enhanced default cluster selection, add 'cluster switch', overhaul json header setting (#47)

cmd/cluster.go

@@ -18,6 +18,7 @@ package cmd
 
 import (
 	"context"
+	"errors"
 
 	"codeberg.org/scip/esctl/pkg/cfg"
 	"codeberg.org/scip/esctl/pkg/es"
@@ -33,6 +34,7 @@ func Cluster(conf *cfg.Config) *cli.Command {
 
 		Commands: []*cli.Command{
 			ClusterStatus(conf),
+			ClusterSwitch(conf),
 			ClusterList(conf),
 			ClusterSettings(conf),
 		},
@@ -77,3 +79,25 @@ func ClusterStatus(conf *cfg.Config) *cli.Command {
 		},
 	}
 }
+
+func ClusterSwitch(conf *cfg.Config) *cli.Command {
+	return &cli.Command{
+		Name:      "switch",
+		Usage:     "set current elasticsearch cluster",
+		UsageText: "switch <cluster-name>",
+		Aliases:   []string{"ctx"},
+
+		ShellComplete: func(ctx context.Context, cmd *cli.Command) {
+			complete(cmd, Ccluster)
+		},
+
+		Action: func(ctx context.Context, cmd *cli.Command) error {
+			name := cmd.Args().Get(0)
+			if name == "" {
+				return errors.New("no cluster name specified")
+			}
+
+			return conf.SwitchCluster(name)
+		},
+	}
+}