Initial refactoring of displayz

- Bump Cargo.lock and dependencies.
- Use `cfg_attr` to expose platform-specific APIs in the `platform`
  module, then export with `pub use`.
- Create initial `common` module for abstracting displays.
- Make examples only run on Windows - pending refactoring of Windows
  backend.
- Add lints.

Author: shymega

Cargo.lock

@@ -13,9 +13,11 @@ keywords = ["display", "settings", "cli"]
 categories = ["command-line-utilities", "config"]
 
 [dependencies]
-color-eyre = "0.6.1"
-env_logger = "0.9.0"
-log = "0.4.17"
+color-eyre = "0.6.2"
+env_logger = "0.10.0"
+log = "0.4.18"
 structopt = "0.3.26"
-thiserror = "1.0.31"
-winsafe = { version = "0.0.10", features = ["user"] }
+thiserror = "1.0.40"
+
+[target.'cfg(target_os = "windows")'.dependencies]
+winsafe = { version = "0.0.16", features = ["user"] }

Cargo.toml

@@ -1,6 +1,8 @@
+#[cfg(windows)]
 use displayz::query_displays;
 
 /// Finds displays by name and index
+#[cfg(windows)]
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let display_set = query_displays()?;
     println!("Discovered displays:\n{}", display_set);
@@ -32,3 +34,6 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     Ok(())
 }
+
+#[cfg(not(windows))]
+fn main() {}

examples/find.rs

@@ -1,6 +1,8 @@
+#[cfg(windows)]
 use displayz::{query_displays, refresh};
 
 /// Sets a display to be the new primary display
+#[cfg(windows)]
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let display_set = query_displays()?;
     println!("Discovered displays:\n{}", display_set);
@@ -22,3 +24,6 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     Ok(())
 }
+
+#[cfg(not(windows))]
+fn main() {}

examples/primary.rs

@@ -1,6 +1,8 @@
+#[cfg(windows)]
 use displayz::{query_displays, refresh, Resolution};
 
 /// Prints and changes the current resolution of the primary display
+#[cfg(windows)]
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let display_set = query_displays()?;
     println!("Discovered displays:\n{}", display_set);
@@ -25,3 +27,6 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     Ok(())
 }
+
+#[cfg(not(windows))]
+fn main() {}