Try switching to thiserror #2

Cargo.toml

@@ -12,7 +12,15 @@ categories = ["command-line-utilities"]
 exclude = ["/tools/"]
 
 [features]
-bin = ["dep:clap", "dep:clap_complete", "dep:ctrlc", "dep:shadow-rs", "dep:sysinfo", "dep:winresource"]
+bin = [
+    "dep:anyhow",
+    "dep:clap",
+    "dep:clap_complete",
+    "dep:ctrlc",
+    "dep:shadow-rs",
+    "dep:sysinfo",
+    "dep:winresource"
+]
 
 [profile.release]
 strip = true
@@ -23,7 +31,7 @@ name = "keepawake"
 required-features = ["bin"]
 
 [dependencies]
-anyhow = "1.0.65"
+anyhow = { version = "1.0.65", optional = true }
 cfg-if = "1.0.0"
 clap = { version = "4.0.2", features = ["derive"], optional = true }
 clap_complete = { version = "4.0.2", optional = true }

src/lib.rs

@@ -27,6 +27,8 @@
 //! # try_main();
 //! ```
 
+use std::error;
+
 use derive_builder::Builder;
 use thiserror::Error;
 
@@ -38,7 +40,7 @@ pub enum Error {
     Builder(#[from] BuilderError),
 
     #[error("system: {0}")]
-    System(#[from] anyhow::Error),
+    System(#[from] Box<dyn error::Error + Send + Sync>),
 }
 
 #[derive(Builder, Debug)]

src/sys/linux.rs

@@ -7,7 +7,8 @@
 //! [ScreenSaver]: https://people.freedesktop.org/~hadess/idle-inhibition-spec/re01.html
 //! [systemd Inhibitor Locks]:(https://www.freedesktop.org/wiki/Software/systemd/inhibit/
 
-use anyhow::Result;
+use std::error;
+
 use zbus::{blocking::Connection, dbus_proxy};
 
 use crate::Options;
@@ -51,7 +52,7 @@ pub struct KeepAwake {
 }
 
 impl KeepAwake {
-    pub fn new(options: Options) -> Result<Self> {
+    pub fn new(options: Options) -> Result<Self, Box<dyn error::Error + Send + Sync>> {
         let mut awake = Self {
             options,
 

src/sys/macos.rs

@@ -4,7 +4,6 @@
 //!
 //! [`IOPMAssertionCreateWithName`]: https://developer.apple.com/documentation/iokit/1557134-iopmassertioncreatewithname
 
-use anyhow::{anyhow, Result};
 use apple_sys::IOKit::{
     kIOPMAssertionLevelOn, kIOReturnSuccess, CFStringRef, IOPMAssertionCreateWithName,
     IOPMAssertionRelease,
@@ -42,7 +41,7 @@ impl KeepAwake {
         Ok(awake)
     }
 
-    fn set(&mut self) -> Result<()> {
+    fn set(&mut self) -> Result<(), Box<dyn error::Error + Send + Sync>> {
         if self.options.display {
             unsafe {
                 let result = IOPMAssertionCreateWithName(
@@ -56,7 +55,7 @@ impl KeepAwake {
                 );
                 if result != kIOReturnSuccess as i32 {
                     // TODO Better error?
-                    return Err(anyhow!("IO error: {:#x}", result));
+                    return Err(format!("IO error: {:#x}", result).into());
                 }
             }
         }
@@ -72,7 +71,7 @@ impl KeepAwake {
                     &mut self.idle_assertion,
                 );
                 if result != kIOReturnSuccess as i32 {
-                    return Err(anyhow!("IO error: {:#x}", result));
+                    return Err(format!("IO error: {:#x}", result).into());
                 }
             }
         }
@@ -88,7 +87,7 @@ impl KeepAwake {
                     &mut self.sleep_assertion,
                 );
                 if result != kIOReturnSuccess as i32 {
-                    return Err(anyhow!("IO error: {:#x}", result));
+                    return Err(format!("IO error: {:#x}", result).into());
                 }
             }
         }

src/sys/windows.rs

@@ -7,7 +7,8 @@
 //! [`SetThreadExecutionState`]: https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-setthreadexecutionstate
 //! [`PowerSetRequest`]: https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-powersetrequest
 
-use anyhow::Result;
+use std::error;
+
 use windows::core::Error as WindowsError;
 use windows::Win32::System::Power::{
     SetThreadExecutionState, ES_AWAYMODE_REQUIRED, ES_CONTINUOUS, ES_DISPLAY_REQUIRED,
@@ -22,7 +23,7 @@ pub struct KeepAwake {
 }
 
 impl KeepAwake {
-    pub fn new(options: Options) -> Result<Self> {
+    pub fn new(options: Options) -> Result<Self, Box<dyn error::Error + Send + Sync>> {
         let mut awake = KeepAwake {
             options,
             previous: Default::default(),