Add Tiltfile support

Author: dbast

identify/extensions.py

@@ -393,6 +393,7 @@
     'setup.cfg': EXTENSIONS['ini'],
     'sys.config': EXTENSIONS['erl'],
     'sys.config.src': EXTENSIONS['erl'],
+    'Tiltfile': {'text', 'tiltfile'},
     'Vagrantfile': EXTENSIONS['rb'],
     'WORKSPACE': EXTENSIONS['bzl'],
     'wscript': EXTENSIONS['py'],

tests/identify_test.py

@@ -172,6 +172,9 @@ def test_tags_from_path_plist_text(tmpdir):
         ('meson.build', {'text', 'meson'}),
         ('meson_options.txt', {'text', 'plain-text', 'meson'}),
         ('Vagrantfile', {'text', 'ruby'}),
+        ('Tiltfile', {'text', 'tiltfile'}),
+        ('Tiltfile.abc', {'text', 'tiltfile'}),
+        ('test.Tiltfile', {'text', 'tiltfile'}),
 
         # does not set binary / text
         ('f.plist', {'plist'}),