2017-12-13 23:46:52 +00:00
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package cache
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import (
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2018-01-16 22:30:10 +00:00
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"context"
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2017-12-13 23:46:52 +00:00
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"io/ioutil"
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2018-02-09 19:39:48 +00:00
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"github.com/containerd/continuity/fs"
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2017-12-13 23:46:52 +00:00
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"github.com/moby/buildkit/snapshot"
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)
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func ReadFile(ctx context.Context, ref ImmutableRef, p string) ([]byte, error) {
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2017-12-21 06:49:39 +00:00
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mount, err := ref.Mount(ctx, true)
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2017-12-13 23:46:52 +00:00
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if err != nil {
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return nil, err
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}
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lm := snapshot.LocalMounter(mount)
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root, err := lm.Mount()
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if err != nil {
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return nil, err
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}
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defer func() {
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if lm != nil {
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lm.Unmount()
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}
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}()
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2017-12-17 23:45:12 +00:00
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fp, err := fs.RootPath(root, p)
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2017-12-13 23:46:52 +00:00
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if err != nil {
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return nil, err
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}
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dt, err := ioutil.ReadFile(fp)
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if err != nil {
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return nil, err
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}
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if err := lm.Unmount(); err != nil {
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return nil, err
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}
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lm = nil
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return dt, err
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}
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