Add symlink for latest state

src/task.rs

@@ -193,6 +193,7 @@ pub fn run_v2() -> Result<(), Box<dyn Error>> {
     Ok(())
 }
 
+#[allow(dead_code)]
 pub trait Validate {
     type Type: fmt::Debug + Default + 'static;
     type Error: fmt::Debug + ToString;

src/task/cluster.rs

@@ -801,7 +801,7 @@ impl Cluster {
             .build()?;
 
         state.dump_by_uid(&state_dir)?;
-        state.dump_by_path(latest_path)?;
+        state.symlink_latest(latest_path)?;
 
         Ok(self)
     }

src/task/cluster/fs.rs

@@ -69,6 +69,8 @@ impl FsInteraction {
     }
 }
 
+#[allow(dead_code)]
+
 pub trait TryIntoFile {
     type Error;
 
@@ -126,6 +128,7 @@ impl<'a> From<&'a ArgMatches> for IO<PathBuf, PathBuf> {
     }
 }
 
+#[allow(dead_code)]
 pub trait TryMap<A, B> {
     type Error;
     type Output;

src/task/state.rs

@@ -2,6 +2,7 @@ use std::{
     fmt::Display,
     fs::{create_dir_all, remove_dir_all, File},
     io::{self, Read, Write},
+    os::unix::fs,
     path::PathBuf,
 };
 
@@ -112,6 +113,10 @@ impl State {
         self.dump_by_path(&format!("{state_dir}/{}.gz", &self.uid))
     }
 
+    pub fn symlink_latest(&mut self, latest: &str) -> Result<(), io::Error> {
+        fs::symlink(&format!("{}.gz", &self.uid), latest)
+    }
+
     pub fn from_latest(args: &ArgMatches) -> Result<Self, StateError> {
         let path = format!(
             "{}/latest.gz",