90 lines
2.9 KiB
Java
90 lines
2.9 KiB
Java
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import java.util.Objects;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.util.Scanner;
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import java.io.FileWriter;
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import java.net.URL;
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import java.io.BufferedInputStream;
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public class Main {
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private boolean disable_networking = false;
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public void main(String[] args) {
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boolean help_enqueued = false;
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int verbosity = 1;
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int p = 0;
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while (p < args.length) {
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try {
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if (Objects.equals(args[p], "-h")) {
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help_enqueued = true;
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}
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else if (Objects.equals(args[p], "-v")) {
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verbosity = Integer.parseInt(args[p+1]);
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p += 2;
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}
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else if (Objects.equals(args[p], "--offline")) {
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disable_networking = true;
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p += 2;
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}
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else {
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System.err.println("[ERROR] Unknown argument found: " + args[p] + "\n[ERROR] Please, use 'java Main -h' for help");
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System.exit(1);
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}
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}
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catch (Exception e) {
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System.err.println("[ERROR] Exception while parsing CLI arguments: " + e);
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System.err.println("[ERROR] Aborting further execution.");
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System.exit(1);
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}
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}
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if (help_enqueued) {
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printHelp();
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System.exit(0);
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}
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}
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public fetchResource(String remote_url, String output_filename) {
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BufferedInputStream in = new BufferedInputStream(new URL(remote_url).openStream());
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FileOutputStream fileOutputStream = new FileOutputStream()
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byte dataBuffer[] = new byte[1024];
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int bytesRead;
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while ((bytesRead = in.read(dataBuffer, 0, 1024)) != -1) {
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fileOutputStream.write(dataBuffer, 0, bytesRead);
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}
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}
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public printHelp() {
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String help_text = "";
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try {
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File help_file = new File("src/help.txt");
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Scanner help_file_scanner = new Scanner(help_file);
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} catch (FileNotFoundException e) {
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System.err.println("[WARN] Help file missing.");
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if (!disable_networking) {
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System.err.println("[INFO] Trying to recover it from the git server");
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fetchResource("http://139.162.162.130:3000/", "src/help.txt");
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File help_file = new File("src/help.txt");
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Scanner help_file_scanner = new Scanner(help_file);
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} else {
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System.err.println("[INFO] --offline flag is set, not recovering");
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System.exit(1);
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}
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}
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while (help_file_scanner.hasNextLine()) {
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help_text += help_file_scanner.nextLine();
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}
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help_file_scanner.close();
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System.out.println(help_text);
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}
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}
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