feat: using Jest's shard option for test load balancing

We can use jest's `shard` option to implement test load balancing. This required updating to jest v28, as sharding was introduced in this version.
For now the shard count is chosen manually and is statically set, however, this may be optimised in the future.
Test load balancing is now utilised for both `test` and `build` (platform) pipelines.

Author: emmacasolin

.gitlab-ci.yml

@@ -72,24 +72,36 @@ check:nix-dry:
     - if: $CI_COMMIT_BRANCH && $CI_COMMIT_BRANCH != 'master' && $CI_COMMIT_TITLE !~ /^[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
       when: manual
 
-check:test:
+check:test-generate:
   stage: check
-  needs: []
   script:
+    - mkdir -p ./tmp
     - >
         nix-shell --run '
-        npm run build --verbose;
-        npm test -- --ci --coverage;
+        ./scripts/test-pipelines.sh > ./tmp/test-pipelines.yml
         '
   artifacts:
     when: always
-    reports:
-      junit:
-        - ./tmp/junit/junit.xml
-      coverage_report:
-        coverage_format: cobertura
-        path: ./tmp/coverage/cobertura-coverage.xml
-  coverage: '/All files[^|]*\|[^|]*\s+([\d\.]+)/'
+    paths:
+      - ./tmp/test-pipelines.yml
+  rules:
+    # Runs on staging commits and ignores version commits
+    - if: $CI_COMMIT_BRANCH =~ /^feature.*$/ && $CI_COMMIT_TITLE !~ /^[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
+    # Manually run on commits other than master and staging and ignore version commits
+    - if: $CI_COMMIT_BRANCH && $CI_COMMIT_BRANCH !~ /^(?:master|staging)$/ && $CI_COMMIT_TITLE !~ /^[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
+      when: manual
+
+check:test:
+  stage: check
+  needs:
+    - check:test-generate
+  inherit:
+    variables: false
+  trigger:
+    include:
+      - artifact: tmp/test-pipelines.yml
+        job: check:test-generate
+    strategy: depend
   rules:
     # Runs on staging commits and ignores version commits
     - if: $CI_COMMIT_BRANCH =~ /^feature.*$/ && $CI_COMMIT_TITLE !~ /^[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
@@ -125,94 +137,47 @@ build:merge:
     # Runs on tag pipeline where the tag is a prerelease or release version
     - if: $CI_COMMIT_TAG =~ /^v[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
 
-build:linux:
+build:build-generate:
   stage: build
-  needs: []
   script:
+    - mkdir -p ./tmp
     - >
         nix-shell --run '
-        npm run build --verbose;
-        npm test -- --ci --coverage;
+        ./scripts/build-pipelines.sh > ./tmp/build-pipelines.yml
         '
   artifacts:
     when: always
-    reports:
-      junit:
-        - ./tmp/junit/junit.xml
-      coverage_report:
-        coverage_format: cobertura
-        path: ./tmp/coverage/cobertura-coverage.xml
     paths:
-      # Only the build:linux preserves the dist
-      - ./dist
-  coverage: '/All files[^|]*\|[^|]*\s+([\d\.]+)/'
-  rules:
-    # Runs on staging commits and ignores version commits
-    - if: $CI_COMMIT_BRANCH == 'staging' && $CI_COMMIT_TITLE !~ /^[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
-    # Runs on tag pipeline where the tag is a prerelease or release version
-    - if: $CI_COMMIT_TAG =~ /^v[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
-
-build:windows:
-  stage: build
-  needs: []
-  tags:
-    - windows
-  before_script:
-    - choco install nodejs --version=16.14.2 -y
-    - refreshenv
-  script:
-    - npm config set msvs_version 2019
-    - npm install --ignore-scripts
-    - $env:Path = "$(npm bin);" + $env:Path
-    - npm run build --verbose
-    - npm test -- --ci
-  artifacts:
-    when: always
-    reports:
-      junit:
-        - ./tmp/junit/junit.xml
+      - ./tmp/build-pipelines.yml
   rules:
     # Runs on staging commits and ignores version commits
-    - if: $CI_COMMIT_BRANCH == 'staging' && $CI_COMMIT_TITLE !~ /^[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
-    # Runs on tag pipeline where the tag is a prerelease or release version
-    - if: $CI_COMMIT_TAG =~ /^v[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
+    - if: $CI_COMMIT_BRANCH =~ /^feature.*$/ && $CI_COMMIT_TITLE !~ /^[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
+    # Manually run on commits other than master and staging and ignore version commits
+    - if: $CI_COMMIT_BRANCH && $CI_COMMIT_BRANCH !~ /^(?:master|staging)$/ && $CI_COMMIT_TITLE !~ /^[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
+      when: manual
 
-build:macos:
+build:platforms:
   stage: build
-  needs: []
-  tags:
-    - shared-macos-amd64
-  image: macos-11-xcode-12
-  variables:
-    HOMEBREW_NO_INSTALL_UPGRADE: "true"
-    HOMEBREW_NO_INSTALL_CLEANUP: "true"
-  before_script:
-    - eval "$(brew shellenv)"
-    - brew install node@16
-    - brew link --overwrite node@16
-    - hash -r
-  script:
-    - npm install --ignore-scripts
-    - export PATH="$(npm bin):$PATH"
-    - npm run build --verbose
-    - npm test -- --ci
-  artifacts:
-    when: always
-    reports:
-      junit:
-        - ./tmp/junit/junit.xml
+  needs:
+    - build:build-generate
+  inherit:
+    variables: false
+  trigger:
+    include:
+      - artifact: tmp/build-pipelines.yml
+        job: build:build-generate
+    strategy: depend
   rules:
     # Runs on staging commits and ignores version commits
-    - if: $CI_COMMIT_BRANCH == 'staging' && $CI_COMMIT_TITLE !~ /^[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
-    # Runs on tag pipeline where the tag is a prerelease or release version
-    - if: $CI_COMMIT_TAG =~ /^v[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
+    - if: $CI_COMMIT_BRANCH =~ /^feature.*$/ && $CI_COMMIT_TITLE !~ /^[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
+    # Manually run on commits other than master and staging and ignore version commits
+    - if: $CI_COMMIT_BRANCH && $CI_COMMIT_BRANCH !~ /^(?:master|staging)$/ && $CI_COMMIT_TITLE !~ /^[0-9]+\.[0-9]+\.[0-9]+(?:-.*[0-9]+)?$/
+      when: manual
 
 build:prerelease:
   stage: build
   needs:
-    - build:linux
-    - build:windows
-    - build:macos
+    - build:platforms
   # Don't interrupt publishing job
   interruptible: false
   before_script:
@@ -235,9 +200,7 @@ build:prerelease:
 integration:builds:
   stage: integration
   needs:
-    - build:linux
-    - build:windows
-    - build:macos
+    - build:platforms
   script:
     - mkdir -p ./builds
     - >
@@ -434,11 +397,7 @@ integration:merge:
   stage: integration
   needs:
     - build:merge
-    - job: build:linux
-      optional: true
-    - job: build:windows
-      optional: true
-    - job: build:macos
+    - job: build:platforms
       optional: true
     - job: integration:nix
       optional: true
@@ -514,9 +473,7 @@ release:deployment:tag:
 release:distribution:
   stage: release
   needs:
-    - build:linux
-    - build:windows
-    - build:macos
+    - build:platforms
     - integration:builds
     - integration:merge
     - release:deployment:tag