feat: implement program plugin metadata saving

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/meta_plugin/program.rs

@@ -3,6 +3,7 @@ use log::*;
 use std::io::Write;
 use std::process::{Command, Stdio, Child};
 use which::which;
+use rusqlite::Connection;
 
 use crate::meta_plugin::MetaPlugin;
 
@@ -14,6 +15,9 @@ pub struct MetaPluginProgram {
     pub split_whitespace: bool,
     process: Option<Child>,
     writer: Option<Box<dyn Write>>,
+    item_id: Option<i64>,
+    conn: Option<*mut Connection>,
+    result: Option<String>,
 }
 
 impl std::fmt::Debug for MetaPluginProgram {
@@ -43,6 +47,9 @@ impl MetaPluginProgram {
             split_whitespace,
             process: None,
             writer: None,
+            item_id: None,
+            conn: None,
+            result: None,
         }
     }
 }
@@ -56,8 +63,12 @@ impl MetaPlugin for MetaPluginProgram {
         false
     }
 
-    fn initialize(&mut self, _conn: &rusqlite::Connection, _item_id: i64) -> Result<()> {
+    fn initialize(&mut self, conn: &rusqlite::Connection, item_id: i64) -> Result<()> {
         debug!("META: Initializing program plugin: {:?}", self);
+        
+        // Store database connection and item ID for later use
+        self.item_id = Some(item_id);
+        self.conn = Some(conn as *const _ as *mut Connection);
 
         let program = self.program.clone();
         let args = self.args.clone();
@@ -85,6 +96,46 @@ impl MetaPlugin for MetaPluginProgram {
 
     fn finalize(&mut self) -> Result<()> {
         debug!("META: Finalizing program plugin");
+        if let Some(mut process) = self.process.take() {
+            // Close stdin to signal end of input
+            drop(self.writer.take());
+            
+            // Wait for the process to complete
+            let output = process.wait_with_output()?;
+            
+            if output.status.success() {
+                // Process the output
+                let output_str = String::from_utf8_lossy(&output.stdout);
+                let result = if self.split_whitespace {
+                    output_str.split_whitespace().next().unwrap_or("").to_string()
+                } else {
+                    output_str.trim().to_string()
+                };
+                
+                if !result.is_empty() {
+                    debug!("META: Program output: {}", result);
+                    self.result = Some(result);
+                    
+                    // Save the result to database if we have connection and item_id
+                    if let (Some(conn), Some(item_id)) = (self.conn, self.item_id) {
+                        // Convert raw pointer back to reference (unsafe)
+                        let conn_ref = unsafe { &*conn };
+                        let meta = crate::db::Meta {
+                            id: item_id,
+                            name: self.meta_name.clone(),
+                            value: self.result.clone().unwrap(),
+                        };
+                        let _ = crate::db::store_meta(conn_ref, meta);
+                    }
+                }
+            } else {
+                debug!("META: Program failed with status: {:?}", output.status);
+                let stderr = String::from_utf8_lossy(&output.stderr);
+                if !stderr.is_empty() {
+                    debug!("META: Program stderr: {}", stderr);
+                }
+            }
+        }
         Ok(())
     }