Fix CargoCmd to implement Debug & be convertible into regular Command

Author: tuguzT

crates/spirv-builder/src/cargo_cmd.rs

@@ -1,7 +1,7 @@
 use std::collections::HashSet;
 use std::env;
 use std::ffi::{OsStr, OsString};
-use std::fmt::{Display, Formatter};
+use std::fmt::{Debug, Display, Formatter};
 use std::ops::{Deref, DerefMut};
 use std::process::Command;
 
@@ -107,7 +107,7 @@ impl Default for CargoCmd {
     }
 }
 
-impl Display for CargoCmd {
+impl Debug for CargoCmd {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         f.debug_struct("CargoCmd")
             .field("cargo", &self.cargo)
@@ -116,6 +116,12 @@ impl Display for CargoCmd {
     }
 }
 
+impl From<CargoCmd> for Command {
+    fn from(cmd: CargoCmd) -> Self {
+        cmd.cargo
+    }
+}
+
 impl Deref for CargoCmd {
     type Target = Command;
 

crates/spirv-builder/src/lib.rs

@@ -1059,7 +1059,7 @@ fn invoke_rustc(builder: &SpirvBuilder) -> Result<PathBuf, SpirvBuilderError> {
     );
 
     cargo.stderr(Stdio::inherit()).current_dir(path_to_crate);
-    log::debug!("building shaders with `{cargo}`");
+    log::debug!("building shaders with `{cargo:?}`");
     let build = cargo.output().expect("failed to execute cargo build");
 
     // `get_last_artifact` has the side-effect of printing invalid lines, so