fix: apply nightly clippy & fmt suggestions (#1922)

src/formatter/string_formatter.rs

@@ -349,28 +349,31 @@ impl<'a> StringFormatter<'a> {
 
 impl<'a> VariableHolder<String> for StringFormatter<'a> {
     fn get_variables(&self) -> BTreeSet<String> {
-        BTreeSet::from_iter(self.variables.keys().cloned())
+        self.variables.keys().cloned().collect()
     }
 }
 
 impl<'a> StyleVariableHolder<String> for StringFormatter<'a> {
     fn get_style_variables(&self) -> BTreeSet<String> {
-        BTreeSet::from_iter(self.style_variables.keys().cloned())
+        self.style_variables.keys().cloned().collect()
     }
 }
 
 fn clone_without_meta<'a>(variables: &VariableMapType<'a>) -> VariableMapType<'a> {
-    VariableMapType::from_iter(variables.iter().map(|(key, value)| {
-        let value = match value {
-            Some(Ok(value)) => match value {
-                VariableValue::Meta(_) => None,
-                other => Some(Ok(other.clone())),
-            },
-            Some(Err(e)) => Some(Err(e.clone())),
-            None => None,
-        };
-        (key.clone(), value)
-    }))
+    variables
+        .iter()
+        .map(|(key, value)| {
+            let value = match value {
+                Some(Ok(value)) => match value {
+                    VariableValue::Meta(_) => None,
+                    other => Some(Ok(other.clone())),
+                },
+                Some(Err(e)) => Some(Err(e.clone())),
+                None => None,
+            };
+            (key.clone(), value)
+        })
+        .collect()
 }
 
 #[cfg(test)]

src/modules/dotnet.rs

@@ -250,7 +250,7 @@ fn get_pinned_sdk_version(json: &str) -> Option<Version> {
     }
 }
 
-fn get_local_dotnet_files<'a>(context: &'a Context) -> Result<Vec<DotNetFile>, std::io::Error> {
+fn get_local_dotnet_files(context: &Context) -> Result<Vec<DotNetFile>, std::io::Error> {
     Ok(context
         .dir_contents()?
         .files()

src/modules/hostname.rs

@@ -31,7 +31,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
     //rustc doesn't let you do an "if" and an "if let" in the same if statement
     // if this changes in the future this can become a lot cleaner
-    let host = if config.trim_at != "" {
+    let host = if !config.trim_at.is_empty() {
         if let Some(index) = host.find(config.trim_at) {
             host.split_at(index).0
         } else {

src/modules/nim.rs

@@ -62,7 +62,7 @@ fn parse_nim_version(version_cmd_output: &str) -> Option<&str> {
         // First line has the version
         .next()?
         .split(' ')
-        .find(|&s| s.chars().all(|c| c >= '0' && c <= '9' || c == '.'))
+        .find(|&s| s.chars().all(|c| ('0'..='9').contains(&c) || c == '.'))
 }
 
 #[cfg(test)]

src/modules/time.rs

@@ -74,11 +74,10 @@ fn create_offset_time_string(
     time_format: &str,
 ) -> Result<String, &'static str> {
     // Using floats to allow 30/45 minute offsets: https://www.timeanddate.com/time/time-zones-interesting.html
-    let utc_time_offset_in_hours = match utc_time_offset_str.parse::<f32>() {
-        Ok(parsed_value) => parsed_value,
+    let utc_time_offset_in_hours = utc_time_offset_str.parse::<f32>().unwrap_or(
         // Passing out of range value to force falling back to "local"
-        Err(_) => 25_f32,
-    };
+        25_f32,
+    );
     if utc_time_offset_in_hours < 24_f32 && utc_time_offset_in_hours > -24_f32 {
         let utc_offset_in_seconds: i32 = (utc_time_offset_in_hours * 3600_f32) as i32;
         let timezone_offset = FixedOffset::east(utc_offset_in_seconds);

src/modules/utils/directory.rs

@@ -10,7 +10,7 @@ pub fn truncate(dir_string: String, length: usize) -> String {
     let mut components = dir_string.split('/').collect::<Vec<&str>>();
 
     // If the first element is "" then there was a leading "/" and we should remove it so we can check the actual count of components
-    if components[0] == "" {
+    if components[0].is_empty() {
         components.remove(0);
     }
 

src/modules/utils/directory_win.rs

@@ -101,7 +101,7 @@ pub fn is_write_allowed(folder_path: &Path) -> std::result::Result<bool, &'stati
     let mut priv_size = mem::size_of::<PRIVILEGE_SET>() as DWORD;
     let mut granted_access: DWORD = 0;
     let mut access_rights: DWORD = FILE_GENERIC_WRITE;
-    let mut result: BOOL = 0 as BOOL;
+    let mut result: BOOL = 0;
     unsafe { securitybaseapi::MapGenericMask(&mut access_rights, &mut mapping) };
     let rc = unsafe {
         securitybaseapi::AccessCheck(

src/print.rs

@@ -197,7 +197,7 @@ pub fn explain(args: ArgMatches) {
                 }
                 if escaping {
                     print!("{}", g);
-                    escaping = !("a" <= g && "z" >= g || "A" <= g && "Z" >= g);
+                    escaping = !(("a"..="z").contains(&g) || ("A"..="Z").contains(&g));
                     continue;
                 }