helmfile/pkg/state/environment_values_loader.go

72 lines
2.1 KiB
Go

package state
import (
"fmt"
"github.com/imdario/mergo"
"github.com/roboll/helmfile/pkg/environment"
"github.com/roboll/helmfile/pkg/maputil"
"github.com/roboll/helmfile/pkg/tmpl"
"gopkg.in/yaml.v2"
"path/filepath"
)
type EnvironmentValuesLoader struct {
storage *Storage
readFile func(string) ([]byte, error)
}
func NewEnvironmentValuesLoader(storage *Storage, readFile func(string) ([]byte, error)) *EnvironmentValuesLoader {
return &EnvironmentValuesLoader{
storage: storage,
readFile: readFile,
}
}
func (ld *EnvironmentValuesLoader) LoadEnvironmentValues(missingFileHandler *string, envValues []interface{}) (map[string]interface{}, error) {
envVals := map[string]interface{}{}
for _, v := range envValues {
switch typedValue := v.(type) {
case string:
urlOrPath := typedValue
resolved, skipped, err := ld.storage.resolveFile(missingFileHandler, "environment values", urlOrPath)
if err != nil {
return nil, err
}
if skipped {
continue
}
for _, envvalFullPath := range resolved {
tmplData := EnvironmentTemplateData{environment.EmptyEnvironment, "", map[string]interface{}{}}
r := tmpl.NewFileRenderer(ld.readFile, filepath.Dir(envvalFullPath), tmplData)
bytes, err := r.RenderToBytes(envvalFullPath)
if err != nil {
return nil, fmt.Errorf("failed to load environment values file \"%s\": %v", envvalFullPath, err)
}
m := map[string]interface{}{}
if err := yaml.Unmarshal(bytes, &m); err != nil {
return nil, fmt.Errorf("failed to load environment values file \"%s\": %v", envvalFullPath, err)
}
if err := mergo.Merge(&envVals, &m, mergo.WithOverride); err != nil {
return nil, fmt.Errorf("failed to load \"%s\": %v", envvalFullPath, err)
}
}
case map[interface{}]interface{}:
m, err := maputil.CastKeysToStrings(typedValue)
if err != nil {
return nil, err
}
if err := mergo.Merge(&envVals, &m, mergo.WithOverride); err != nil {
return nil, fmt.Errorf("failed to merge %v: %v", typedValue, err)
}
continue
default:
return nil, fmt.Errorf("unexpected type of value: value=%v, type=%T", typedValue, typedValue)
}
}
return envVals, nil
}