add feature parsing

also some small improvements

src/cargo.rs

@@ -115,6 +115,9 @@ pub fn cargo_metadata_with_args(
     if let Some(target) = args.and_then(|a| a.target.as_ref()) {
         command.args(["--filter-platform", target.triple()]);
     }
+    if let Some(features) = args.map(|a| &a.features) {
+        command.args([String::from("--features"), features.join(",")]);
+    }
     let output = command.output()?;
     let manifest: Option<CargoMetadata> =
         serde_json::from_slice(&output.stdout).wrap_err_with(|| {

src/cli.rs

@@ -12,6 +12,7 @@ pub struct Args {
     pub subcommand: Option<Subcommand>,
     pub channel: Option<String>,
     pub target: Option<Target>,
+    pub features: Vec<String>,
     pub target_dir: Option<PathBuf>,
     pub docker_in_docker: bool,
     pub manifest_path: Option<PathBuf>,
@@ -29,6 +30,7 @@ fn absolute_path(path: PathBuf) -> Result<PathBuf> {
 pub fn parse(target_list: &TargetList) -> Result<Args> {
     let mut channel = None;
     let mut target = None;
+    let mut features = Vec::new();
     let mut manifest_path: Option<PathBuf> = None;
     let mut target_dir = None;
     let mut sc = None;
@@ -67,6 +69,15 @@ pub fn parse(target_list: &TargetList) -> Result<Args> {
                     .split_once('=')
                     .map(|(_, t)| Target::from(t, target_list));
                 all.push(arg);
+            } else if arg == "--features" {
+                all.push(arg);
+                if let Some(t) = args.next() {
+                    features.push(t.clone());
+                    all.push(t);
+                }
+            } else if arg.starts_with("--features=") {
+                features.extend(arg.split_once('=').map(|(_, t)| t.to_owned()));
+                all.push(arg);
             } else if arg == "--target-dir" {
                 all.push(arg);
                 if let Some(td) = args.next() {
@@ -97,6 +108,7 @@ pub fn parse(target_list: &TargetList) -> Result<Args> {
         subcommand: sc,
         channel,
         target,
+        features,
         target_dir,
         docker_in_docker,
         manifest_path,

src/main.rs

@@ -463,10 +463,10 @@ pub(crate) fn warn_host_version_mismatch(
 
 /// Parses the `Cross.toml` at the root of the Cargo project or from the
 /// `CROSS_CONFIG` environment variable (if any exist in either location).
-fn toml(root: &CargoMetadata) -> Result<Option<CrossToml>> {
+fn toml(metadata: &CargoMetadata) -> Result<Option<CrossToml>> {
     let path = match env::var("CROSS_CONFIG") {
         Ok(var) => PathBuf::from(var),
-        Err(_) => root.workspace_root.join("Cross.toml"),
+        Err(_) => metadata.workspace_root.join("Cross.toml"),
     };
 
     if path.exists() {
@@ -479,7 +479,7 @@ fn toml(root: &CargoMetadata) -> Result<Option<CrossToml>> {
         Ok(Some(config))
     } else {
         // Checks if there is a lowercase version of this file
-        if root.workspace_root.join("cross.toml").exists() {
+        if metadata.workspace_root.join("cross.toml").exists() {
             eprintln!("There's a file named cross.toml, instead of Cross.toml. You may want to rename it, or it won't be considered.");
         }
         Ok(None)

src/tests.rs

@@ -7,7 +7,6 @@ use std::{
 
 use once_cell::sync::OnceCell;
 use rustc_version::VersionMeta;
-use serde::Deserialize;
 
 static WORKSPACE: OnceCell<PathBuf> = OnceCell::new();