From 8a3cff0dd7eb88cadb73a6df4e14f85450d63317 Mon Sep 17 00:00:00 2001
From: bndw <ben@bdw.to>
Date: Sat, 24 Jan 2026 16:55:52 -0800
Subject: Add auto-generated subdomain feature

When a base domain is configured on a host (e.g., apps.example.com),
deployments automatically get a subdomain ({name}.apps.example.com).
Custom --domain can still be provided to route both domains.

- Add BaseDomain field to Host state
- Add --base-domain flag to host init
- Add 'ship host set-domain' command to update base domain
- Update deploy flow to auto-generate subdomains
- Fix error display (errors were being silently swallowed)
- Remove placeholder email from Caddyfile template
---
 cmd/ship/host/set_domain.go | 76 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 cmd/ship/host/set_domain.go

(limited to 'cmd/ship/host/set_domain.go')

diff --git a/cmd/ship/host/set_domain.go b/cmd/ship/host/set_domain.go
new file mode 100644
index 0000000..fed3b31
--- /dev/null
+++ b/cmd/ship/host/set_domain.go
@@ -0,0 +1,76 @@
+package host
+
+import (
+	"fmt"
+
+	"github.com/bdw/ship/internal/state"
+	"github.com/spf13/cobra"
+)
+
+var setDomainCmd = &cobra.Command{
+	Use:   "set-domain [domain]",
+	Short: "Set base domain for auto-generated subdomains",
+	Long: `Set the base domain used to auto-generate subdomains for deployments.
+
+When a base domain is configured (e.g., apps.example.com), every deployment
+will automatically get a subdomain ({name}.apps.example.com).
+
+Examples:
+  ship host set-domain apps.example.com    # Set base domain
+  ship host set-domain --clear             # Remove base domain`,
+	RunE: runSetDomain,
+}
+
+func init() {
+	setDomainCmd.Flags().Bool("clear", false, "Clear the base domain")
+}
+
+func runSetDomain(cmd *cobra.Command, args []string) error {
+	st, err := state.Load()
+	if err != nil {
+		return fmt.Errorf("error loading state: %w", err)
+	}
+
+	host, _ := cmd.Flags().GetString("host")
+	if host == "" {
+		host = st.GetDefaultHost()
+	}
+
+	if host == "" {
+		return fmt.Errorf("--host is required")
+	}
+
+	clear, _ := cmd.Flags().GetBool("clear")
+
+	if !clear && len(args) == 0 {
+		// Show current base domain
+		hostState := st.GetHost(host)
+		if hostState.BaseDomain == "" {
+			fmt.Printf("No base domain configured for %s\n", host)
+		} else {
+			fmt.Printf("Base domain for %s: %s\n", host, hostState.BaseDomain)
+		}
+		return nil
+	}
+
+	hostState := st.GetHost(host)
+
+	if clear {
+		hostState.BaseDomain = ""
+		if err := st.Save(); err != nil {
+			return fmt.Errorf("error saving state: %w", err)
+		}
+		fmt.Printf("Cleared base domain for %s\n", host)
+		return nil
+	}
+
+	hostState.BaseDomain = args[0]
+	if err := st.Save(); err != nil {
+		return fmt.Errorf("error saving state: %w", err)
+	}
+
+	fmt.Printf("Set base domain for %s: %s\n", host, args[0])
+	fmt.Println("\nNew deployments will automatically use subdomains like:")
+	fmt.Printf("  myapp.%s\n", args[0])
+	return nil
+}
-- 
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