feat: run changed testsuites in PR ci

.github/workflows/ci.yml

@@ -8,6 +8,11 @@ on:
     branches:
       - main
 
+# cancel in-progress runs on new commits to same PR (gitub.event.number)
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.number || github.sha }}
+  cancel-in-progress: true
+
 jobs:
   ci:
     timeout-minutes: 10
@@ -33,6 +38,55 @@ jobs:
       - name: audit
         if: (${{ success() }} || ${{ failure() }})
         run: pnpm audit
-      - name: test
+      - name: test self
         if: (${{ success() }} || ${{ failure() }})
         run: pnpm test:self
+
+  find_changed_testfiles:
+    if: (${{ github.event.number }})
+    runs-on: ubuntu-latest
+    outputs:
+      changed: ${{steps.list.outputs.changed_suites}}
+    steps:
+      - uses: actions/checkout@v3
+      - id: list
+        env:
+          GH_TOKEN: ${{ github.token }}
+          PR_NUMBER: ${{ github.event.number }}
+        run: |
+          echo "changed_suites=$(\
+            gh pr diff $PR_NUMBER --name-only --color never \
+            | grep '^tests/[^_].*\.ts' \
+            | xargs -d '\n' ls -1df 2>/dev/null \
+            | cut -d '/' -f 2 | cut -d '.' -f 1 \
+            | jq -cnR '[inputs]' \
+          )" >> $GITHUB_OUTPUT
+
+  run_changed_tests:
+    if: (${{ github.event.number }} && ${{needs.find_changed_testfiles.outputs.changed}} )
+    runs-on: ubuntu-latest
+    needs: [ci, find_changed_testfiles]
+    timeout-minutes: 30
+    strategy:
+      matrix:
+        suite: ${{fromJson(needs.find_changed_testfiles.outputs.changed)}}
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 18
+      - run: corepack enable
+      - run: pnpm --version
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 18
+          cache: "pnpm"
+          cache-dependency-path: "**/pnpm-lock.yaml"
+      - uses: denoland/setup-deno@v1
+        with:
+          deno-version: v1.x
+        id: setup-deno
+        continue-on-error: true
+      - run: pnpm i --frozen-lockfile
+      - run: pnpm tsx ecosystem-ci.ts ${{ matrix.suite }}