automatic EOL conversion snippet? - eol

Question

I am working on a batch script that produces the deployment shell script according to my input, and I found my generated shell script has EOL \r\n, so I need to add a procedure to convert this file to use \n. I was looking for a solution in native batch but failed, so now I am trying to do it in other approaches.
The input is a typical shell script of commands with \r\n as EOL.
The output should be the same shell script with \n as EOL.
Any method that can be done in Windows environment will be appreciated.

Answer 1

nodejs approach:
const fs = require('fs');
fs.readFile('apply_patchx.sh','utf8',(err,data)=>{
fs.writeFile('apply_patch.sh',data.replace(/\r?\n/g,"\n"),()=>{
console.log('converted');
});
});
Call by node rn2n.js, input embedded in script.
Java approach:
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class RN2N {
public static void main(String[] args){
try {
BufferedReader br = new BufferedReader(new FileReader("apply_patchx.sh"));
BufferedWriter bw = new BufferedWriter(new FileWriter("apply_patch.sh"));
for(String line; (line = br.readLine()) != null;){
bw.write(line.replaceAll("\\\\r\\\\\n", "\\\\n"));
}
br.close();
bw.flush();
bw.close();
System.out.println("converted");
} catch (IOException e) {
System.exit(1);
}
}
}
Call by java RN2N, input embedded in script.