Added Eclipse Version Scraping script

eclipse-version-scraping/bin/main.dart

@@ -0,0 +1,103 @@
+import 'dart:io';
+
+import 'package:http/http.dart' as http;
+import 'package:html/parser.dart' as parser;
+import 'package:html/dom.dart';
+
+/// Entry point of the script.
+main(List<String> args) async {
+
+  String path = "./version.txt";
+  String recipient = "";
+  String eclipseUrl = "https://eclipse.org/downloads/eclipse-packages/";
+  String oldVersion = "";
+
+  /// Parse the given arguments.
+  if (args.length == 3) {
+    if (args[0] == "--file" || args[0] == "-f") {
+      path = args[1];
+      recipient = args[2];
+    } else {
+      help();
+    }
+  } else if (args.length == 1){
+    if (args[0] == "--help" || args[0] == "-h") {
+      help();
+    } else {
+      recipient = args[0];
+    }
+  } else if (args.length == 0) {
+    help();
+  }
+
+  if (!recipient.contains("@")) {
+    print("No correct mail address given.");
+    exit(-1);
+  }
+
+  http.Response response = await http.get(eclipseUrl);
+
+  if (response.body.trim().isEmpty) {
+    print("Website not available");
+    exit(1);
+  }
+
+  Document document = parser.parse(response.body);
+
+  String version = document.getElementById("descriptionText").text;
+
+  if (version.trim().isEmpty) {
+    print("No version information available.");
+    exit(1);
+  }
+
+  if (!version.contains("(") || !version.contains(")")) {
+    print("Version format seems to have changed.");
+    print("Version string: $version");
+    exit(2);
+  }
+
+  version = version.split("(")[1].split(")")[0].trim();
+
+  File file = new File(path);
+
+  if (await file.exists()) {
+    oldVersion = await file.readAsString();
+
+    oldVersion = oldVersion.trim();
+  } else {
+    oldVersion = "";
+  }
+
+  if (oldVersion == version) {
+    print("No version change");
+    exit(0);
+  }
+
+  file.writeAsString(version);
+
+  print("A new version is available!");
+
+  /// Send mail using the mail command.
+  await Process.run(
+      "mail",
+      ["-s", "\"New Eclipse Version: $version\"", recipient],
+      runInShell: true
+  );
+
+}
+
+/// Print the help text and exit the program.
+help() {
+  print("""
+Eclipse Version Scraping
+2017 (c) Marcel Kapfer
+Licensed under GNU GPL v3
+
+dart bin/main.dart [options] recipient
+
+  -h | --help   Print this help and exit
+  -f | --file   File to use for saving the version.""");
+
+  exit(0);
+}