The plugin package is compiled using the normal Go toolchain. The only requirement is to use the buildmode=plugin compilation flag as shown below:
go build -buildmode=plugin -o download/download.so download/download.go
go build -buildmode=plugin -o helloworld/greeter.so helloworld/greeter.go
The demo in this repository implements a simple greeting and download files system. Each plugin package (directories ./download and ./helloworld) implements code that prints a greeting meesage and donwload files url. File ./helloPlugin.go uses the new Go plugin package to load the pluggable modules and run the proper method using passed command-line parameters.
For instance, when the program is executed it prints a greeting message using the passed parameter to select the plugin to load for the appropriate language.
> go run helloPlugin.go hellow
Hi there welcome to Golang
Or to download a file url
> go run helloPlugin.go download url
Start download
Download at____%s /Users/nhatle/go/src/go-plugin-example/resourcesimage2018-10-01 11:15:59.637373 +0700 +07 m=+0.060956138.jpg
---->>>Done Download url:http://images.fanpop.com/images/image_uploads/New-York-new-york-186897_1024_768.jpg
As you can see, the capability of the driver program is dynamically expanded by the plugins allowing it to display a greeting message or download a file without the need to recompile the program.