gitlab ci: fix tags for pipeline generation jobs (#34789)

Gitlab does not merge lists when a job extends two other definitions
that include the same list (e.g. tags).  Also, it merges dictionaries
as long as the keys are distinct, but just takes the last mentioned
value when there are key collisions.

This change makes sure that when different tags are needed by a
pipeline, the ones we want are actually provided.  It also changes
the example stack to better follow this pattern so we do not lead
developers astray in the future.

share/spack/gitlab/cloud_pipelines/.gitlab-ci.yml

@@ -116,7 +116,13 @@ protected-publish:
 # First add a new spack.yml defining the pipeline to run in
 # share/spack/gitlab/cloud_pipelines/stacks/my-super-cool-stack/spack.yaml
 #
-# Then add the following entries at the bottom of this file:
+# Then add the following entries at the bottom of this file.
+#
+# Note that when extending other jobs, gitlab does not merge lists (nor
+# does it merge dictionary values in the case of key conflicts).  So lists
+# and duplicated dictionary keys are simply overridden.  For this reason,
+# you should inlclude your custom definitions at the end of the of the
+# extends list.
 #
 ########################################
 # My Super Cool Pipeline
@@ -124,28 +130,35 @@ protected-publish:
 # .my-super-cool-stack:
 #   variables:
 #     SPACK_CI_STACK_NAME: my-super-cool-stack
+#     tags: [ "all", "tags", "your", "job", "needs"]
 #
 # my-super-cool-stack-pr-generate:
-#   extends: [ ".my-super-cool-stack", ".pr-generate"]
+#   extends: [ ".pr-generate", ".my-super-cool-stack" ]
 #
 # my-super-cool-stack-protected-generate:
-#   extends: [ ".my-super-cool-stack", ".protected-generate"]
+#   extends: [ ".protected-generate", ".my-super-cool-stack" ]
 #
 # my-super-cool-stack-pr-build:
-#   extends: [ ".my-super-cool-stack", ".pr-build" ]
+#   extends: [ ".pr-build", ".my-super-cool-stack" ]
 #   trigger:
 #     include:
 #       - artifact: jobs_scratch_dir/cloud-ci-pipeline.yml
 #         job: my-super-cool-stack-pr-generate
 #     strategy: depend
+#   needs:
+#     - artifacts: True
+#       job: my-super-cool-stack-pr-generate
 #
 # my-super-cool-stack-protected-build:
-#   extends: [ ".my-super-cool-stack", ".protected-build" ]
+#   extends: [ ".protected-build", ".my-super-cool-stack" ]
 #   trigger:
 #     include:
 #       - artifact: jobs_scratch_dir/cloud-ci-pipeline.yml
 #         job: my-super-cool-stack-protected-generate
 #     strategy: depend
+#   needs:
+#     - artifacts: True
+#       job: my-super-cool-stack-protected-generate
 
 ########################################
 #          E4S Mac Stack
@@ -455,7 +468,10 @@ radiuss-protected-build:
 # RADIUSS for AWS
 ########################################
 
-# Call this AFTER .*-generate
+.tags-x86_64_v4:
+  tags: ["spack", "public", "aws", "medium", "x86_64_v4"]
+
+# Include this AFTER .*-generate in "extends" list
 .radiuss-aws-overrides:
   # This controls image for generate step; build step is controlled by spack.yaml
   # Note that generator emits OS info for build so these should be the same.
@@ -466,12 +482,10 @@ radiuss-protected-build:
     SPACK_CI_STACK_NAME: radiuss-aws
 
 radiuss-aws-pr-generate:
-  extends: [ ".radiuss-aws", ".pr-generate", ".radiuss-aws-overrides" ]
+  extends: [ ".radiuss-aws", ".pr-generate", ".radiuss-aws-overrides", ".tags-x86_64_v4" ]
-  tags: ["spack", "public", "medium", "x86_64_v4"]
 
 radiuss-aws-protected-generate:
-  extends: [ ".radiuss-aws", ".protected-generate", ".radiuss-aws-overrides" ]
+  extends: [ ".radiuss-aws", ".protected-generate", ".radiuss-aws-overrides", ".tags-x86_64_v4" ]
-  tags: ["spack", "public", "medium", "x86_64_v4"]
 
 radiuss-aws-pr-build:
   extends: [ ".radiuss-aws", ".pr-build" ]
@@ -571,7 +585,7 @@ data-vis-sdk-protected-build:
 # AWS AHUG Applications (x86_64)
 ########################################
 
-# Call this AFTER .*-generate
+# Include this AFTER .*-generate in "extends" lists
 .aws-ahug-overrides:
   # This controls image for generate step; build step is controlled by spack.yaml
   # Note that generator emits OS info for build so these should be the same.
@@ -582,12 +596,10 @@ data-vis-sdk-protected-build:
     SPACK_CI_STACK_NAME: aws-ahug
 
 aws-ahug-pr-generate:
-  extends: [ ".aws-ahug", ".pr-generate", ".aws-ahug-overrides" ]
+  extends: [ ".aws-ahug", ".pr-generate", ".aws-ahug-overrides", ".tags-x86_64_v4" ]
-  tags: ["spack", "public", "medium", "x86_64_v4"]
 
 aws-ahug-protected-generate:
-  extends: [ ".aws-ahug", ".protected-generate", ".aws-ahug-overrides" ]
+  extends: [ ".aws-ahug", ".protected-generate", ".aws-ahug-overrides", ".tags-x86_64_v4" ]
-  tags: ["spack", "public", "medium", "x86_64_v4"]
 
 aws-ahug-pr-build:
   extends: [ ".aws-ahug", ".pr-build" ]
@@ -660,12 +672,10 @@ aws-ahug-aarch64-protected-build:
     SPACK_CI_STACK_NAME: aws-isc
 
 aws-isc-pr-generate:
-  extends: [ ".aws-isc", ".pr-generate", ".aws-isc-overrides" ]
+  extends: [ ".aws-isc", ".pr-generate", ".aws-isc-overrides", ".tags-x86_64_v4" ]
-  tags: ["spack", "public", "medium", "x86_64_v4"]
 
 aws-isc-protected-generate:
-  extends: [ ".aws-isc", ".protected-generate", ".aws-isc-overrides" ]
+  extends: [ ".aws-isc", ".protected-generate", ".aws-isc-overrides", ".tags-x86_64_v4" ]
-  tags: ["spack", "public", "medium", "x86_64_v4"]
 
 aws-isc-pr-build:
   extends: [ ".aws-isc", ".pr-build" ]
@@ -768,18 +778,17 @@ tutorial-protected-build:
     SPACK_CI_STACK_NAME: ml-linux-x86_64-cpu
 
 .ml-linux-x86_64-cpu-generate:
-  extends: .ml-linux-x86_64-cpu
+  extends: [ .ml-linux-x86_64-cpu, ".tags-x86_64_v4" ]
   image: ghcr.io/spack/e4s-amazonlinux-2:v2022-03-21
-  tags: ["spack", "aws", "public", "medium", "x86_64_v4"]
 
 ml-linux-x86_64-cpu-pr-generate:
-  extends: [ ".ml-linux-x86_64-cpu-generate", ".pr-generate"]
+  extends: [ ".pr-generate", ".ml-linux-x86_64-cpu-generate" ]
 
 ml-linux-x86_64-cpu-protected-generate:
-  extends: [ ".ml-linux-x86_64-cpu-generate", ".protected-generate"]
+  extends: [ ".protected-generate", ".ml-linux-x86_64-cpu-generate" ]
 
 ml-linux-x86_64-cpu-pr-build:
-  extends: [ ".ml-linux-x86_64-cpu", ".pr-build" ]
+  extends: [ ".pr-build", ".ml-linux-x86_64-cpu" ]
   trigger:
     include:
       - artifact: jobs_scratch_dir/cloud-ci-pipeline.yml
@@ -790,7 +799,7 @@ ml-linux-x86_64-cpu-pr-build:
       job: ml-linux-x86_64-cpu-pr-generate
 
 ml-linux-x86_64-cpu-protected-build:
-  extends: [ ".ml-linux-x86_64-cpu", ".protected-build" ]
+  extends: [ ".protected-build", ".ml-linux-x86_64-cpu" ]
   trigger:
     include:
       - artifact: jobs_scratch_dir/cloud-ci-pipeline.yml
@@ -808,18 +817,17 @@ ml-linux-x86_64-cpu-protected-build:
     SPACK_CI_STACK_NAME: ml-linux-x86_64-cuda
 
 .ml-linux-x86_64-cuda-generate:
-  extends: .ml-linux-x86_64-cuda
+  extends: [ .ml-linux-x86_64-cuda, ".tags-x86_64_v4" ]
   image: ghcr.io/spack/e4s-amazonlinux-2:v2022-03-21
-  tags: ["spack", "aws", "public", "medium", "x86_64_v4"]
 
 ml-linux-x86_64-cuda-pr-generate:
-  extends: [ ".ml-linux-x86_64-cuda-generate", ".pr-generate"]
+  extends: [ ".pr-generate", ".ml-linux-x86_64-cuda-generate" ]
 
 ml-linux-x86_64-cuda-protected-generate:
-  extends: [ ".ml-linux-x86_64-cuda-generate", ".protected-generate"]
+  extends: [ ".protected-generate", ".ml-linux-x86_64-cuda-generate" ]
 
 ml-linux-x86_64-cuda-pr-build:
-  extends: [ ".ml-linux-x86_64-cuda", ".pr-build" ]
+  extends: [ ".pr-build", ".ml-linux-x86_64-cuda" ]
   trigger:
     include:
       - artifact: jobs_scratch_dir/cloud-ci-pipeline.yml
@@ -830,7 +838,7 @@ ml-linux-x86_64-cuda-pr-build:
       job: ml-linux-x86_64-cuda-pr-generate
 
 ml-linux-x86_64-cuda-protected-build:
-  extends: [ ".ml-linux-x86_64-cuda", ".protected-build" ]
+  extends: [ ".protected-build", ".ml-linux-x86_64-cuda"  ]
   trigger:
     include:
       - artifact: jobs_scratch_dir/cloud-ci-pipeline.yml
@@ -848,18 +856,17 @@ ml-linux-x86_64-cuda-protected-build:
     SPACK_CI_STACK_NAME: ml-linux-x86_64-rocm
 
 .ml-linux-x86_64-rocm-generate:
-  extends: .ml-linux-x86_64-rocm
+  extends: [ .ml-linux-x86_64-rocm, ".tags-x86_64_v4" ]
   image: ghcr.io/spack/e4s-amazonlinux-2:v2022-03-21
-  tags: ["spack", "aws", "public", "medium", "x86_64_v4"]
 
 ml-linux-x86_64-rocm-pr-generate:
-  extends: [ ".ml-linux-x86_64-rocm-generate", ".pr-generate"]
+  extends: [ ".pr-generate", ".ml-linux-x86_64-rocm-generate" ]
 
 ml-linux-x86_64-rocm-protected-generate:
-  extends: [ ".ml-linux-x86_64-rocm-generate", ".protected-generate"]
+  extends: [ ".protected-generate", ".ml-linux-x86_64-rocm-generate" ]
 
 ml-linux-x86_64-rocm-pr-build:
-  extends: [ ".ml-linux-x86_64-rocm", ".pr-build" ]
+  extends: [ ".pr-build", ".ml-linux-x86_64-rocm"  ]
   trigger:
     include:
       - artifact: jobs_scratch_dir/cloud-ci-pipeline.yml
@@ -870,7 +877,7 @@ ml-linux-x86_64-rocm-pr-build:
       job: ml-linux-x86_64-rocm-pr-generate
 
 ml-linux-x86_64-rocm-protected-build:
-  extends: [ ".ml-linux-x86_64-rocm", ".protected-build" ]
+  extends: [ ".protected-build", ".ml-linux-x86_64-rocm" ]
   trigger:
     include:
       - artifact: jobs_scratch_dir/cloud-ci-pipeline.yml