// SupportedArchitectures is specified on the EnvironCapability interface.
func (env *joyentEnviron) SupportedArchitectures() ([]string, error) {
env.archLock.Lock()
defer env.archLock.Unlock()
if env.supportedArchitectures != nil {
return env.supportedArchitectures, nil
}
cfg := env.Ecfg()
// Create a filter to get all images from our region and for the correct stream.
cloudSpec := simplestreams.CloudSpec{
Region: cfg.Region(),
Endpoint: cfg.SdcUrl(),
}
imageConstraint := imagemetadata.NewImageConstraint(simplestreams.LookupParams{
CloudSpec: cloudSpec,
Stream: cfg.ImageStream(),
})
var err error
env.supportedArchitectures, err = common.SupportedArchitectures(env, imageConstraint)
return env.supportedArchitectures, err
}
// findMatchingImages queries simplestreams for OS images that match the given
// requirements.
//
// If it finds no matching images, that's an error.
func findMatchingImages(e *azureEnviron, location, series string, arches []string) ([]*imagemetadata.ImageMetadata, error) {
endpoint := getEndpoint(location)
constraint := imagemetadata.NewImageConstraint(simplestreams.LookupParams{
CloudSpec: simplestreams.CloudSpec{location, endpoint},
Series: []string{series},
Arches: arches,
Stream: e.Config().ImageStream(),
})
sources, err := imagemetadata.GetMetadataSources(e)
if err != nil {
return nil, err
}
indexPath := simplestreams.DefaultIndexPath
images, _, err := imagemetadata.Fetch(sources, indexPath, constraint, signedImageDataOnly)
if len(images) == 0 || errors.IsNotFound(err) {
return nil, fmt.Errorf("no OS images found for location %q, series %q, architectures %q (and endpoint: %q)", location, series, arches, endpoint)
} else if err != nil {
return nil, err
}
return images, nil
}