[ci] Improve caching

.gitlab-ci.yml

@@ -60,10 +60,12 @@ quality:
     - exists:
       - .pre-commit-config.yaml
   cache:
-    key: pre-commit-cache
+    key:
+      files:
+        - pixi.lock
     paths:
+      - _pixi
       - _cache/pre-commit
-      - _cache/pixi
   script:
     - pixi run -e qa-only qa-verbose
     - pixi run -e qa-only uv-check
@@ -81,9 +83,11 @@ tests:
     - job: quality
       optional: true
   cache:
-    key: test-cache-${TAG}-${PYTHON}
+    key:
+      files:
+        - pixi.lock
     paths:
-      - _cache/pixi
+      - _pixi
   script:
     - pixi run -e test-only-${PYTHON//\./} test-ci
   coverage: '/(?:TOTAL|total|Total).*? (100(?:\.0+)?\%|[1-9]?\d(?:\.\d+)?\%)$/'
@@ -105,9 +109,11 @@ documentation:
     - job: quality
       optional: true
   cache:
-    key: doc-cache
+    key:
+      files:
+        - pixi.lock
     paths:
-      - _cache/pixi
+      - _pixi
   script:
     - pixi run -e doc-only doc
     - pixi run -e doc-only doctest
@@ -120,9 +126,11 @@ python-package:
   needs:
     - tests
   cache:
-    key: build-cache
+    key:
+      files:
+        - pixi.lock
     paths:
-      - _cache/pixi
+      - _pixi
   script:
     - pixi run -e build-only build
     - pixi run -e build-only check
@@ -165,9 +173,11 @@ pypi:
   needs:
     - python-package
   cache:
-    key: pypi-cache
+    key:
+      files:
+        - pixi.lock
     paths:
-      - _cache/pixi
+      - _pixi
   rules:
     # conditions:
     # - only for tags in PEP-440 style (on any branch)