mv: check if --target is a directory

src/uu/mv/src/error.rs

@@ -15,6 +15,7 @@ pub enum MvError {
     DirectoryToNonDirectory(String),
     NonDirectoryToDirectory(String, String),
     NotADirectory(String),
+    TargetNotADirectory(String),
 }
 
 impl Error for MvError {}
@@ -34,7 +35,8 @@ impl Display for MvError {
             Self::NonDirectoryToDirectory(s, t) => {
                 write!(f, "cannot overwrite non-directory {t} with directory {s}")
             }
-            Self::NotADirectory(t) => write!(f, "target {t} is not a directory"),
+            Self::NotADirectory(t) => write!(f, "target {t}: Not a directory"),
+            Self::TargetNotADirectory(t) => write!(f, "target directory {t}: Not a directory"),
         }
     }
 }

src/uu/mv/src/mv.rs

@@ -320,7 +320,12 @@ fn exec(files: &[OsString], b: &Behavior) -> UResult<()> {
 
 fn move_files_into_dir(files: &[PathBuf], target_dir: &Path, b: &Behavior) -> UResult<()> {
     if !target_dir.is_dir() {
-        return Err(MvError::NotADirectory(target_dir.quote().to_string()).into());
+        match b.target_dir {
+            Some(_) => {
+                return Err(MvError::TargetNotADirectory(target_dir.quote().to_string()).into())
+            }
+            None => return Err(MvError::NotADirectory(target_dir.quote().to_string()).into()),
+        }
     }
 
     let canonized_target_dir = target_dir

tests/by-util/test_mv.rs

@@ -55,6 +55,63 @@ fn test_mv_move_file_into_dir() {
     assert!(at.file_exists(format!("{dir}/{file}")));
 }
 
+#[test]
+fn test_mv_move_file_into_dir_with_target_arg() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let dir = "test_mv_move_file_into_dir_with_target_arg_dir";
+    let file = "test_mv_move_file_into_dir_with_target_arg_file";
+
+    at.mkdir(dir);
+    at.touch(file);
+
+    ucmd.arg("--target")
+        .arg(dir)
+        .arg(file)
+        .succeeds()
+        .no_stderr();
+
+    assert!(at.file_exists(format!("{dir}/{file}")))
+}
+
+#[test]
+fn test_mv_move_file_into_file_with_target_arg() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let file1 = "test_mv_move_file_into_file_with_target_arg_file1";
+    let file2 = "test_mv_move_file_into_file_with_target_arg_file2";
+
+    at.touch(file1);
+    at.touch(file2);
+
+    ucmd.arg("--target")
+        .arg(file1)
+        .arg(file2)
+        .fails()
+        .stderr_is(format!("mv: target directory '{file1}': Not a directory\n"));
+
+    assert!(at.file_exists(file1))
+}
+
+#[test]
+fn test_mv_move_multiple_files_into_file() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let file1 = "test_mv_move_multiple_files_into_file1";
+    let file2 = "test_mv_move_multiple_files_into_file2";
+    let file3 = "test_mv_move_multiple_files_into_file3";
+
+    at.touch(file1);
+    at.touch(file2);
+    at.touch(file3);
+
+    ucmd.arg(file1)
+        .arg(file2)
+        .arg(file3)
+        .fails()
+        .stderr_is(format!("mv: target '{file3}': Not a directory\n"));
+
+    assert!(at.file_exists(file1));
+    assert!(at.file_exists(file2));
+}
+
 #[test]
 fn test_mv_move_file_between_dirs() {
     let (at, mut ucmd) = at_and_ucmd!();

util/build-gnu.sh

@@ -220,6 +220,9 @@ sed -i -Ez "s/\n([^\n#]*pad-3\.2[^\n]*)\n([^\n]*)\n([^\n]*)/\n# uutils\/numfmt s
 
 # Update the GNU error message to match the one generated by clap
 sed -i -e "s/\$prog: multiple field specifications/error: The argument '--field <FIELDS>' was provided more than once, but cannot be used multiple times\n\nUsage: numfmt [OPTION]... [NUMBER]...\n\n\nFor more information try '--help'/g" tests/misc/numfmt.pl
+sed -i -e "s/Try 'mv --help' for more information/For more information, try '--help'/g" tests/mv/diag.sh
+sed -i -e "s/mv: missing file operand/error: the following required arguments were not provided:\n  <files>...\n\nUsage: mv [OPTION]... [-T] SOURCE DEST\n       mv [OPTION]... SOURCE... DIRECTORY\n       mv [OPTION]... -t DIRECTORY SOURCE...\n/g" tests/mv/diag.sh
+sed -i -e "s/mv: missing destination file operand after 'no-file'/error: The argument '<files>...' requires at least 2 values, but only 1 was provided\n\nUsage: mv [OPTION]... [-T] SOURCE DEST\n       mv [OPTION]... SOURCE... DIRECTORY\n       mv [OPTION]... -t DIRECTORY SOURCE...\n/g" tests/mv/diag.sh
 
 # GNU doesn't support width > INT_MAX
 # disable these test cases