install: don't error when multiple arguments of the same type are given, instead override with last one (#8033) (#8053)

Author: jenningsfan

src/uu/install/src/install.rs

@@ -187,6 +187,7 @@ pub fn uu_app() -> Command {
         .about(get_message("install-about"))
         .override_usage(format_usage(&get_message("install-usage")))
         .infer_long_args(true)
+        .args_override_self(true)
         .arg(backup_control::arguments::backup())
         .arg(backup_control::arguments::backup_no_args())
         .arg(

tests/by-util/test_install.rs

@@ -447,6 +447,80 @@ fn test_install_nested_paths_copy_file() {
     assert!(at.file_exists(format!("{dir2}/{file1}")));
 }
 
+#[test]
+fn test_multiple_mode_arguments_override_not_error() {
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+    let dir = "source_dir";
+
+    let file = "source_file";
+    let gid = getegid();
+    let uid = geteuid();
+
+    at.touch(file);
+    at.mkdir(dir);
+
+    scene
+        .ucmd()
+        .args(&[
+            file,
+            &format!("{dir}/{file}"),
+            "--owner=invalid_owner",
+            "--owner",
+            &uid.to_string(),
+        ])
+        .succeeds()
+        .no_stderr();
+
+    scene
+        .ucmd()
+        .args(&[
+            file,
+            &format!("{dir}/{file}"),
+            "-o invalid_owner",
+            "-o",
+            &uid.to_string(),
+        ])
+        .succeeds()
+        .no_stderr();
+
+    scene
+        .ucmd()
+        .args(&[file, &format!("{dir}/{file}"), "--mode=999", "--mode=200"])
+        .succeeds()
+        .no_stderr();
+
+    scene
+        .ucmd()
+        .args(&[file, &format!("{dir}/{file}"), "-m 999", "-m 200"])
+        .succeeds()
+        .no_stderr();
+
+    scene
+        .ucmd()
+        .args(&[
+            file,
+            &format!("{dir}/{file}"),
+            "--group=invalid_group",
+            "--group",
+            &gid.to_string(),
+        ])
+        .succeeds()
+        .no_stderr();
+
+    scene
+        .ucmd()
+        .args(&[
+            file,
+            &format!("{dir}/{file}"),
+            "-g invalid_group",
+            "-g",
+            &gid.to_string(),
+        ])
+        .succeeds()
+        .no_stderr();
+}
+
 #[test]
 fn test_install_failing_omitting_directory() {
     let scene = TestScenario::new(util_name!());