Have printing a menu node print the item

Handy and intuitive. Avoids having to go to .item all the time when
experimenting, and provides Kconfig output for menus and comments.

  >>> print c.top_node
  menu "Linux/$ARCH $KERNELVERSION Kernel Configuration"

  >>> print c.top_node.list
  config SRCARCH
  	string
  	option env="SRCARCH"
  	default "x86"

  >>> print c.top_node.list.next
  config 64BIT
  	bool
  	prompt "64-bit kernel" if ARCH = "x86"
  	default ARCH != "i386"
  	help
  	  Say yes to build a 64-bit kernel - formerly known as x86_64
  	  Say no to build a 32-bit kernel - formerly known as i386

Piggyback escaping when printing the prompt of symbols and choices. They
can contain " and \ as well.

1 files changed, 23 insertions, 1 deletions

diff --git a/kconfiglib.py b/kconfiglib.py
index 226ae9f..09d821f 100644
--- a/kconfiglib.py
+++ b/kconfiglib.py
@@ -3288,6 +3288,28 @@ class MenuNode(object):
 
         return "<{}>".format(", ".join(fields))
 
+    def __str__(self):
+        """
+        TODO
+        """
+        if isinstance(self.item, (Symbol, Choice)):
+            return self.item.__str__()
+
+        if self.item in (MENU, COMMENT):
+            s = ("menu" if self.item == MENU else "comment") + \
+                ' "{}"\n'.format(escape(self.prompt[0]))
+
+            if self.dep is not self.kconfig.y:
+                s += "\tdepends on {}\n".format(expr_str(self.dep))
+
+            if self.item == MENU and self.visibility is not self.kconfig.y:
+                s += "\tvisible if {}\n".format(expr_str(self.visibility))
+
+            return s
+
+        # 'if' node. Should never appear in the final tree.
+        return "if " + expr_str(self.dep)
+
 class KconfigSyntaxError(Exception):
     """
     Exception raised for syntax errors.
@@ -3560,7 +3582,7 @@ def _sym_choice_str(sc):
             indent_add(_TYPENAME[sc.orig_type])
 
         if node.prompt is not None:
-            prompt_str = 'prompt "{}"'.format(node.prompt[0])
+            prompt_str = 'prompt "{}"'.format(escape(node.prompt[0]))
             if node.prompt[1] is not sc.kconfig.y:
                 prompt_str += " if " + expr_str(node.prompt[1])
             indent_add(prompt_str)