feat: support multipath in Kairos SDK

Signed-off-by: Aidan Leuck <aidan_leuck@selinc.com>

ghw/disk_partition_handler.go

@@ -0,0 +1,58 @@
+package ghw
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/kairos-io/kairos-sdk/types"
+)
+
+type DiskPartitionHandler struct {
+	DiskName string
+}
+
+// Validate that DiskPartitionHandler implements PartitionHandler interface
+var _ PartitionHandler = &DiskPartitionHandler{}
+
+func NewDiskPartitionHandler(diskName string) *DiskPartitionHandler {
+	return &DiskPartitionHandler{DiskName: diskName}
+}
+
+func (d *DiskPartitionHandler) GetPartitions(paths *Paths, logger *types.KairosLogger) types.PartitionList {
+	out := make(types.PartitionList, 0)
+	path := filepath.Join(paths.SysBlock, d.DiskName)
+	logger.Logger.Debug().Str("file", path).Msg("Reading disk file")
+	files, err := os.ReadDir(path)
+	if err != nil {
+		logger.Logger.Error().Err(err).Msg("failed to read disk partitions")
+		return out
+	}
+	for _, file := range files {
+		fname := file.Name()
+		if !strings.HasPrefix(fname,  d.DiskName) {
+			continue
+		}
+		logger.Logger.Debug().Str("file", fname).Msg("Reading partition file")
+		partitionPath := filepath.Join(d.DiskName, fname)
+		size := partitionSizeBytes(paths, partitionPath, logger)
+		mp, pt := partitionInfo(paths, fname, logger)
+		du := diskPartUUID(paths, partitionPath, logger)
+		if pt == "" {
+			pt = diskPartTypeUdev(paths, partitionPath, logger)
+		}
+		fsLabel := diskFSLabel(paths, partitionPath, logger)
+		p := &types.Partition{
+			Name:            fname,
+			Size:            uint(size / (1024 * 1024)),
+			MountPoint:      mp,
+			UUID:            du,
+			FilesystemLabel: fsLabel,
+			FS:              pt,
+			Path:            filepath.Join("/dev", fname),
+			Disk:            filepath.Join("/dev", d.DiskName),
+		}
+		out = append(out, p)
+	}
+	return out
+}