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134 lines
4.3 KiB
134 lines
4.3 KiB
/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package action
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import (
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"regexp"
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"time"
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"github.com/pkg/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/discovery"
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"helm.sh/helm/pkg/chartutil"
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"helm.sh/helm/pkg/kube"
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"helm.sh/helm/pkg/registry"
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"helm.sh/helm/pkg/release"
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"helm.sh/helm/pkg/storage"
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)
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// Timestamper is a function capable of producing a timestamp.Timestamper.
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//
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// By default, this is a time.Time function. This can be overridden for testing,
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// though, so that timestamps are predictable.
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var Timestamper = time.Now
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var (
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// errMissingChart indicates that a chart was not provided.
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errMissingChart = errors.New("no chart provided")
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// errMissingRelease indicates that a release (name) was not provided.
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errMissingRelease = errors.New("no release provided")
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// errInvalidRevision indicates that an invalid release revision number was provided.
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errInvalidRevision = errors.New("invalid release revision")
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// errInvalidName indicates that an invalid release name was provided
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errInvalidName = errors.New("invalid release name, must match regex ^(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])+$ and the length must not longer than 53")
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)
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// ValidName is a regular expression for names.
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//
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// According to the Kubernetes help text, the regular expression it uses is:
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//
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// (([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])?
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//
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// We modified that. First, we added start and end delimiters. Second, we changed
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// the final ? to + to require that the pattern match at least once. This modification
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// prevents an empty string from matching.
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var ValidName = regexp.MustCompile("^(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])+$")
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// Configuration injects the dependencies that all actions share.
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type Configuration struct {
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// Discovery contains a discovery client
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Discovery discovery.DiscoveryInterface
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// Releases stores records of releases.
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Releases *storage.Storage
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// KubeClient is a Kubernetes API client.
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KubeClient kube.KubernetesClient
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// RegistryClient is a client for working with registries
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RegistryClient *registry.Client
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Capabilities *chartutil.Capabilities
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Log func(string, ...interface{})
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}
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// capabilities builds a Capabilities from discovery information.
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func (c *Configuration) capabilities() *chartutil.Capabilities {
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if c.Capabilities == nil {
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return chartutil.DefaultCapabilities
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}
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return c.Capabilities
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}
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// Now generates a timestamp
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//
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// If the configuration has a Timestamper on it, that will be used.
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// Otherwise, this will use time.Now().
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func (c *Configuration) Now() time.Time {
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return Timestamper()
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}
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func (c *Configuration) releaseContent(name string, version int) (*release.Release, error) {
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if err := validateReleaseName(name); err != nil {
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return nil, errors.Errorf("releaseContent: Release name is invalid: %s", name)
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}
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if version <= 0 {
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return c.Releases.Last(name)
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}
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return c.Releases.Get(name, version)
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}
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// GetVersionSet retrieves a set of available k8s API versions
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func GetVersionSet(client discovery.ServerGroupsInterface) (chartutil.VersionSet, error) {
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groups, err := client.ServerGroups()
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if err != nil {
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return chartutil.DefaultVersionSet, err
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}
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// FIXME: The Kubernetes test fixture for cli appears to always return nil
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// for calls to Discovery().ServerGroups(). So in this case, we return
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// the default API list. This is also a safe value to return in any other
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// odd-ball case.
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if groups.Size() == 0 {
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return chartutil.DefaultVersionSet, nil
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}
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versions := metav1.ExtractGroupVersions(groups)
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return chartutil.NewVersionSet(versions...), nil
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}
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// recordRelease with an update operation in case reuse has been set.
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func (c *Configuration) recordRelease(r *release.Release) {
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if err := c.Releases.Update(r); err != nil {
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c.Log("warning: Failed to update release %s: %s", r.Name, err)
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}
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}
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