fail on error (#20)

ci-via-github-actions

vendor/github.com/docker/docker/client/ping.go

@@ -0,0 +1,35 @@
+package client // import "github.com/docker/docker/client"
+
+import (
+	"context"
+	"path"
+
+	"github.com/docker/docker/api/types"
+)
+
+// Ping pings the server and returns the value of the "Docker-Experimental", "Builder-Version", "OS-Type" & "API-Version" headers
+func (cli *Client) Ping(ctx context.Context) (types.Ping, error) {
+	var ping types.Ping
+	req, err := cli.buildRequest("GET", path.Join(cli.basePath, "/_ping"), nil, nil)
+	if err != nil {
+		return ping, err
+	}
+	serverResp, err := cli.doRequest(ctx, req)
+	if err != nil {
+		return ping, err
+	}
+	defer ensureReaderClosed(serverResp)
+
+	if serverResp.header != nil {
+		ping.APIVersion = serverResp.header.Get("API-Version")
+
+		if serverResp.header.Get("Docker-Experimental") == "true" {
+			ping.Experimental = true
+		}
+		ping.OSType = serverResp.header.Get("OSType")
+		if bv := serverResp.header.Get("Builder-Version"); bv != "" {
+			ping.BuilderVersion = types.BuilderVersion(bv)
+		}
+	}
+	return ping, cli.checkResponseErr(serverResp)
+}