Even less unwraps

src/error.rs

@@ -6,6 +6,7 @@ https://github.com/JakeRoggenbuck/auto-clock-speed/issues/new/choose";
 pub enum Error {
     IO(std::io::Error),
     TimeError(std::time::SystemTimeError),
+    Parse,
     HdwNotFound,
     Unknown,
     DivisionByZero,
@@ -23,6 +24,12 @@ impl From<std::time::SystemTimeError> for Error {
     }
 }
 
+impl From<std::num::ParseIntError> for Error {
+    fn from(_: std::num::ParseIntError) -> Self {
+        Error::Parse
+    }
+}
+
 impl fmt::Debug for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         writeln!(f, "Something went wrong. Try running with sudo.")

src/power/battery.rs

@@ -86,8 +86,7 @@ impl Battery {
         sysfs::read(
             &mut self.capacity,
             &self.sys_parent_path.clone().join("capacity"),
-        )
-        .unwrap();
+        )?;
 
         Ok(())
     }
@@ -134,14 +133,12 @@ impl Battery {
         sysfs::read(
             &mut self.energy_full_design,
             &self.sys_parent_path.clone().join("energy_full_design"),
-        )
-        .unwrap();
+        )?;
 
         sysfs::read(
             &mut self.energy_full,
             &self.sys_parent_path.clone().join("energy_full"),
-        )
-        .unwrap();
+        )?;
         Ok(())
     }
 
@@ -150,14 +147,12 @@ impl Battery {
         sysfs::read(
             &mut self.charge_full_design,
             &self.sys_parent_path.clone().join("charge_full_design"),
-        )
-        .unwrap();
+        )?;
 
         sysfs::read(
             &mut self.charge_full,
             &self.sys_parent_path.clone().join("charge_full"),
-        )
-        .unwrap();
+        )?;
         Ok(())
     }
 

src/sysfs.rs

@@ -14,7 +14,7 @@ where
     file_content.pop();
 
     // Convert String to expected value
-    *val = file_content.parse::<T>().unwrap();
+    *val = file_content.parse::<T>().map_err(|_| Error::Unknown)?;
 
     Ok(())
 }
@@ -24,11 +24,13 @@ pub fn get_path_by_glob(sysfs_parent_path: &str, hdw_glob: &str) -> Result<PathB
     let mut glob_path = sysfs_parent_path.to_string();
     glob_path.push_str(hdw_glob);
 
-    let glob = Glob::new(&glob_path).unwrap().compile_matcher();
-    let entries = fs::read_dir(sysfs_parent_path).unwrap();
+    let glob = Glob::new(&glob_path)
+        .map_err(|_| Error::Unknown)?
+        .compile_matcher();
+    let entries = fs::read_dir(sysfs_parent_path).map_err(|_| Error::Unknown)?;
 
     for entry in entries {
-        let entry = entry.unwrap();
+        let entry = entry.map_err(|_| Error::Unknown)?;
         let pathbuf = entry.path();
         if glob.is_match(&pathbuf) {
             return Ok(pathbuf);

src/system.rs

@@ -40,10 +40,8 @@ pub fn get_highest_temp(cpus: &[CPU]) -> i32 {
     temp_max
 }
 
-fn open_cpu_info() -> String {
-    fs::read_to_string("/proc/cpuinfo").unwrap_or_else(|_| {
-        panic!("Could not read /proc/cpuinfo");
-    })
+fn open_cpu_info() -> Result<String, Error> {
+    Ok(fs::read_to_string("/proc/cpuinfo")?)
 }
 
 fn get_name_from_cpu_info(cpu_info: String) -> Result<String, Error> {
@@ -61,7 +59,7 @@ fn get_name_from_cpu_info(cpu_info: String) -> Result<String, Error> {
 }
 
 pub fn check_cpu_name() -> Result<String, Error> {
-    let cpu_info: String = open_cpu_info();
+    let cpu_info: String = open_cpu_info()?;
     let name: String = get_name_from_cpu_info(cpu_info)?;
     Ok(name)
 }
@@ -280,9 +278,7 @@ pub fn read_int(path: &str) -> Result<i32, Error> {
 
     // Remove trailing newline
     value.pop();
-    Ok(value
-        .parse::<i32>()
-        .unwrap_or_else(|e| panic!("Could not parse {}\n{}", path, e)))
+    Ok(value.parse::<i32>()?)
 }
 
 pub fn read_str(path: &str) -> Result<String, Error> {