[pancakes] Speed up (#29674)

* upgrade cache impl

* better cache

* run against right repo

* syntax

* speed fetch

.github/workflows/pr-auto-fix.yaml

@@ -10,15 +10,25 @@ jobs:
         id: current-time
         with:
           format: YYYYWW
+      - name: Get current time
+        uses: srfrnk/current-time@master
+        id: current-time-with-day
+        with:
+          format: YYYYWWd
       - name: Cache bazel
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         env:
           cache-name: bazel-cache
         with:
           path: ~/.cache/bazel
-          # formattedTime here is like 202132 - the year concatenated with the week
-          # as this changes every week, we cycle to a new cache once per week.
-          key: ${{ runner.os }}-${{ steps.current-time.outputs.formattedTime }}
+          # formattedTime here is like 2021323 - the year concatenated with the week then
+          # the day of that week.
+          # As this changes every day, we cycle to a new cache once per day, with lookup 
+          # across the week (and then the year).
+          key: ${{ runner.os }}-${{ steps.current-time-with-day.outputs.formattedTime }}
+          restore-keys: |
+            ${{ runner.os }}-${{ steps.current-time.outputs.formattedTime }}
+            ${{ runner.os }}-
       # Cancel current runs if they're still running
       # (saves processing on fast pushes)
       - name: Cancel Previous Runs
@@ -58,10 +68,14 @@ jobs:
           pip install pyyaml mako virtualenv
           sudo apt-get install python-dev
       - name: Check out repository code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           submodules: True
-          fetch-depth: 0
+      - name: Get the upstream code
+        run: |
+          cd ${{ github.workspace }}
+          git remote add upstream https://github.com/grpc/grpc
+          git fetch --no-tags --prune --progress --no-recurse-submodules --depth=1 upstream master
       # Run the things!
       - name: clang-tidy fixes
         run: ${{ github.workspace }}/tools/distrib/clang_tidy_code.sh --fix --only-changed || true

tools/distrib/run_clang_tidy.py

@@ -56,7 +56,7 @@ if args.only_changed:
     orig_files = set(args.files)
     actual_files = []
     output = subprocess.check_output(
-        ['git', 'diff', 'origin/master', 'HEAD', '--name-only'])
+        ['git', 'diff', 'upstream/master', 'HEAD', '--name-only'])
     for line in output.decode('ascii').splitlines(False):
         if line in orig_files:
             print(("check: %s" % line))