Use single (cached) build for tests & release (#182)

Use the same build for integration tests & release, so that we release what we tested
Use charmcraftcache for the build

Signed by Mykola & Jon: https://docs.google.com/document/d/1Wt0ds4dEcih4cvHWkbvvALtqonC_D9crcNQteX34SUg/edit

.github/workflows/ci.yaml

@@ -9,9 +9,13 @@ concurrency:
 on:
   pull_request:
   schedule:
-    - cron: "53 0 * * *" # Daily at 00:53 UTC
+    - cron: '53 0 * * *'  # Daily at 00:53 UTC
   # Triggered on push to branch "main" by .github/workflows/release.yaml
   workflow_call:
+    outputs:
+      artifact-prefix:
+        description: build_charm.yaml `artifact-prefix` output
+        value: ${{ jobs.build.outputs.artifact-prefix }}
 
 jobs:
   lint:
@@ -40,9 +44,8 @@ jobs:
 
   build:
     name: Build charms
-    uses: canonical/data-platform-workflows/.github/workflows/build_charm.yaml@v26.0.0
+    uses: canonical/data-platform-workflows/.github/workflows/build_charm.yaml@v29.0.0
     with:
-      cache: true
       charmcraft-snap-channel: latest/candidate  # TODO: remove after charmcraft 3.3 stable release
       path-to-charm-directory: ${{ matrix.path }}
     strategy:
@@ -82,7 +85,7 @@ jobs:
       - name: Download packed charm(s)
         uses: actions/download-artifact@v4
         with:
-          pattern: packed-charm-cache-true-*
+          pattern: ${{ needs.build.outputs.artifact-prefix }}-*
           merge-multiple: True
       - name: Select tests
         id: select-tests
@@ -126,7 +129,7 @@ jobs:
       - name: Download packed charm(s)
         uses: actions/download-artifact@v4
         with:
-          pattern: packed-charm-cache-true-*
+          pattern: ${{ needs.build.outputs.artifact-prefix }}-*
           merge-multiple: true
       - name: Select tests
         id: select-tests
@@ -172,7 +175,7 @@ jobs:
       - name: Download packed charm(s)
         uses: actions/download-artifact@v4
         with:
-          pattern: packed-charm-cache-true-*
+          pattern: ${{ needs.build.outputs.artifact-prefix }}-*
           merge-multiple: true
       - name: Select tests
         id: select-tests

.github/workflows/release.yaml

@@ -29,23 +29,16 @@ jobs:
       - lib-check
     uses: ./.github/workflows/ci.yaml
 
-  build:
-    name: Build charm
-    uses: canonical/data-platform-workflows/.github/workflows/[email protected]
-    with:
-      charmcraft-snap-channel: latest/candidate  # TODO: remove after charmcraft 3.3 stable release
-
   release:
     name: Release to Charmhub
     needs:
       - lib-check
       - ci-tests
-      - build
-    uses: canonical/data-platform-workflows/.github/workflows/[email protected]
+    uses: canonical/data-platform-workflows/.github/workflows/[email protected]
     with:
       charmcraft-snap-channel: latest/candidate  # TODO: remove after charmcraft 3.3 stable release
       channel: 3/edge
-      artifact-prefix: ${{ needs.build.outputs.artifact-prefix }}
+      artifact-prefix: ${{ needs.ci-tests.outputs.artifact-prefix }}
     secrets:
       charmhub-token: ${{ secrets.CHARMHUB_TOKEN }}
     permissions:

pyproject.toml

@@ -90,10 +90,10 @@ pytest = ">=7.2"
 juju = "^3.6.0"
 coverage = { extras = ["toml"], version = ">7.0" }
 pytest-operator = ">0.20"
-pytest-operator-cache = { git = "https://github.com/canonical/data-platform-workflows", tag = "v26.0.0", subdirectory = "python/pytest_plugins/pytest_operator_cache" }
+pytest-operator-cache = { git = "https://github.com/canonical/data-platform-workflows", tag = "v29.0.0", subdirectory = "python/pytest_plugins/pytest_operator_cache" }
 # To be enabled if we are using groups on integration tests
 # pytest-operator-groups = {git = "https://github.com/canonical/data-platform-workflows", tag = "v6.1.1", subdirectory = "python/pytest_plugins/pytest_operator_groups"}
-pytest-microceph = { git = "https://github.com/canonical/data-platform-workflows", tag = "v26.0.0", subdirectory = "python/pytest_plugins/microceph" }
+pytest-microceph = { git = "https://github.com/canonical/data-platform-workflows", tag = "v29.0.0", subdirectory = "python/pytest_plugins/microceph" }
 
 [tool.ruff]
 line-length = 99