ci[patch]: fix unit-tests-integrations by implementing dynamic matrix strategy. (#5768)

* patch matrix strategy- run unit test cases of only changed

* add clarification for job skip

* add firestore int

* check workflow

* Revert "Google firestore vectorstore"

---------

Co-authored-by: Brace Sproul <braceasproul@gmail.com>

Author: rameshkrishna

.github/workflows/unit-tests-integrations.yml

@@ -41,22 +41,47 @@ jobs:
           git diff --name-only -r HEAD^1 HEAD | while read line; do printf "%s\n" "$line"; done >> $GITHUB_OUTPUT
           echo "EOF" >> $GITHUB_OUTPUT
 
+  prepare-matrix:
+    needs: get-changed-files
+    runs-on: ubuntu-latest
+    env:
+      PACKAGES: "anthropic,azure-openai,cloudflare,cohere,core,community,exa,google-common,google-gauth,google-genai,google-vertexai,google-vertexai-web,google-webauth,groq,mistralai,mongo,nomic,openai,pinecone,qdrant,redis,textsplitters,weaviate,yandex"
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+    steps:
+      - id: set-matrix
+        run: |
+          changed_files="${{ needs.get-changed-files.outputs.changed_files }}"
+          echo "Changed files: $changed_files"
+          # Convert PACKAGES environment variable into an array
+          IFS=',' read -r -a packages <<< "$PACKAGES"
+          echo "Packages: ${packages[*]}"
+          matrix="{\"include\": ["
+          first_entry=true
+          for package in "${packages[@]}"; do
+            echo "Checking package: $package"
+            if echo "$changed_files" | grep -q "$package"; then
+              echo "Package $package found in changed files."
+              if [ "$first_entry" = true ]; then
+              matrix="$matrix{\"os\": \"ubuntu-latest\", \"node-version\": \"18\", \"package\": \"$package\"},{\"os\": \"ubuntu-latest\", \"node-version\": \"20\", \"package\": \"$package\"}"
+              first_entry=false
+            else
+              matrix="$matrix, {\"os\": \"ubuntu-latest\", \"node-version\": \"18\", \"package\": \"$package\"},{\"os\": \"ubuntu-latest\", \"node-version\": \"20\", \"package\": \"$package\"}"
+            fi
+            fi
+          done
+          matrix="$matrix]}"
+          echo "Matrix: $matrix"
+          echo "matrix=$matrix" >> $GITHUB_OUTPUT
+
   unit-tests:
     name: Unit Tests
-    needs: get-changed-files
+    needs: prepare-matrix
+    # Only run this job if there are packages to test
+    if: ${{ fromJson(needs.prepare-matrix.outputs.matrix).include.length != 0 }}
+    runs-on: ubuntu-latest
     strategy:
-      matrix:
-        os: [ubuntu-latest]
-        node-version: [18.x, 20.x]
-        package: [anthropic, azure-openai, cloudflare, cohere, community, exa, google-common, google-gauth, google-genai, google-vertexai, google-vertexai-web, google-webauth, groq, mistralai, mongo, nomic, openai, pinecone, qdrant, redis, textsplitters, weaviate, yandex]
-        # See Node.js release schedule at https://nodejs.org/en/about/releases/
-        # include:
-          # - os: windows-latest
-          #   node-version: 20.x
-          # - os: macos-latest
-          #   node-version: 20.x
-    runs-on: ${{ matrix.os }}
-    if: contains(needs.get-changed-files.outputs.changed_files, 'langchain-core/') || contains(needs.get-changed-files.outputs.changed_files, 'libs/langchain-${{ matrix.package }}/')
+      matrix: ${{ fromJson(needs.prepare-matrix.outputs.matrix) }}
     env:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"