date: forbid conflicting options

src/uu/date/src/date.rs

@@ -328,6 +328,8 @@ pub fn uu_app() -> Command {
  .long(OPT_DATE)
  .value_name("STRING")
  .overrides_with(OPT_DATE)
+ .conflicts_with(OPT_FILE)
+ .conflicts_with(OPT_REFERENCE)
  .help("display time described by STRING, not 'now'"),
  )
  .arg(
@@ -337,6 +339,7 @@ pub fn uu_app() -> Command {
  .value_name("DATEFILE")
  .value_hint(clap::ValueHint::FilePath)
  .overrides_with(OPT_FILE)
+ .conflicts_with(OPT_REFERENCE)
  .help("like --date; once for each line of DATEFILE"),
  )
  .arg(
@@ -349,13 +352,16 @@ pub fn uu_app() -> Command {
  ]))
  .num_args(0..=1)
  .default_missing_value(OPT_DATE)
+ .conflicts_with(OPT_RFC_EMAIL)
+ .conflicts_with(OPT_RFC_3339)
  .help(ISO_8601_HELP_STRING),
  )
  .arg(
  Arg::new(OPT_RFC_EMAIL)
  .short('R')
  .long(OPT_RFC_EMAIL)
  .help(RFC_5322_HELP_STRING)
+ .conflicts_with(OPT_RFC_3339)
  .action(ArgAction::SetTrue),
  )
  .arg(
@@ -387,6 +393,9 @@ pub fn uu_app() -> Command {
  .long(OPT_SET)
  .value_name("STRING")
  .overrides_with(OPT_SET)
+ .conflicts_with(OPT_DATE)
+ .conflicts_with(OPT_FILE)
+ .conflicts_with(OPT_REFERENCE)
  .help(OPT_SET_HELP_STRING),
  )
  .arg(

tests/by-util/test_date.rs

@@ -613,3 +613,27 @@ fn test_repeat_reference_older_last() {
  .stdout_only("2001-02-03\n")
  .no_stderr();
 }
+
+#[test]
+fn test_incompatible_args() {
+ for args in [
+ // Input with other input
+ vec!["-d", "now", "-f", "foo"],
+ vec!["-d", "now", "-r", "foo"],
+ vec!["-f", "foo", "-r", "foo"],
+ // Format with other format
+ vec!["-I", "-R"],
+ vec!["-I", "--rfc-3339=date"],
+ vec!["-R", "--rfc-3339=date"],
+ // Input with --set
+ vec!["-d", "now", "-s", "now"],
+ vec!["-r", "foo", "-s", "now"],
+ vec!["-f", "foo", "-s", "now"],
+ ] {
+ new_ucmd!()
+ .args(&args)
+ .fails()
+ .no_stdout()
+ .stderr_contains(" cannot be used with ");
+ }
+}