1 files changed, 107 insertions, 0 deletions

diff --git a/vendor/github.com/hashicorp/go-plugin/grpc_client.go b/vendor/github.com/hashicorp/go-plugin/grpc_client.go
new file mode 100644
index 0000000..44294d0
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-plugin/grpc_client.go
@@ -0,0 +1,107 @@
+package plugin
+
+import (
+        "crypto/tls"
+        "fmt"
+        "net"
+        "time"
+
+        "golang.org/x/net/context"
+        "google.golang.org/grpc"
+        "google.golang.org/grpc/credentials"
+        "google.golang.org/grpc/health/grpc_health_v1"
+)
+
+func dialGRPCConn(tls *tls.Config, dialer func(string, time.Duration) (net.Conn, error)) (*grpc.ClientConn, error) {
+        // Build dialing options.
+        opts := make([]grpc.DialOption, 0, 5)
+
+        // We use a custom dialer so that we can connect over unix domain sockets
+        opts = append(opts, grpc.WithDialer(dialer))
+
+        // go-plugin expects to block the connection
+        opts = append(opts, grpc.WithBlock())
+
+        // Fail right away
+        opts = append(opts, grpc.FailOnNonTempDialError(true))
+
+        // If we have no TLS configuration set, we need to explicitly tell grpc
+        // that we're connecting with an insecure connection.
+        if tls == nil {
+                opts = append(opts, grpc.WithInsecure())
+        } else {
+                opts = append(opts, grpc.WithTransportCredentials(
+                        credentials.NewTLS(tls)))
+        }
+
+        // Connect. Note the first parameter is unused because we use a custom
+        // dialer that has the state to see the address.
+        conn, err := grpc.Dial("unused", opts...)
+        if err != nil {
+                return nil, err
+        }
+
+        return conn, nil
+}
+
+// newGRPCClient creates a new GRPCClient. The Client argument is expected
+// to be successfully started already with a lock held.
+func newGRPCClient(doneCtx context.Context, c *Client) (*GRPCClient, error) {
+        conn, err := dialGRPCConn(c.config.TLSConfig, c.dialer)
+        if err != nil {
+                return nil, err
+        }
+
+        // Start the broker.
+        brokerGRPCClient := newGRPCBrokerClient(conn)
+        broker := newGRPCBroker(brokerGRPCClient, c.config.TLSConfig)
+        go broker.Run()
+        go brokerGRPCClient.StartStream()
+
+        return &GRPCClient{
+                Conn:    conn,
+                Plugins: c.config.Plugins,
+                doneCtx: doneCtx,
+                broker:  broker,
+        }, nil
+}
+
+// GRPCClient connects to a GRPCServer over gRPC to dispense plugin types.
+type GRPCClient struct {
+        Conn    *grpc.ClientConn
+        Plugins map[string]Plugin
+
+        doneCtx context.Context
+        broker  *GRPCBroker
+}
+
+// ClientProtocol impl.
+func (c *GRPCClient) Close() error {
+        c.broker.Close()
+        return c.Conn.Close()
+}
+
+// ClientProtocol impl.
+func (c *GRPCClient) Dispense(name string) (interface{}, error) {
+        raw, ok := c.Plugins[name]
+        if !ok {
+                return nil, fmt.Errorf("unknown plugin type: %s", name)
+        }
+
+        p, ok := raw.(GRPCPlugin)
+        if !ok {
+                return nil, fmt.Errorf("plugin %q doesn't support gRPC", name)
+        }
+
+        return p.GRPCClient(c.doneCtx, c.broker, c.Conn)
+}
+
+// ClientProtocol impl.
+func (c *GRPCClient) Ping() error {
+        client := grpc_health_v1.NewHealthClient(c.Conn)
+        _, err := client.Check(context.Background(), &grpc_health_v1.HealthCheckRequest{
+                Service: GRPCServiceName,
+        })
+
+        return err
+}