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testenv: check eclipse-titan version

The osmocom:latest repository currently has eclipse-titan 9.0.0 and we
assume that the user has at least this version installed. Add a check to
avoid subtle unexpected errors caused by using older versions.

Related: I57eecd6e0ea9e488a2110b029ddc313bd05cd1fa
Change-Id: Icace325f492ce803d6f25a30b128ee0676e16727
---
M _testenv/testenv/requirements.py
1 file changed, 27 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/35/40335/1

diff --git a/_testenv/testenv/requirements.py b/_testenv/testenv/requirements.py
index cd320d5..5ab61ad 100644
--- a/_testenv/testenv/requirements.py
+++ b/_testenv/testenv/requirements.py
@@ -1,8 +1,10 @@
 # Copyright 2024 sysmocom - s.f.m.c. GmbH
 # SPDX-License-Identifier: GPL-3.0-or-later
+from packaging.version import Version
 import logging
 import os.path
 import shutil
+import subprocess
 import sys
 import testenv
 import testenv.cmd
@@ -69,6 +71,30 @@
         sys.exit(1)
 
 
+def check_ttcn3_compiler_version():
+    if testenv.args.podman:
+        return
+
+    ttcn3_min_version = "9.0.0"
+
+    v = subprocess.run(["ttcn3_compiler", "-v"], capture_output=True, text=True)
+    current = None
+    for line in v.stderr.split("\n"):
+        if not line.startswith("Version: "):
+            continue
+
+        current = line.split(":", 1)[1].strip()
+        if Version(current) >= Version(ttcn3_min_version):
+            return
+
+        logging.error(f"Found ttcn3_compiler version {current}, but {ttcn3_min_version} or higher is required.")
+
+    if not current:
+        logging.error("Could not parse ttcn3_compiler version.")
+    logging.error(f"Please install at least version {ttcn3_min_version} and try again.")
+    sys.exit(1)
+
+
 def check_fftranscode():
     cmd = [
         "grep",
@@ -98,6 +124,7 @@
 
 def check():
     check_programs()
+    check_ttcn3_compiler_version()
 
     if not testenv.args.podman:
         check_fftranscode()

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