Gracefully degrade under load, fixes #2

libexec/render.py

@@ -268,14 +268,15 @@ class PathPart(Part):
 	"""
 	/path/to/cwd
 	
-	Contructs a list of Dirs from the root to CWD. When fit is called, some Dirs may be shortened.
+	Contructs a list of Dirs from the root to CWD. When shrink_fit is called, some Dirs may be shortened.
 	"""
-	def __init__(self, settings):
+	
+	def __init__(self, settings, overloaded):
 		Part.__init__(self)
 		self.term_width = settings.term_width
 		self.dirs = []
 		
-		homes = dict(list_homes())
+		homes = {} if overloaded else dict(list_homes())
 		dirs = settings.cwd.split("/")[1:]
 		path = ""
 		
@@ -490,6 +491,14 @@ class StatsPart(Part):
 		# tasks
 		self.fragments.append("%d " %(sysload.tasks_total))
 		
+		if sysload.load1 >= settings.load_error:
+			self.fragments.append(" | ")
+			self.fragments.append(style_color(COLOR_ERROR))
+			self.fragments.append(style_bold())
+			self.fragments.append("⚠ OVERLOAD ⚠ ")
+			self.fragments.append(style_reset())
+		
+		else:
 			# memory (and swap, if used)
 			mem_total = 0
 			mem_free = 0
@@ -514,7 +523,7 @@ class StatsPart(Part):
 			if old_linux:
 				self.fragments.append(style_color(COLOR_ERROR))
 				self.fragments.append(style_bold())
-			self.fragments.append("❌ <linux-3.14 ❌")
+				self.fragments.append("⚠ <linux-3.14 ⚠")
 			else:
 				self.fragments.append(style_color(COLOR_MEMSWAP))
 				self.fragments.append("m")
@@ -606,10 +615,11 @@ class StatsPart(Part):
 if __name__ == "__main__":
 	settings = Settings(sys.argv)
 	sysload = Sysload()
+	overloaded = sysload.load1 >= settings.load_error
 	
 	lp = LoginPart(settings, sysload)
-	pp = PathPart(settings)
+	pp = PathPart(settings, overloaded)
-	gp = GitPart()
+	gp = "" if overloaded else GitPart()
 	vp = VirtualEnvPart()
 	wp = WineprefixPart()
 	pad = Padding(settings.term_width)