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encoder.go
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encoder.go
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package config
import (
"fmt"
"io"
"strings"
)
// An Encoder writes config files to an output stream.
type Encoder struct {
w io.Writer
}
// NewEncoder returns a new encoder that writes to w.
func NewEncoder(w io.Writer) *Encoder {
return &Encoder{w}
}
// Encode writes the config in git config format to the stream of the encoder.
func (e *Encoder) Encode(cfg *Config) error {
for _, s := range cfg.Sections {
if err := e.encodeSection(s); err != nil {
return err
}
}
return nil
}
func (e *Encoder) encodeSection(s *Section) error {
if len(s.Options) > 0 {
if err := e.printf("[%s]\n", s.Name); err != nil {
return err
}
if err := e.encodeOptions(s.Options); err != nil {
return err
}
}
for _, ss := range s.Subsections {
if err := e.encodeSubsection(s.Name, ss); err != nil {
return err
}
}
return nil
}
func (e *Encoder) encodeSubsection(sectionName string, s *Subsection) error {
//TODO: escape
if err := e.printf("[%s \"%s\"]\n", sectionName, s.Name); err != nil {
return err
}
return e.encodeOptions(s.Options)
}
func (e *Encoder) encodeOptions(opts Options) error {
for _, o := range opts {
pattern := "\t%s = %s\n"
if strings.Contains(o.Value, "\\") {
pattern = "\t%s = %q\n"
}
if err := e.printf(pattern, o.Key, o.Value); err != nil {
return err
}
}
return nil
}
func (e *Encoder) printf(msg string, args ...interface{}) error {
_, err := fmt.Fprintf(e.w, msg, args...)
return err
}