[gnome-runtime-images/alatiera/scheduled-stable-rebuilds] avoid rebuilding stable releases unless needed

[Jordan Petridis <jpetridis src gnome org>]

commit 01930916703bcea689115a0819ca65c03899f121
Author: Jordan Petridis <jpetridis gnome org>
Date:   Thu Apr 23 11:50:33 2020 +0300

    avoid rebuilding stable releases unless needed

 .gitlab-ci.yml | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f56cd5d..1605b7b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -104,6 +104,10 @@ gnome:3.32:
     variables:
         BRANCH: "3.32"
         FD_BRANCH: "18.08"
+    rules:
+      - if: '$CI_PIPELINE_SOURCE == "schedule" && $REBUILD_3_32'
+        when: 'always'
+      - when: 'manual'
 
 gnome:3.34:
     stage: runtimes
@@ -111,6 +115,10 @@ gnome:3.34:
     variables:
         BRANCH: "3.34"
         FD_BRANCH: "19.08"
+    rules:
+      - if: '$CI_PIPELINE_SOURCE == "schedule" && $REBUILD_3_34'
+        when: 'always'
+      - when: 'manual'
 
 gnome:3.36:
     stage: runtimes
@@ -118,3 +126,7 @@ gnome:3.36:
     variables:
         BRANCH: "3.36"
         FD_BRANCH: "19.08"
+    rules:
+      - if: '$CI_PIPELINE_SOURCE == "schedule" && $REBUILD_3_36'
+        when: 'always'
+      - when: 'manual'