Don't interpolate joboutputs, before job is done (#894)

* Don't interpolate joboutputs, before job is donei

All credits go to @ChristopherHX which fixed this issue.
I only created a PR for this so it will be fixed in the upstream binary.

This fixes #758

* Added output test

* Fix typo

pkg/runner/run_context.go

@@ -210,6 +210,20 @@ func (rc *RunContext) ActionCacheDir() string {
 	return filepath.Join(xdgCache, "act")
 }
 
+// Interpolate outputs after a job is done
+func (rc *RunContext) interpolateOutputs() common.Executor {
+	return func(ctx context.Context) error {
+		ee := rc.NewExpressionEvaluator()
+		for k, v := range rc.Run.Job().Outputs {
+			interpolated := ee.Interpolate(v)
+			if v != interpolated {
+				rc.Run.Job().Outputs[k] = interpolated
+			}
+		}
+		return nil
+	}
+}
+
 // Executor returns a pipeline executor for all the steps in the job
 func (rc *RunContext) Executor() common.Executor {
 	steps := make([]common.Executor, 0)
@@ -231,7 +245,7 @@ func (rc *RunContext) Executor() common.Executor {
 	}
 	steps = append(steps, rc.stopJobContainer())
 
-	return common.NewPipelineExecutor(steps...).Finally(func(ctx context.Context) error {
+	return common.NewPipelineExecutor(steps...).Finally(rc.interpolateOutputs()).Finally(func(ctx context.Context) error {
 		if rc.JobContainer != nil {
 			return rc.JobContainer.Close()(ctx)
 		}
@@ -275,7 +289,7 @@ func (rc *RunContext) newStepExecutor(step *model.Step) common.Executor {
 		rc.ExprEval = exprEval
 
 		common.Logger(ctx).Infof("\u2B50  Run %s", sc.Step)
-		err = sc.Executor().Then(sc.interpolateOutputs())(ctx)
+		err = sc.Executor()(ctx)
 		if err == nil {
 			common.Logger(ctx).Infof("  \u2705  Success - %s", sc.Step)
 		} else {

pkg/runner/runner_test.go

@@ -120,6 +120,7 @@ func TestRunEvent(t *testing.T) {
 		{"testdata", "issue-597", "push", "", platforms, ""},
 		{"testdata", "issue-598", "push", "", platforms, ""},
 		{"testdata", "env-and-path", "push", "", platforms, ""},
+		{"testdata", "outputs", "push", "", platforms, ""},
 		{"../model/testdata", "strategy", "push", "", platforms, ""}, // TODO: move all testdata into pkg so we can validate it with planner and runner
 		// {"testdata", "issue-228", "push", "", platforms, ""}, // TODO [igni]: Remove this once everything passes
 

pkg/runner/step_context.go

@@ -39,19 +39,6 @@ func (sc *StepContext) execJobContainer() common.Executor {
 	}
 }
 
-func (sc *StepContext) interpolateOutputs() common.Executor {
-	return func(ctx context.Context) error {
-		ee := sc.NewExpressionEvaluator()
-		for k, v := range sc.RunContext.Run.Job().Outputs {
-			interpolated := ee.Interpolate(v)
-			if v != interpolated {
-				sc.RunContext.Run.Job().Outputs[k] = interpolated
-			}
-		}
-		return nil
-	}
-}
-
 type formatError string
 
 func (e formatError) Error() string {

pkg/runner/testdata/outputs/push.yml

@@ -0,0 +1,43 @@
+name: output
+on: push
+
+jobs:
+  build_output:
+    runs-on: ubuntu-latest
+    steps:
+    - id: set_1
+      run: |
+        echo "::set-output name=var_1::$(echo var1)"
+        echo "::set-output name=var_2::$(echo var2)"
+    - id: set_2
+      run: |
+        echo "::set-output name=var_3::$(echo var3)"
+    - id: set_3
+      run: |
+        echo "::set-output name=var_4::$(echo var4)"
+    outputs:
+      variable_1: ${{ steps.set_1.outputs.var_1 }}
+      variable_2: ${{ steps.set_1.outputs.var_2 }}
+      variable_3: ${{ steps.set_2.outputs.var_3 }}
+      variable_4: ${{ steps.set_3.outputs.var_4 }}
+
+  build:
+    needs: build_output
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check set_1 var1
+        run: |
+          echo "${{ needs.build_output.outputs.variable_1 }}"
+          echo "${{ needs.build_output.outputs.variable_1 }}" | grep 'var1' || exit 1
+      - name: Check set_1 var2
+        run: |
+          echo "${{ needs.build_output.outputs.variable_2 }}"
+          echo "${{ needs.build_output.outputs.variable_2 }}" | grep 'var2' || exit 1
+      - name: Check set_2 var3
+        run: |
+          echo "${{ needs.build_output.outputs.variable_3 }}"
+          echo "${{ needs.build_output.outputs.variable_3 }}" | grep 'var3' || exit 1
+      - name: Check set_3 var4
+        run: |
+          echo "${{ needs.build_output.outputs.variable_4 }}"
+          echo "${{ needs.build_output.outputs.variable_4 }}" | grep 'var4' || exit 1