Respect --no-run when using custom runner

Also do some other small cleanups for minor optimizations

Author: ian-h-chamberlain

Cargo.lock

@@ -160,30 +160,7 @@ impl CargoCmd {
         match self {
             CargoCmd::Build(build) => build.passthrough.cargo_args(),
             CargoCmd::Run(run) => run.build_args.passthrough.cargo_args(),
-            CargoCmd::Test(test) => {
-                let mut cargo_args = test.run_args.build_args.passthrough.cargo_args();
-
-                // We can't run 3DS executables on the host, but we want to respect
-                // the user's "runner" configuration if set.
-                //
-                // If doctests were requested, `--no-run` will be rejected on the
-                // command line and must be set with RUSTDOCFLAGS instead:
-                // https://github.com/rust-lang/rust/issues/87022
-                if !test.run_args.use_custom_runner() && !test.doc {
-                    cargo_args.push("--no-run".to_string());
-                }
-
-                if test.doc {
-                    cargo_args.extend([
-                        "--doc".into(),
-                        // https://github.com/rust-lang/cargo/issues/7040
-                        "-Z".into(),
-                        "doctest-xcompile".into(),
-                    ]);
-                }
-
-                cargo_args
-            }
+            CargoCmd::Test(test) => test.cargo_args(),
             CargoCmd::New(new) => {
                 // We push the original path in the new command (we captured it in [`New`] to learn about the context)
                 let mut cargo_args = new.cargo_args.cargo_args();
@@ -493,6 +470,46 @@ impl Test {
             self.run_args.callback(config);
         }
     }
+
+    fn should_run(&self) -> bool {
+        self.run_args.use_custom_runner() && !self.no_run
+    }
+
+    /// The args to pass to the underlying `cargo test` command.
+    fn cargo_args(&self) -> Vec<String> {
+        let mut cargo_args = self.run_args.build_args.passthrough.cargo_args();
+
+        // We can't run 3DS executables on the host, but we want to respect
+        // the user's "runner" configuration if set.
+        //
+        // If doctests were requested, `--no-run` will be rejected on the
+        // command line and must be set with RUSTDOCFLAGS instead:
+        // https://github.com/rust-lang/rust/issues/87022
+
+        if self.doc {
+            cargo_args.extend([
+                "--doc".into(),
+                // https://github.com/rust-lang/cargo/issues/7040
+                "-Z".into(),
+                "doctest-xcompile".into(),
+            ]);
+        } else if !self.should_run() {
+            cargo_args.push("--no-run".into());
+        }
+
+        cargo_args
+    }
+
+    /// Flags to pass to rustdoc via RUSTDOCFLAGS
+    pub(crate) fn rustdocflags(&self) -> &'static str {
+        if self.should_run() {
+            ""
+        } else {
+            // We don't support running doctests by default, but cargo doesn't like
+            // --no-run for doctests, so we have to plumb it in via RUSTDOCFLAGS
+            " --no-run"
+        }
+    }
 }
 
 const TOML_CHANGES: &str = r#"ctru-rs = { git = "https://github.com/rust3ds/ctru-rs" }

src/command.rs

@@ -10,7 +10,6 @@ use cargo_metadata::{Message, MetadataCommand};
 use command::{Input, Test};
 use rustc_version::Channel;
 use semver::Version;
-use serde::Deserialize;
 use tee::TeeReader;
 
 use crate::command::{CargoCmd, Run};
@@ -98,16 +97,8 @@ pub fn make_cargo_command(input: &Input, message_format: &Option<String>) -> Com
     }
 
     if let CargoCmd::Test(test) = cargo_cmd {
-        let no_run_flag = if test.run_args.use_custom_runner() {
-            ""
-        } else {
-            // We don't support running doctests by default, but cargo doesn't like
-            // --no-run for doctests, so we have to plumb it in via RUSTDOCFLAGS
-            " --no-run"
-        };
-
         // RUSTDOCFLAGS is simply ignored if --doc wasn't passed, so we always set it.
-        let rustdoc_flags = std::env::var("RUSTDOCFLAGS").unwrap_or_default() + no_run_flag;
+        let rustdoc_flags = std::env::var("RUSTDOCFLAGS").unwrap_or_default() + test.rustdocflags();
         command.env("RUSTDOCFLAGS", rustdoc_flags);
     }
 
@@ -212,6 +203,7 @@ pub fn check_rust_version() {
 /// in [`build_smdh`], [`build_3dsx`], and [`link`].
 pub fn get_metadata(messages: &[Message]) -> CTRConfig {
     let metadata = MetadataCommand::new()
+        .no_deps()
         .exec()
         .expect("Failed to get cargo metadata");
 
@@ -399,7 +391,7 @@ pub fn get_romfs_path(config: &CTRConfig) -> (PathBuf, bool) {
     (romfs_path, is_default)
 }
 
-#[derive(Deserialize, Default)]
+#[derive(Default)]
 pub struct CTRConfig {
     name: String,
     author: String,