Update clap version and cleanup some new warnings

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "runwhen"
-version = "0.0.3"
+version = "0.0.4"
 authors = ["Jeremy Wall <jeremy@marzhillstudios.com>"]
 description = "Runs a command on user specified triggers."
 repository = "https://github.com/zaphar/runwhen"
@@ -9,6 +9,6 @@ keywords = ["file", "watcher", "command-line", "trigger"]
 license = "Apache-2.0"
 
 [dependencies]
-clap = "~2.19.0"
+clap = "~2.34"
 humantime = "~1.0.0"
 notify = "~3.0.0"

src/error.rs

@@ -11,7 +11,6 @@
 //  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 //  See the License for the specific language governing permissions and
 //  limitations under the License.
-use std::error::Error;
 use std::fmt;
 
 use notify;
@@ -35,6 +34,6 @@ impl fmt::Display for CommandError {
 
 impl From<notify::Error> for CommandError {
     fn from(e: notify::Error) -> CommandError {
-        CommandError::new(e.description().to_string())
+        CommandError::new(format!("{}", e))
     }
 }

src/file.rs

@@ -11,18 +11,18 @@
 //  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 //  See the License for the specific language governing permissions and
 //  limitations under the License.
-use std::thread;
-use std::sync::{Arc, Mutex};
-use std::time::Duration;
 use std::path::Path;
 use std::sync::mpsc::channel;
+use std::sync::{Arc, Mutex};
+use std::thread;
+use std::time::Duration;
 
-use notify::{Watcher, RecursiveMode, watcher};
+use notify::{watcher, RecursiveMode, Watcher};
 
-use traits::Process;
 use error::CommandError;
 use events::WatchEventType;
 use exec::run_cmd;
+use traits::Process;
 
 pub struct FileProcess<'a> {
     cmd: &'a str,
@@ -33,12 +33,13 @@ pub struct FileProcess<'a> {
 }
 
 impl<'a> FileProcess<'a> {
-    pub fn new(cmd: &'a str,
-               env: Option<Vec<&'a str>>,
-               file: &'a str,
-               method: WatchEventType,
-               poll: Duration)
-               -> FileProcess<'a> {
+    pub fn new(
+        cmd: &'a str,
+        env: Option<Vec<&'a str>>,
+        file: &'a str,
+        method: WatchEventType,
+        poll: Duration,
+    ) -> FileProcess<'a> {
         FileProcess {
             cmd: cmd,
             env: env,
@@ -49,9 +50,20 @@ impl<'a> FileProcess<'a> {
     }
 }
 
-fn spawn_runner_thread(lock: Arc<Mutex<bool>>, cmd: String,
-                       env: Option<Vec<&str>>, poll: Duration) {
-    let copied_env = env.and_then(|v| Some(v.iter().cloned().map(|s| String::from(s)).collect::<Vec<String>>()));
+fn spawn_runner_thread(
+    lock: Arc<Mutex<bool>>,
+    cmd: String,
+    env: Option<Vec<&str>>,
+    poll: Duration,
+) {
+    let copied_env = env.and_then(|v| {
+        Some(
+            v.iter()
+                .cloned()
+                .map(|s| String::from(s))
+                .collect::<Vec<String>>(),
+        )
+    });
     thread::spawn(move || {
         let copied_env_refs: Option<Vec<&str>> = match copied_env {
             Some(ref vec) => {
@@ -60,7 +72,7 @@ fn spawn_runner_thread(lock: Arc<Mutex<bool>>, cmd: String,
                     refs.push(s);
                 }
                 Some(refs)
-            },
+            }
             None => None,
         };
         loop {
@@ -68,34 +80,37 @@ fn spawn_runner_thread(lock: Arc<Mutex<bool>>, cmd: String,
             thread::sleep(poll);
             // Default to not running the command.
             match lock.lock() {
-                Ok(mut signal) => if *signal {
-                    // set signal to false so we won't trigger on the
-                    // next loop iteration unless we recieved more events.
-                    *signal = false;
-                    // Run our command!
-                    println!("exec: {}", cmd);
-                    if let Err(err) = run_cmd(&cmd, &copied_env_refs) {
-                        println!("{:?}", err)
+                Ok(mut signal) => {
+                    if *signal {
+                        // set signal to false so we won't trigger on the
+                        // next loop iteration unless we recieved more events.
+                        *signal = false;
+                        // Run our command!
+                        println!("exec: {}", cmd);
+                        if let Err(err) = run_cmd(&cmd, &copied_env_refs) {
+                            println!("{:?}", err)
+                        }
                     }
-                },
+                }
                 Err(err) => {
                     println!("Unexpected error; {}", err);
-                    return
+                    return;
                 }
             }
         }
     });
 }
 
-fn wait_for_fs_events(lock: Arc<Mutex<bool>>,
-                      method: WatchEventType,
-                      file: &str)
-                      -> Result<(), CommandError> {
+fn wait_for_fs_events(
+    lock: Arc<Mutex<bool>>,
+    method: WatchEventType,
+    file: &str,
+) -> Result<(), CommandError> {
     // Notify requires a channel for communication.
     let (tx, rx) = channel();
-    let mut watcher = try!(watcher(tx, Duration::from_secs(1)));
+    let mut watcher = watcher(tx, Duration::from_secs(1))?;
     // TODO(jwall): Better error handling.
-    try!(watcher.watch(file, RecursiveMode::Recursive));
+    watcher.watch(file, RecursiveMode::Recursive)?;
     println!("Watching {:?}", file);
     loop {
         let evt: WatchEventType = match rx.recv() {
@@ -115,15 +130,13 @@ fn wait_for_fs_events(lock: Arc<Mutex<bool>>,
                     *signal = true;
                 }
             }
-            WatchEventType::Changed => {
-                match lock.lock() {
-                    Ok(mut signal) => *signal = true,
-                    Err(err) => {
-                        println!("Unexpected error; {}", err);
-                        return Ok(())
-                    }
+            WatchEventType::Changed => match lock.lock() {
+                Ok(mut signal) => *signal = true,
+                Err(err) => {
+                    println!("Unexpected error; {}", err);
+                    return Ok(());
                 }
-            }
+            },
         }
     }
 }
@@ -133,12 +146,19 @@ impl<'a> Process for FileProcess<'a> {
         // NOTE(jwall): this is necessary because notify::fsEventWatcher panics
         // if the path doesn't exist. :-(
         if !Path::new(self.file).exists() {
-            return Err(CommandError::new(format!("No such path! {0}", self.file).to_string()));
+            return Err(CommandError::new(
+                format!("No such path! {0}", self.file).to_string(),
+            ));
         }
         // TODO(jeremy): Is this sufficent or do we want to ignore
         // any events that come in while the command is running?
         let lock = Arc::new(Mutex::new(false));
-        spawn_runner_thread(lock.clone(), self.cmd.to_string(), self.env.clone(), self.poll);
+        spawn_runner_thread(
+            lock.clone(),
+            self.cmd.to_string(),
+            self.env.clone(),
+            self.poll,
+        );
         wait_for_fs_events(lock, self.method.clone(), self.file)
     }
 }

src/main.rs

@@ -20,18 +20,18 @@ extern crate notify;
 use std::process;
 use std::str::FromStr;
 
-mod traits;
-mod file;
-mod timer;
 mod error;
 mod events;
 mod exec;
+mod file;
+mod timer;
+mod traits;
 
-use traits::Process;
+use events::WatchEventType;
+use exec::ExecProcess;
 use file::FileProcess;
 use timer::TimerProcess;
-use exec::ExecProcess;
-use events::WatchEventType;
+use traits::Process;
 
 fn do_flags<'a>() -> clap::ArgMatches<'a> {
     clap_app!(
@@ -68,7 +68,7 @@ fn do_flags<'a>() -> clap::ArgMatches<'a> {
               "How frequently to test command (default 5s)")
             )
     )
-        .get_matches()
+    .get_matches()
 }
 
 fn main() {
@@ -83,7 +83,7 @@ fn main() {
         }
         maybe_env = Some(env_vec);
     }
-    let mut process: Option<Box<Process>> = None;
+    let mut process: Option<Box<dyn Process>> = None;
     if let Some(matches) = app.subcommand_matches("watch") {
         // Unwrap because this flag is required.
         let file = matches.value_of("file").unwrap_or(".");
@@ -94,11 +94,15 @@ fn main() {
         let poll = matches.value_of("poll").unwrap_or("5s");
         let dur = humantime::parse_duration(poll).expect("Invalid poll value.");
         process = Some(Box::new(FileProcess::new(
-            cmd, maybe_env, file, method, dur)));
+            cmd, maybe_env, file, method, dur,
+        )));
     } else if let Some(matches) = app.subcommand_matches("timer") {
         // Unwrap because this flag is required.
-        let dur = humantime::parse_duration(matches.value_of("duration")
-            .expect("duration flag is required"));
+        let dur = humantime::parse_duration(
+            matches
+                .value_of("duration")
+                .expect("duration flag is required"),
+        );
         match dur {
             Ok(duration) => {
                 let max_repeat = if let Some(val) = matches.value_of("repeat") {
@@ -114,7 +118,8 @@ fn main() {
                     None
                 };
                 process = Some(Box::new(TimerProcess::new(
-                    cmd, maybe_env, duration, max_repeat)));
+                    cmd, maybe_env, duration, max_repeat,
+                )));
             }
             Err(msg) => {
                 println!("Malformed duration {:?}", msg);
@@ -127,7 +132,9 @@ fn main() {
         let negate = matches.is_present("not");
         let dur = humantime::parse_duration(matches.value_of("poll").unwrap_or("5s"));
         process = match dur {
-            Ok(duration) => Some(Box::new(ExecProcess::new(ifcmd, cmd, negate, maybe_env, duration))),
+            Ok(duration) => Some(Box::new(ExecProcess::new(
+                ifcmd, cmd, negate, maybe_env, duration,
+            ))),
             Err(msg) => {
                 println!("Malformed poll {:?}", msg);
                 process::exit(1)
@@ -135,15 +142,13 @@ fn main() {
         }
     }
     match process {
-        Some(process) => {
-            match process.run() {
-                Ok(_) => return,
-                Err(err) => {
-                    println!("{0}", err);
-                    process::exit(1)
-                }
+        Some(process) => match process.run() {
+            Ok(_) => return,
+            Err(err) => {
+                println!("{0}", err);
+                process::exit(1)
             }
-        }
+        },
         None => {
             println!("You must specify a subcommand.");
             process::exit(1)