Add Linux support and Dockerfile for testing

Author: lumipallo-labs

Dockerfile

@@ -0,0 +1,8 @@
+FROM golang:latest
+
+WORKDIR /app
+COPY . .
+RUN go build -o diskdive .
+
+ENTRYPOINT ["./diskdive"]
+CMD ["/app"]

internal/model/drives.go

@@ -61,13 +61,12 @@ func getWindowsDrives() ([]Drive, error) {
 }
 
 func getUnixMounts() ([]Drive, error) {
-	// Placeholder for future Linux support
-	// For now, just return root
-	home, _ := os.UserHomeDir()
-	if home == "" {
-		home = "/"
+	// For Linux, return root filesystem
+	drive := Drive{
+		Letter: "/",
+		Path:   "/",
+		Label:  runtime.GOOS,
 	}
-	return []Drive{
-		{Letter: runtime.GOOS, Path: home, Label: home},
-	}, nil
+	drive.TotalBytes, drive.FreeBytes = GetDiskSpace("/")
+	return []Drive{drive}, nil
 }

internal/model/drives_other.go

@@ -2,11 +2,19 @@
 
 package model
 
+import "syscall"
+
 func getPlatformDrives() ([]Drive, error) {
 	return getUnixMounts()
 }
 
-func getDiskSpace(path string) (total, free int64) {
-	// Placeholder for Unix implementation
-	return 0, 0
+// GetDiskSpace returns disk space information for a given path using statfs
+func GetDiskSpace(path string) (total, free int64) {
+	var stat syscall.Statfs_t
+	if err := syscall.Statfs(path, &stat); err != nil {
+		return 0, 0
+	}
+	total = int64(stat.Blocks) * int64(stat.Bsize)
+	free = int64(stat.Bavail) * int64(stat.Bsize)
+	return total, free
 }

scripts/build-mac-app.sh

@@ -119,7 +119,7 @@ cat > "$APP_BUNDLE/Contents/Info.plist" << PLIST
     <key>CFBundlePackageType</key>
     <string>APPL</string>
     <key>LSMinimumSystemVersion</key>
-    <string>10.13</string>
+    <string>12.0</string>
     <key>NSHighResolutionCapable</key>
     <true/>
 </dict>