feat: rewrite the storage plugin in golang

Refs #6814

plugins/storage/src/commands/commands.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/dokku/dokku/plugins/common"
+)
+
+const (
+	helpHeader = `Usage: dokku storage[:COMMAND]
+
+Manage mounted volumes
+
+Additional commands:`
+
+	helpContent = `
+    storage:ensure-directory [--chown option] <directory>, Creates a persistent storage directory in the recommended storage path
+    storage:list <app> [--format text|json], List bind mounts for app's container(s) (host:container)
+    storage:mount <app> <host-dir:container-dir>, Create a new bind mount
+    storage:report [<app>] [<flag>], Displays a storage report for one or more apps
+    storage:unmount <app> <host-dir:container-dir>, Remove an existing bind mount`
+)
+
+func main() {
+	flag.Usage = usage
+	flag.Parse()
+
+	cmd := flag.Arg(0)
+	switch cmd {
+	case "storage":
+		usage()
+	case "storage:help":
+		usage()
+	case "help":
+		result, err := common.CallExecCommand(common.ExecCommandInput{
+			Command: "ps",
+			Args:    []string{"-o", "command=", strconv.Itoa(os.Getppid())},
+		})
+		if err == nil && strings.Contains(result.StdoutContents(), "--all") {
+			fmt.Println(helpContent)
+		} else {
+			fmt.Print("\n    storage, Manage mounted volumes\n")
+		}
+	default:
+		dokkuNotImplementExitCode, err := strconv.Atoi(os.Getenv("DOKKU_NOT_IMPLEMENTED_EXIT"))
+		if err != nil {
+			fmt.Println("failed to retrieve DOKKU_NOT_IMPLEMENTED_EXIT environment variable")
+			dokkuNotImplementExitCode = 10
+		}
+		os.Exit(dokkuNotImplementExitCode)
+	}
+}
+
+func usage() {
+	common.CommandUsage(helpHeader, helpContent)
+}

plugins/storage/src/subcommands/subcommands.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/dokku/dokku/plugins/common"
+	"github.com/dokku/dokku/plugins/storage"
+
+	flag "github.com/spf13/pflag"
+)
+
+func main() {
+	parts := strings.Split(os.Args[0], "/")
+	subcommand := parts[len(parts)-1]
+
+	var err error
+	switch subcommand {
+	case "default":
+		err = storage.CommandHelp()
+	case "ensure-directory":
+		args := flag.NewFlagSet("storage:ensure-directory", flag.ExitOnError)
+		chown := args.String("chown", "herokuish", "--chown: chown option (herokuish, heroku, paketo, root, false)")
+		args.Parse(os.Args[2:])
+		directory := args.Arg(0)
+		err = storage.CommandEnsureDirectory(directory, *chown)
+	case "list":
+		args := flag.NewFlagSet("storage:list", flag.ExitOnError)
+		format := args.String("format", "text", "--format: output format (text, json)")
+		args.Parse(os.Args[2:])
+		appName := args.Arg(0)
+		err = storage.CommandList(appName, *format)
+	case "mount":
+		args := flag.NewFlagSet("storage:mount", flag.ExitOnError)
+		args.Parse(os.Args[2:])
+		appName := args.Arg(0)
+		mountPath := args.Arg(1)
+		err = storage.CommandMount(appName, mountPath)
+	case "report":
+		args := flag.NewFlagSet("storage:report", flag.ExitOnError)
+		format := args.String("format", "stdout", "--format: output format (stdout, json)")
+		args.Parse(os.Args[2:])
+
+		osArgs, infoFlag, parseErr := common.ParseReportArgs("storage", args.Args())
+		if parseErr != nil {
+			err = parseErr
+		} else {
+			appName := ""
+			if len(osArgs) > 0 {
+				appName = osArgs[0]
+			}
+			if *format == "stdout" {
+				err = storage.CommandReport(appName, infoFlag)
+			} else {
+				err = storage.CommandReportSingleApp(appName, infoFlag, *format)
+			}
+		}
+	case "unmount":
+		args := flag.NewFlagSet("storage:unmount", flag.ExitOnError)
+		args.Parse(os.Args[2:])
+		appName := args.Arg(0)
+		mountPath := args.Arg(1)
+		err = storage.CommandUnmount(appName, mountPath)
+	default:
+		err = fmt.Errorf("Invalid plugin subcommand call: %s", subcommand)
+	}
+
+	if err != nil {
+		common.LogFailWithError(err)
+	}
+}

plugins/storage/src/triggers/triggers.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/dokku/dokku/plugins/common"
+	"github.com/dokku/dokku/plugins/storage"
+)
+
+func main() {
+	parts := strings.Split(os.Args[0], "/")
+	trigger := parts[len(parts)-1]
+	flag.Parse()
+
+	var err error
+	switch trigger {
+	case "install":
+		err = storage.TriggerInstall()
+	case "storage-list":
+		appName := flag.Arg(0)
+		phase := flag.Arg(1)
+		format := flag.Arg(2)
+		err = storage.TriggerStorageList(appName, phase, format)
+	default:
+		err = fmt.Errorf("Invalid plugin trigger call: %s", trigger)
+	}
+
+	if err != nil {
+		common.LogFailWithError(err)
+	}
+}