add main build call and update metric

Author: ezhang6811

.github/workflows/main-build.yml

@@ -1,5 +1,15 @@
 name: Java Agent Main Build
 on:
+  workflow_call:
+    inputs:
+      caller-workflow-name:
+        required: true
+        type: string
+      ref:
+        description: 'The branch, tag or SHA to checkout'
+        required: false
+        type: string
+        default: ''
   push:
     branches:
       - main
@@ -24,6 +34,8 @@ jobs:
     runs-on: aws-otel-java-instrumentation_ubuntu-latest_32-core
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 #v5.0.0
+        with:
+          ref: ${{ inputs.ref || github.sha }}
       - uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 #v5.0.0
         with:
           java-version-file: .java-version
@@ -58,6 +70,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 #v5.0.0
         with:
           fetch-depth: 0
+          ref: ${{ inputs.ref || github.sha }}
       - uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 #v5.0.0
         with:
           java-version-file: .java-version
@@ -193,6 +206,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 #v5.0.0
         with:
           fetch-depth: 0
+          ref: ${{ inputs.ref || github.sha }}
       - uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 #v5.0.0
         with:
           java-version: 23
@@ -233,6 +247,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 #v5.0.0
         with:
           fetch-depth: 0
+          ref: ${{ inputs.ref || github.sha }}
       - uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 #v5.0.0
         with:
           java-version-file: .java-version

.github/workflows/nightly-build.yml

@@ -98,9 +98,18 @@ jobs:
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
+  build-and-test:
+    needs: update-and-create-pr
+    if: needs.update-and-create-pr.outputs.has_changes == 'true'
+    uses: ./.github/workflows/main-build.yml
+    secrets: inherit
+    with:
+      caller-workflow-name: nightly-build
+      ref: nightly-dependency-updates
+
   publish-nightly-build-status:
     name: "Publish Nightly Build Status"
-    needs: [update-and-create-pr]
+    needs: [update-and-create-pr, build-and-test]
     runs-on: ubuntu-latest
     if: always()
     steps:
@@ -112,9 +121,12 @@ jobs:
 
       - name: Publish nightly build status
         run: |
-          # For now, just publish success since we don't have build validation yet
-          value="${{ needs.update-and-create-pr.result == 'success' && '0.0' || '1.0'}}"
-          aws cloudwatch put-metric-data --namespace 'ADOT/GitHubActions' \
-            --metric-name Failure \
-            --dimensions repository=${{ github.repository }},branch=${{ github.ref_name }},workflow=nightly_build \
-            --value $value
+          if [[ "${{ needs.build-and-test.result }}" == "skipped" ]]; then
+            echo "Build was skipped (no changes), not publishing metric"
+          else
+            value="${{ needs.build-and-test.result == 'success' && '0.0' || '1.0'}}"
+            aws cloudwatch put-metric-data --namespace 'ADOT/GitHubActions' \
+              --metric-name Failure \
+              --dimensions repository=${{ github.repository }},branch=${{ github.ref_name }},workflow=nightly_build \
+              --value $value
+          fi