Run other workflows after the Nix build has completed.

.github/workflows/benchmarks.yaml

@@ -1,4 +1,9 @@
-on: [push]
+on:
+  workflow_run:
+    workflows:
+      - nix build
+    types:
+      - completed
 
 name: Postgres NDC component benchmarks
 

.github/workflows/e2e-test.yaml

@@ -1,7 +1,11 @@
 name: E2E release compatibility
 
 on:
-  push:
+  workflow_run:
+    workflows:
+      - nix build
+    types:
+      - completed
     branches:
       - main
 
@@ -16,37 +20,19 @@ jobs:
       # pull requests create a new merge commit so we have to work our way back
       # to the actual commit so it matches the Docker image
       - name: Generate short SHA
+        id: short-git-hash
         run: |
           if [ "$GITHUB_EVENT_NAME" == "pull_request" ]; then
             GITHUB_SHA=$(cat $GITHUB_EVENT_PATH | jq -r .pull_request.head.sha)
           fi
           echo "hash=$(git rev-parse --short=9 "$GITHUB_SHA")" >> $GITHUB_OUTPUT
-        id: short-git-hash
-
-      - name: Wait for Docker image to be created
-        uses: lewagon/[email protected]
-        with:
-          ref: "${{ github.event.pull_request.head.sha || github.sha }}"
-          check-name: "build and deploy (ndc-postgres)"
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Dispatch E2E tests
-        uses: aurelien-baudet/workflow-dispatch@v2
+        uses: benc-uk/workflow-dispatch@v1.2.2
         id: workflow_dispatch
         with:
-          inputs: '{ "connector": "${{ steps.short-git-hash.outputs.hash }}" }'
           repo: hasura/v3-e2e-testing
           ref: main
-          token: ${{ secrets.E2E_WORKFLOW_PAT }}
           workflow: "cargo test postgres"
-
-      - name: Report failures
-        if: always() && github.ref == 'refs/heads/main'
-        uses: ravsamhq/notify-slack-action@v2
-        with:
-          status: ${{ job.status }}
-          notify_when: failure
-          notification_title: "${{ github.event.head_commit.author.name }}, *saddle up*! The following commit to <{repo_url}|{repo}> broke the end-to-end tests:"
-          message_format: "${{ github.event.head_commit.message }}"
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.BROKEN_BUILD_SLACK_WEBHOOK_URL }}
+          inputs: '{"connector": "${{ steps.short-git-hash.outputs.hash }}"}'
+          token: ${{ secrets.E2E_WORKFLOW_PAT }}