Add stale cleanup function (still WIP)

.gitignore

@@ -0,0 +1 @@
+build/

.vscode/tasks.json

@@ -0,0 +1,27 @@
+{
+    "version": "2.0.0",
+    "type": "shell",
+    "command": "go",
+    "options": {
+        "cwd": "${workspaceFolder}",
+    },
+    "presentation": {
+        "reveal": "never",
+        "revealProblems": "onProblem",
+    },
+    "tasks": [
+        {
+            "label": "Build Project",
+            "args": [
+                "build",
+                "-o",
+                "build/",
+                "./cmd/joyful",
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": true,
+            },
+        },
+    ],
+}

cmd/joyful/main.go

@@ -5,11 +5,20 @@ import (
 	"syscall"
 	"time"
 
+	"git.annabunches.net/annabunches/joyful/internal/virtualdevice"
 	"github.com/holoplot/go-evdev"
 )
 
 func main() {
+	// Check for and destroy any existing joyful devices
+	virtualdevice.CleanupStaleVirtualDevices()
+
+	// STUB: parse virtual device config
+
+	// STUB: parse mapping config
+
 	// Define virtual device
+	// TODO: create virtual devices from config
 	vDevice, err := evdev.CreateDevice(
 		"joyful-joystick",
 		evdev.InputID{
@@ -36,6 +45,12 @@ func main() {
 		fmt.Printf("Failed to create vDevice: %s", err.Error())
 	}
 
+	location, err := vDevice.PhysicalLocation()
+	if err != nil {
+		fmt.Printf("Couldn't get virtual device location: %s\n", err.Error())
+	}
+	fmt.Printf("Device created as %s. Press Ctrl+C to quit and destroy the device.\n", location)
+
 	var value int32 = 1
 	for {
 		eventTime := syscall.NsecToTimeval(int64(time.Now().Nanosecond()))
@@ -53,7 +68,7 @@ func main() {
 			value = 0
 		}
 
-		time.Sleep(1000)
+		time.Sleep(1 * time.Second)
 	}
 }
 

internal/virtualdevice/cleanup.go

@@ -0,0 +1,35 @@
+// Functions for cleaning up stale virtual devices
+
+package virtualdevice
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/holoplot/go-evdev"
+)
+
+func CleanupStaleVirtualDevices() {
+	devices, err := evdev.ListDevicePaths()
+	if err != nil {
+		fmt.Printf("Couldn't list devices while running cleanup: %s\n", err.Error())
+		return
+	}
+
+	for _, devicePath := range devices {
+		if strings.HasPrefix(devicePath.Name, "joyful-joystick") {
+			device, err := evdev.Open(devicePath.Path)
+			if err != nil {
+				fmt.Printf("Failed to open existing joyful device at '%s': %s\n", devicePath.Path, err.Error())
+				continue
+			}
+
+			err = evdev.DestroyDevice(device)
+			if err != nil {
+				fmt.Printf("Failed to destroy existing joyful device '%s' at '%s': %s\n", devicePath.Name, devicePath.Path, err.Error())
+			} else {
+				fmt.Printf("Destroyed stale joyful device '%s'\n", devicePath.Path)
+			}
+		}
+	}
+}