70 lines
1.6 KiB
Go
70 lines
1.6 KiB
Go
package merge
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import (
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"fmt"
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"strings"
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"github.com/qdm12/gluetun/internal/configuration/settings"
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)
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type ConfigSource interface {
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Read() (settings settings.Settings, err error)
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ReadHealth() (settings settings.Health, err error)
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String() string
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}
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type Source struct {
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sources []ConfigSource
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}
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func New(sources ...ConfigSource) *Source {
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return &Source{
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sources: sources,
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}
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}
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func (s *Source) String() string {
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sources := make([]string, len(s.sources))
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for i := range s.sources {
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sources[i] = s.sources[i].String()
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}
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return strings.Join(sources, ", ")
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}
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// Read reads the settings for each source, merging unset fields
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// with field set by the next source.
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// It then set defaults to remaining unset fields.
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func (s *Source) Read() (settings settings.Settings, err error) {
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for _, source := range s.sources {
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settingsFromSource, err := source.Read()
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if err != nil {
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return settings, fmt.Errorf("reading from %s: %w", source, err)
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}
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settings.MergeWith(settingsFromSource)
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}
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settings.SetDefaults()
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return settings, nil
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}
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// ReadHealth reads the health settings for each source, merging unset fields
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// with field set by the next source.
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// It then set defaults to remaining unset fields, and validate
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// all the fields.
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func (s *Source) ReadHealth() (settings settings.Health, err error) {
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for _, source := range s.sources {
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settingsFromSource, err := source.ReadHealth()
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if err != nil {
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return settings, fmt.Errorf("reading from %s: %w", source, err)
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}
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settings.MergeWith(settingsFromSource)
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}
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settings.SetDefaults()
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err = settings.Validate()
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if err != nil {
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return settings, err
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}
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return settings, nil
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}
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