// Update updates a local charts directory.
//
// It first reads the requirements.yaml file, and then attempts to
// negotiate versions based on that. It will download the versions
// from remote chart repositories.
func (m *Manager) Update() error {
c, err := m.loadChartDir()
if err != nil {
return err
}
// If no requirements file is found, we consider this a successful
// completion.
req, err := chartutil.LoadRequirements(c)
if err != nil {
if err == chartutil.ErrRequirementsNotFound {
fmt.Fprintf(m.Out, "No requirements found in %s/charts.\n", m.ChartPath)
return nil
}
return err
}
// Check that all of the repos we're dependent on actually exist and
// the repo index names.
repoNames, err := m.getRepoNames(req.Dependencies)
if err != nil {
return err
}
// For each repo in the file, update the cached copy of that repo
if err := m.UpdateRepositories(); err != nil {
return err
}
// Now we need to find out which version of a chart best satisfies the
// requirements the requirements.yaml
lock, err := m.resolve(req, repoNames)
if err != nil {
return err
}
// Now we need to fetch every package here into charts/
if err := m.downloadAll(lock.Dependencies); err != nil {
return err
}
// If the lock file hasn't changed, don't write a new one.
oldLock, err := chartutil.LoadRequirementsLock(c)
if err == nil && oldLock.Digest == lock.Digest {
return nil
}
// Finally, we need to write the lockfile.
return writeLock(m.ChartPath, lock)
}
// Build rebuilds a local charts directory from a lockfile.
//
// If the lockfile is not present, this will run a Manager.Update()
func (m *Manager) Build() error {
c, err := m.loadChartDir()
if err != nil {
return err
}
// If a lock file is found, run a build from that. Otherwise, just do
// an update.
lock, err := chartutil.LoadRequirementsLock(c)
if err != nil {
return m.Update()
}
// A lock must accompany a requirements.yaml file.
req, err := chartutil.LoadRequirements(c)
if err != nil {
return fmt.Errorf("requirements.yaml cannot be opened: %s", err)
}
if sum, err := resolver.HashReq(req); err != nil || sum != lock.Digest {
return fmt.Errorf("requirements.lock is out of sync with requirements.yaml")
}
// Check that all of the repos we're dependent on actually exist.
if err := m.hasAllRepos(lock.Dependencies); err != nil {
return err
}
// For each repo in the file, update the cached copy of that repo
if err := m.UpdateRepositories(); err != nil {
return err
}
// Now we need to fetch every package here into charts/
if err := m.downloadAll(lock.Dependencies); err != nil {
return err
}
return nil
}