Warnings for breaking changes to the configuration discovery of cargo install and cargo uninstall proposed in #11775

src/bin/cargo/commands/install.rs

@@ -90,7 +90,12 @@ pub fn exec(config: &mut Config, args: &ArgMatches) -> CliResult {
     if let Some(path) = &path {
         config.reload_rooted_at(path)?;
     } else {
-        // TODO: Consider calling set_search_stop_path(home).
+        config.shell().warn(
+            "the configuration discovery of `cargo install` will change in a \
+            future version.\n\
+            In the future, only the global configuration file \
+            `$CARGO_HOME/config.toml` will be considered by `cargo install`.",
+        )?;
         config.reload_rooted_at(config.home().clone().into_path_unlocked())?;
     }
 

src/bin/cargo/commands/uninstall.rs

@@ -14,6 +14,13 @@ pub fn cli() -> Command {
 }
 
 pub fn exec(config: &mut Config, args: &ArgMatches) -> CliResult {
+    config.shell().warn(
+        "the configuration discovery of `cargo uninstall` will change in a \
+        future version.\n\
+        In the future, only the global configuration file \
+        `$CARGO_HOME/config.toml` will be considered by `cargo uninstall`.",
+    )?;
+
     let root = args.get_one::<String>("root").map(String::as_str);
 
     if args.is_present_with_zero_values("package") {

tests/testsuite/install.rs

@@ -376,6 +376,23 @@ fn bad_paths() {
         .run();
 }
 
+#[cargo_test]
+fn warning_for_configuration_discovery_changes() {
+    pkg("foo", "0.0.1");
+
+    cargo_process("install foo")
+        .with_stderr_contains(
+            "warning: the configuration discovery of `cargo install` will change in a future version.",
+        )
+        .run();
+
+    cargo_process("uninstall foo")
+        .with_stderr_contains(
+            "warning: the configuration discovery of `cargo uninstall` will change in a future version.",
+        )
+        .run();
+}
+
 #[cargo_test]
 fn install_location_precedence() {
     pkg("foo", "0.0.1");