func (s *ManifestDeployerSuite) assertCharm(c *gc.C, revision int, content ...ft.Entry) {
url, err := charm.ReadCharmURL(filepath.Join(s.targetPath, ".juju-charm"))
c.Assert(err, gc.IsNil)
c.Assert(url, gc.DeepEquals, charmURL(revision))
ft.Entries(content).Check(c, s.targetPath)
}
)
var (
logger = loggo.GetLogger("juju.worker.metrics.collect")
// errMetricsNotDefined is returned when the charm the uniter is running does
// not declared any metrics.
errMetricsNotDefined = errors.New("no metrics defined")
// readCharm function reads the charm directory and extracts declared metrics and the charm url.
readCharm = func(unitTag names.UnitTag, paths context.Paths) (*corecharm.URL, map[string]corecharm.Metric, error) {
ch, err := corecharm.ReadCharm(paths.GetCharmDir())
if err != nil {
return nil, nil, errors.Annotatef(err, "failed to read charm from: %v", paths.GetCharmDir())
}
chURL, err := charm.ReadCharmURL(path.Join(paths.GetCharmDir(), charm.CharmURLPath))
if err != nil {
return nil, nil, errors.Trace(err)
}
charmMetrics := map[string]corecharm.Metric{}
if ch.Metrics() != nil {
charmMetrics = ch.Metrics().Metrics
}
return chURL, charmMetrics, nil
}
// newRecorder returns a struct that implements the spool.MetricRecorder
// interface.
newRecorder = func(unitTag names.UnitTag, paths context.Paths, metricFactory spool.MetricFactory) (spool.MetricRecorder, error) {
chURL, charmMetrics, err := readCharm(unitTag, paths)
if err != nil {