mirror of https://github.com/rusefi/rusefi.git
84 lines
3.1 KiB
Java
84 lines
3.1 KiB
Java
package com.rusefi.util;
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import java.io.*;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.util.Scanner;
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import java.util.regex.Pattern;
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/**
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* This file would override file content only of content has changed, disregarding the magic tag line.
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*/
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public class LazyFileImpl implements LazyFile {
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private final String filename;
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private final StringBuffer content = new StringBuffer();
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private final StringBuffer contentWithoutTag = new StringBuffer();
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public LazyFileImpl(String filename) {
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this.filename = filename;
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}
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@Override
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public void write(String line) {
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content.append(line);
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String[] lines = line.split("\\r?\\n");
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for (String subLine : lines) {
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if (!subLine.toLowerCase().contains(LazyFile.LAZY_FILE_TAG_LOWER)) {
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contentWithoutTag.append(subLine);
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}
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}
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}
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public static String unifySpaces(String line) {
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line = line.replace("\r", "");
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return line.replaceAll("\n[\n]*", "");
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}
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@Override
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public void close() throws IOException {
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if (LazyFile.TEST.equals(filename))
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return;
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String fileContent = unifySpaces(readCurrentContent(filename));
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String newContent = unifySpaces(contentWithoutTag.toString());
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if (fileContent.equals(newContent)) {
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SystemOut.println(getClass().getSimpleName() + ": Not updating " + filename + " since looks to be the same content, new content size=" + contentWithoutTag.length());
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return;
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}
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for (int i = 0; i < Math.min(fileContent.length(), newContent.length()); i++) {
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if (fileContent.charAt(i) != newContent.charAt(i)) {
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SystemOut.println(getClass().getSimpleName() + " " + filename + ": Not same at " + i);
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if (i > 15 && i < fileContent.length() - 6 && i < newContent.length() - 6) {
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SystemOut.println("file " + fileContent.substring(i - 15, i + 5));
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SystemOut.println("newContent " + newContent.substring(i - 15, i + 5));
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}
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break;
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}
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}
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Files.createDirectories(Paths.get(new File(filename).getParent()));
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Writer fw = new PrintWriter(new OutputStreamWriter(new FileOutputStream(filename), IoUtils.CHARSET));
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fw.write(content.toString());
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fw.close();
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}
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private String readCurrentContent(String filename) throws IOException {
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if (LazyFile.TEST.equals(filename))
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return "";
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if (!new File(filename).exists()) {
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SystemOut.println(filename + " does not exist considering empty current content");
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return "";
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}
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Scanner in = new Scanner(Paths.get(filename), IoUtils.CHARSET.name());
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Pattern pat = Pattern.compile(".*\\R|.+\\z");
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String line;
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StringBuilder sb = new StringBuilder();
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while ((line = in.findWithinHorizon(pat, 0)) != null) {
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if (!line.toLowerCase().contains(LazyFile.LAZY_FILE_TAG_LOWER))
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sb.append(line);
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}
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return sb.toString();
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}
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}
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