// Diff consumes the entire reader streams into memory before generating a diff
// which then gets filled into the buffer. This implementation stores and
// manipulates all three values in memory.
func (diff *differ) Diff(out io.Writer, a io.ReadSeeker, b io.ReadSeeker) error {
var src, dst []byte
var err error
if src, err = ioutil.ReadAll(a); err != nil {
return err
}
if dst, err = ioutil.ReadAll(b); err != nil {
return err
}
d := difflib.UnifiedDiff{
A: difflib.SplitLines(string(src)),
B: difflib.SplitLines(string(dst)),
Context: 3,
}
return difflib.WriteUnifiedDiff(out, d)
}
func (t *ZkLiveTree) diffNode(node *ZkNode) error {
log.Printf("diff node @ `%s`", node.Path)
diff := difflib.UnifiedDiff{
FromFile: "a" + node.Path,
ToFile: "b" + node.Path,
Context: 3,
}
if data, err := t.client.GetData().ForPath(node.Path); err == nil {
diff.A = difflib.SplitLines(node.Value)
diff.B = difflib.SplitLines(string(data))
} else if err == curator.ErrNoNode {
diff.A = difflib.SplitLines(node.Value)
} else {
return err
}
if err := difflib.WriteUnifiedDiff(os.Stdout, diff); err != nil {
return err
}
return nil
}