Finally slack notifications work!

generate.yml

@@ -138,17 +138,18 @@
       failed_when: no
 
     - name: generate secure hash
-      command: "/usr/bin/travis encrypt --pro {{ secure.slack_token }} --no-interactive"
+      command: /usr/bin/travis encrypt --pro "{{ secure.slack_token }}" --no-interactive
       register: travis_secure
       when:
-        - travis.notifications.slack is defined
-        - travis.notifications.slack | length < 512
+        - (travis.notifications.slack.secure is defined and travis.notifications.slack.secure | length < 512) or
+          travis.notifications.slack.secure is not defined
 
-    - name: overwrite travis.notifications.slack
+    - name: overwrite travis.notifications.slack.secure
       set_fact:
         travis:
           notifications:
-            slack: "{{ travis_secure.stdout | regex_replace('\"', '') }}"
+            slack:
+              secure: "{{ travis_secure.stdout | regex_replace('\"', '') }}"
       when:
         travis_secure.stdout is defined
 

templates/travis.yml.j2

@@ -2,6 +2,9 @@
 {{ ansible_managed | comment }}
 language: python
 
+os: linux
+dist: xenial
+
 python:
   - "3.8"
 
@@ -11,7 +14,7 @@ services:
 env:
   global:
     namespace="{{ docker_namespace }}"
-  matrix:
+  jobs:
 {% for platform in meta.galaxy_info.platforms %}
 {% for version in platform.versions %}
 {% for tag in distribution_version_mapping[platform.name][version] %}
@@ -36,5 +39,7 @@ script:
 
 notifications:
   webhooks: https://galaxy.ansible.com/api/v1/notifications/
-  slack: "{{ travis.notifications.slack }}"
+  slack:
+    secure: {{ travis.notifications.slack.secure }}
+  on_success: change
   email: false