feat(install): Including Locking message

As we switch to MSRV-aware resolver, this will help users work out why
MSRV-aware resolving isn't helping them.

This will also make it more obvious if we breaking things when
developing the MSRV-aware resolver.

Author: epage

src/cargo/ops/resolve.rs

@@ -147,6 +147,7 @@ pub fn resolve_ws_with_opts<'gctx>(
             specs,
             add_patches,
         )?;
+        ops::print_lockfile_changes(ws, None, &resolved_with_overrides, &mut registry)?;
         (resolve, resolved_with_overrides)
     } else if ws.require_optional_deps() {
         // First, resolve the root_package's *listed* dependencies, as well as
@@ -205,6 +206,8 @@ pub fn resolve_ws_with_opts<'gctx>(
             specs,
             add_patches,
         )?;
+        // Skipping `print_lockfile_changes` as there are cases where this prints irrelevant
+        // information
         (resolve, resolved_with_overrides)
     };
 

tests/testsuite/directory.rs

@@ -148,6 +148,7 @@ fn simple_install() {
         .with_stderr(
             "\
 [INSTALLING] bar v0.1.0
+[LOCKING] 2 packages to latest compatible versions
 [COMPILING] foo v0.0.1
 [COMPILING] bar v0.1.0
 [FINISHED] `release` profile [optimized] target(s) in [..]s
@@ -243,6 +244,7 @@ fn install_without_feature_dep() {
         .with_stderr(
             "\
 [INSTALLING] bar v0.1.0
+[LOCKING] 2 packages to latest compatible versions
 [COMPILING] foo v0.0.1
 [COMPILING] bar v0.1.0
 [FINISHED] `release` profile [optimized] target(s) in [..]s

tests/testsuite/install.rs

@@ -2410,6 +2410,8 @@ fn self_referential() {
 [DOWNLOADING] crates ...
 [DOWNLOADED] foo v0.0.2 (registry [..])
 [INSTALLING] foo v0.0.2
+[LOCKING] 2 packages to latest compatible versions
+[ADDING] foo v0.0.1 (latest: v0.0.2)
 [DOWNLOADING] crates ...
 [DOWNLOADED] foo v0.0.1 (registry [..])
 [COMPILING] foo v0.0.1
@@ -2455,6 +2457,7 @@ fn ambiguous_registry_vs_local_package() {
             "\
 [INSTALLING] foo v0.1.0 ([..])
 [UPDATING] `[..]` index
+[LOCKING] 2 packages to latest compatible versions
 [DOWNLOADING] crates ...
 [DOWNLOADED] foo v0.0.1 (registry [..])
 [COMPILING] foo v0.0.1

tests/testsuite/publish_lockfile.rs

@@ -415,6 +415,7 @@ dependencies = [
             "\
 [UPDATING] `[..]` index
 [INSTALLING] foo v0.1.0
+[LOCKING] 2 packages to latest compatible versions
 [DOWNLOADING] crates ...
 [DOWNLOADED] bar v0.1.1 (registry `[..]`)
 [COMPILING] bar v0.1.1

tests/testsuite/required_features.rs

@@ -1129,6 +1129,7 @@ Consider enabling them by passing, e.g., `--features=\"bar/a\"`
         .with_stderr(
             "\
 [INSTALLING] foo v0.0.1 ([..])
+[LOCKING] 2 packages to latest compatible versions
 [FINISHED] `release` profile [optimized] target(s) in [..]
 [WARNING] none of the package's binaries are available for install using the selected features
   bin \"foo\" requires the features: `bar/a`