1 files changed, 93 insertions, 0 deletions
diff --git a/roverlay/ebuild/abstractcomponents.py b/roverlay/ebuild/abstractcomponents.py
new file mode 100644
index 0000000..73dac03
--- /dev/null
+++ b/roverlay/ebuild/abstractcomponents.py
@@ -0,0 +1,93 @@
+# R Overlay -- ebuild creation, <?>
+# Copyright 2006-2012 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+INDENT = '\t'
+
+def listlike ( ref ):
+	return hasattr ( ref, '__iter__' ) and not isinstance ( ref, str )
+
+
+class ListValue ( object ):
+	def __init__ ( self, value, indent_level=1, empty_value=None ):
+		self.set_level ( indent_level )
+
+		self.empty_value = empty_value
+
+
+		self.single_line             = False
+		self.indent_lines            = True
+		# only used in multi line mode
+		self.append_indented_newline = True
+
+		self.val_join = ' '
+
+		self.set_value ( value )
+
+
+	def __len__ ( self ):
+		l = len ( self.value )
+		return l if self.empty_value is None else l - 1
+
+	def set_level ( self, level ):
+		self.level      = level
+		self.var_indent = (level - 1) * INDENT
+		self.val_indent = level * INDENT
+		self.line_join  = '\n' + self.val_indent
+	# --- end of set_level (...) ---
+
+	def set_value ( self, value ):
+		self.value = list()
+		if self.empty_value is not None:
+			self.value.append ( self.empty_value )
+		self.add_value ( value )
+	# --- end of set_value (...) ---
+
+	def add_value ( self, value ):
+		if value is None:
+			pass
+		elif listlike ( value ):
+			self.value.extend ( value )
+		else:
+			self.value.append ( value )
+	# --- end of add_value (...) ---
+
+	add = add_value
+
+	def to_str ( self ):
+		if len ( self.value ) == 0:
+			ret = ""
+		elif len ( self.value ) == 1:
+			ret = str ( self.value [0] )
+		elif self.single_line:
+			ret = self.val_join.join ( self.value )
+		else:
+			ret = self.line_join.join ( ( self.value ) )
+			if self.append_indented_newline:
+				ret += self.var_indent + '\n'
+
+		return ret
+	# --- end of to_str (...) ---
+
+	__str__ = to_str
+
+
+class EbuildVar ( object ):
+
+	def __init__ ( self, name, value, priority ):
+		self.name     = name
+		self.priority = priority
+		self.value    = value
+		self.set_level ( 0 )
+
+	def set_level ( self, level ):
+		self.level  = level
+		self.indent = self.level * INDENT
+		if hasattr ( self.value, 'set_level' ):
+			self.value.set_level ( level + 1 )
+	# --- end of set_level (...) ---
+
+	def active ( self ): return True
+
+	def __str__ ( self ):
+		return '%s%s="%s"' % ( self.indent, self.name, self.value )