53 lines
1.1 KiB
Go
53 lines
1.1 KiB
Go
package templates
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import (
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"errors"
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"fmt"
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"os"
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"github.com/evcc-io/evcc/util"
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"go.yaml.in/yaml/v4"
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)
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// Instance is an actual instantiated template
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type Instance struct {
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Type string
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Other map[string]any `yaml:",inline"`
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}
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// RenderInstance renders an actual configuration instance
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func RenderInstance(class Class, other map[string]any) (*Instance, error) {
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var cc struct {
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Template string
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Other map[string]any `mapstructure:",remain"`
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}
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if err := util.DecodeOther(other, &cc); err != nil {
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return nil, err
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}
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tmpl, err := ByName(class, cc.Template)
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if err != nil {
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return nil, err
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}
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b, _, err := tmpl.RenderResult(class, RenderModeInstance, other)
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if err != nil {
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return nil, util.NewConfigError(err)
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}
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if os.Getenv("EVCC_TEMPLATE_RENDER") == cc.Template {
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fmt.Println(string(b))
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}
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var instance Instance
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if err := yaml.Unmarshal(b, &instance); err != nil {
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return nil, fmt.Errorf("%w:\n%s", err, string(b))
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}
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if instance.Type == "" {
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return nil, errors.New("empty instance type- check for missing usage")
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}
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return &instance, nil
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}
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