PlotJuggler CI with build from source (#20166)

* CI attempt

* fixing location

* fix

* fixes

* hardcode test_url for CI

* fixes

* cd fix

* Update tools/plotjuggler/juggle.py

Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>

* Update tools/plotjuggler/test_plotjuggler.py

* fixes

* fixes

Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>
old-commit-hash: 9144dd7c2f

tools/plotjuggler/test_plotjuggler.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import os
+import signal
+import subprocess
+import time
+import unittest
+
+from common.basedir import BASEDIR
+from common.timeout import Timeout
+from selfdrive.test.openpilotci import get_url
+
+class TestPlotJuggler(unittest.TestCase):
+
+  def test_install(self):
+    exit_code = os.system(os.path.join(BASEDIR, "tools/plotjuggler/install.sh"))
+    self.assertEqual(exit_code, 0)
+
+  def test_run(self):
+
+    test_url = get_url("ffccc77938ddbc44|2021-01-04--16-55-41", 0)
+
+    # Launch PlotJuggler with the executable in the bin directory
+    os.environ["PLOTJUGGLER_PATH"] = f'{os.path.join(BASEDIR, "tools/plotjuggler/bin/plotjuggler")}'
+    p = subprocess.Popen(f'QT_QPA_PLATFORM=offscreen {os.path.join(BASEDIR, "tools/plotjuggler/juggle.py")} \
+    "{test_url}"', stderr=subprocess.PIPE, shell=True,
+    start_new_session=True)
+
+    # Wait max 60 seconds for the "Done reading Rlog data" signal from the plugin
+    output = "\n"
+    with Timeout(60, error_msg=output):
+      while output.splitlines()[-1] != "Done reading Rlog data":
+        output += p.stderr.readline().decode("utf-8")
+
+    # ensure plotjuggler didn't crash after exiting the plugin
+    time.sleep(15)
+    self.assertEqual(p.poll(), None)
+    os.killpg(os.getpgid(p.pid), signal.SIGTERM)
+
+if __name__ == "__main__":
+  unittest.main()