ci: have a dedicated job to test platform specific tests

This change adds another job to the CI which can will test on platforms
other than ubuntu-latest. At the moment it's only testing macos-latest
with the fetcher tests but can be expanded in either direction.

Signed-off-by: crozzy <joseph.crosland@gmail.com>

Author: crozzy

.github/workflows/main.yml

@@ -69,13 +69,10 @@ jobs:
 
   tests:
     name: Tests
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        os:
-          - ubuntu-latest
-          - macos-latest
         go:
           - 'stable'
           - 'oldstable'
@@ -85,7 +82,7 @@ jobs:
         uses: actions/cache@v5
         with:
           path: ~/ok-by-run
-          key: commit-ok-${{ matrix.os }}-${{ matrix.go }}-${{ github.sha }}
+          key: commit-ok-${{ matrix.go }}-${{ github.sha }}
       - name: Checkout
         if: steps.previous.outputs.cache-hit != 'true'
         uses: actions/checkout@v6
@@ -107,13 +104,19 @@ jobs:
       - name: Tests
         run: |
           if test -f ~/ok-by-run; then
-            echo "::notice title=Commit Previously Passed::See $(cat ~/ok-by-run) (cache key 'commit-ok-${{ matrix.os }}-${{ matrix.go }}-${{ github.sha }}')"
+            echo "::notice title=Commit Previously Passed::See $(cat ~/ok-by-run) (cache key 'commit-ok-${{ matrix.go }}-${{ github.sha }}')"
             exit 0
           fi
           printf '%s/%s/actions/runs/%s/attempts/%s\n'\
             "${GITHUB_SERVER_URL}" "${GITHUB_REPOSITORY}" "${GITHUB_RUN_ID}" "${GITHUB_RUN_ATTEMPT}"\
             > ~/ok-by-run
-          go test -race ${RUNNER_DEBUG:+-v} -run TestFetchSimple ./libindex/
+          find . -name .git -prune -o -name testdata -prune -o -name go.mod -print | xargs -n1 dirname |
+          while read -r dir; do (
+            cd "$dir"
+            go list -m
+            go mod download
+            GOMAXPROCS=2 go test -race ${RUNNER_DEBUG:+-v} "-coverprofile=${{ runner.temp }}/$(go list -m | tr / _).codecov.out" -covermode=atomic ./...
+          ); done
       - name: Codecov
         if: >-
           steps.previous.outputs.cache-hit != 'true' &&
@@ -124,9 +127,28 @@ jobs:
           directory: ${{ runner.temp }}
           override_branch: ${{ github.ref_name }}
       - name: Database Logs
-        if: (failure() || env.RUNNER_DEBUG == 1) && runner.os == 'Linux'
+        if: failure() || env.RUNNER_DEBUG == 1
         run: |
           sudo -u postgres psql -c 'SELECT version();'
           sudo journalctl --unit postgresql.service --boot -0
           ls /var/log/postgresql/postgresql-*.log
           sudo cat /var/log/postgresql/postgresql-*.log
+
+  platform-tests:
+    name: Platform Tests
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - macos-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+      - uses: actions/setup-go@v6
+        with:
+          go-version: stable
+      - name: Test Fetcher
+        run: go test -race -v -run TestFetch ./libindex/