Final updates

Author: andrew-corbalt

cmd/rds-iam-to-dsn/README.md

@@ -1,4 +1,4 @@
-# rds-iam-dsn
+# rds-iam-to-dsn
 
 A CLI that resolves a `postgres+rds-iam://...` URL into a usable tokenized PostgreSQL DSN and prints it to stdout.
 
@@ -7,13 +7,13 @@ Use this when you want to script `psql`, `pg_dump`, or other Postgres tools with
 ## Installation
 
 ```bash
-go install github.com/corbaltcode/go-libraries/cmd/rds-iam-dsn@latest
+go install github.com/corbaltcode/go-libraries/cmd/rds-iam-to-dsn@latest
 ```
 
 Or build from source:
 
 ```bash
-cd ./cmd/rds-iam-dsn
+cd ./cmd/rds-iam-to-dsn
 go build
 ```
 
@@ -27,7 +27,7 @@ go build
 ## Usage
 
 ```bash
-rds-iam-dsn '<postgres+rds-iam-url>'
+rds-iam-to-dsn '<postgres+rds-iam-url>'
 ```
 
 - Database path is optional. If omitted, `pgutils` defaults DB name to the username.
@@ -38,33 +38,33 @@ rds-iam-dsn '<postgres+rds-iam-url>'
 Resolve DSN only:
 
 ```bash
-rds-iam-dsn 'postgres+rds-iam://app_user@mydb.abc123.us-east-1.rds.amazonaws.com:5432/myapp'
+rds-iam-to-dsn 'postgres+rds-iam://app_user@mydb.abc123.us-east-1.rds.amazonaws.com:5432/myapp'
 ```
 
 Use with `psql` in a script:
 
 ```bash
-DSN="$(rds-iam-dsn 'postgres+rds-iam://app_user@mydb.abc123.us-east-1.rds.amazonaws.com:5432/myapp')"
+DSN="$(rds-iam-to-dsn 'postgres+rds-iam://app_user@mydb.abc123.us-east-1.rds.amazonaws.com:5432/myapp')"
 psql "$DSN"
 ```
 
 Or directly:
 
 ```bash
-psql "$(rds-iam-dsn 'postgres+rds-iam://app_user@mydb.abc123.us-east-1.rds.amazonaws.com:5432/myapp')"
+psql "$(rds-iam-to-dsn 'postgres+rds-iam://app_user@mydb.abc123.us-east-1.rds.amazonaws.com:5432/myapp')"
 ```
 
 Use with `pg_dump`:
 
 ```bash
-DSN="$(rds-iam-dsn 'postgres+rds-iam://app_user@mydb.abc123.us-east-1.rds.amazonaws.com:5432/myapp')"
+DSN="$(rds-iam-to-dsn 'postgres+rds-iam://app_user@mydb.abc123.us-east-1.rds.amazonaws.com:5432/myapp')"
 pg_dump "$DSN" > myapp.sql
 ```
 
 Cross-account role assumption:
 
 ```bash
-rds-iam-dsn 'postgres+rds-iam://app_user@mydb.abc123.us-east-1.rds.amazonaws.com:5432/myapp?assume_role_arn=arn:aws:iam::123456789012:role/db-connect&assume_role_session_name=rds-iam-dsn'
+rds-iam-to-dsn 'postgres+rds-iam://app_user@mydb.abc123.us-east-1.rds.amazonaws.com:5432/myapp?assume_role_arn=arn:aws:iam::123456789012:role/db-connect&assume_role_session_name=foo'
 ```
 
 ## Troubleshooting

cmd/rds-iam-to-dsn/main.go

@@ -3,37 +3,35 @@ package main
 import (
 	"context"
 	"fmt"
+	"log"
 	"os"
 
 	"github.com/corbaltcode/go-libraries/pgutils"
 )
 
 func main() {
+	log.SetFlags(0) // no timestamps — keep output clean for CLI use
+
 	if len(os.Args) != 2 {
-		fmt.Fprintf(
-			os.Stderr,
-			"expected exactly one positional RDS IAM connection URL argument, got %d\nUsage:\n  %s 'postgres+rds-iam://user@host:5432/db'\n",
-			len(os.Args)-1,
+		fmt.Fprintf(os.Stderr,
+			"Usage: %s 'postgres+rds-iam://user@host:5432/db'\n",
 			os.Args[0],
 		)
 		os.Exit(2)
 	}
-	rawURL := os.Args[1]
 
+	rawURL := os.Args[1]
 	ctx := context.Background()
 
 	connectionStringProvider, err := pgutils.NewConnectionStringProviderFromURLString(ctx, rawURL)
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "failed to create connection string provider: %v\n", err)
-		os.Exit(1)
+		log.Fatalf("failed to create connection string provider: %v", err)
 	}
 
 	dsnWithToken, err := connectionStringProvider.ConnectionString(ctx)
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "failed to get connection string from provider: %v\n", err)
-		os.Exit(1)
+		log.Fatalf("failed to get connection string from provider: %v", err)
 	}
 
-	// Print only the final DSN to stdout for command-substitution in scripts.
 	fmt.Println(dsnWithToken)
 }