Implement -nt

src/elements/expr/conditional.rs

@@ -203,7 +203,7 @@ impl ConditionalExpr {
             Err(e) => return Err(e),
         };
 
-        let result = file_check::metadata_comp(&right, &left, op);
+        let result = file_check::metadata_comp(&left, &right, op);
         stack.push( Elem::Ans(result) );
         Ok(())
     }

src/utils/file_check.rs

@@ -34,12 +34,17 @@ pub fn metadata_comp(left: &str, right: &str, tp: &str) -> bool {
     };
     let right_meta = match fs::metadata(right) {
         Ok(m) => m,
-        _     => return false,
+        _     => return tp == "-nt",
     };
 
     match tp {
         "-ef" => (left_meta.dev(), left_meta.ino())
                  == (right_meta.dev(), right_meta.ino()),
+        "-nt" => {
+            let left_modified = left_meta.modified().unwrap();
+            let right_modified = right_meta.modified().unwrap();
+            left_modified > right_modified
+        },
         _     => false,
     }
 }

test/error

@@ -0,0 +1,7 @@
+../../../test/test_compound.bash
+../../../test/test_compound.bash
+../../../test/test_compound.bash
+../../../test/test_compound.bash
+../../../test/test_compound.bash
+../../../test/test_compound.bash
+../../../test/test_compound.bash

test/ok

@@ -12,3 +12,11 @@
 ../../../test/test_compound.bash
 ../../../test/test_compound.bash
 ../../../test/test_compound.bash
+../../../test/test_compound.bash
+../../../test/test_compound.bash
+../../../test/test_compound.bash
+../../../test/test_compound.bash
+../../../test/test_compound.bash
+../../../test/test_compound.bash
+../../../test/test_compound.bash
+../../../test/test_compound.bash

test/test_compound.bash

@@ -727,18 +727,41 @@ rm -f /tmp/$$*
 
 res=$($com -c 'touch /tmp/$$ ; ln /tmp/$$ /tmp/$$x; [[ /tmp/$$ -ef /tmp/$$x ]]')
 [ "$?" = "0" ] || err $LINENO
+rm -f /tmp/$$*
 
 res=$($com -c 'touch /tmp/$$ ; touch /tmp/$$x; [[ /tmp/$$ -ef /tmp/$$x ]]')
 [ "$?" = "1" ] || err $LINENO
+rm -f /tmp/$$*
 
 res=$($com -c 'touch /tmp/$$ ; touch /tmp/$$x; [[ ! /tmp/$$ -ef /tmp/$$x ]]')
 [ "$?" = "0" ] || err $LINENO
+rm -f /tmp/$$*
 
 res=$($com -c 'touch /tmp/$$ ; touch /tmp/$$x; [[ ! ( /tmp/$$ -ef /tmp/$$x ) ]]')
 [ "$?" = "0" ] || err $LINENO
+rm -f /tmp/$$*
 
+res=$($com -c '[[ /etc/passwd -ef /tmp/aaaaa ]]')
+[ "$?" = "1" ] || err $LINENO
+
+res=$($com -c '[[ /etc/aaaaaa -ef /etc/passwd ]]')
+[ "$?" = "1" ] || err $LINENO
+
+res=$($com -c 'touch /tmp/$$ ; touch /tmp/$$x; [[ /tmp/$$x -nt /tmp/$$ ]]')
+[ "$?" = "0" ] || err $LINENO
 rm -f /tmp/$$*
 
+res=$($com -c 'touch /tmp/$$ ; touch /tmp/$$x; [[ /tmp/$$ -nt /tmp/$$x ]]')
+[ "$?" = "1" ] || err $LINENO
+rm -f /tmp/$$*
+
+res=$($com -c 'touch /tmp/$$ ; [[ /tmp/$$ -nt /tmp/$$ ]]')
+[ "$?" = "1" ] || err $LINENO
+rm -f /tmp/$$*
+
+res=$($com -c '[[ /etc/passwd -nt /tmp/aaaaaaaaa ]]')
+[ "$?" = "0" ] || err $LINENO
+
 # and or 
 
 res=$($com -c '[[ -a /etc/passwd && -a /etc/passwd ]]')