Merge branch '3444714-LTS-support' into 'main'

POC  for LTS versions.

See merge request !209

includes/include.drupalci.hidden-variables.yml

@@ -38,6 +38,9 @@ variables:
   # The most recent, stable previous major version of Drupal.
   CORE_PREVIOUS_STABLE: "9.5.11"
 
+  # The LTS previous major version of Drupal.
+  CORE_PREVIOUS_LTS: "9.5.11"
+
   # The most recent security release in the previous major version of Drupal.
   CORE_PREVIOUS_SECURITY: "9.5.11"
 

includes/include.drupalci.main.yml

@@ -195,6 +195,10 @@
   if: '$OPT_IN_TEST_NEXT_MAJOR != "1" && $CI_COMMIT_REF_NAME != "project-update-bot-only"'
   when: never
 
+.opt-in-previous-lts-rule: &opt-in-previous-lts-rule
+  if: '$RUN_VARIANT_PREVIOUS_LTS != "1"'
+  when: never
+
 .phpunit-tests-exist-rule: &phpunit-tests-exist-rule
   - exists:
       - "**/tests/**/*Test.php"
@@ -385,6 +389,16 @@ composer (previous major):
     DRUPAL_CORE: $CORE_PREVIOUS_STABLE
     IGNORE_PROJECT_DRUPAL_CORE_VERSION: 1
 
+composer (previous LTS):
+  extends: .composer-base
+  rules:
+    - *opt-in-previous-lts-rule
+    - when: always
+  variables:
+    PHP_VERSION: $CORE_PREVIOUS_PHP_MIN
+    DRUPAL_CORE: $CORE_PREVIOUS_LTS
+    IGNORE_PROJECT_DRUPAL_CORE_VERSION: 1
+
 composer (next minor):
   extends: .composer-base
   rules:
@@ -862,6 +876,15 @@ nightwatch (previous major):
   needs:
     - "composer (previous major)"
 
+nightwatch (previous LTS):
+  extends: nightwatch
+  rules:
+    - *opt-in-previous-lts-rule
+    - *skip-nightwatch-rule
+    - *nightwatch-tests-exist-rule
+  needs:
+    - "composer (previous LTS)"
+
 nightwatch (next minor):
   allow_failure: true
   extends: nightwatch
@@ -988,6 +1011,15 @@ phpunit (previous major):
   needs:
     - "composer (previous major)"
 
+phpunit (previous LTS):
+  extends: phpunit
+  rules:
+    - *opt-in-previous-lts-rule
+    - *skip-phpunit-rule
+    - *phpunit-tests-exist-rule
+  needs:
+    - "composer (previous LTS)"
+
 # Future versions, hence breaks may arrive at any time: failure is allowed.
 phpunit (next minor):
   allow_failure: true

includes/include.drupalci.variables.yml

@@ -249,6 +249,11 @@ variables:
     value: "0"
     description: "Set to 1 to opt in testing against the maximum/latest supported version of PHP for the current stable version of Drupal."
 
+  RUN_VARIANT_PREVIOUS_LTS:
+    # @todo Change to 0
+    value: "1"
+    description: "(Experimental) Set to 1 to opt in testing against the previous LTS version of Drupal core."
+
   ################
   # Gitlab templates repository and reference
   #