51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
package config
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import (
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"os"
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"reflect"
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"regexp"
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"github.com/go-errors/errors"
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)
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var envPattern = regexp.MustCompile(`^env\((.*)\)$`)
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// LoadEnvHook is a mapstructure decode hook that loads environment variables
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// from strings formatted as env(VAR_NAME).
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func LoadEnvHook(f reflect.Kind, t reflect.Kind, data interface{}) (interface{}, error) {
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if f != reflect.String {
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return data, nil
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}
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value := data.(string)
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if matches := envPattern.FindStringSubmatch(value); len(matches) > 1 {
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if env := os.Getenv(matches[1]); len(env) > 0 {
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value = env
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}
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}
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return value, nil
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}
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const invalidFunctionsConfigFormat = `Invalid functions config format. Functions should be configured as:
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[functions.<function-name>]
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field = value
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Example:
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[functions.hello]
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verify_jwt = true`
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// ValidateFunctionsHook is a mapstructure decode hook that validates the functions config format.
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func ValidateFunctionsHook(f reflect.Type, t reflect.Type, data interface{}) (interface{}, error) {
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// Only handle FunctionConfig type
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if t != reflect.TypeOf(FunctionConfig{}) {
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return data, nil
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}
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// Check if source is not a map
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if f.Kind() != reflect.Map {
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return nil, errors.New(invalidFunctionsConfigFormat)
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}
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return data, nil
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}
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