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helm.go
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helm.go
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package helm
import (
"fmt"
"github.com/ghodss/yaml"
"github.com/jenkins-x/jx/pkg/util"
"io/ioutil"
"k8s.io/helm/pkg/chartutil"
"path/filepath"
)
const (
RequirementsFileName = "requirements.yaml"
DefaultHelmRepositoryURL = "http://jenkins-x-chartmuseum:8080"
defaultEnvironmentChartDir = "env"
)
// copied from helm to minimise dependencies...
// Dependency describes a chart upon which another chart depends.
//
// Dependencies can be used to express developer intent, or to capture the state
// of a chart.
type Dependency struct {
// Name is the name of the dependency.
//
// This must mach the name in the dependency's Chart.yaml.
Name string `json:"name"`
// Version is the version (range) of this chart.
//
// A lock file will always produce a single version, while a dependency
// may contain a semantic version range.
Version string `json:"version,omitempty"`
// The URL to the repository.
//
// Appending `index.yaml` to this string should result in a URL that can be
// used to fetch the repository index.
Repository string `json:"repository"`
// A yaml path that resolves to a boolean, used for enabling/disabling charts (e.g. subchart1.enabled )
Condition string `json:"condition,omitempty"`
// Tags can be used to group charts for enabling/disabling together
Tags []string `json:"tags,omitempty"`
// Enabled bool determines if chart should be loaded
Enabled bool `json:"enabled,omitempty"`
// ImportValues holds the mapping of source values to parent key to be imported. Each item can be a
// string or pair of child/parent sublist items.
ImportValues []interface{} `json:"import-values,omitempty"`
// Alias usable alias to be used for the chart
Alias string `json:"alias,omitempty"`
}
// ErrNoRequirementsFile to detect error condition
type ErrNoRequirementsFile error
// Requirements is a list of requirements for a chart.
//
// Requirements are charts upon which this chart depends. This expresses
// developer intent.
type Requirements struct {
Dependencies []*Dependency `json:"dependencies"`
}
// SetAppVersion sets the version of the app to use
func (r *Requirements) SetAppVersion(app string, version string, repository string) {
if r.Dependencies == nil {
r.Dependencies = []*Dependency{}
}
for _, dep := range r.Dependencies {
if dep != nil && dep.Name == app {
dep.Version = version
dep.Repository = repository
return
}
}
r.Dependencies = append(r.Dependencies, &Dependency{
Name: app,
Version: version,
Repository: repository,
})
}
// FindRequirementsFileName returns the default requirements.yaml file name
func FindRequirementsFileName(dir string) (string, error) {
names := []string{
filepath.Join(dir, defaultEnvironmentChartDir, RequirementsFileName),
filepath.Join(dir, RequirementsFileName),
}
for _, name := range names {
exists, err := util.FileExists(name)
if err != nil {
return "", err
}
if exists {
return name, nil
}
}
files, err := ioutil.ReadDir(dir)
if err != nil {
return "", err
}
for _, f := range files {
if f.IsDir() {
name := filepath.Join(dir, f.Name(), RequirementsFileName)
exists, err := util.FileExists(name)
if err != nil {
return "", err
}
if exists {
return name, nil
}
}
}
dirs := []string{
filepath.Join(dir, defaultEnvironmentChartDir),
dir,
}
for _, d := range dirs {
name := filepath.Join(d, RequirementsFileName)
exists, err := util.FileExists(d)
if err != nil {
return "", err
}
if exists {
return name, nil
}
}
return "", fmt.Errorf("Could not deduce the default requirements.yaml file name")
}
// LoadRequirementsFile loads the requirements file or creates empty requirements if the file does not exist
func LoadRequirementsFile(fileName string) (*Requirements, error) {
exists, err := util.FileExists(fileName)
if err != nil {
return nil, err
}
if exists {
data, err := ioutil.ReadFile(fileName)
if err != nil {
return nil, err
}
return LoadRequirements(data)
} else {
r := &Requirements{}
return r, nil
}
}
// LoadRequirements loads the requirements from some data
func LoadRequirements(data []byte) (*Requirements, error) {
r := &Requirements{}
return r, yaml.Unmarshal(data, r)
}
// SaveRequirementsFile saves the requirements file
func SaveRequirementsFile(fileName string, requirements *Requirements) error {
data, err := yaml.Marshal(requirements)
if err != nil {
return err
}
return ioutil.WriteFile(fileName, data, util.DefaultWritePermissions)
}
func LoadChartName(chartFile string) (string, error) {
chart, err := chartutil.LoadChartfile(chartFile)
if err != nil {
return "", err
}
return chart.Name, nil
}