Refator DependencyBuilder construction

tests/ui.rs

@@ -118,22 +118,23 @@ fn miri_config(target: &str, path: &str, mode: Mode, with_dependencies: bool) ->
     config.comment_defaults.base().add_custom("edition", Edition("2021".into()));
 
     if with_dependencies {
-        // Set the `cargo-miri` binary, which we expect to be in the same folder as the `miri` binary.
-        // (It's a separate crate, so we don't get an env var from cargo.)
-        let mut program = CommandBuilder::cargo();
-        program.program = {
-            let mut prog = miri_path();
-            prog.set_file_name(format!("cargo-miri{}", env::consts::EXE_SUFFIX));
-            prog
-        };
-        let builder_args = ["miri", "run"]; // There is no `cargo miri build` so we just use `cargo miri run`.
-        program.args = builder_args.into_iter().map(Into::into).collect();
-        let crate_manifest_path = Path::new("test_dependencies").join("Cargo.toml");
-        // Reset `RUSTFLAGS` to work around <https://github.com/rust-lang/rust/pull/119574#issuecomment-1876878344>.
-        program.envs.push(("RUSTFLAGS".into(), None));
         config.comment_defaults.base().set_custom(
             "dependencies",
-            DependencyBuilder { program, crate_manifest_path, build_std: None },
+            DependencyBuilder {
+                program: CommandBuilder {
+                    // Set the `cargo-miri` binary, which we expect to be in the same folder as the `miri` binary.
+                    // (It's a separate crate, so we don't get an env var from cargo.)
+                    program: miri_path()
+                        .with_file_name(format!("cargo-miri{}", env::consts::EXE_SUFFIX)),
+                    // There is no `cargo miri build` so we just use `cargo miri run`.
+                    args: ["miri", "run"].into_iter().map(Into::into).collect(),
+                    // Reset `RUSTFLAGS` to work around <https://github.com/rust-lang/rust/pull/119574#issuecomment-1876878344>.
+                    envs: vec![("RUSTFLAGS".into(), None)],
+                    ..CommandBuilder::cargo()
+                },
+                crate_manifest_path: Path::new("test_dependencies").join("Cargo.toml"),
+                build_std: None,
+            },
         );
     }
     config