Xah Talk Show 2022-01-06 WolframLang Tutorial, Find/Replace String in a Dir

• Python: Find Replace Text in Directory 📜
• Python: Find Replace Regex in Dir
• Golang: Regex Find Replace Text in Directory 📜
• Perl: Find Replace Text in Directory 📜
• Emacs: Xah Find Replace (xah-find.el)

write a find replace script in WolframLang

things need to do:

• list dir and subdirectory files
• how to filter by file name extension
• copy file (for backup)
• get date in iso format (for backup)
• find replace string with regex
• open file for read
• write to file

• WolframScript

(*find and replace strings in a dir. Version 2022-01-06*)

inputDir = "c:/Users/xah/xx/";
makeBackUp = True;
dirDepth = Infinity;
fileNameExtension = "*html";

findReplacePairs = {"initial" -> "XYZ", "commands" -> "Xcommands",
   "somethingNotThere" -> "Xcommands"};

processFile =
  Function[{filePath},
   Module[{content = ReadString[filePath]},
    If[makeBackUp,
     CopyFile[filePath, StringJoin[filePath, "~", nowDate, "~"],
      OverwriteTarget -> True]];
    content = StringReplace[content, findReplacePairs];
    WriteString[filePath, content]]];

Block[{nowDate = DateString[Now, "ISODate"]},
 processFile /@ FileNames[fileNameExtension, inputDir, dirDepth]]

• Wolfram: Plane Tiling Package 📦

• On Unix Filename Characters Problem (2008)
• Origin of Unix Dot File Names (Rob Pike. 2012)
• UNIX Tar Problem: File Length Truncation, Unicode Name Support
• Perl: Check Bad Filename 📜
• On Unix File System's Case Sensitivity (2001)

xah_talk_show_2022-01-06.txt