fix(link): take url as string arg

cmd/link.go

@@ -1,38 +1,26 @@
 package cmd
 
 import (
-	"errors"
-	"fmt"
-
 	"github.com/spf13/cobra"
 	"github.com/supabase/cli/internal/link"
 )
 
 var (
-	useUrl bool
+	deployDbUrl string
 
 	linkCmd = &cobra.Command{
 		Use:   "link",
 		Short: "Link the current project to a remote deploy database.",
 		RunE: func(cmd *cobra.Command, args []string) error {
-			if useUrl {
-				var deployDbUrl string
-				fmt.Scanln(&deployDbUrl)
-				if len(deployDbUrl) == 0 {
-					return errors.New("Error on `supabase link`: URL is empty.")
-				}
-
-				return link.Link(deployDbUrl)
-			}
-
-			return errors.New("Use `--url` to pass the deploy database URL to link to.")
+			return link.Link(deployDbUrl)
 		},
 	}
 )
 
 func init() {
 	linkCmd.Flags().
-		BoolVar(&useUrl, "url", false, "Accept Postgres connection string of the deploy database from standard input.")
+		StringVar(&deployDbUrl, "url", "", "Postgres connection string of the deploy database.")
+	cobra.CheckErr(linkCmd.MarkFlagRequired("url"))
 
 	rootCmd.AddCommand(linkCmd)
 }

examples/tour/README.md

@@ -25,7 +25,7 @@ supabase init
 This will create a `supabase` directory which is managed by the CLI. Then we need to link the current project with the deploy database. Use the connection string from your Supabase project here.
 
 ```sh
-supabase link --url <<< 'postgresql://postgres:<your_password>@db.<your_project_ref>.supabase.co:5432/postgres'
+supabase link --url 'postgresql://postgres:<your_password>@db.<your_project_ref>.supabase.co:5432/postgres'
 ```
 
 Why do we need to do this? Because if we want to manage a database with a migration tool, we need a _baseline_ where both the migration tool and the database have consistent schemas. `supabase link` does this synchronization between the two.