Micropython/upysh: Improve UX and making functions private

Micropython/upysh: Improve UX by allowing calling commands interactively;
make internal classes and functions not importable (put _ before their names).

interactively means you don't have to type tons of brackets and quotes
(something alike what you expect from a normal shell),
to figure out this behavior just type cd or mv

micropython/upysh/upysh.py

@@ -2,7 +2,7 @@ import sys
 import os
 
 
-class LS:
+class _Ls:
     def __repr__(self):
         self.__call__()
         return ""
@@ -26,7 +26,7 @@ class LS:
             pass
 
 
-class PWD:
+class _Pwd:
     def __repr__(self):
         return os.getcwd()
 
@@ -34,7 +34,7 @@ class PWD:
         return self.__repr__()
 
 
-class CLEAR:
+class _Clear:
     def __repr__(self):
         return "\x1b[2J\x1b[H"
 
@@ -42,7 +42,34 @@ class CLEAR:
         return self.__repr__()
 
 
-def head(f, n=10):
+class _StdinCommand:
+    def __init__(self, command, args):
+        self.command = command
+        self.args = args.copy()
+
+    def __repr__(self):
+        cur_args = []
+        for prompt, parser, default in self.args:
+            arg = input(prompt + ": ")
+            if arg == "":
+                if default is not None:
+                    arg = default
+                else:
+                    print(f"You must provide {prompt.lower()}")
+                    return ""
+            else:
+                arg = parser(arg)
+
+            cur_args.append(arg)
+
+        self.command(*cur_args)
+        return ""
+
+    def __call__(self, *args):
+        self.command(*args)
+
+
+def _head_func(f, n=10):
     with open(f) as f:
         for i in range(n):
             l = f.readline()
@@ -51,11 +78,11 @@ def head(f, n=10):
             sys.stdout.write(l)
 
 
-def cat(f):
+def _cat_func(f):
     head(f, 1 << 30)
 
 
-def cp(s, t):
+def _cp_func(s, t):
     try:
         if os.stat(t)[0] & 0x4000:  # is directory
             t = t.rstrip("/") + "/" + s
@@ -71,7 +98,7 @@ def cp(s, t):
             t.write(buf_mv[:n])
 
 
-def newfile(path):
+def _newfile_func(path):
     print("Type file contents line by line, finish with EOF (Ctrl+D).")
     with open(path, "w") as f:
         while 1:
@@ -83,12 +110,12 @@ def newfile(path):
             f.write("\n")
 
 
-def rm(d, recursive=False):  # Remove file or tree
+def _rm_func(d, recursive=False):  # Remove file or tree
     try:
         if (os.stat(d)[0] & 0x4000) and recursive:  # Dir
             for f in os.ilistdir(d):
                 if f[0] != "." and f[0] != "..":
-                    rm("/".join((d, f[0])))  # File or Dir
+                    rm("/".join((d, f[0])), True)  # File or Dir
             os.rmdir(d)
         else:  # File
             os.remove(d)
@@ -96,7 +123,7 @@ def rm(d, recursive=False):  # Remove file or tree
         print("rm of '%s' failed" % d)
 
 
-class Man:
+class _Man:
     def __repr__(self):
         return """
 upysh is intended to be imported using:
@@ -105,20 +132,42 @@ from upysh import *
 To see this help text again, type "man".
 
 upysh commands:
-clear, ls, ls(...), head(...), cat(...), newfile(...)
-cp('src', 'dest'), mv('old', 'new'), rm(...)
-pwd, cd(...), mkdir(...), rmdir(...)
+clear, ls, ls(...), head(...)*, cat(...)*, newfile(...)*
+cp('src', 'dest')*, mv('old', 'new')*, rm(...)*
+pwd, cd(...)*, mkdir(...)*, rmdir(...)*
+
+Most commands (marked with *) can be called interactively.
+It means you don't have to type tons of brackets and quotes
+(something alike what you expect from a normal shell),
+to figure out this behavior just type cd or mv
 """
 
 
-man = Man()
-pwd = PWD()
-ls = LS()
-clear = CLEAR()
+man = _Man()
+pwd = _Pwd()
+ls = _Ls()
+clear = _Clear()
 
-cd = os.chdir
-mkdir = os.mkdir
-mv = os.rename
-rmdir = os.rmdir
+head = _StdinCommand(
+    _head_func, [["Filename", str, None], ["Num of lines (default=10)", int, 10]]
+)
+
+cat = _StdinCommand(_cat_func, [["Filename", str, None]])
+
+cp = _StdinCommand(_cp_func, [["Source", str, None], ["Target", str, None]])
+
+newfile = _StdinCommand(_newfile_func, [["Filename", str, None]])
+
+rm = _StdinCommand(
+    _rm_func, [["Filename", str, None], ["Recursive (default=False)", bool, False]]
+)
+
+cd = _StdinCommand(os.chdir, [["Target", str, None]])
+
+mkdir = _StdinCommand(os.mkdir, [["Directory name", str, None]])
+
+mv = _StdinCommand(os.rename, [["Source", str, None], ["Target", str, None]])
+
+rmdir = _StdinCommand(os.rmdir, [["Directory name", str, None]])
 
 print(man)