feat: Add --address-file flag to repo announce command

This flag creates a file in the current working directory and writes
the `naddr` into it. This allows n34 and other tools to recognize the
repository address automatically, eliminating the need for manual input
by the user.

Signed-off-by: Awiteb <a@4rs.nl>

src/cli/mod.rs

@@ -49,6 +49,9 @@ Git repository: https://git.4rs.nl/awiteb/n34.git"#;
 /// Footer message, used in the help message
 const FOOTER: &str = r#"Please report bugs to <naddr1qqpkuve5qgsqqqqqq9g9uljgjfcyd6dm4fegk8em2yfz0c3qp3tc6mntkrrhawgrqsqqqauesksc39>."#;
 
+/// Name of the file storing the repository address
+pub const NOSTR_ADDRESS_FILE: &str = "nostr-address";
+
 /// The command-line interface options
 #[derive(Args, Clone)]
 #[clap(

src/cli/repo/announce.rs

@@ -14,11 +14,13 @@
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://gnu.org/licenses/gpl-3.0.html>.
 
+use std::fs;
+
 use clap::Args;
 use nostr::{event::EventBuilder, key::PublicKey, types::Url};
 
 use crate::{
-    cli::{CliOptions, CommandRunner},
+    cli::{CliOptions, CommandRunner, NOSTR_ADDRESS_FILE},
     error::N34Result,
     nostr_utils::{NostrClient, traits::NewGitRepositoryAnnouncement, utils},
 };
@@ -51,6 +53,10 @@ pub struct AnnounceArgs {
     /// Skip kebab-case validation for the repository ID
     #[arg(long)]
     force_id:     bool,
+    /// If set, creates a `nostr-address` file to enable automatic address
+    /// discovery by n34
+    #[arg(long)]
+    address_file: bool,
 }
 
 impl CommandRunner for AnnounceArgs {
@@ -80,6 +86,13 @@ impl CommandRunner for AnnounceArgs {
 
         let nevent = utils::new_nevent(event.id.expect("There is an id"), &write_relays)?;
         let naddr = utils::repo_naddr(user_pubk, &options.relays)?;
+
+        if self.address_file {
+            let path = std::env::current_dir()?.join(NOSTR_ADDRESS_FILE);
+            tracing::info!("Create the `nostr-address` file at `{}`", path.display());
+            fs::write(path, &naddr)?;
+        }
+
         client
             .send_event_to(event, relays_list.as_ref(), &write_relays)
             .await?;