65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
package internal
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import (
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"fmt"
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"os"
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"path/filepath"
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"sort"
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"strconv"
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"strings"
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)
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// Exists returns `true` if the given `path` on the current file system exists
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func Exists(path string) bool {
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_, err := os.Stat(path)
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return err == nil
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}
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// DirSize returns the space occupied by the given `path` on disk on the current
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// file system.
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func DirSize(path string) (int64, error) {
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var size int64
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err := filepath.Walk(path, func(_ string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if !info.IsDir() {
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size += info.Size()
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}
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return err
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})
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return size, err
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}
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// GetDatafiles returns a list of all data files stored in the database path
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// given by `path`. All datafiles are identified by the the glob `*.data` and
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// the basename is represented by an monotomic increasing integer.
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func GetDatafiles(path string) ([]string, error) {
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fns, err := filepath.Glob(fmt.Sprintf("%s/*.data", path))
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if err != nil {
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return nil, err
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}
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sort.Strings(fns)
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return fns, nil
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}
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// ParseIds will parse a list of datafiles as returned by `GetDatafiles` and
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// extract the id part and return a slice of ints.
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func ParseIds(fns []string) ([]int, error) {
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var ids []int
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for _, fn := range fns {
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fn = filepath.Base(fn)
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ext := filepath.Ext(fn)
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if ext != ".data" {
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continue
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}
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id, err := strconv.ParseInt(strings.TrimSuffix(fn, ext), 10, 32)
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if err != nil {
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return nil, err
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}
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ids = append(ids, int(id))
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}
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sort.Ints(ids)
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return ids, nil
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}
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