add NIP-21 content tags (q/p) to issues, comments, PRs and patches

- parse nostr: URI mentions in issue bodies, comment bodies, PR
  descriptions, patch commit messages and cover letters
- npub/nprofile mentions produce p tags; note/nevent/naddr mentions
  produce q tags per NIP-22
- naddr q tag value uses raw <kind>:<pubkey-hex>:<identifier> format
- nevent pubkey field populated from embedded author or local cache lookup
- dedup_tags() removes duplicate p tags and suppresses q tags whose
  event-id is already covered by an existing e threading tag
- all parsing errors are non-fatal: invalid nostr: tokens are skipped

1 files changed, 9 insertions, 1 deletions

diff --git a/src/bin/ngit/sub_commands/issue_create.rs b/src/bin/ngit/sub_commands/issue_create.rs
index 0c4b677..4543823 100644
--- a/src/bin/ngit/sub_commands/issue_create.rs
+++ b/src/bin/ngit/sub_commands/issue_create.rs
@@ -1,5 +1,8 @@
 use anyhow::{Context, Result, bail};
-use ngit::client::{Params, send_events, sign_event};
+use ngit::{
+    client::{Params, send_events, sign_event},
+    content_tags::{dedup_tags, tags_from_content},
+};
 use nostr::{EventBuilder, Tag, TagStandard, ToBech32, nips::nip19::Nip19Event};
 use nostr_sdk::Kind;
 
@@ -74,6 +77,11 @@ pub async fn launch(
         tags.push(Tag::public_key(*pk));
     }
 
+    // NIP-21 mention tags: q tags for cited events/addresses, p tags for cited
+    // pubkeys
+    tags.extend(tags_from_content(&body, Some(git_repo_path)).await?);
+    let tags = dedup_tags(tags);
+
     let issue_event = sign_event(
         EventBuilder::new(Kind::GitIssue, body).tags(tags),
         &signer,