fix #134 - support 'env' context in steps

pkg/runner/expression.go

@@ -13,6 +13,7 @@ import (
 
 	"github.com/robertkrimen/otto"
 	"github.com/sirupsen/logrus"
+	log "github.com/sirupsen/logrus"
 	"gopkg.in/godo.v2/glob"
 )
 
@@ -240,6 +241,7 @@ func (rc *RunContext) vmGithub() func(*otto.Otto) {
 
 func (sc *StepContext) vmEnv() func(*otto.Otto) {
 	return func(vm *otto.Otto) {
+		log.Debugf("context env => %v", sc.Env)
 		_ = vm.Set("env", sc.Env)
 	}
 }

pkg/runner/run_context.go

@@ -193,6 +193,8 @@ func (rc *RunContext) newStepExecutor(step *model.Step) common.Executor {
 			Success: true,
 			Outputs: make(map[string]string),
 		}
+
+		sc.setupEnv()(ctx)
 		rc.ExprEval = sc.NewExpressionEvaluator()
 
 		if !rc.EvalBool(sc.Step.If) {

pkg/runner/step_context.go

@@ -38,21 +38,18 @@ func (sc *StepContext) Executor() common.Executor {
 	switch step.Type() {
 	case model.StepTypeRun:
 		return common.NewPipelineExecutor(
-			sc.setupEnv(),
 			sc.setupShellCommand(),
 			sc.execJobContainer(),
 		)
 
 	case model.StepTypeUsesDockerURL:
 		return common.NewPipelineExecutor(
-			sc.setupEnv(),
 			sc.runUsesContainer(),
 		)
 
 	case model.StepTypeUsesActionLocal:
 		actionDir := filepath.Join(rc.Config.Workdir, step.Uses)
 		return common.NewPipelineExecutor(
-			sc.setupEnv(),
 			sc.setupAction(actionDir, ""),
 			sc.runAction(actionDir, ""),
 		)
@@ -72,7 +69,6 @@ func (sc *StepContext) Executor() common.Executor {
 				Ref: remoteAction.Ref,
 				Dir: actionDir,
 			}),
-			sc.setupEnv(),
 			sc.setupAction(actionDir, remoteAction.Path),
 			sc.runAction(actionDir, remoteAction.Path),
 		)
@@ -98,6 +94,7 @@ func (sc *StepContext) setupEnv() common.Executor {
 			env[k] = rc.ExprEval.Interpolate(v)
 		}
 		sc.Env = rc.withGithubEnv(env)
+		log.Debugf("setupEnv => %v", sc.Env)
 		return nil
 	}
 }

pkg/runner/testdata/basic/push.yml

@@ -1,10 +1,19 @@
 name: basic
 on: push
 
+env:
+  TEST: value
+
 jobs:
   check:
     runs-on: ubuntu-latest
     steps:
+      - run: echo ${{ env.TEST }} | grep value
+      - run: env
+      - uses: docker://alpine:3.8
+        with:
+          somekey: ${{ env.TEST }}
+          args: echo ${INPUT_SOMEKEY} | grep somevalue
       - run: ls
       - run: echo 'hello world' 
       - run: echo ${GITHUB_SHA} >> /github/sha.txt