Fix LS benchmarking tool to work with releases >= 7.10.0 (#13052) (#13053)

Starting with version 7.10.0 the name of LS packages changed, adding os and CPU architecture in the name. This change broke the downloading of those from the benchmarking tool. This commit fixes it, composing correctly the name, based on the version it has to download.

(cherry picked from commit b722360ebd)

tools/benchmark-cli/src/main/java/org/logstash/benchmark/cli/LogstashInstallation.java

@@ -114,12 +114,73 @@ public interface LogstashInstallation {
 
         private static void download(final File pwd, final String version)
             throws IOException, NoSuchAlgorithmException {
-            LsBenchDownloader.downloadDecompress(
+
-                pwd,
+            final String arch = retrieveCPUArchitecture();
-                String.format(
+            final String os = retrieveOS();
-                    "https://artifacts.elastic.co/downloads/logstash/logstash-%s.zip", version
+            final String extension = "windows".equals(os) ? "zip" : "tar.gz";
-                )
+
-            );
+            final String downloadUrl;
+            if (compareVersions(version, "7.10.0") >= 0) {
+                // version >= 7.10.0 url format
+                downloadUrl = String.format(
+                        "https://artifacts.elastic.co/downloads/logstash/logstash-%s-%s-%s.%s", version, os, arch, extension
+                );
+            } else {
+                // version < 7.10.0 url format
+                downloadUrl = String.format(
+                        "https://artifacts.elastic.co/downloads/logstash/logstash-%s.%s", version, extension
+                );
+            }
+
+            LsBenchDownloader.downloadDecompress(pwd, downloadUrl);
+        }
+
+        private static int compareVersions(String s, String t) {
+            final String[] sSplits = s.split("\\.");
+            final int sMajor = Integer.parseInt(sSplits[0]);
+            final int sMinor = Integer.parseInt(sSplits[1]);
+            final int sPatch = Integer.parseInt(sSplits[2]);
+
+            final String[] tSplits = t.split("\\.");
+            final int tMajor = Integer.parseInt(tSplits[0]);
+            final int tMinor = Integer.parseInt(tSplits[1]);
+            final int tPatch = Integer.parseInt(tSplits[2]);
+
+            if (sMajor == tMajor) {
+                if (sMinor == tMinor) {
+                    return Integer.compare(sPatch, tPatch);
+                } else {
+                    return Integer.compare(sMinor, tMinor);
+                }
+            } else {
+                return Integer.compare(sMajor, tMajor);
+            }
+        }
+
+        private static String retrieveOS() {
+            String osName = System.getProperty("os.name");
+            if (osName.matches("Mac OS X")) {
+                return "darwin";
+            }
+            if (osName.matches("[Ll]inux")) {
+                return "linux";
+            }
+            if (osName.matches("Windows")) {
+                return "windows";
+            }
+            throw new IllegalArgumentException("Unrecognized OS: " + osName);
+        }
+
+        private static String retrieveCPUArchitecture() {
+            final String arch = System.getProperty("os.arch");
+            switch (arch) {
+                case "aarch64":
+                    return "aarch64";
+                case "amd64":
+                    return "x86_64";
+                default:
+                    return arch;
+            }
         }
 
         private static LogstashInstallation setup(final Path location) {