Add date support (#156)

crates/shell/Cargo.toml

@@ -33,7 +33,8 @@ uu_ls = "0.0.27"
 dirs = "5.0.1"
 which = "6.0.3"
 uu_uname = "0.0.27"
+uu_date = "0.0.27"
 
 [package.metadata.release]
 # Dont publish the binary
-release = false
+release = false

crates/shell/src/commands/date.rs

@@ -0,0 +1,31 @@
+use std::ffi::OsString;
+
+use deno_task_shell::{ExecuteResult, ShellCommand, ShellCommandContext};
+use futures::future::LocalBoxFuture;
+use uu_date::uumain as uu_date;
+
+pub struct DateCommand;
+
+impl ShellCommand for DateCommand {
+    fn execute(&self, mut context: ShellCommandContext) -> LocalBoxFuture<'static, ExecuteResult> {
+        Box::pin(futures::future::ready(match execute_date(&mut context) {
+            Ok(_) => ExecuteResult::from_exit_code(0),
+            Err(exit_code) => ExecuteResult::from_exit_code(exit_code),
+        }))
+    }
+}
+
+fn execute_date(context: &mut ShellCommandContext) -> Result<(), i32> {
+    let mut args: Vec<OsString> = vec![OsString::from("date")];
+
+    context
+        .args
+        .iter()
+        .for_each(|arg| args.push(OsString::from(arg)));
+
+    let exit_code = uu_date(args.into_iter());
+    if exit_code != 0 {
+        return Err(exit_code);
+    }
+    Ok(())
+}

crates/shell/src/commands/mod.rs

@@ -7,9 +7,11 @@ use uu_ls::uumain as uu_ls;
 
 use crate::execute;
 
+pub mod date;
 pub mod uname;
 pub mod which;
 
+pub use date::DateCommand;
 pub use uname::UnameCommand;
 pub use which::WhichCommand;
 
@@ -44,6 +46,10 @@ pub fn get_commands() -> HashMap<String, Rc<dyn ShellCommand>> {
             "uname".to_string(),
             Rc::new(UnameCommand) as Rc<dyn ShellCommand>,
         ),
+        (
+            "date".to_string(),
+            Rc::new(DateCommand) as Rc<dyn ShellCommand>,
+        ),
     ])
 }
 

crates/tests/src/lib.rs

@@ -870,6 +870,23 @@ async fn arithmetic() {
         .await;
 }
 
+#[tokio::test]
+async fn date() {
+    TestBuilder::new()
+        .command("date")
+        .assert_exit_code(0)
+        .check_stdout(false)
+        .run()
+        .await;
+
+    TestBuilder::new()
+        .command("date +%Y-%m-%d")
+        .assert_exit_code(0)
+        .check_stdout(false)
+        .run()
+        .await;
+}
+
 #[cfg(test)]
 fn no_such_file_error_text() -> &'static str {
     if cfg!(windows) {