add knecht

knecht/cmd/diff.go

@@ -0,0 +1,84 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/jensbecker/homelab/knecht/drift"
+	"github.com/jensbecker/homelab/knecht/stack"
+	"github.com/spf13/cobra"
+)
+
+var diffCmd = &cobra.Command{
+	Use:   "diff <stack>",
+	Short: "Show drift between local and deployed compose + env keys",
+	Args:  cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		_, client, svcPath, err := setup()
+		if err != nil {
+			return err
+		}
+
+		name := args[0]
+		local, err := stack.Get(svcPath, name)
+		if err != nil {
+			return err
+		}
+
+		remote, err := client.GetStackByName(name)
+		if err != nil {
+			return err
+		}
+		if remote == nil {
+			fmt.Printf("Stack %q is not deployed yet.\n", name)
+			return nil
+		}
+
+		remoteCompose, err := client.GetStackFile(remote.ID)
+		if err != nil {
+			return err
+		}
+		localCompose, err := local.ReadCompose()
+		if err != nil {
+			return err
+		}
+		exampleKeys, err := local.EnvExampleKeys()
+		if err != nil {
+			return err
+		}
+
+		portainerKeys := make([]string, len(remote.Env))
+		for i, e := range remote.Env {
+			portainerKeys[i] = e.Name
+		}
+
+		// Compose diff
+		composeDiff := drift.Compose(localCompose, remoteCompose)
+		fmt.Println("=== compose diff ===")
+		if len(composeDiff) == 0 {
+			fmt.Println("  in sync")
+		} else {
+			for _, line := range composeDiff {
+				fmt.Println("  " + line)
+			}
+		}
+
+		// Env key diff
+		missingKeys, unknownKeys := drift.EnvKeys(exampleKeys, portainerKeys)
+		fmt.Println("\n=== env keys ===")
+		if len(missingKeys) == 0 && len(unknownKeys) == 0 {
+			fmt.Println("  in sync")
+		}
+		for _, k := range missingKeys {
+			fmt.Printf("  ! missing in Portainer: %s\n", k)
+		}
+		for _, k := range unknownKeys {
+			fmt.Printf("  ? unknown (not in .env.example): %s\n", k)
+		}
+
+		return nil
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(diffCmd)
+}