feat: suggest similarly named features

Author: Jujumba

src/cargo/ops/cargo_add/mod.rs

@@ -29,6 +29,7 @@ use crate::core::Summary;
 use crate::core::Workspace;
 use crate::sources::source::QueryKind;
 use crate::util::cache_lock::CacheLockMode;
+use crate::util::edit_distance;
 use crate::util::style;
 use crate::util::toml::lookup_path_base;
 use crate::util::toml_mut::dependency::Dependency;
@@ -167,7 +168,20 @@ pub fn add(workspace: &Workspace<'_>, options: &AddOptions<'_>) -> CargoResult<(
             if activated.is_empty() && deactivated.is_empty() {
                 write!(message, "\n\nno features available for crate {}", dep.name)?;
             } else {
-                if !deactivated.is_empty() {
+                let mut suggested = false;
+                for unknown_feature in &unknown_features {
+                    let suggestion = edit_distance::closest_msg(
+                        unknown_feature,
+                        deactivated.iter().chain(activated.iter()),
+                        |dep| *dep,
+                        "feature",
+                    );
+                    if !suggestion.is_empty() {
+                        write!(message, "{suggestion}")?;
+                        suggested = true;
+                    }
+                }
+                if !deactivated.is_empty() && !suggested {
                     if deactivated.len() <= MAX_FEATURE_PRINTS {
                         write!(
                             message,
@@ -191,7 +205,7 @@ pub fn add(workspace: &Workspace<'_>, options: &AddOptions<'_>) -> CargoResult<(
                         )?;
                     }
                 }
-                if !activated.is_empty() {
+                if !activated.is_empty() && !suggested {
                     if deactivated.len() + activated.len() <= MAX_FEATURE_PRINTS {
                         writeln!(
                             message,