Add script to configure matplotlib on server, no-interactive backend

.gitlab-ci.yml

@@ -16,6 +16,7 @@ navipy_install:
   - virtualenv -p python3 venv
   - source venv/bin/activate
   - pip3 install .
+  - python navipy/script/config_matplotlib_server.py # because no interactive backend
 
   artifacts:
     paths:

navipy/scripts/config_matplotlib_server.py

+#!/usr/bin/env python3
+import fileinput
+import matplotlib
+filename = matplotlib.matplotlib_fname()
+print('In file: {}'.format(filename))
+text_to_search = 'backend '
+replacement_text = '#backend '
+print('replace {} by {}'.format(text_to_search, replacement_text))
+with fileinput.FileInput(filename, inplace=True, backup='.bak') as file:
+    for line in file:
+        print(line.replace(text_to_search, replacement_text), end='')