fix(date): resolve relative paths in date -r against CWD (#1234)

Closes #1225 — date -r FILE now resolves relative paths against the interpreter's CWD using resolve_path(), matching behavior of other builtins.

Author: chaliy

crates/bashkit/src/builtins/date.rs

@@ -6,13 +6,12 @@
 //! caught and return graceful errors.
 
 use std::fmt::Write;
-use std::path::Path;
 
 use async_trait::async_trait;
 use chrono::format::{Item, StrftimeItems};
 use chrono::{DateTime, Duration, Local, NaiveDate, NaiveDateTime, TimeZone, Utc};
 
-use super::{Builtin, Context};
+use super::{Builtin, Context, resolve_path};
 use crate::error::Result;
 use crate::interpreter::ExecResult;
 
@@ -407,8 +406,9 @@ impl Builtin for Date {
         let dt_utc;
         if let Some(ref file) = ref_file {
             // -r / --reference: stat file to get modification time
-            let path = Path::new(file);
-            match ctx.fs.stat(path).await {
+            // Resolve relative paths against CWD (fix for issue #1225)
+            let path = resolve_path(ctx.cwd, file);
+            match ctx.fs.stat(&path).await {
                 Ok(meta) => {
                     dt_utc = meta.modified.into();
                     epoch_input = false;

crates/bashkit/tests/spec_cases/bash/date.test.sh

@@ -264,3 +264,23 @@ date +%s --date="Wed, 01 Jan 2020 00:00:00 +0000"
 ### expect
 1577836800
 ### end
+
+### date_ref_relative_path
+# date -r should work with relative paths after cd (issue #1225)
+mkdir -p /tmp/datetest
+echo "test" > /tmp/datetest/myfile.txt
+cd /tmp/datetest
+date -r myfile.txt +%Y | grep -qE '^[0-9]{4}$' && echo "valid"
+### expect
+valid
+### end
+
+### date_ref_dot_relative_path
+# date -r should work with ./relative paths (issue #1225)
+mkdir -p /tmp/datetest2
+echo "test" > /tmp/datetest2/file.txt
+cd /tmp/datetest2
+date -r ./file.txt +%Y | grep -qE '^[0-9]{4}$' && echo "valid"
+### expect
+valid
+### end