[modules] Add support for disk utilization

Add a new module "disk" that takes an optional parameter (the path) and
displays free & total disk space, along with the usage percentage.

Also, added Tunnel/VPN support to the themeing of the "net" module.

bumblebee/modules/disk.py

@@ -0,0 +1,25 @@
+import os
+import bumblebee.util
+import bumblebee.module
+
+class Module(bumblebee.module.Module):
+    def __init__(self, args):
+        super(Module, self).__init__(args)
+        self._path = args[0] if args else "/"
+
+    def data(self):
+        st = os.statvfs(self._path)
+
+        self._size = st.f_frsize*st.f_blocks
+        self._free = st.f_frsize*st.f_bavail
+        self._perc = 100.0*self._free/self._size
+
+        return "{} {}/{} ({:05.02f}%)".format(self._path, bumblebee.util.bytefmt(self._free), bumblebee.util.bytefmt(self._size), self._perc)
+
+    def warning(self):
+        return self._perc < 20
+
+    def critical(self):
+        return self._perc < 10
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4

bumblebee/modules/memory.py

@@ -1,12 +1,6 @@
-import bumblebee.module
 import psutil
-
-def fmt(num, suffix='B'):
-    for unit in [ "", "Ki", "Mi", "Gi" ]:
-        if num < 1024.0:
-            return "{:.2f}{}{}".format(num, unit, suffix)
-        num /= 1024.0
-    return "{:05.2f%}{}{}".format(num, "Gi", suffix)
+import bumblebee.module
+import bumblebee.util
 
 class Module(bumblebee.module.Module):
     def __init__(self, args):
@@ -19,7 +13,7 @@ class Module(bumblebee.module.Module):
         free = self._mem.available
         total = self._mem.total
 
-        return "{}/{} ({:05.02f}%)".format(fmt(self._mem.available), fmt(self._mem.total), 100.0 - self._mem.percent)
+        return "{}/{} ({:05.02f}%)".format(bumblebee.util.bytefmt(self._mem.available), bumblebee.util.bytefmt(self._mem.total), 100.0 - self._mem.percent)
 
     def warning(self):
         return self._mem.percent < 20

bumblebee/modules/nic.py

@@ -19,11 +19,15 @@ class Module(bumblebee.module.Module):
         self._state = "down"
         addr = []
 
+        try:
             if netifaces.AF_INET in netifaces.ifaddresses(self._intf):
                 for ip in netifaces.ifaddresses(self._intf)[netifaces.AF_INET]:
                     if "addr" in ip and ip["addr"] != "":
                         addr.append(ip["addr"])
                         self._state = "up"
+        except Exception as e:
+            self._state = "down"
+            addr = []
 
         return "{} {} {}".format(self._intf, self._state, ", ".join(addr))
 
@@ -48,9 +52,14 @@ class Module(bumblebee.module.Module):
                 self._cache["wlan{}".format(intf)] = False
         return self._cache["wlan{}".format(intf)]
 
+    def _istunnel(self, intf):
+        return intf.startswith("tun")
+
     def state(self):
         t = "wireless" if self._iswlan(self._intf) else "wired"
 
+        t = "tunnel" if self._istunnel(self._intf) else t
+
         return "{}-{}".format(t, self._state)
 
     def warning(self):

bumblebee/themes/solarized-powerline.json

@@ -32,6 +32,9 @@
 	"cpu": {
 		"prefix": "  "
 	},
+	"disk": {
+		"prefix": "  "
+	},
 	"nic": {
 		"states": {
 			"wireless-up": {
@@ -45,6 +48,12 @@
 			},
 			"wired-down": {
 				"prefix": "  "
+			},
+			"tunnel-up": {
+				"prefix": "  "
+			},
+			"tunnel-down": {
+				"prefix": "  "
 			}
 		}
 	},

bumblebee/util.py

@@ -0,0 +1,8 @@
+
+def bytefmt(num):
+    for unit in [ "", "Ki", "Mi", "Gi" ]:
+        if num < 1024.0:
+            return "{:.2f}{}B".format(num, unit)
+        num /= 1024.0
+    return "{:05.2f%}{}GiB".format(num)
+