fix: fail the step or job whose expression cannot be interpolated (#1199)

An expression that failed to evaluate was logged and replaced by an empty string, so a `run:` step executed an empty script and reported success. The same swallow covered `shell:`, `working-directory:`, step `env:`, `with:`, `uses:`, the job's `env:`, `container:`, `services:`, `runs-on:` and outputs, and a called workflow's `with:` and `secrets:`. Every interpolation now propagates its error as actions/runner does: step-level values fail the step, job-level values fail the job at setup, `timeout-minutes` logs the error and runs unbounded, and a job or step name keeps its source text. `defaults.run` and a called workflow's inputs and secrets are resolved once at job setup with the job context rather than per step, and the job's image is resolved once, so host mode and `ImageOS` derive from the image the job started with. Closes https://gitea.com/gitea/runner/issues/392 Closes https://gitea.com/gitea/runner/issues/555 --------- Co-authored-by: silverwind <me@silverwind.io> Co-authored-by: silverwind <2021+silverwind@noreply.gitea.com> Reviewed-on: https://gitea.com/gitea/runner/pulls/1199 Reviewed-by: silverwind <2021+silverwind@noreply.gitea.com> Co-authored-by: bircni <bircni@icloud.com>
2026-09-21 19:37:07 +02:00 · 2026-09-03 10:43:04 +00:00
parent 7f53eca716
commit 1745c7c841
20 changed files with 495 additions and 290 deletions
@@ -7,6 +7,7 @@ package runner
 import (
 	"context"
 	"errors"
+	"fmt"
 	"regexp"
 	"slices"
 	"strconv"
@@ -17,7 +18,7 @@ import (
 	"gitea.dev/actionslib/pkg/model"
 )

-func evaluateCompositeInputAndEnv(ctx context.Context, parent *RunContext, step actionStep) map[string]string {
+func evaluateCompositeInputAndEnv(ctx context.Context, parent *RunContext, step actionStep) (map[string]string, error) {
 	env := make(map[string]string)
 	stepEnv := *step.getEnv()
 	for k, v := range stepEnv {
@@ -47,14 +48,17 @@ func evaluateCompositeInputAndEnv(ctx context.Context, parent *RunContext, step
 			env[envKey] = value
 		} else {
 			// defaults could contain expressions
-			env[envKey] = ee.Interpolate(ctx, input.Default)
+			var err error
+			if env[envKey], err = ee.Interpolate(ctx, input.Default); err != nil {
+				return nil, fmt.Errorf("unable to interpolate the default of input %s: %w", inputID, err)
+			}
 		}
 	}
 	gh := step.getGithubContext(ctx)
 	env["GITHUB_ACTION_REPOSITORY"] = gh.ActionRepository
 	env["GITHUB_ACTION_REF"] = gh.ActionRef

-	return env
+	return env, nil
 }

 func (rc *RunContext) setCompositeActionEnv(env map[string]string) {
@@ -66,8 +70,11 @@ func (rc *RunContext) setCompositeActionEnv(env map[string]string) {
 	}
 }

-func newCompositeRunContext(ctx context.Context, parent *RunContext, step actionStep, actionPath string) *RunContext {
-	env := evaluateCompositeInputAndEnv(ctx, parent, step)
+func newCompositeRunContext(ctx context.Context, parent *RunContext, step actionStep, actionPath string) (*RunContext, error) {
+	env, err := evaluateCompositeInputAndEnv(ctx, parent, step)
+	if err != nil {
+		return nil, err
+	}

 	// run with the global config but without secrets
 	configCopy := *parent.Config
@@ -87,20 +94,21 @@ func newCompositeRunContext(ctx context.Context, parent *RunContext, step action
 				},
 			},
 		},
-		Config:       &configCopy,
-		StepResults:  map[string]*model.StepResult{},
-		JobContainer: parent.JobContainer,
-		ActionPath:   actionPath,
-		GlobalEnv:    parent.GlobalEnv,
-		Masks:        parent.Masks,
-		ExtraPath:    parent.ExtraPath,
-		Parent:       parent,
-		EventJSON:    parent.EventJSON,
+		Config:        &configCopy,
+		StepResults:   map[string]*model.StepResult{},
+		JobContainer:  parent.JobContainer,
+		ActionPath:    actionPath,
+		GlobalEnv:     parent.GlobalEnv,
+		Masks:         parent.Masks,
+		ExtraPath:     parent.ExtraPath,
+		Parent:        parent,
+		EventJSON:     parent.EventJSON,
+		platformImage: parent.platformImage,
 	}
 	compositerc.setCompositeActionEnv(env)
 	compositerc.ExprEval = compositerc.NewExpressionEvaluator(ctx)

-	return compositerc
+	return compositerc, nil
 }

 // appendUniqueMasks appends the masks from src to dst, skipping any mask that
@@ -121,7 +129,10 @@ func execAsComposite(step actionStep) common.Executor {
 	action := step.getActionModel()

 	return func(ctx context.Context) error {
-		compositeRC := step.getCompositeRunContext(ctx)
+		compositeRC, err := step.getCompositeRunContext(ctx)
+		if err != nil {
+			return err
+		}

 		steps := step.getCompositeSteps()

@@ -131,14 +142,17 @@ func execAsComposite(step actionStep) common.Executor {

 		ctx = WithCompositeLogger(ctx, &compositeRC.Masks)

-		err := steps.main(ctx)
+		err = steps.main(ctx)

 		// Map outputs from composite RunContext to job RunContext
 		eval := compositeRC.NewExpressionEvaluator(ctx)
 		for outputName, output := range action.Outputs {
-			rc.setOutput(ctx, map[string]string{
-				"name": outputName,
-			}, eval.Interpolate(ctx, output.Value))
+			value, outputErr := eval.Interpolate(ctx, output.Value)
+			if outputErr != nil {
+				err = errors.Join(err, fmt.Errorf("unable to interpolate output %s: %w", outputName, outputErr))
+				continue
+			}
+			rc.setOutput(ctx, map[string]string{"name": outputName}, value)
 		}

 		// compositeRC.Masks is seeded with rc.Masks (see newCompositeRunContext)