109 lines
3.2 KiB
Go
109 lines
3.2 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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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 chartutil
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import (
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"errors"
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"time"
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"github.com/ghodss/yaml"
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"k8s.io/helm/pkg/proto/hapi/chart"
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)
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const (
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requirementsName = "requirements.yaml"
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lockfileName = "requirements.lock"
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)
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var (
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// ErrRequirementsNotFound indicates that a requirements.yaml is not found.
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ErrRequirementsNotFound = errors.New(requirementsName + " not found")
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// ErrLockfileNotFound indicates that a requirements.lock is not found.
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ErrLockfileNotFound = errors.New(lockfileName + " not found")
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)
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// Dependency describes a chart upon which another chart depends.
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//
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// Dependencies can be used to express developer intent, or to capture the state
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// of a chart.
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type Dependency struct {
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// Name is the name of the dependency.
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//
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// This must mach the name in the dependency's Chart.yaml.
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Name string `json:"name"`
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// Version is the version (range) of this chart.
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//
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// A lock file will always produce a single version, while a dependency
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// may contain a semantic version range.
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Version string `json:"version,omitempty"`
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// The URL to the repository.
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//
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// Appending `index.yaml` to this string should result in a URL that can be
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// used to fetch the repository index.
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Repository string `json:"repository"`
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}
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// Requirements is a list of requirements for a chart.
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//
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// Requirements are charts upon which this chart depends. This expresses
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// developer intent.
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type Requirements struct {
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Dependencies []*Dependency `json:"dependencies"`
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}
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// RequirementsLock is a lock file for requirements.
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//
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// It represents the state that the dependencies should be in.
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type RequirementsLock struct {
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// Genderated is the date the lock file was last generated.
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Generated time.Time `json:"generated"`
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// Digest is a hash of the requirements file used to generate it.
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Digest string `json:"digest"`
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// Dependencies is the list of dependencies that this lock file has locked.
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Dependencies []*Dependency `json:"dependencies"`
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}
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// LoadRequirements loads a requirements file from an in-memory chart.
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func LoadRequirements(c *chart.Chart) (*Requirements, error) {
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var data []byte
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for _, f := range c.Files {
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if f.TypeUrl == requirementsName {
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data = f.Value
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}
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}
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if len(data) == 0 {
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return nil, ErrRequirementsNotFound
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}
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r := &Requirements{}
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return r, yaml.Unmarshal(data, r)
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}
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// LoadRequirementsLock loads a requirements lock file.
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func LoadRequirementsLock(c *chart.Chart) (*RequirementsLock, error) {
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var data []byte
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for _, f := range c.Files {
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if f.TypeUrl == lockfileName {
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data = f.Value
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}
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}
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if len(data) == 0 {
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return nil, ErrLockfileNotFound
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}
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r := &RequirementsLock{}
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return r, yaml.Unmarshal(data, r)
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}
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