refactor: move getRootMountPoint to disk.go

agent/agent.go

@@ -229,40 +229,3 @@ func (a *Agent) getFingerprint() string {
 
 	return fingerprint
 }
-
-// getRootMountPoint returns the appropriate root mount point for the system
-// For immutable systems like Fedora Silverblue, it returns /sysroot instead of /
-func (a *Agent) getRootMountPoint() string {
-	// Check for typical immutable system indicators
-	// 1. Check if /etc/os-release contains indicators of an immutable system
-	if osReleaseContent, err := os.ReadFile("/etc/os-release"); err == nil {
-		content := string(osReleaseContent)
-		// Look for indicators of atomic/immutable systems
-		if strings.Contains(content, "fedora") && strings.Contains(content, "silverblue") ||
-		   strings.Contains(content, "coreos") ||
-		   strings.Contains(content, "flatcar") ||
-		   strings.Contains(content, "rhel-atomic") ||
-		   strings.Contains(content, "centos-atomic") {
-			// Verify that /sysroot exists before returning it
-			if _, err := os.Stat("/sysroot"); err == nil {
-				return "/sysroot"
-			}
-		}
-	}
-
-	// 2. Check if /run/ostree is present (ostree-based systems like Silverblue)
-	if _, err := os.Stat("/run/ostree"); err == nil {
-		// Verify that /sysroot exists before returning it
-		if _, err := os.Stat("/sysroot"); err == nil {
-			return "/sysroot"
-		}
-	}
-
-	return "/"
-}
-
-// isImmutableSystem detects if the system is likely an immutable system like Fedora Silverblue
-// where the real root filesystem is mounted at /sysroot instead of /
-func (a *Agent) isImmutableSystem() bool {
-	return a.getRootMountPoint() != "/"
-}