setup/evaluate env context after setup steps context. (#309)

Author: TingluoHuang

src/Runner.Worker/StepsRunner.cs

@@ -76,38 +76,38 @@ public async Task RunAsync(IExecutionContext jobContext)
                 // Start
                 step.ExecutionContext.Start();
 
-                // Populate env context for each step
-                Trace.Info("Initialize Env context for step");
+                // Initialize scope
+                if (InitializeScope(step, scopeInputs))
+                {
+                    // Populate env context for each step
+                    Trace.Info("Initialize Env context for step");
 #if OS_WINDOWS
-                var envContext = new DictionaryContextData();
+                    var envContext = new DictionaryContextData();
 #else
-                var envContext = new CaseSensitiveDictionaryContextData();
+                    var envContext = new CaseSensitiveDictionaryContextData();
 #endif
-                step.ExecutionContext.ExpressionValues["env"] = envContext;
-                foreach (var pair in step.ExecutionContext.EnvironmentVariables)
-                {
-                    envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
-                }
+                    step.ExecutionContext.ExpressionValues["env"] = envContext;
+                    foreach (var pair in step.ExecutionContext.EnvironmentVariables)
+                    {
+                        envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
+                    }
 
-                if (step is IActionRunner actionStep)
-                {
-                    // Set GITHUB_ACTION
-                    step.ExecutionContext.SetGitHubContext("action", actionStep.Action.Name);
-
-                    // Evaluate and merge action's env block to env context
-                    var templateTrace = step.ExecutionContext.ToTemplateTraceWriter();
-                    var schema = new PipelineTemplateSchemaFactory().CreateSchema();
-                    var templateEvaluator = new PipelineTemplateEvaluator(templateTrace, schema);
-                    var actionEnvironment = templateEvaluator.EvaluateStepEnvironment(actionStep.Action.Environment, step.ExecutionContext.ExpressionValues, VarUtil.EnvironmentVariableKeyComparer);
-                    foreach (var env in actionEnvironment)
+                    if (step is IActionRunner actionStep)
                     {
-                        envContext[env.Key] = new StringContextData(env.Value ?? string.Empty);
+                        // Set GITHUB_ACTION
+                        step.ExecutionContext.SetGitHubContext("action", actionStep.Action.Name);
+
+                        // Evaluate and merge action's env block to env context
+                        var templateTrace = step.ExecutionContext.ToTemplateTraceWriter();
+                        var schema = new PipelineTemplateSchemaFactory().CreateSchema();
+                        var templateEvaluator = new PipelineTemplateEvaluator(templateTrace, schema);
+                        var actionEnvironment = templateEvaluator.EvaluateStepEnvironment(actionStep.Action.Environment, step.ExecutionContext.ExpressionValues, VarUtil.EnvironmentVariableKeyComparer);
+                        foreach (var env in actionEnvironment)
+                        {
+                            envContext[env.Key] = new StringContextData(env.Value ?? string.Empty);
+                        }
                     }
-                }
 
-                // Initialize scope
-                if (InitializeScope(step, scopeInputs))
-                {
                     var expressionManager = HostContext.GetService<IExpressionManager>();
                     try
                     {