {
+			fmt.Printf("%s: load %s: %v\n", os.Args[0], f, err)
+			os.Exit(1)
+		}
+
+		f, err := p.Lookup("New")
+		if err != nil {
+			fmt.Printf("%s: lookup interface: %v\n", os.Args[0], err)
+			os.Exit(1)
+		}
+
+		fn, ok := f.(func() so.SO)
+		if !ok {
+			fmt.Printf("%s: verify signature: %v\n", os.Args[0], err)
+			os.Exit(1)
+		}
+
+		fn().Run()
+	}
+}

plugins/one/plugin.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"github.com/aandryashin/plug/so"
+)
+
+type Plugin struct {
+	name  string
+	value string
+}
+
+func (p *Plugin) Run() {
+	fmt.Printf("I am %s plugin [%s]\n", p.name, p.value)
+}
+
+func New() so.SO {
+	return &Plugin{"String", "Hello, world!"}
+}

plugins/two/plugin.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"github.com/aandryashin/plug/so"
+)
+
+type Plugin struct {
+	name  string
+	value int
+}
+
+func (p *Plugin) Run() {
+	fmt.Printf("I am %s plugin [%d]\n", p.name, p.value)
+}
+
+func New() so.SO {
+	return &Plugin{"Integer", 17}
+}

so/so.go

@@ -0,0 +1,5 @@
+package so
+
+type SO interface {
+	Run()
+}