func main() {
flag.Usage = func() {
fmt.Fprintln(os.Stderr, "Shows the difference between two objects\n")
fmt.Fprintln(os.Stderr, "Usage: noms diff <object1> <object2>\n")
flag.PrintDefaults()
fmt.Fprintf(os.Stderr, "\nSee \"Spelling Objects\" at https://github.com/attic-labs/noms/blob/master/doc/spelling.md for details on the object argument.\n\n")
}
flag.Parse()
if *showHelp {
flag.Usage()
return
}
if len(flag.Args()) != 2 {
util.CheckError(errors.New("expected exactly two arguments"))
}
db1, value1, err := spec.GetPath(flag.Arg(0))
util.CheckError(err)
defer db1.Close()
db2, value2, err := spec.GetPath(flag.Arg(1))
util.CheckError(err)
defer db2.Close()
waitChan := outputpager.PageOutput(!*outputpager.NoPager)
diff.Diff(os.Stdout, value1, value2)
fmt.Fprintf(os.Stdout, "\n")
if waitChan != nil {
os.Stdout.Close()
<-waitChan
}
}
func writeDiffLines(node LogNode, db datas.Database, maxLines, lineno int, w io.Writer) (lineCnt int, err error) {
mlw := &maxLineWriter{numLines: lineno, maxLines: maxLines, node: node, dest: w, needsPrefix: true}
parents := node.commit.Get(datas.ParentsField).(types.Set)
var parent types.Value = nil
if parents.Len() > 0 {
parent = parents.First()
}
if parent == nil {
_, err = fmt.Fprint(mlw, "\n")
return 1, err
}
parentCommit := parent.(types.Ref).TargetValue(db).(types.Struct)
err = diff.Diff(mlw, parentCommit.Get(datas.ValueField), node.commit.Get(datas.ValueField))
if err != nil {
mlw.forceWrite([]byte("...\n"))
mlw.numLines++
err = nil
}
if !node.lastCommit {
mlw.forceWrite([]byte("\n"))
}
return mlw.numLines, err
}