refactor: extract core logic to a plain Go package

commands/evm.go

@@ -0,0 +1,48 @@
+package commands
+
+import (
+	"github.com/jimeh/evm/manager"
+	"github.com/spf13/cobra"
+)
+
+func NewEvm(mgr *manager.Manager) (*cobra.Command, error) {
+	cmd := &cobra.Command{
+		Use:   "evm",
+		Short: "A simple and opinionated Emacs Version Manager and build tool",
+	}
+
+	configCmd, err := NewConfig(mgr)
+	if err != nil {
+		return nil, err
+	}
+
+	listCmd, err := NewList(mgr)
+	if err != nil {
+		return nil, err
+	}
+
+	useCmd, err := NewUse(mgr)
+	if err != nil {
+		return nil, err
+	}
+
+	rehashCmd, err := NewRehash(mgr)
+	if err != nil {
+		return nil, err
+	}
+
+	execCmd, err := NewExec(mgr)
+	if err != nil {
+		return nil, err
+	}
+
+	cmd.AddCommand(
+		configCmd,
+		listCmd,
+		useCmd,
+		rehashCmd,
+		execCmd,
+	)
+
+	return cmd, nil
+}