fix: use data_dir from config.toml if present

fixes: https://todo.sr.ht/~gheartsfield/nostr-rs-relay/64

config.toml

@@ -24,7 +24,7 @@ description = "A newly created nostr-rs-relay.\n\nCustomize this with your own i
 # Directory for SQLite files.  Defaults to the current directory.  Can
 # also be specified (and overriden) with the "--db dirname" command
 # line option.
-data_directory = "."
+#data_directory = "."
 
 
 # Use an in-memory database instead of 'nostr.db'.

src/cli.rs

@@ -7,8 +7,7 @@ pub struct CLIArgs {
         short,
         long,
         help = "Use the <directory> as the location of the database",
-        default_value = ".",
-        required = false
+        required = false,
     )]
-    pub db: String,
+    pub db: Option<String>,
 }

src/main.rs

@@ -31,13 +31,12 @@ fn main() {
     let args = CLIArgs::parse();
 
     // get database directory from args
-    let db_dir = args.db;
+    let db_dir_arg = args.db;
 
-    // update with database location
-    if db_dir.len() > 0 {
+    // update with database location from args, if provided
+    if let Some(db_dir) = db_dir_arg {
         settings.database.data_directory = db_dir;
     }
-
     let (_, ctrl_rx): (MpscSender<()>, MpscReceiver<()>) = syncmpsc::channel();
     // run this in a new thread
     let handle = thread::spawn(|| {