needs workflow

.github/workflows/needs.yml

@@ -0,0 +1,31 @@
+name: needs workflow
+
+on: push
+
+jobs: 
+    job2:
+        runs-on: ubuntu-latest
+        needs: job1
+        steps: 
+            - name: step 1
+              run: |
+                echo job2 step1 before error
+                echo "::error title=Job2 error title::Job2 error message"
+    job1:
+        runs-on: ubuntu-latest
+        steps:
+            - name: step1
+              run: echo job1 step1
+    job3:
+        runs-on: ubuntu-latest
+        needs: [job1, job2]
+        steps:
+            - name: step1
+              run: echo job3 step1
+    job4:
+        runs-on: ubuntu-latest
+        if: ${{ always() }}
+        needs: [job1, job2]
+        steps:
+            - name: step1
+              run: echo job4 step1