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80 lines
2.0 KiB
80 lines
2.0 KiB
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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}
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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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// Specify 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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// 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 := yaml.Marshal(c)
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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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// 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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