add service inspect command, introduce squirrel for sql query building

cmd/uncloud/service/inspect.go

@@ -0,0 +1,95 @@
+package service
+
+import (
+	"context"
+	"fmt"
+	"github.com/docker/docker/pkg/stringid"
+	"github.com/docker/go-units"
+	"google.golang.org/protobuf/types/known/emptypb"
+	"os"
+	"text/tabwriter"
+	"time"
+
+	"github.com/spf13/cobra"
+	client "uncloud/internal/cli"
+)
+
+type inspectOptions struct {
+	service string
+	cluster string
+}
+
+func NewInspectCommand() *cobra.Command {
+	opts := inspectOptions{}
+	cmd := &cobra.Command{
+		Use:   "inspect",
+		Short: "Display detailed information on a service.",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			uncli := cmd.Context().Value("cli").(*client.CLI)
+			opts.service = args[0]
+			return inspect(cmd.Context(), uncli, &opts)
+		},
+	}
+	cmd.Flags().StringVarP(
+		&opts.cluster, "cluster", "c", "",
+		"Name of the cluster. (default is the current cluster)",
+	)
+	return cmd
+}
+
+func inspect(ctx context.Context, uncli *client.CLI, opts *inspectOptions) error {
+	cli, err := uncli.ConnectCluster(ctx, opts.cluster)
+	if err != nil {
+		return fmt.Errorf("connect to cluster: %w", err)
+	}
+	defer cli.Close()
+
+	svc, err := cli.InspectService(ctx, opts.service)
+	if err != nil {
+		return fmt.Errorf("inspect service: %w", err)
+	}
+
+	resp, err := cli.ListMachines(ctx, &emptypb.Empty{})
+	if err != nil {
+		return fmt.Errorf("list machines: %w", err)
+	}
+	machinesNamesByID := make(map[string]string)
+	for _, m := range resp.Machines {
+		machinesNamesByID[m.Machine.Id] = m.Machine.Name
+	}
+
+	fmt.Printf("ID:    %s\n", svc.ID)
+	fmt.Printf("Name:  %s\n", svc.Name)
+	fmt.Println()
+
+	// Print the list of containers in a table format.
+	tw := tabwriter.NewWriter(os.Stdout, 0, 0, 3, ' ', 0)
+	if _, err = fmt.Fprintln(tw, "CONTAINER ID\tIMAGE\tCREATED\tSTATUS\tMACHINE"); err != nil {
+		return fmt.Errorf("write header: %w", err)
+	}
+
+	for _, ctr := range svc.Containers {
+		createdAt := time.Unix(ctr.Container.Created, 0)
+		created := units.HumanDuration(time.Now().UTC().Sub(createdAt)) + " ago"
+
+		machine := machinesNamesByID[ctr.MachineID]
+		if machine == "" {
+			machine = ctr.MachineID
+		}
+
+		_, err = fmt.Fprintf(
+			tw,
+			"%s\t%s\t%s\t%s\t%s\n",
+			stringid.TruncateID(ctr.Container.ID),
+			ctr.Container.Image,
+			created,
+			ctr.Container.Status,
+			machine,
+		)
+		if err != nil {
+			return fmt.Errorf("write row: %w", err)
+		}
+	}
+	return tw.Flush()
+}