Allow for any number of plugins

Plugins defined in pluginSrc/ dir

buildAndRun.sh

@@ -4,8 +4,17 @@ set -x
 
 # Compile plugins
 
-(cd plugin; docker run --rm -v "$PWD":/usr/src/plugin -w /usr/src/plugin golang:1.8 go build -buildmode=plugin)
-(cd plugin2; docker run --rm -v "$PWD":/usr/src/plugin2 -w /usr/src/plugin2 golang:1.8 go build -buildmode=plugin)
+pluginSrc='pluginSrc'
+pluginDirs=`ls $pluginSrc`
+mkdir -p plugins
+
+for i in ${pluginDirs}
+do
+    fullPath=${pluginSrc}/$i
+    (cd $fullPath; docker run --rm -v "$PWD":/usr/src/$fullPath -w /usr/src/$fullPath golang:1.8 go build -buildmode=plugin)
+done
+
+mv -f `find $pluginSrc -name '*.so'` plugins/
 
 # Compile main app
 
@@ -13,4 +22,4 @@ docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp golang:1.8 go build
 
 # Run it
 
-./myapp plugin/plugin.so plugin2/plugin2.so
+./myapp plugins

main.go

@@ -2,19 +2,46 @@ package main
 
 import (
 	"os"
+	"path"
 	"plugin"
 )
 
-func main() {
-	for _, pName := range os.Args[1:] {
-		p, err := plugin.Open(pName)
+func getPlugins(pluginDir string) ([]func(string), error) {
+	pDir, err := os.Open(pluginDir)
+	if err != nil {
+		return nil, err
+	}
+	pFiles, err := pDir.Readdir(0)
+	if err != nil {
+		return nil, err
+	}
+
+	var ret []func(string)
+	for _, pFile := range pFiles {
+		if pFile.IsDir() {
+			continue
+		}
+		p, err := plugin.Open(path.Join(pluginDir, pFile.Name()))
 		if err != nil {
-			panic(err)
+			return nil, err
 		}
 		sayHello, err := p.Lookup("SayHello")
 		if err != nil {
-			panic(err)
+			return nil, err
 		}
-		sayHello.(func(string))("Gildas")
+		ret = append(ret, sayHello.(func(string)))
+	}
+	return ret, nil
+}
+
+func main() {
+	pluginDir := os.Args[1]
+
+	ps, err := getPlugins(pluginDir)
+	if err != nil {
+		panic(err)
+	}
+	for _, p := range ps {
+		p("Gildas")
 	}
 }