cargo: clippy

rust/ares/src/disk.rs

@@ -8,7 +8,7 @@ use lmdb::{Cursor, Environment, EnvironmentFlags, Error as LmdbError, Transactio
 use lmdb_sys as ffi;
 use std::convert::TryInto;
 use std::fs;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 use std::result::Result as StdResult;
 
 #[derive(Debug, PartialEq)]
@@ -48,8 +48,8 @@ impl Disk {
         let (_, high) = lmdb_gulf(&env);
         Disk {
             dir: log_dir,
-            epoch: epoch,
-            env: env,
+            epoch,
+            env,
             done: high,
         }
     }
@@ -57,7 +57,7 @@ impl Disk {
 
 /// Get the number of the latest epoch in the given directory, or return
 /// an error if there are no epochs or the path specified isn't a directory.
-pub fn epoch_last(log_dir: &PathBuf) -> Result<u64> {
+pub fn epoch_last(log_dir: &Path) -> Result<u64> {
     if !log_dir.is_dir() {
         return Err(Error::InvalidPath);
     }
@@ -65,9 +65,8 @@ pub fn epoch_last(log_dir: &PathBuf) -> Result<u64> {
     let mut some = false;
     let mut last = 0;
 
-    if let Ok(entries) = fs::read_dir(log_dir.clone()) {
-        for entry in entries {
-            if let Ok(entry) = entry {
+    if let Ok(entries) = fs::read_dir(log_dir) {
+        for entry in entries.flatten() {
             if let Some(name) = entry.file_name().to_str() {
                 if let Some(epoch) = name.strip_prefix("0i") {
                     if let Ok(n) = epoch.parse::<u64>() {
@@ -80,7 +79,6 @@ pub fn epoch_last(log_dir: &PathBuf) -> Result<u64> {
             }
         }
     }
-    }
 
     if some {
         return Ok(last);
@@ -91,7 +89,7 @@ pub fn epoch_last(log_dir: &PathBuf) -> Result<u64> {
 
 /// Read a value from the metadata database.
 pub fn disk_read_meta(env: &Environment, key: &str) -> Result<u64> {
-    lmdb_read_meta(env, key).map_err(|e| Error::Lmdb(e))
+    lmdb_read_meta(env, key).map_err(Error::Lmdb)
 }
 
 /// Read a single event `eve` from the database.

rust/ares/src/lmdb.rs

@@ -28,7 +28,7 @@ pub fn lmdb_gulf(env: &Environment) -> (u64, u64) {
             let low = u64::from_le_bytes(first.try_into().unwrap());
             if let Some(last) = cursor.get(None, None, ffi::MDB_LAST).unwrap().0 {
                 let high = u64::from_le_bytes(last.try_into().unwrap());
-                return (low, high);
+                (low, high)
             } else {
                 panic!("Couldn't get last event from the database");
             }

rust/ares/src/main.rs

@@ -1,6 +1,6 @@
 use ares::jets::hot::URBIT_HOT_STATE;
 use ares::mars::{mars_play, Mars};
-use ares::serf::{Context, serf};
+use ares::serf::{serf, Context};
 use ares::trace::{create_trace_file, write_metadata};
 use std::env;
 use std::io;

rust/ares/src/mars.rs

@@ -1,12 +1,12 @@
-use std::{cmp::min, path::PathBuf};
 use std::fmt::{Display, Formatter, Result as FmtResult};
 use std::result::Result as StdResult;
+use std::{cmp::min, path::PathBuf};
 
 use crate::disk::*;
 use crate::hamt::Hamt;
 use crate::jets::list::util::lent;
 use crate::lmdb::lmdb_gulf;
-use crate::noun::{D, Noun};
+use crate::noun::{Noun, D};
 use crate::persist::pma_close;
 use crate::serf::{clear_interrupt, play_life, work, Context};
 
@@ -45,7 +45,6 @@ pub struct Mars {
 
     /// Last event processed.
     pub done: u64,
-
 }
 
 /// Do a boot.
@@ -68,7 +67,10 @@ pub fn mars_play(mut mars: Mars, mut eve: u64, _sap: u64) -> u64 {
         eve = mars.ctx.log.done;
     } else if eve <= mars.ctx.log.done {
         eprintln!("mars: already computed {}\r", eve);
-        eprintln!("      state={}, &mut mars.log={}\r", mars.done, mars.ctx.log.done);
+        eprintln!(
+            "      state={}, &mut mars.log={}\r",
+            mars.done, mars.ctx.log.done
+        );
         return played;
     } else {
         eve = min(eve, mars.ctx.log.done);
@@ -96,7 +98,12 @@ pub fn mars_play(mut mars: Mars, mut eve: u64, _sap: u64) -> u64 {
     if (eve + 1) == mars.ctx.log.done {
         eprintln!("play: event {}\r", mars.ctx.log.done);
     } else if eve != mars.ctx.log.done {
-        eprintln!("play: events {}-{} of {}\r", (mars.done + 1), eve, mars.ctx.log.done);
+        eprintln!(
+            "play: events {}-{} of {}\r",
+            (mars.done + 1),
+            eve,
+            mars.ctx.log.done
+        );
     } else {
         eprintln!("play: events {}-{}\r", (mars.done + 1), eve);
     }

rust/ares/src/serf.rs

@@ -187,7 +187,7 @@ impl Context {
             arvo,
             mug,
             nock_context,
-            log
+            log,
         }
     }
 
@@ -319,7 +319,7 @@ pub fn serf(constant_hot_state: &[HotEntry]) -> io::Result<()> {
         .ok_or(io::Error::new(io::ErrorKind::Other, "no pier path"))?;
     let pier_path = PathBuf::from(pier_path_string);
     let snap_path = pier_path.join(".urb/chk");
-    create_dir_all(&snap_path)?;
+    create_dir_all(snap_path)?;
 
     let wag: u32 = std::env::args()
         .nth(4)