|
| 1 | +package cmd |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "fmt" |
| 6 | + "os" |
| 7 | + "strings" |
| 8 | + |
| 9 | + "github.com/kernel/hypeman-go" |
| 10 | + "github.com/kernel/hypeman-go/option" |
| 11 | + "github.com/tidwall/gjson" |
| 12 | + "github.com/urfave/cli/v3" |
| 13 | +) |
| 14 | + |
| 15 | +var forkCmd = cli.Command{ |
| 16 | + Name: "fork", |
| 17 | + Usage: "Fork an instance into a new instance", |
| 18 | + ArgsUsage: "<source> <name>", |
| 19 | + Flags: []cli.Flag{ |
| 20 | + &cli.BoolFlag{ |
| 21 | + Name: "from-running", |
| 22 | + Usage: "Allow forking from a running source by doing standby -> fork -> restore", |
| 23 | + }, |
| 24 | + &cli.StringFlag{ |
| 25 | + Name: "target-state", |
| 26 | + Usage: "Target state for the forked instance: Stopped, Standby, or Running", |
| 27 | + }, |
| 28 | + }, |
| 29 | + Action: handleFork, |
| 30 | + HideHelpCommand: true, |
| 31 | +} |
| 32 | + |
| 33 | +func handleFork(ctx context.Context, cmd *cli.Command) error { |
| 34 | + args := cmd.Args().Slice() |
| 35 | + if len(args) < 2 { |
| 36 | + return fmt.Errorf("source instance and target name required\nUsage: hypeman fork [flags] <source> <name>") |
| 37 | + } |
| 38 | + |
| 39 | + source := args[0] |
| 40 | + targetName := args[1] |
| 41 | + |
| 42 | + targetState, err := normalizeForkTargetState(cmd.String("target-state")) |
| 43 | + if err != nil { |
| 44 | + return err |
| 45 | + } |
| 46 | + |
| 47 | + client := hypeman.NewClient(getDefaultRequestOptions(cmd)...) |
| 48 | + |
| 49 | + sourceID, err := ResolveInstance(ctx, &client, source) |
| 50 | + if err != nil { |
| 51 | + return err |
| 52 | + } |
| 53 | + |
| 54 | + var opts []option.RequestOption |
| 55 | + if cmd.Root().Bool("debug") { |
| 56 | + opts = append(opts, debugMiddlewareOption) |
| 57 | + } |
| 58 | + |
| 59 | + params := instanceForkParams{ |
| 60 | + Name: targetName, |
| 61 | + } |
| 62 | + if cmd.IsSet("from-running") { |
| 63 | + fromRunning := cmd.Bool("from-running") |
| 64 | + params.FromRunning = &fromRunning |
| 65 | + } |
| 66 | + if targetState != "" { |
| 67 | + params.TargetState = &targetState |
| 68 | + } |
| 69 | + |
| 70 | + fmt.Fprintf(os.Stderr, "Forking %s to %s...\n", source, targetName) |
| 71 | + |
| 72 | + format := cmd.Root().String("format") |
| 73 | + transform := cmd.Root().String("transform") |
| 74 | + |
| 75 | + var raw []byte |
| 76 | + if format != "auto" { |
| 77 | + opts = append(opts, option.WithResponseBodyInto(&raw)) |
| 78 | + } |
| 79 | + |
| 80 | + var forked hypeman.Instance |
| 81 | + if err := client.Post(ctx, fmt.Sprintf("instances/%s/fork", sourceID), params, &forked, opts...); err != nil { |
| 82 | + return err |
| 83 | + } |
| 84 | + |
| 85 | + if format != "auto" { |
| 86 | + obj := gjson.ParseBytes(raw) |
| 87 | + return ShowJSON(os.Stdout, "instance fork", obj, format, transform) |
| 88 | + } |
| 89 | + |
| 90 | + // Output instance ID (useful for scripting) |
| 91 | + fmt.Println(forked.ID) |
| 92 | + fmt.Fprintf(os.Stderr, "Forked %s as %s (state: %s)\n", source, forked.Name, forked.State) |
| 93 | + return nil |
| 94 | +} |
| 95 | + |
| 96 | +func normalizeForkTargetState(state string) (string, error) { |
| 97 | + switch strings.ToLower(state) { |
| 98 | + case "": |
| 99 | + return "", nil |
| 100 | + case "stopped": |
| 101 | + return "Stopped", nil |
| 102 | + case "standby": |
| 103 | + return "Standby", nil |
| 104 | + case "running": |
| 105 | + return "Running", nil |
| 106 | + default: |
| 107 | + return "", fmt.Errorf("invalid target state: %s (must be Stopped, Standby, or Running)", state) |
| 108 | + } |
| 109 | +} |
| 110 | + |
| 111 | +type instanceForkParams struct { |
| 112 | + Name string `json:"name"` |
| 113 | + FromRunning *bool `json:"from_running,omitempty"` |
| 114 | + TargetState *string `json:"target_state,omitempty"` |
| 115 | +} |
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