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package apidiff
import (
"bytes"
"fmt"
"io"
)
// Report describes the changes detected by Changes.
type Report struct {
Incompatible, Compatible []string
}
func (r Report) String() string {
var buf bytes.Buffer
if err := r.Text(&buf); err != nil {
return fmt.Sprintf("!!%v", err)
}
return buf.String()
}
func (r Report) Text(w io.Writer) error {
if err := r.TextIncompatible(w, true); err != nil {
return err
}
return r.TextCompatible(w)
}
func (r Report) TextIncompatible(w io.Writer, withHeader bool) error {
if withHeader {
return r.writeMessages(w, "Incompatible changes:", r.Incompatible)
}
return r.writeMessages(w, "", r.Incompatible)
}
func (r Report) TextCompatible(w io.Writer) error {
return r.writeMessages(w, "Compatible changes:", r.Compatible)
}
func (r Report) writeMessages(w io.Writer, header string, msgs []string) error {
if len(msgs) == 0 {
return nil
}
if header != "" {
if _, err := fmt.Fprintf(w, "%s\n", header); err != nil {
return err
}
}
for _, m := range msgs {
if _, err := fmt.Fprintf(w, "- %s\n", m); err != nil {
return err
}
}
return nil
}
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