fix(add): Clarify which version the features are added for

This gives a hint to users that we might not be showing the feature list
for the latest version but the earliest version.

Also when using a workspace dependency or re-using an existing
dependency, this is a good reminder of what the version requirement is
that was selected.

However, when the user or add (the common case) selected a full
precision requirement, this is redundant.

I'm also mixed on whether the meta version should show up.

Fixes #11073

Author: epage

src/cargo/ops/cargo_add/mod.rs

@@ -601,18 +601,21 @@ fn populate_dependency(mut dependency: Dependency, arg: &DepOp) -> Dependency {
 
 pub struct DependencyEx {
     dep: Dependency,
+    available_version: Option<semver::Version>,
     available_features: BTreeMap<String, Vec<String>>,
 }
 
 impl DependencyEx {
     fn new(dep: Dependency) -> Self {
         Self {
             dep,
+            available_version: None,
             available_features: Default::default(),
         }
     }
 
     fn apply_summary(&mut self, summary: &Summary) {
+        self.available_version = Some(summary.version().clone());
         self.available_features = summary
             .features()
             .iter()
@@ -765,7 +768,15 @@ fn print_msg(shell: &mut Shell, dep: &DependencyEx, section: &[String]) -> Cargo
     deactivated.sort();
     if !activated.is_empty() || !deactivated.is_empty() {
         let prefix = format!("{:>13}", " ");
-        shell.write_stderr(format_args!("{}Features:\n", prefix), &ColorSpec::new())?;
+        let suffix = if let Some(version) = &dep.available_version {
+            format!(" as of v{}", version)
+        } else {
+            "".to_owned()
+        };
+        shell.write_stderr(
+            format_args!("{}Features{}:\n", prefix, suffix),
+            &ColorSpec::new(),
+        )?;
         for feat in activated {
             shell.write_stderr(&prefix, &ColorSpec::new())?;
             shell.write_stderr('+', &ColorSpec::new().set_bold(true).set_fg(Some(Green)))?;

tests/testsuite/cargo_add/add_normalized_name_external/stderr.log

@@ -2,7 +2,7 @@
 warning: translating `linked_hash_map` to `linked-hash-map`
 warning: translating `Inflector` to `inflector`
       Adding linked-hash-map v0.5.4 to dependencies.
-             Features:
+             Features as of v0.5.4:
              - clippy
              - heapsize
              - heapsize_impl
@@ -11,7 +11,7 @@ warning: translating `Inflector` to `inflector`
              - serde_impl
              - serde_test
       Adding inflector v0.11.4 to dependencies.
-             Features:
+             Features as of v0.11.4:
              + heavyweight
              + lazy_static
              + regex

tests/testsuite/cargo_add/build_prefer_existing_version/stderr.log

@@ -1,4 +1,4 @@
       Adding cargo-list-test-fixture-dependency (local) to build-dependencies.
-             Features:
+             Features as of v0.0.0:
              - one
              - two

tests/testsuite/cargo_add/detect_workspace_inherit_features/stderr.log

@@ -1,5 +1,5 @@
       Adding foo (workspace) to dependencies.
-             Features:
+             Features as of v0.0.0:
              + default-base
              + default-merge-base
              + default-test-base

tests/testsuite/cargo_add/dev_prefer_existing_version/stderr.log

@@ -1,4 +1,4 @@
       Adding cargo-list-test-fixture-dependency (local) to dev-dependencies.
-             Features:
+             Features as of v0.0.0:
              - one
              - two

tests/testsuite/cargo_add/features/stderr.log

@@ -1,6 +1,6 @@
     Updating `dummy-registry` index
       Adding your-face v99999.0.0 to dependencies.
-             Features:
+             Features as of v99999.0.0+my-package:
              + eyes
              - ears
              - mouth

tests/testsuite/cargo_add/features_empty/stderr.log

@@ -1,6 +1,6 @@
     Updating `dummy-registry` index
       Adding your-face v99999.0.0 to dependencies.
-             Features:
+             Features as of v99999.0.0+my-package:
              - ears
              - eyes
              - mouth

tests/testsuite/cargo_add/features_multiple_occurrences/stderr.log

@@ -1,6 +1,6 @@
     Updating `dummy-registry` index
       Adding your-face v99999.0.0 to dependencies.
-             Features:
+             Features as of v99999.0.0+my-package:
              + eyes
              + nose
              - ears

tests/testsuite/cargo_add/features_preserve/stderr.log

@@ -1,6 +1,6 @@
     Updating `dummy-registry` index
       Adding your-face v99999.0.0 to dependencies.
-             Features:
+             Features as of v99999.0.0+my-package:
              + eyes
              - ears
              - mouth

tests/testsuite/cargo_add/features_spaced_values/stderr.log

@@ -1,6 +1,6 @@
     Updating `dummy-registry` index
       Adding your-face v99999.0.0 to dependencies.
-             Features:
+             Features as of v99999.0.0+my-package:
              + eyes
              + nose
              - ears