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111 lines
3.1 KiB
111 lines
3.1 KiB
/*
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Copyright 2015 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 chart
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import (
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"io/ioutil"
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"github.com/Masterminds/semver"
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"gopkg.in/yaml.v2"
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)
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// Chartfile describes a Helm Chart (e.g. Chart.yaml)
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type Chartfile struct {
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Name string `yaml:"name"`
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Description string `yaml:"description"`
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Version string `yaml:"version"`
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Keywords []string `yaml:"keywords,omitempty"`
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Maintainers []*Maintainer `yaml:"maintainers,omitempty"`
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Source []string `yaml:"source,omitempty"`
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Home string `yaml:"home"`
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Dependencies []*Dependency `yaml:"dependencies,omitempty"`
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Environment []*EnvConstraint `yaml:"environment,omitempty"`
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Expander *Expander `yaml:"expander,omitempty"`
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Schema string `yaml:"schema,omitempty"`
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}
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// Maintainer describes a chart maintainer.
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type Maintainer struct {
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Name string `yaml:"name"`
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Email string `yaml:"email,omitempty"`
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}
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// Dependency describes a specific dependency.
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type Dependency struct {
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Name string `yaml:"name,omitempty"`
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Version string `yaml:"version"`
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Location string `yaml:"location"`
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}
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// EnvConstraint specifies environmental constraints.
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type EnvConstraint struct {
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Name string `yaml:"name"`
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Version string `yaml:"version"`
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Extensions []string `yaml:"extensions,omitempty"`
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APIGroups []string `yaml:"apiGroups,omitempty"`
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}
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// Expander controls how template/ is evaluated.
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type Expander struct {
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// Kubernetes service name to look up in DNS.
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Name string `json:"name"`
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// During evaluation, which file to start from.
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Entrypoint string `json:"entrypoint"`
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}
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// LoadChartfile loads a Chart.yaml file into a *Chart.
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func LoadChartfile(filename string) (*Chartfile, error) {
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b, err := ioutil.ReadFile(filename)
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if err != nil {
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return nil, err
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}
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var y Chartfile
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return &y, yaml.Unmarshal(b, &y)
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}
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// Save saves a Chart.yaml file
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func (c *Chartfile) Save(filename string) error {
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b, err := c.Marshal()
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if err != nil {
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return err
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}
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return ioutil.WriteFile(filename, b, 0644)
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}
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// Marshal encodes the chart file into YAML.
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func (c *Chartfile) Marshal() ([]byte, error) {
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return yaml.Marshal(c)
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}
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// VersionOK returns true if the given version meets the constraints.
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//
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// It returns false if the version string or constraint is unparsable or if the
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// version does not meet the constraint.
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func (d *Dependency) VersionOK(version string) bool {
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c, err := semver.NewConstraint(d.Version)
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if err != nil {
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return false
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}
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v, err := semver.NewVersion(version)
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if err != nil {
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return false
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}
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return c.Check(v)
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}
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