Add subcommand init for checks and installs helmfile deps (#389)

* Add subcommand init for checks and installs helmfile deps

Signed-off-by: xiaomudk <xiaomudk@gmail.com>

cmd/init.go

@@ -0,0 +1,35 @@
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+
+	"github.com/helmfile/helmfile/pkg/app"
+	"github.com/helmfile/helmfile/pkg/config"
+)
+
+// NewInitCmd helmfile checks and installs deps
+func NewInitCmd(globalCfg *config.GlobalImpl) *cobra.Command {
+	options := config.NewInitOptions()
+	cmd := &cobra.Command{
+		Use:   "init",
+		Short: "Initialize the helmfile, includes version checking and installation of helm and plug-ins",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			initImpl := config.NewInitImpl(globalCfg, options)
+			err := config.NewCLIConfigImpl(initImpl.GlobalImpl)
+			if err != nil {
+				return err
+			}
+
+			if err := initImpl.ValidateConfig(); err != nil {
+				return err
+			}
+
+			a := app.New(initImpl)
+			return toCLIError(initImpl.GlobalImpl, a.Init(initImpl))
+		},
+	}
+	f := cmd.Flags()
+	f.BoolVar(&options.Force, "force", false, "Do not prompt, install dependencies required by helmfile")
+
+	return cmd
+}

cmd/root.go

@@ -81,6 +81,7 @@ func NewRootCmd(globalConfig *config.GlobalOptions) (*cobra.Command, error) {
 	}
 
 	cmd.AddCommand(
+		NewInitCmd(globalImpl),
 		NewApplyCmd(globalImpl),
 		NewBuildCmd(globalImpl),
 		NewCacheCmd(globalImpl),