devout: add device

pkgs/devout/test.fnl

@@ -1,11 +1,23 @@
+(local { : view } (require :fennel))
 (import-macros { : expect= } :anoia.assert)
 
+(fn parse-uevent [s]
+  (let [(nl nxt) (string.find s "\0" 1 true)]
+    (doto
+        (collect [k v (string.gmatch
+                       (string.sub s (+ 1 nxt))
+                       "(%g-)=(%g+)")]
+          (k:lower) v)
+      (tset :path (string.sub s 1 (- nl 1))))))
 
 (fn database []
-  {
-   :find (fn [terms] [])
-   })
-
+  (let [db {}]
+    {
+     :find (fn [_ terms] [(.  db (next db))])
+     :add (fn [_ event-string]
+            (let [e (parse-uevent event-string)]
+              (tset db e.path e)))
+     }))
 
 (macro example [description & body]
   `(do ,body))
@@ -15,6 +27,23 @@
  (let [db (database)]
    (expect= (db:find {:partname "boot"}) [])))
 
+(example
+ "when I add a device, I can find it"
+ (let [db (database)]
+   (db:add "add@/devices/pci0000:00/0000:00:13.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/block/sda\0ACTION=add
+DEVPATH=/devices/pci0000:00/0000:00:13.0/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/block/sda
+SUBSYSTEM=block
+MAJOR=8
+MINOR=0
+DEVNAME=sda
+DEVTYPE=disk
+DISKSEQ=2
+SEQNUM=1527")
+   (let [[m & more] (db:find {:devname "boot"})]
+     (expect= m.devname "sda")
+     (expect= m.major "8")
+     (expect= more []))))
+
 
 
 (print "OK")