Made env interpolated instead of evaluated. (#1222)

* Made env interpolated instead of evaluated.

* [skip ci] Add Test Workflow file

* Activate Test

* fix Test

Co-authored-by: ChristopherHX <christopher.homberger@web.de>

pkg/runner/runner.go

@@ -14,7 +14,6 @@ import (
 
 	"github.com/nektos/act/pkg/common"
 	"github.com/nektos/act/pkg/container"
-	"github.com/nektos/act/pkg/exprparser"
 	"github.com/nektos/act/pkg/model"
 )
 
@@ -165,10 +164,7 @@ func (runner *runnerImpl) NewPlanExecutor(plan *model.Plan) common.Executor {
 					// evaluate environment variables since they can contain
 					// GitHub's special environment variables.
 					for k, v := range rc.GetEnv() {
-						valueEval, err := rc.ExprEval.evaluate(ctx, v, exprparser.DefaultStatusCheckNone)
-						if err == nil {
-							rc.Env[k] = fmt.Sprintf("%v", valueEval)
-						}
+						rc.Env[k] = rc.ExprEval.Interpolate(ctx, v)
 					}
 					if len(rc.String()) > maxJobNameLen {
 						maxJobNameLen = len(rc.String())

pkg/runner/runner_test.go

@@ -177,6 +177,7 @@ func TestRunEvent(t *testing.T) {
 		{workdir, "if-expressions", "push", "Job 'mytest' failed", platforms},
 		{workdir, "actions-environment-and-context-tests", "push", "", platforms},
 		{workdir, "uses-action-with-pre-and-post-step", "push", "", platforms},
+		{workdir, "evalenv", "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
 		{"../model/testdata", "container-volumes", "push", "", platforms},

pkg/runner/testdata/evalenv/push.yml

@@ -0,0 +1,21 @@
+name: CI
+
+on: push
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    env:
+      BUILD_DIR: ${{ github.workspace }}/build
+    steps:
+      - name: Dump
+        run: |
+          echo "$BUILD_DIR"
+          echo "$EXPECTED_BUILD_DIR"
+          echo "$GITHUB_WORKSPACE/build"
+        env:
+          EXPECTED_BUILD_DIR: ${{ github.workspace }}/build
+      - name: Test
+        run: |
+          [ "$BUILD_DIR" = "$EXPECTED_BUILD_DIR" ] && [ "$BUILD_DIR" = "$GITHUB_WORKSPACE/build" ]
+        env:
+          EXPECTED_BUILD_DIR: ${{ github.workspace }}/build