Go implements a Find directory (including subdirectories) to replace the contents of a file

This is a creation in Article, where the information may have evolved or changed.

function

Finds the file by the specified directory, and if there is a subdirectory, the subdirectory will also search for the contents of the file to be replaced.

Defects

1. No text file is filtered out

2. When the file is too large, the efficiency is not high

Code

Package Mainimport ("Flag" "FMT" "Io/ioutil" "OS" "Path/filepath" "strings") type Replacehelper struct {Root    string// root directory OldText string//text to be replaced NewText string//New text}func (H *replacehelper) Dowrok () error {return filepath. Walk (H.root, H.walkcallback)}func (H replacehelper) walkcallback (path string, F OS. FileInfo, err Error) error {if Err! = Nil {return err}if f = = nil {return nil}if F.isdir () {//fmt. Pringln ("DIR:", path) return nil}//file type needs to be filtered buf, err: = Ioutil. ReadFile (PATH) if err! = Nil {//errreturn err}content: = String (BUF)//replace newcontent: = Strings. Replace (content, H.oldtext, H.newtext,-1)//re-write Ioutil. WriteFile (Path, []byte (Newcontent), 0) return Err}func main () {flag. Parse () Helper: = Replacehelper{root:    flag. ARG (0), Oldtext:flag. ARG (1), Newtext:flag. ARG (2),}err: = helper. Dowrok () If Err = = Nil {fmt. Println ("done!")} else {fmt. Println ("Error:", err.) Error ())}}