install: implement the --no-target-directory option (#7867)

* implement --no-target-directory option

* add test for --no-target-directory

src/uu/install/src/install.rs

@@ -50,6 +50,7 @@ pub struct Behavior {
     strip_program: String,
     create_leading: bool,
     target_dir: Option<String>,
+    no_target_dir: bool,
 }
 
 #[derive(Error, Debug)]
@@ -104,6 +105,9 @@ enum InstallError {
 
     #[error("'{0}' and '{1}' are the same file")]
     SameFile(PathBuf, PathBuf),
+
+    #[error("extra operand {}\n{}", .0.quote(), .1.quote())]
+    ExtraOperand(String, String),
 }
 
 impl UError for InstallError {
@@ -279,11 +283,10 @@ pub fn uu_app() -> Command {
                 .value_hint(clap::ValueHint::DirPath),
         )
         .arg(
-            // TODO implement flag
             Arg::new(OPT_NO_TARGET_DIRECTORY)
                 .short('T')
                 .long(OPT_NO_TARGET_DIRECTORY)
-                .help("(unimplemented) treat DEST as a normal file")
+                .help("treat DEST as a normal file")
                 .action(ArgAction::SetTrue),
         )
         .arg(
@@ -328,9 +331,7 @@ pub fn uu_app() -> Command {
 ///
 ///
 fn check_unimplemented(matches: &ArgMatches) -> UResult<()> {
-    if matches.get_flag(OPT_NO_TARGET_DIRECTORY) {
-        Err(InstallError::Unimplemented(String::from("--no-target-directory, -T")).into())
-    } else if matches.get_flag(OPT_PRESERVE_CONTEXT) {
+    if matches.get_flag(OPT_PRESERVE_CONTEXT) {
         Err(InstallError::Unimplemented(String::from("--preserve-context, -P")).into())
     } else if matches.get_flag(OPT_CONTEXT) {
         Err(InstallError::Unimplemented(String::from("--context, -Z")).into())
@@ -368,6 +369,11 @@ fn behavior(matches: &ArgMatches) -> UResult<Behavior> {
 
     let backup_mode = backup_control::determine_backup_mode(matches)?;
     let target_dir = matches.get_one::<String>(OPT_TARGET_DIRECTORY).cloned();
+    let no_target_dir = matches.get_flag(OPT_NO_TARGET_DIRECTORY);
+    if target_dir.is_some() && no_target_dir {
+        show_error!("Options --target-directory and --no-target-directory are mutually exclusive");
+        return Err(1.into());
+    }
 
     let preserve_timestamps = matches.get_flag(OPT_PRESERVE_TIMESTAMPS);
     let compare = matches.get_flag(OPT_COMPARE);
@@ -430,6 +436,7 @@ fn behavior(matches: &ArgMatches) -> UResult<Behavior> {
         ),
         create_leading: matches.get_flag(OPT_CREATE_LEADING),
         target_dir,
+        no_target_dir,
     })
 }
 
@@ -522,6 +529,9 @@ fn standard(mut paths: Vec<String>, b: &Behavior) -> UResult<()> {
     if paths.is_empty() {
         return Err(UUsageError::new(1, "missing file operand"));
     }
+    if b.no_target_dir && paths.len() > 2 {
+        return Err(InstallError::ExtraOperand(paths[2].clone(), format_usage(USAGE)).into());
+    }
 
     // get the target from either "-t foo" param or from the last given paths argument
     let target: PathBuf = if let Some(path) = &b.target_dir {
@@ -591,7 +601,7 @@ fn standard(mut paths: Vec<String>, b: &Behavior) -> UResult<()> {
         }
     }
 
-    if sources.len() > 1 || is_potential_directory_path(&target) {
+    if sources.len() > 1 {
         copy_files_into_dir(sources, &target, b)
     } else {
         let source = sources.first().unwrap();
@@ -600,6 +610,16 @@ fn standard(mut paths: Vec<String>, b: &Behavior) -> UResult<()> {
             return Err(InstallError::OmittingDirectory(source.clone()).into());
         }
 
+        if b.no_target_dir && target.exists() {
+            return Err(
+                InstallError::OverrideDirectoryFailed(target.clone(), source.clone()).into(),
+            );
+        }
+
+        if is_potential_directory_path(&target) {
+            return copy_files_into_dir(sources, &target, b);
+        }
+
         if target.is_file() || is_new_file_path(&target) {
             copy(source, &target, b)
         } else {

tests/by-util/test_install.rs

@@ -1808,3 +1808,159 @@ fn test_install_symlink_same_file() {
             "'{target_dir}/{file}' and '{target_link}/{file}' are the same file"
         ));
 }
+
+#[test]
+fn test_install_no_target_directory_failing_cannot_overwrite() {
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+    let file = "file";
+    let dir = "dir";
+
+    at.touch(file);
+    at.mkdir(dir);
+    scene
+        .ucmd()
+        .arg("-T")
+        .arg(file)
+        .arg(dir)
+        .fails()
+        .stderr_contains("cannot overwrite directory 'dir' with non-directory");
+
+    assert!(!at.dir_exists("dir/file"));
+}
+
+#[test]
+fn test_install_no_target_directory_failing_omitting_directory() {
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+    let dir1 = "dir1";
+    let dir2 = "dir2";
+
+    at.mkdir(dir1);
+    at.mkdir(dir2);
+    scene
+        .ucmd()
+        .arg("-T")
+        .arg(dir1)
+        .arg(dir2)
+        .fails()
+        .stderr_contains("omitting directory 'dir1'");
+}
+
+#[test]
+fn test_install_no_target_directory_creating_leading_dirs_with_single_source_and_target_dir() {
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+
+    let source1 = "file";
+    let target_dir = "missing_target_dir/";
+
+    at.touch(source1);
+
+    // installing a single file into a missing directory will fail, when -D is used w/o -t parameter
+    scene
+        .ucmd()
+        .arg("-TD")
+        .arg(source1)
+        .arg(at.plus(target_dir))
+        .fails()
+        .stderr_contains("missing_target_dir/' is not a directory");
+
+    assert!(!at.dir_exists(target_dir));
+}
+
+#[test]
+fn test_install_no_target_directory_failing_combine_with_target_directory() {
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+    let file = "file";
+    let dir1 = "dir1";
+
+    at.touch(file);
+    at.mkdir(dir1);
+    scene
+        .ucmd()
+        .arg("-T")
+        .arg(file)
+        .arg("-t")
+        .arg(dir1)
+        .fails()
+        .stderr_contains(
+            "Options --target-directory and --no-target-directory are mutually exclusive",
+        );
+}
+
+#[test]
+fn test_install_no_target_directory_failing_usage_with_target_directory() {
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+    let file = "file";
+
+    at.touch(file);
+    scene
+        .ucmd()
+        .arg("-T")
+        .arg(file)
+        .arg("-t")
+        .fails()
+        .stderr_contains(
+            "a value is required for '--target-directory <DIRECTORY>' but none was supplied",
+        )
+        .stderr_contains("For more information, try '--help'");
+}
+
+#[test]
+fn test_install_no_target_multiple_sources_and_target_dir() {
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+
+    let file1 = "file1";
+    let file2 = "file2";
+    let dir1 = "dir1";
+    let dir2 = "dir2";
+
+    at.touch(file1);
+    at.touch(file2);
+    at.mkdir(dir1);
+    at.mkdir(dir2);
+
+    // installing multiple files into a missing directory will fail, when -D is used w/o -t parameter
+    scene
+        .ucmd()
+        .arg("-T")
+        .arg(file1)
+        .arg(file2)
+        .arg(dir1)
+        .fails()
+        .stderr_contains("extra operand 'dir1'")
+        .stderr_contains("[OPTION]... [FILE]...");
+
+    scene
+        .ucmd()
+        .arg("-T")
+        .arg(file1)
+        .arg(file2)
+        .arg(dir1)
+        .arg(dir2)
+        .fails()
+        .stderr_contains("extra operand 'dir1'")
+        .stderr_contains("[OPTION]... [FILE]...");
+}
+
+#[test]
+fn test_install_no_target_basic() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let file = "file";
+    let dir = "dir";
+
+    at.touch(file);
+    at.mkdir(dir);
+    ucmd.arg("-T")
+        .arg(file)
+        .arg(format!("{dir}/{file}"))
+        .succeeds()
+        .no_stderr();
+
+    assert!(at.file_exists(file));
+    assert!(at.file_exists(format!("{dir}/{file}")));
+}