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Service entry points currently resolve defaults, files, environment variables, and flags differently, which makes precedence inconsistent and prevents some services from using config files. Introduce one Viper-backed loader and migrate Combined, Management, Relay, Signal, and Proxy while preserving compatibility aliases and Management template expansion.
35 lines
776 B
Go
35 lines
776 B
Go
package config
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import (
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"bytes"
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"fmt"
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"os"
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"strings"
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"text/template"
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)
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// ExpandEnvTemplate substitutes Go-template references with environment values.
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func ExpandEnvTemplate(data []byte) ([]byte, error) {
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tmpl, err := template.New("config").Parse(string(data))
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if err != nil {
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return nil, fmt.Errorf("parse environment template: %w", err)
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}
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var output bytes.Buffer
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if err := tmpl.Execute(&output, environmentMap()); err != nil {
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return nil, fmt.Errorf("execute environment template: %w", err)
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}
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return output.Bytes(), nil
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}
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func environmentMap() map[string]string {
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environment := make(map[string]string)
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for _, entry := range os.Environ() {
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key, value, ok := strings.Cut(entry, "=")
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if ok {
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environment[key] = value
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}
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}
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return environment
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}
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