date: add support for dot-separated dates

src/uu/date/src/date.rs

@@ -35,10 +35,10 @@
 
 /// OHOS helper: pass through the system time zone ID returned by
 /// TimeService (OH_TimeService_GetTimeZone, e.g. "Asia/Shanghai") and
 /// resolve it against the embedded IANA tzdata (jiff-tzdb) so that
 /// historial DST rules and transitions are preserved. jiff's
 /// `try_system()` is useless on OHOS because both `/etc/localtime` and
 /// the zoneinfo dirs are absent.
 #[cfg(target_env = "ohos")]
 fn ohos_system_zone() -> jiff::tz::TimeZone {
     use core::ffi::{CStr, c_char};
@@ -55,7 +55,7 @@
     let id = unsafe { CStr::from_ptr(buf.as_ptr() as *const c_char) }
         .to_string_lossy()
         .into_owned();
     if let Some((name, tzif)) = jiff_tzdb::get(&id) {
         if let Ok(tz) = jiff::tz::TimeZone::tzif(name, tzif) {
             return tz;
         }
@@ -1176,6 +1176,32 @@
     }))
 }
 
+/// Convert a date string to iso if it is seperated by dots.
+fn convert_to_iso(date_str: &str) -> Option<String> {
+    // Seperate the date from anything else, in case we have something like "01.01.2008 03:00 p.m."
+    let mut parts = date_str.splitn(2, ' ');
+    let date_part = parts.next()?;
+    let time_part = parts.next();
+
+    // Get the year, month and the day
+    let date_subparts: Vec<&str> = date_part.split('.').collect();
+    if date_subparts.len() != 3 {
+        return None;
+    }
+
+    // Format in iso style
+    let new_date = format!(
+        "{}-{}-{}",
+        date_subparts[2], date_subparts[1], date_subparts[0]
+    );
+
+    // Concat the date and the time back
+    match time_part {
+        Some(time) => Some(format!("{new_date} {time}")),
+        None => Some(new_date),
+    }
+}
+
 /// Parse a string into either an in-range [`Zoned`] value or an extended date.
 fn parse_date<S: AsRef<str>>(
     s: S,
@@ -1209,7 +1235,9 @@
         return Ok(ParsedDateTime::InRange(zoned));
     }
 
-    match parse_datetime::parse_datetime_at_date(now.clone(), input_str) {
+    let input_str = convert_to_iso(input_str).unwrap_or(input_str.to_string());
+
+    match parse_datetime::parse_datetime_at_date(now.clone(), &input_str) {
         // Convert to system timezone for display
         // (parse_datetime returns a value in the input's timezone)
         Ok(ParsedDateTime::InRange(date)) => {
@@ -1248,11 +1276,10 @@
             Ok(ParsedDateTime::InRange(result))
         }
         Ok(ParsedDateTime::Extended(date)) if allow_extended => Ok(ParsedDateTime::Extended(date)),
-        Ok(ParsedDateTime::Extended(_)) => Err((
-            input_str.into(),
-            parse_datetime::ParseDateTimeError::InvalidInput,
-        )),
-        Err(e) => Err((input_str.into(), e)),
+        Ok(ParsedDateTime::Extended(_)) => {
+            Err((input_str, parse_datetime::ParseDateTimeError::InvalidInput))
+        }
+        Err(e) => Err((input_str, e)),
     }
 }
 

tests/by-util/test_date.rs

@@ -3297,3 +3297,8 @@ fn test_write_error() {
         .fails_with_code(1)
         .stderr_is("date: write error: No space left on device\n");
 }
+
+#[test]
+fn test_date_separated_by_dots() {
+    new_ucmd!().args(&["-d", "15.06.2004 3:00 a.m."]).succeeds();
+}