MM-10702 Moving plugins to use hashicorp go-plugin. (#8978)

* Moving plugins to use hashicorp go-plugin.

* Tweaks from feedback.

1 files changed, 31 insertions, 0 deletions

diff --git a/vendor/github.com/hashicorp/go-plugin/server_mux.go b/vendor/github.com/hashicorp/go-plugin/server_mux.go
new file mode 100644
index 000000000..033079ea0
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-plugin/server_mux.go
@@ -0,0 +1,31 @@
+package plugin
+
+import (
+	"fmt"
+	"os"
+)
+
+// ServeMuxMap is the type that is used to configure ServeMux
+type ServeMuxMap map[string]*ServeConfig
+
+// ServeMux is like Serve, but serves multiple types of plugins determined
+// by the argument given on the command-line.
+//
+// This command doesn't return until the plugin is done being executed. Any
+// errors are logged or output to stderr.
+func ServeMux(m ServeMuxMap) {
+	if len(os.Args) != 2 {
+		fmt.Fprintf(os.Stderr,
+			"Invoked improperly. This is an internal command that shouldn't\n"+
+				"be manually invoked.\n")
+		os.Exit(1)
+	}
+
+	opts, ok := m[os.Args[1]]
+	if !ok {
+		fmt.Fprintf(os.Stderr, "Unknown plugin: %s\n", os.Args[1])
+		os.Exit(1)
+	}
+
+	Serve(opts)
+}