updater: Implement pkexec executor

updater/src/main/java/bisq/updater/InstallationFailedException.java

@@ -0,0 +1,11 @@
+package bisq.updater;
+
+public class InstallationFailedException extends RuntimeException {
+    public InstallationFailedException(String message) {
+        super(message);
+    }
+
+    public InstallationFailedException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

updater/src/main/java/bisq/updater/linux/pkexec/PkExec.java

@@ -0,0 +1,49 @@
+package bisq.updater.linux.pkexec;
+
+import java.io.IOException;
+
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+
+import lombok.extern.slf4j.Slf4j;
+
+
+
+import bisq.updater.InstallationFailedException;
+
+@Slf4j
+public class PkExec {
+    public static final int AUTHORIZATION_FAILED = 127;
+    private static final int AUTHORIZATION_DIALOG_DISMISSED = 126;
+
+    public static Process run(List<String> args) {
+        try {
+            var processBuilder = new ProcessBuilder("pkexec");
+            processBuilder.command().addAll(args);
+
+            Process process = processBuilder
+                    .redirectErrorStream(true)
+                    .redirectOutput(ProcessBuilder.Redirect.DISCARD)
+                    .start();
+
+            boolean isSuccess = process.waitFor(2, TimeUnit.MINUTES);
+            if (!isSuccess) {
+                throw new InstallationFailedException(processBuilder.command() + " didn't finish after 2 minutes.");
+            }
+
+            int exitCode = process.exitValue();
+            switch (exitCode) {
+                case AUTHORIZATION_FAILED:
+                    throw new PkexecAuthorizationFailedException("Couldn't get authorization from user.");
+                case AUTHORIZATION_DIALOG_DISMISSED:
+                    throw new PkexecAuthorizationFailedException("User dismissed authorization dialog.");
+            }
+
+            return process;
+
+        } catch (IOException | InterruptedException e) {
+            throw new InstallationFailedException("Installation failed.", e);
+        }
+    }
+}

updater/src/main/java/bisq/updater/linux/pkexec/PkexecAuthorizationFailedException.java

@@ -0,0 +1,7 @@
+package bisq.updater.linux.pkexec;
+
+public class PkexecAuthorizationFailedException extends RuntimeException {
+    public PkexecAuthorizationFailedException(String message) {
+        super(message);
+    }
+}