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toml.go
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toml.go
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package config
import (
"bytes"
_ "embed"
"fmt"
"os"
"text/template"
"github.com/spf13/viper"
)
//go:embed config.toml.tpl
var DefaultConfigTemplate string
var configTemplate *template.Template
func init() {
var err error
tmpl := template.New("appConfigFileTemplate")
if configTemplate, err = tmpl.Parse(DefaultConfigTemplate); err != nil {
panic(err)
}
}
// ParseConfig retrieves the default environment configuration for the application.
func ParseConfig(v *viper.Viper) (*Config, error) {
conf := DefaultConfig()
err := v.Unmarshal(conf)
return conf, err
}
// SetConfigTemplate sets the custom app config template for the application.
func SetConfigTemplate(customTemplate string) error {
var err error
tmpl := template.New("appConfigFileTemplate")
if configTemplate, err = tmpl.Parse(customTemplate); err != nil {
return err
}
return nil
}
// WriteConfigFile renders config using the template and writes it to configFilePath.
func WriteConfigFile(configFilePath string, config interface{}) error {
var buffer bytes.Buffer
if err := configTemplate.Execute(&buffer, config); err != nil {
return err
}
if err := os.WriteFile(configFilePath, buffer.Bytes(), 0o600); err != nil {
return fmt.Errorf("failed to write file: %w", err)
}
return nil
}