Method saveFile

app/src/processing/app/Util.java:168–204

Spew the contents of a String object out to a file. As of 3.0 beta 2, this will replace and write \r\n for newlines on Windows. https://github.com/processing/processing/issues/3455 As of 3.3.7, this puts a newline at the end of the file, per good practice/POSIX: https://stackoverflow.com/a/729795

(String text, File file)

   * per good practice/POSIX: https://stackoverflow.com/a/729795
   */
  static public void saveFile(String text, File file) throws IOException {
    String[] lines = text.split("\\r?\\n");
    File temp = File.createTempFile(file.getName(), null, file.getParentFile());
    try {
      // fix from cjwant to prevent symlinks from being destroyed.
      File canon = file.getCanonicalFile();
      // assign the var as second step since previous line may throw exception
      file = canon;
    } catch (IOException e) {
      throw new IOException("Could not resolve canonical representation of " +
                            file.getAbsolutePath());
    }
    // Could use saveStrings(), but the we wouldn't be able to checkError()
    PrintWriter writer = PApplet.createWriter(temp);
    for (String line : lines) {
      writer.println(line);
    }
    boolean error = writer.checkError();  // calls flush()
    writer.close();  // attempt to close regardless
    if (error) {
      throw new IOException("Error while trying to save " + file);
    }

    // remove the old file before renaming the temp file
    if (file.exists()) {
      boolean result = file.delete();
      if (!result) {
        throw new IOException("Could not remove old version of " +
                              file.getAbsolutePath());
      }
    }
    boolean result = temp.renameTo(file);
    if (!result) {
      throw new IOException("Could not replace " + file.getAbsolutePath() +
                            " with " + temp.getAbsolutePath());
    }
  }


  /**