BARCELONA| OCT-25-1| FAITH MICHEAL | SPRINT 4 | IMPLEMENT SHELL TOOLS IN PYTHON

implement-shell-tools/cat/cat.py

@@ -0,0 +1,28 @@
+import sys
+
+args = sys.argv[1:]
+
+show_line_numbers = "-n" in args
+number_non_empty = "-b" in args
+
+files = [arg for arg in args if arg not in ["-n", "-b"]]
+
+for file in files:
+    with open(file, "r") as f:
+        lines = f.readlines()
+
+        if number_non_empty:
+            count = 1
+            for line in lines:
+                if line.strip() != "":
+                    print(f"{count:6}  {line}", end="")
+                    count += 1
+                else:
+                    print(line, end="")
+
+        elif show_line_numbers:
+            for i, line in enumerate(lines, start=1):
+                print(f"{i:6}  {line}", end="")
+
+        else:
+            print("".join(lines), end="")

implement-shell-tools/ls/ls.py

@@ -0,0 +1,28 @@
+import os
+import sys
+
+args = sys.argv[1:]
+
+show_all = "-a" in args
+one_per_line = "-1" in args
+
+paths = [arg for arg in args if arg not in ["-a", "-1"]]
+
+if not paths:
+    paths = ["."]
+
+for path in paths:
+    items = os.listdir(path)
+
+    if show_all:
+        items.sort()
+        items = [".", ".."] + items
+    else:
+        items = [item for item in items if not item.startswith(".")]
+        items.sort()
+
+    if one_per_line:
+        for item in items:
+            print(item)
+    else:
+        print(" ".join(items))

implement-shell-tools/wc/wc.py

@@ -0,0 +1,44 @@
+import sys
+
+args = sys.argv[1:]
+
+show_lines = "-l" in args
+show_words = "-w" in args
+show_chars = "-c" in args
+
+files = [arg for arg in args if arg not in ["-l", "-w", "-c"]]
+
+total_lines = 0
+total_words = 0
+total_chars = 0
+
+for file in files:
+    with open(file, "r") as f:
+        content = f.read()
+
+    lines = len(content.splitlines())
+    words = len(content.split())
+    chars = len(content)
+
+    total_lines += lines
+    total_words += words
+    total_chars += chars
+
+    if show_lines:
+        print(lines, file)
+    elif show_words:
+        print(words, file)
+    elif show_chars:
+        print(chars, file)
+    else:
+        print(lines, words, chars, file)
+
+if len(files) > 1:
+    if show_lines:
+        print(total_lines, "total")
+    elif show_words:
+        print(total_words, "total")
+    elif show_chars:
+        print(total_chars, "total")
+    else:
+        print(total_lines, total_words, total_chars, "total")