Implement REPL commands and remove F1 for help (curses shows that scrambled)

Author: pablogsal

Lib/_pyrepl/commands.py

@@ -396,12 +396,6 @@ def do(self):
         pass
 
 
-class help(Command):
-    def do(self):
-        self.reader.msg = self.reader.help_text
-        self.reader.dirty = 1
-
-
 class invalid_key(Command):
     def do(self):
         pending = self.reader.console.getpending()

Lib/_pyrepl/reader.py

@@ -160,7 +160,6 @@ def make_default_syntax_table():
         (r"\M-\<backspace>", "backward-kill-word"),
         (r"\<end>", "end-of-line"),  # was 'end'
         (r"\<home>", "beginning-of-line"),  # was 'home'
-        (r"\<f1>", "help"),
         (r"\EOF", "end"),  # the entries in the terminfo database for xterms
         (r"\EOH", "home"),  # seem to be wrong.  this is a less than ideal
         # workaround

Lib/_pyrepl/simple_interact.py

@@ -23,6 +23,7 @@
 allowing multiline input and multiline history entries.
 """
 
+import _sitebuiltins
 import linecache
 import sys
 
@@ -48,6 +49,14 @@ def _strip_final_indent(text):
     return text
 
 
+REPL_COMMANDS = {
+    "exit": _sitebuiltins.Quitter('exit', ''),
+    "quit": _sitebuiltins.Quitter('quit' ,''),
+    "copyright": _sitebuiltins._Printer('copyright', sys.copyright),
+    "help": _sitebuiltins._Helper(),
+}
+
+
 def run_multiline_interactive_console(mainmodule=None, future_flags=0):
     import code
     import __main__
@@ -81,11 +90,17 @@ def more_lines(unicodetext):
                 statement = multiline_input(more_lines, ps1, ps2, returns_unicode=True)
             except EOFError:
                 break
+
             input_name = f"<python-input-{input_n}>"
             linecache._register_code(input_name, statement, "<stdin>")
-            more = console.push(_strip_final_indent(statement), filename=input_name)
+            maybe_repl_command = REPL_COMMANDS.get(statement.strip())
+            if maybe_repl_command is not None:
+                maybe_repl_command()
+                continue
+            else:
+                more = console.push(_strip_final_indent(statement), filename=input_name)
+                assert not more
             input_n += 1
-            assert not more
         except KeyboardInterrupt:
             console.write("\nKeyboardInterrupt\n")
             console.resetbuffer()