Implement a Delete Step [#4]

internal/run/delete.go

@@ -0,0 +1,52 @@
+package run
+
+import (
+	"fmt"
+)
+
+// Delete is an execution step that calls `helm upgrade` when executed.
+type Delete struct {
+	Release string
+	DryRun  bool
+
+	cmd cmd
+}
+
+// Execute executes the `helm upgrade` command.
+func (d *Delete) Execute(_ Config) error {
+	return d.cmd.Run()
+}
+
+// Prepare gets the Delete ready to execute.
+func (d *Delete) Prepare(cfg Config) error {
+	if d.Release == "" {
+		return fmt.Errorf("release is required")
+	}
+
+	args := []string{"--kubeconfig", cfg.KubeConfig}
+
+	if cfg.Namespace != "" {
+		args = append(args, "--namespace", cfg.Namespace)
+	}
+	if cfg.Debug {
+		args = append(args, "--debug")
+	}
+
+	args = append(args, "delete")
+
+	if d.DryRun {
+		args = append(args, "--dry-run")
+	}
+
+	args = append(args, d.Release)
+
+	d.cmd = command(helmBin, args...)
+	d.cmd.Stdout(cfg.Stdout)
+	d.cmd.Stderr(cfg.Stderr)
+
+	if cfg.Debug {
+		fmt.Fprintf(cfg.Stderr, "Generated command: '%s'\n", d.cmd.String())
+	}
+
+	return nil
+}