Added update-langs root session

Author: adamlui

noxfile.py

@@ -6,7 +6,16 @@ def session(func) : return nox.session(venv_backend='none', name=func.__name__.r
 def lint(session): # staged monorepo files
     files = session.run('git', 'diff', '--cached', '--name-only', '--relative', silent=True, log=False).splitlines()
     if files : session.run('pre-commit', 'run', '--files', *files, *session.posargs)
-
 @session
 def lint_all(session): # all monorepo files
     session.run('pre-commit', 'run', '--all-files', *session.posargs)
+
+@session
+def update_langs(session): # update lang pkg data
+    from pathlib import Path
+    start_dir = Path.cwd()
+    for subdir in Path(__file__).parent.glob('*-languages'):
+        if subdir.is_dir():
+            session.chdir(subdir)
+            session.run('nox', '-s', 'update', *session.posargs, external=True)
+            session.chdir(start_dir)