DockerCLI/vendor/github.com/Microsoft/hcsshim/internal/wclayer/layerexists.go

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package wclayer
import (
"github.com/Microsoft/hcsshim/internal/hcserror"
"github.com/sirupsen/logrus"
)
// LayerExists will return true if a layer with the given id exists and is known
// to the system.
func LayerExists(path string) (_ bool, err error) {
title := "hcsshim::LayerExists"
fields := logrus.Fields{
"path": path,
}
logrus.WithFields(fields).Debug(title)
defer func() {
if err != nil {
fields[logrus.ErrorKey] = err
logrus.WithFields(fields).Error(err)
} else {
logrus.WithFields(fields).Debug(title + " - succeeded")
}
}()
// Call the procedure itself.
var exists uint32
err = layerExists(&stdDriverInfo, path, &exists)
if err != nil {
return false, hcserror.New(err, title+" - failed", "")
}
fields["layer-exists"] = exists != 0
return exists != 0, nil
}