files.go

package pitreos

import (
	"fmt"
	"os"
	"text/tabwriter"

	"github.com/dustin/go-humanize"
)

func (p *PITR) ListBackupFiles(backupName string, filter Filter) error {
	bm, err := p.downloadBackupIndex(backupName)
	if err != nil {
		return fmt.Errorf("downloading index: %w", err)
	}

	if bm.Version != p.filemetaVersion {
		return fmt.Errorf("incompatible version of backup index, expected %q, found %q", p.filemetaVersion, bm.Version)
	}

	w := new(tabwriter.Writer)
	w.Init(os.Stdout, 23, 0, 3, ' ', 0)

	fmt.Fprintln(w, "Size\tEstimated Disk Size\tName")

	matchingFiles, err := bm.FindFilesMatching(filter)
	if err != nil {
		return fmt.Errorf("filtering files: %w", err)
	}

	for _, file := range matchingFiles {
		size := uint64(file.TotalSize)
		estimatedDiskSize, err := bm.ComputeFileEstimatedDiskSize(file.FileName)
		if err != nil {
			return fmt.Errorf("estimating disk size: %w", err)
		}

		fmt.Fprintf(w, "%s\t%s\t%s\n", humanize.Bytes(size), humanize.Bytes(estimatedDiskSize), file.FileName)
		w.Flush()
	}

	return nil
}