gitlab-ci: add Win 32-bit and Linux Clang builds to schedules.

These are interesting and may find very specific bugs from time to time,
but the usefulness is rare enough not to warrant to run at each commits.
This is just a waste of resources.

For scheduling finesse (in case we want to separate these in separate
scheduling), also rely on the existence of variables during scheduling.

Finally make sure that the non-scheduled builds are not run in schedule
pipelines (they are already run far enough).

.gitlab-ci.yml

@@ -16,6 +16,9 @@ variables:
 ## prepare docker images ##
 
 build-image:
+  rules:
+    - if: '$CI_PIPELINE_SOURCE != "schedule"'
+    - if: '$SCHEDULE_CLANG != null'
   stage: prepare
   variables:
     GIT_STRATEGY: none
@@ -36,7 +39,7 @@ build-image:
 
 build-image-win64:
   rules:
-    - if: '$CI_COMMIT_TAG == null'
+    - if: '$CI_COMMIT_TAG == null && $CI_PIPELINE_SOURCE != "schedule"'
   stage: prepare
   variables:
     GIT_STRATEGY: none
@@ -57,7 +60,7 @@ build-image-win64:
 
 build-image-win32:
   rules:
-    - if: '$CI_COMMIT_TAG == null'
+    - if: '$CI_COMMIT_TAG == null && $CI_PIPELINE_SOURCE == "schedule" && $SCHEDULE_WIN32 != null'
   stage: prepare
   variables:
     GIT_STRATEGY: none
@@ -79,6 +82,9 @@ build-image-win32:
 ## GNU/Linux 64-bit CIs (Debian testing) ##
 
 deps-debian:
+  rules:
+    - if: '$CI_PIPELINE_SOURCE != "schedule"'
+    - if: '$SCHEDULE_CLANG != null'
   stage: dependencies
   image: $CI_REGISTRY_IMAGE:build-debian-latest
   cache:
@@ -136,6 +142,8 @@ deps-debian:
   needs: ["deps-debian"]
 
 gimp-autotools-debian:
+  except:
+    - schedules
   extends: .gimp-debian-base
   script:
     - mkdir _build
@@ -147,6 +155,8 @@ gimp-autotools-debian:
     - make check
 
 gimp-distcheck-debian:
+  except:
+    - schedules
   extends: .gimp-debian-base
   script:
     - mkdir _build
@@ -160,7 +170,7 @@ gimp-distcheck-debian:
 
 gimp-meson-debian:
   rules:
-    - if: '$CI_COMMIT_TAG == null'
+    - if: '$CI_COMMIT_TAG == null && $CI_PIPELINE_SOURCE != "schedule"'
   extends: .gimp-debian-base
   script:
     - meson _build
@@ -170,7 +180,7 @@ gimp-meson-debian:
 
 gimp-clang-debian:
   rules:
-    - if: '$CI_COMMIT_TAG == null'
+    - if: '$CI_COMMIT_TAG == null && $CI_PIPELINE_SOURCE == "schedule" && $SCHEDULE_CLANG != null'
   extends: .gimp-debian-base
   variables:
     CC: "clang"
@@ -187,6 +197,8 @@ gimp-clang-debian:
 ## WINDOWS 64-bit CI (native MSYS2) ##
 
 deps-win64-native:
+  rules:
+    - if: '$CI_COMMIT_TAG == null && $CI_PIPELINE_SOURCE != "schedule"'
   stage: dependencies
   variables:
     MSYSTEM: "MINGW64"
@@ -208,6 +220,8 @@ deps-win64-native:
   needs: []
 
 gimp-win64-native:
+  rules:
+    - if: '$CI_COMMIT_TAG == null && $CI_PIPELINE_SOURCE != "schedule"'
   stage: gimp
   variables:
     MSYSTEM: "MINGW64"
@@ -232,7 +246,7 @@ gimp-win64-native:
 
 deps-win64:
   rules:
-    - if: '$CI_COMMIT_TAG == null'
+    - if: '$CI_COMMIT_TAG == null && $CI_PIPELINE_SOURCE != "schedule"'
   stage: dependencies
   image: $CI_REGISTRY_IMAGE:build-win64-latest
   variables:
@@ -265,7 +279,7 @@ deps-win64:
 
 gimp-win64:
   rules:
-    - if: '$CI_COMMIT_TAG == null'
+    - if: '$CI_COMMIT_TAG == null && $CI_PIPELINE_SOURCE != "schedule"'
   stage: gimp
   image: $CI_REGISTRY_IMAGE:build-win64-latest
   dependencies:
@@ -298,7 +312,7 @@ gimp-win64:
 
 deps-win32:
   rules:
-    - if: '$CI_COMMIT_TAG == null'
+    - if: '$CI_COMMIT_TAG == null && $CI_PIPELINE_SOURCE == "schedule" && $SCHEDULE_WIN32 != null'
   stage: dependencies
   image: $CI_REGISTRY_IMAGE:build-win32-latest
   variables:
@@ -328,7 +342,7 @@ deps-win32:
 
 gimp-win32:
   rules:
-    - if: '$CI_COMMIT_TAG == null'
+    - if: '$CI_COMMIT_TAG == null && $CI_PIPELINE_SOURCE == "schedule" && $SCHEDULE_WIN32 != null'
   stage: gimp
   image: $CI_REGISTRY_IMAGE:build-win32-latest
   dependencies:
@@ -358,6 +372,8 @@ gimp-win32:
       - gimp-prefix/
 
 cppcheck:
+  except:
+    - schedules
   stage: analysis
   before_script:
     - apt-get update
@@ -378,6 +394,8 @@ cppcheck:
 ## Ready-to-distribute ##
 
 sources:
+  except:
+    - schedules
   stage: distribution
   dependencies:
     - gimp-distcheck-debian
@@ -398,7 +416,7 @@ sources:
 
 win64-nightly:
   rules:
-    - if: '$CI_COMMIT_TAG == null'
+    - if: '$CI_COMMIT_TAG == null && $CI_PIPELINE_SOURCE != "schedule"'
   stage: distribution
   dependencies:
     - gimp-win64
@@ -475,7 +493,7 @@ win64-nightly:
 
 win32-nightly:
   rules:
-    - if: '$CI_COMMIT_TAG == null'
+    - if: '$CI_COMMIT_TAG == null && $CI_PIPELINE_SOURCE == "schedule" && $SCHEDULE_WIN32 != null'
   stage: distribution
   dependencies:
     - gimp-win32