add nostr.repo-relay-only config to limit publishing to repo relays

Adds a git config key nostr.repo-relay-only that, when set to true, causes
nostr events to be sent only to the repository's own relays, skipping the
user's personal write relays and default/blaster relays. Useful for
repositories that should not broadcast to the maintainer's personal relay set.
Set persistently via \`git config nostr.repo-relay-only true\` or in one step
with \`ngit init --repo-relay-only\`.

3 files changed, 37 insertions, 3 deletions

diff --git a/src/bin/git_remote_nostr/push.rs b/src/bin/git_remote_nostr/push.rs
index ed0f7df..3b5e05d 100644
--- a/src/bin/git_remote_nostr/push.rs
+++ b/src/bin/git_remote_nostr/push.rs
@@ -402,6 +402,13 @@ async fn create_and_publish_events_and_proposals(
 
     // TODO check whether tip of each branch pushed is on at least one git server
     // before broadcasting the nostr state
+    let repo_relay_only =
+        if let Ok(Some(v)) = git_repo.get_git_config_item("nostr.repo-relay-only", None) {
+            v == "true"
+        } else {
+            false
+        };
+
     let relay_results = if events.is_empty() {
         vec![]
     } else {
@@ -409,7 +416,11 @@ async fn create_and_publish_events_and_proposals(
             client,
             Some(git_repo.get_path()?),
             events,
-            user_ref.relays.write(),
+            if repo_relay_only {
+                vec![]
+            } else {
+                user_ref.relays.write()
+            },
             repo_ref.relays.clone(),
             true,
             false,
diff --git a/src/bin/ngit/cli.rs b/src/bin/ngit/cli.rs
index 164035b..68b18a7 100644
--- a/src/bin/ngit/cli.rs
+++ b/src/bin/ngit/cli.rs
@@ -67,6 +67,9 @@ Or just for this repository:
 
 Other useful settings:
  - 'nostr.nostate true' to avoid publishing a state event when pushing to a nostr remote.
+ - 'nostr.repo-relay-only true' to only publish nostr events to repo relays, skipping user and
+   default relays. Useful for repositories where you don't want to broadcast to your personal
+   relay set. Set via `git config nostr.repo-relay-only true` or `ngit init --repo-relay-only`.
  - Login settings configured during `ngit account login`:
    - nostr.nsec - nsec or ncryptsec
    - nostr.npub - used for ncryptsec and remote signer
diff --git a/src/bin/ngit/sub_commands/init.rs b/src/bin/ngit/sub_commands/init.rs
index 021a33e..0554f32 100644
--- a/src/bin/ngit/sub_commands/init.rs
+++ b/src/bin/ngit/sub_commands/init.rs
@@ -430,6 +430,10 @@ pub struct SubCommandArgs {
     #[clap(long)]
     /// usually root commit but will be more recent commit for forks
     earliest_unique_commit: Option<String>,
+    #[clap(long)]
+    /// only publish nostr events to repo relays, not to user or default relays
+    /// (sets nostr.repo-relay-only in local git config)
+    repo_relay_only: bool,
 }
 
 impl SubCommandArgs {
@@ -444,6 +448,7 @@ impl SubCommandArgs {
             || !self.other_maintainers.is_empty()
             || !self.hashtag.is_empty()
             || self.earliest_unique_commit.is_some()
+            || self.repo_relay_only
     }
 }
 
@@ -1266,11 +1271,21 @@ async fn publish_and_finalize(
     // Step 5: Publish events
     client.set_signer(signer).await;
 
+    let repo_relay_only = git_repo
+        .get_git_config_item("nostr.repo-relay-only", None)
+        .ok()
+        .flatten()
+        .is_some_and(|s| s == "true");
+
     let _ = send_events(
         client,
         Some(git_repo_path),
         events,
-        user_ref.relays.write(),
+        if repo_relay_only {
+            vec![]
+        } else {
+            user_ref.relays.write()
+        },
         fields.relays.clone(),
         !cli.disable_cli_spinners,
         false,
@@ -1522,7 +1537,12 @@ pub async fn launch(cli_args: &Cli, args: &SubCommandArgs) -> Result<()> {
         cli_args.interactive,
     )?;
 
-    // Phase 6: Build and publish
+    // Phase 6: Persist --repo-relay-only flag to local git config if supplied
+    if args.repo_relay_only {
+        git_repo.save_git_config_item("nostr.repo-relay-only", "true", false)?;
+    }
+
+    // Phase 7: Build and publish
     publish_and_finalize(
         fields,
         signer,