cli: add 'node restore' command for undeleting nodes

Restores a deleted node to its last non-deleted content with proper
version continuity (version number continues from absolute latest,
content from last live version).

Co-Authored-By: Proof of Concept <poc@bcachefs.org>

src/cli/node.rs

@@ -32,6 +32,17 @@ pub async fn cmd_node_rename(old_key: &str, new_key: &str) -> Result<()> {
     Ok(())
 }
 
+pub async fn cmd_node_restore(key: &[String]) -> Result<()> {
+    if key.is_empty() {
+        bail!("node-restore requires a key");
+    }
+    super::check_dry_run();
+    let key = key.join(" ");
+    let result = memory::memory_restore(None, &key).await?;
+    println!("{}", result);
+    Ok(())
+}
+
 pub async fn cmd_render(key: &[String]) -> Result<()> {
     if key.is_empty() {
         bail!("render requires a key");

src/hippocampus/mod.rs

@@ -298,6 +298,7 @@ memory_tool!(memory_search, ref, keys: [Vec<String>], max_hops: [Option<u32>], e
 memory_tool!(memory_link_set, mut, source: [str], target: [str], strength: [f32]);
 memory_tool!(memory_link_add, mut, source: [str], target: [str]);
 memory_tool!(memory_delete, mut, key: [str]);
+memory_tool!(memory_restore, mut, key: [str]);
 memory_tool!(memory_history, ref, key: [str], full: [Option<bool>]);
 memory_tool!(memory_weight_set, mut, key: [str], weight: [f32]);
 memory_tool!(memory_rename, mut, old_key: [str], new_key: [str]);

src/main.rs

@@ -175,6 +175,11 @@ enum NodeCmd {
         /// Node key
         key: Vec<String>,
     },
+    /// Restore a deleted node to its last live state
+    Restore {
+        /// Node key
+        key: Vec<String>,
+    },
     /// Rename a node key
     Rename {
         /// Old key
@@ -309,6 +314,9 @@ enum AdminCmd {
     Topology,
     /// Run consistency checks and repair
     Fsck,
+    /// Rebuild index from capnp logs (use after fsck finds issues)
+    #[command(name = "repair-index")]
+    RepairIndex,
     /// Find and merge duplicate nodes (same key, multiple UUIDs)
     Dedup {
         /// Apply the merge (default: dry run)
@@ -397,7 +405,8 @@ impl Run for Command {
 impl Run for NodeCmd {
     async fn run(self) -> anyhow::Result<()> {
         match self {
-            Self::Delete { key }            => cli::node::cmd_node_delete(&key).await,
+            Self::Delete { key }             => cli::node::cmd_node_delete(&key).await,
+            Self::Restore { key }            => cli::node::cmd_node_restore(&key).await,
             Self::Rename { old_key, new_key } => cli::node::cmd_node_rename(&old_key, &new_key).await,
         }
     }
@@ -445,6 +454,7 @@ impl Run for AdminCmd {
             Self::Health        => cli::admin::cmd_health().await,
             Self::Topology      => cli::admin::cmd_topology().await,
             Self::Fsck          => cli::admin::cmd_fsck().await,
+            Self::RepairIndex   => cli::admin::cmd_repair_index().await,
             Self::Dedup { apply } => cli::admin::cmd_dedup(apply).await,
             Self::DailyCheck    => cli::admin::cmd_daily_check().await,
             Self::LoadContext { stats } => cli::node::cmd_load_context(stats).await,