mirror of https://github.com/docker/docs.git
47 lines
856 B
Go
47 lines
856 B
Go
package aufs
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import (
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"bufio"
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"io/ioutil"
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"os"
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"path"
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)
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// Return all the directories
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func loadIds(root string) ([]string, error) {
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dirs, err := ioutil.ReadDir(root)
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if err != nil {
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return nil, err
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}
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out := []string{}
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for _, d := range dirs {
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if !d.IsDir() {
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out = append(out, d.Name())
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}
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}
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return out, nil
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}
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// Read the layers file for the current id and return all the
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// layers represented by new lines in the file
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//
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// If there are no lines in the file then the id has no parent
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// and an empty slice is returned.
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func getParentIds(root, id string) ([]string, error) {
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f, err := os.Open(path.Join(root, "layers", id))
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if err != nil {
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return nil, err
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}
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defer f.Close()
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out := []string{}
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s := bufio.NewScanner(f)
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for s.Scan() {
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if t := s.Text(); t != "" {
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out = append(out, s.Text())
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}
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}
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return out, s.Err()
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}
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