link: update to clap 4

src/uu/link/Cargo.toml

@@ -15,7 +15,7 @@ edition = "2021"
 path = "src/link.rs"
 
 [dependencies]
-clap = { version = "3.2", features = ["wrap_help", "cargo"] }
+clap = { version = "4.0", features = ["wrap_help", "cargo"] }
 uucore = { version=">=0.0.16", package="uucore", path="../../uucore" }
 
 [[bin]]

src/uu/link/src/link.rs

@@ -35,7 +35,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
         .map_err_context(|| format!("cannot create link {} to {}", new.quote(), old.quote()))
 }
 
-pub fn uu_app<'a>() -> Command<'a> {
+pub fn uu_app() -> Command {
     Command::new(uucore::util_name())
         .version(crate_version!())
         .about(ABOUT)
@@ -45,9 +45,7 @@ pub fn uu_app<'a>() -> Command<'a> {
             Arg::new(options::FILES)
                 .hide(true)
                 .required(true)
-                .min_values(2)
-                .max_values(2)
-                .takes_value(true)
+                .num_args(2)
                 .value_hint(clap::ValueHint::AnyPath)
                 .value_parser(ValueParser::os_string()),
         )

tests/by-util/test_link.rs

@@ -50,9 +50,9 @@ fn test_link_nonexistent_file() {
 fn test_link_one_argument() {
     let (_, mut ucmd) = at_and_ucmd!();
     let file = "test_link_argument";
-    ucmd.args(&[file]).fails().stderr_contains(
-        "error: The argument '<FILES>...' requires at least 2 values but only 1 was provided",
-    );
+    ucmd.args(&[file])
+        .fails()
+        .stderr_contains("requires 2 values");
 }
 
 #[test]
@@ -63,7 +63,7 @@ fn test_link_three_arguments() {
         "test_link_argument2",
         "test_link_argument3",
     ];
-    ucmd.args(&arguments[..]).fails().stderr_contains(
-        format!("error: The value '{}' was provided to '<FILES>...' but it wasn't expecting any more values", arguments[2]),
-    );
+    ucmd.args(&arguments[..])
+        .fails()
+        .stderr_contains("requires 2 values");
 }