feat: implement ls with -a and -1 flags.

Author: jamallaqdiem

implement-shell-tools/ls/ls.py

@@ -0,0 +1,45 @@
+import os
+import sys
+
+# assign flags
+show_all = "-a" in sys.argv
+one_column = "-1" in sys.argv
+
+# Argument Filtering 
+args = [arg for arg in sys.argv[1:] if not arg.startswith("-")]
+# if no path given we use the current path
+path = args[0] if args else "."
+
+try:
+    # Get directory contents
+    entries = os.listdir(path)
+
+    # Handle the -a flag 
+    if show_all:
+        entries.extend([".", ".."])
+    
+    # 5. Sort alphabetically, should used in ls.js as well
+    entries.sort()
+
+    # Printing Logic
+    for entry in entries:
+        # Skip hidden files unless -a is passed
+        if not show_all and entry.startswith("."):
+            continue
+            
+        if one_column:
+            # -1 flag: Print vertically
+            print(entry)
+        else:
+            # Standard: Print horizontally with spaces
+            print(entry, end="  ")
+
+    #  newline only if we not print horizontally
+    if not one_column:
+        print()
+
+except FileNotFoundError:
+    print(f"ls: cannot access '{path}': No such file or directory")
+except NotADirectoryError:
+    # if a file  ls just prints the filename
+    print(path)