rust: fix clippy warnings

rust/bear/src/bin/bear.rs

@@ -6,7 +6,6 @@ use bear::modes::transformation::Transformation;
 use bear::modes::{All, Intercept, Mode, Semantic};
 use bear::output::OutputWriter;
 use bear::{args, config};
-use log;
 use std::env;
 use std::process::ExitCode;
 
@@ -86,6 +85,6 @@ impl Application {
             Application::All(all) => all.run(),
         };
         // TODO: log the status
-        status.unwrap_or_else(|_| ExitCode::FAILURE)
+        status.unwrap_or(ExitCode::FAILURE)
     }
 }

rust/bear/src/bin/wrapper.rs

@@ -94,21 +94,21 @@ fn next_in_path(target: &Path) -> Result<PathBuf> {
             };
             real_path != current_exe
         })
-        .nth(0)
+        .next()
         .ok_or_else(|| anyhow::anyhow!("Cannot find the real executable"))
 }
 
 fn report(execution: Execution) -> Result<()> {
     let event = Event {
-        pid: ProcessId(std::process::id() as u32),
+        pid: ProcessId(std::process::id()),
         execution,
     };
 
     // Get the reporter address from the environment
     std::env::var(KEY_DESTINATION)
         .with_context(|| format!("${} is missing from the environment", KEY_DESTINATION))
         // Create a new reporter
-        .and_then(|reporter_address| TcpReporter::new(reporter_address))
+        .and_then(TcpReporter::new)
         .with_context(|| "Cannot create TCP execution reporter")
         // Report the execution
         .and_then(|reporter| reporter.report(event))

rust/bear/src/config.rs

@@ -287,7 +287,7 @@ impl Validate for Intercept {
 /// Allow to customize the output format of the compiler calls.
 ///
 /// - Clang: Output the compiler calls in the clang project defined "JSON compilation database"
-/// format. (The format is used by clang tooling and other tools based on that library.)
+///   format. (The format is used by clang tooling and other tools based on that library.)
 /// - Semantic: Output the compiler calls in the semantic format. (The format is not defined yet.)
 #[derive(Debug, PartialEq, Deserialize, Serialize)]
 #[serde(tag = "specification")]
@@ -484,8 +484,8 @@ impl Validate for DuplicateFilter {
     fn validate(self) -> Result<Self> {
         let result = Self {
             by_fields: (&self.by_fields)
-                .into_iter()
-                .map(|field| field.clone())
+                .iter()
+                .cloned()
                 .collect::<HashSet<_>>()
                 .into_iter()
                 .collect(),

rust/bear/src/modes/intercept.rs

@@ -115,7 +115,7 @@ impl InterceptEnvironment {
                 // Create a temporary directory and populate it with the executables.
                 let bin_dir = tempfile::TempDir::with_prefix_in(directory, "bear-")?;
                 for executable in executables {
-                    std::fs::hard_link(&executable, &path)?;
+                    std::fs::hard_link(executable, path)?;
                 }
                 InterceptEnvironment::Wrapper { bin_dir, address }
             }

rust/bear/src/modes/recognition.rs

@@ -32,7 +32,7 @@ impl TryFrom<&config::Main> for Recognition {
         };
         let compilers_to_exclude = match &config.output {
             config::Output::Clang { compilers, .. } => compilers
-                .into_iter()
+                .iter()
                 .filter(|compiler| compiler.ignore == config::Ignore::Always)
                 .map(|compiler| compiler.path.clone())
                 .collect(),

rust/bear/src/modes/transformation.rs

@@ -37,7 +37,7 @@ impl Transformation {
             passes,
             working_dir,
         } = &input;
-        match self.lookup(&compiler) {
+        match self.lookup(compiler) {
             Some(config::Compiler {
                 ignore: config::Ignore::Always,
                 ..

rust/bear/src/output/filter.rs

@@ -78,7 +78,7 @@ mod builder {
             if paths.is_empty() {
                 Self::new()
             } else {
-                let owned_paths: Vec<PathBuf> = paths.iter().cloned().collect();
+                let owned_paths: Vec<PathBuf> = paths.to_vec();
                 Self::from(move |entry| owned_paths.iter().any(|path| entry.file.starts_with(path)))
             }
         }
@@ -153,7 +153,7 @@ mod builder {
     // FIXME: write unit tests for the hash function.
     /// Create a hash function that is using the given fields to calculate the hash of an entry.
     pub(super) fn create_hash(fields: &[config::OutputFields]) -> impl Fn(&Entry) -> u64 + 'static {
-        let owned_fields: Vec<config::OutputFields> = fields.iter().cloned().collect();
+        let owned_fields: Vec<config::OutputFields> = fields.to_vec();
         move |entry: &Entry| {
             let mut hasher = DefaultHasher::new();
             for field in &owned_fields {

rust/bear/src/output/mod.rs

@@ -161,14 +161,14 @@ pub fn into_entries(value: semantic::CompilerCall) -> Result<Vec<Entry>, anyhow:
 }
 
 fn into_arguments(
-    compiler: &PathBuf,
-    source: &PathBuf,
+    compiler: &Path,
+    source: &Path,
     output: &Option<PathBuf>,
     flags: &Vec<String>,
 ) -> Result<Vec<String>, anyhow::Error> {
     let mut arguments: Vec<String> = vec![];
     // Assemble the arguments as it would be for a single source file.
-    arguments.push(into_string(&compiler)?);
+    arguments.push(into_string(compiler)?);
     for flag in flags {
         arguments.push(flag.clone());
     }

rust/bear/src/semantic/interpreters/gcc.rs

@@ -88,13 +88,13 @@ mod internal {
     }
 
     /// Compiler flags are varies the number of arguments, but means one thing.
-    pub(crate) struct Argument<'a> {
+    pub(super) struct Argument<'a> {
         arguments: &'a [String],
         meaning: Meaning,
     }
 
     impl<'a> Argument<'a> {
-        pub(crate) fn passes(flags: &[Argument]) -> Vec<CompilerPass> {
+        pub(super) fn passes(flags: &[Argument]) -> Vec<CompilerPass> {
             let mut pass: Pass = Pass::Linker;
             let mut inputs: Vec<String> = vec![];
             let mut output: Option<String> = None;
@@ -106,13 +106,13 @@ mod internal {
                         stop_before: Some(Pass::Compiler),
                     } => {
                         pass = Pass::Preprocessor;
-                        args.extend(flag.arguments.into_iter().map(String::to_owned));
+                        args.extend(flag.arguments.iter().map(String::to_owned));
                     }
                     Meaning::ControlKindOfOutput {
                         stop_before: Some(Pass::Linker),
                     } => {
                         pass = Pass::Compiler;
-                        args.extend(flag.arguments.into_iter().map(String::to_owned));
+                        args.extend(flag.arguments.iter().map(String::to_owned));
                     }
                     Meaning::ControlKindOfOutput { .. }
                     | Meaning::ControlLanguage(_)
@@ -123,7 +123,7 @@ mod internal {
                     | Meaning::Optimize
                     | Meaning::Instrumentation
                     | Meaning::DirectorySearch(None) => {
-                        args.extend(flag.arguments.into_iter().map(String::to_owned));
+                        args.extend(flag.arguments.iter().map(String::to_owned));
                     }
                     Meaning::Input(_) => {
                         assert_eq!(flag.arguments.len(), 1);
@@ -156,7 +156,7 @@ mod internal {
         }
     }
 
-    pub(crate) fn compiler(i: &[String]) -> IResult<&[String], Argument> {
+    pub(super) fn compiler(i: &[String]) -> IResult<&[String], Argument> {
         let candidate = &i[0];
         if COMPILER_REGEX.is_match(candidate) {
             const MEANING: Meaning = Meaning::Compiler;
@@ -173,7 +173,7 @@ mod internal {
         }
     }
 
-    pub(crate) fn source(i: &[String]) -> IResult<&[String], Argument> {
+    pub(super) fn source(i: &[String]) -> IResult<&[String], Argument> {
         let candidate = &i[0];
         if looks_like_a_source_file(candidate.as_str()) {
             const MEANING: Meaning = Meaning::Input(Pass::Preprocessor);
@@ -189,7 +189,7 @@ mod internal {
         }
     }
 
-    pub(crate) fn flag(i: &[String]) -> IResult<&[String], Argument> {
+    pub(super) fn flag(_i: &[String]) -> IResult<&[String], Argument> {
         todo!()
     }
 

rust/bear/src/semantic/interpreters/generic.rs

@@ -14,7 +14,7 @@ pub(super) struct Generic {
 
 impl Generic {
     pub(super) fn from(compilers: &[PathBuf]) -> Box<dyn Interpreter> {
-        let executables = compilers.iter().map(|compiler| compiler.clone()).collect();
+        let executables = compilers.iter().cloned().collect();
         Box::new(Self { executables })
     }
 }

rust/bear/src/semantic/interpreters/ignore.rs

@@ -17,7 +17,7 @@ impl IgnoreByPath {
     }
 
     pub(super) fn from(compilers: &[PathBuf]) -> Box<dyn Interpreter> {
-        let executables = compilers.iter().map(|compiler| compiler.clone()).collect();
+        let executables = compilers.iter().cloned().collect();
         Box::new(Self { executables })
     }
 }