Try to improve cache management (#1256)

- Run pre-commit and tests on master schedule to make sure cache is
  built
- Simplify cache key

Author: therve

.github/workflows/test.yml

@@ -8,6 +8,8 @@ on:
   pull_request:
     branches:
       - master
+  schedule:
+    - cron: "0 2 * * *"
 
 concurrency:
   group: unit-${{ github.head_ref }}
@@ -17,9 +19,10 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     if: >
-      github.event.pull_request.draft == false &&
+      (github.event.pull_request.draft == false &&
       !contains(github.event.pull_request.labels.*.name, 'ci/skip') &&
-      !contains(github.event.pull_request.head.ref, 'datadog-api-spec/test/')
+      !contains(github.event.pull_request.head.ref, 'datadog-api-spec/test/')) ||
+      github.event_name == 'schedule'
     steps:
       - name: Get GitHub App token
         id: get_token
@@ -38,8 +41,8 @@ jobs:
       - name: Install pre-commit
         run: python -m pip install pre-commit
       - name: set PY
-        run: echo "PY=$(python -c 'import hashlib, sys, platform;print(hashlib.sha256(platform.python_version().encode()+sys.executable.encode()).hexdigest())')" >> $GITHUB_ENV
-      - uses: actions/cache@v2
+        run: echo "PY=$(python -c 'import platform;print(platform.python_version())')" >> $GITHUB_ENV
+      - uses: actions/cache@v3
         with:
           path: ~/.cache/pre-commit
           key: pre-commit|${{ env.PY }}|${{ hashFiles('.pre-commit-config.yaml') }}
@@ -78,7 +81,7 @@ jobs:
           # - platform: windows-latest
           #   python-version: 3.7
     runs-on: ${{ matrix.platform }}
-    if: github.event.pull_request.draft == false && !contains(github.event.pull_request.labels.*.name, 'ci/skip') && !contains(github.event.pull_request.head.ref, 'datadog-api-spec/test/')
+    if: (github.event.pull_request.draft == false && !contains(github.event.pull_request.labels.*.name, 'ci/skip') && !contains(github.event.pull_request.head.ref, 'datadog-api-spec/test/')) || github.event_name == 'schedule'
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}