323 lines
9.1 KiB
Go
323 lines
9.1 KiB
Go
package runner
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import (
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"context"
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"fmt"
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"path"
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"strconv"
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"strings"
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"time"
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"github.com/nektos/act/pkg/common"
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"github.com/nektos/act/pkg/container"
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"github.com/nektos/act/pkg/exprparser"
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"github.com/nektos/act/pkg/model"
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)
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type step interface {
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pre() common.Executor
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main() common.Executor
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post() common.Executor
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getRunContext() *RunContext
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getGithubContext(ctx context.Context) *model.GithubContext
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getStepModel() *model.Step
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getEnv() *map[string]string
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getIfExpression(context context.Context, stage stepStage) string
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}
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type stepStage int
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const (
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stepStagePre stepStage = iota
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stepStageMain
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stepStagePost
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)
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// Controls how many symlinks are resolved for local and remote Actions
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const maxSymlinkDepth = 10
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func (s stepStage) String() string {
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switch s {
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case stepStagePre:
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return "Pre"
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case stepStageMain:
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return "Main"
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case stepStagePost:
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return "Post"
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}
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return "Unknown"
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}
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func processRunnerEnvFileCommand(ctx context.Context, fileName string, rc *RunContext, setter func(context.Context, map[string]string, string)) error {
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env := map[string]string{}
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err := rc.JobContainer.UpdateFromEnv(path.Join(rc.JobContainer.GetActPath(), fileName), &env)(ctx)
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if err != nil {
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return err
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}
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for k, v := range env {
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setter(ctx, map[string]string{"name": k}, v)
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}
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return nil
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}
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func runStepExecutor(step step, stage stepStage, executor common.Executor) common.Executor {
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return func(ctx context.Context) error {
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logger := common.Logger(ctx)
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rc := step.getRunContext()
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stepModel := step.getStepModel()
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ifExpression := step.getIfExpression(ctx, stage)
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rc.CurrentStep = stepModel.ID
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stepResult := &model.StepResult{
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Outcome: model.StepStatusSuccess,
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Conclusion: model.StepStatusSuccess,
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Outputs: make(map[string]string),
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}
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if stage == stepStageMain {
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rc.StepResults[rc.CurrentStep] = stepResult
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}
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err := setupEnv(ctx, step)
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if err != nil {
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return err
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}
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runStep, err := isStepEnabled(ctx, ifExpression, step, stage)
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if err != nil {
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stepResult.Conclusion = model.StepStatusFailure
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stepResult.Outcome = model.StepStatusFailure
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return err
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}
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if !runStep {
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stepResult.Conclusion = model.StepStatusSkipped
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stepResult.Outcome = model.StepStatusSkipped
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logger.WithField("stepResult", stepResult.Outcome).Debugf("Skipping step '%s' due to '%s'", stepModel, ifExpression)
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return nil
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}
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stepString := rc.ExprEval.Interpolate(ctx, stepModel.String())
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if strings.Contains(stepString, "::add-mask::") {
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stepString = "add-mask command"
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}
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logger.Infof("\u2B50 Run %s %s", stage, stepString)
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// Prepare and clean Runner File Commands
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actPath := rc.JobContainer.GetActPath()
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outputFileCommand := path.Join("workflow", "outputcmd.txt")
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(*step.getEnv())["GITHUB_OUTPUT"] = path.Join(actPath, outputFileCommand)
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stateFileCommand := path.Join("workflow", "statecmd.txt")
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(*step.getEnv())["GITHUB_STATE"] = path.Join(actPath, stateFileCommand)
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pathFileCommand := path.Join("workflow", "pathcmd.txt")
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(*step.getEnv())["GITHUB_PATH"] = path.Join(actPath, pathFileCommand)
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envFileCommand := path.Join("workflow", "envs.txt")
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(*step.getEnv())["GITHUB_ENV"] = path.Join(actPath, envFileCommand)
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summaryFileCommand := path.Join("workflow", "SUMMARY.md")
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(*step.getEnv())["GITHUB_STEP_SUMMARY"] = path.Join(actPath, summaryFileCommand)
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_ = rc.JobContainer.Copy(actPath, &container.FileEntry{
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Name: outputFileCommand,
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Mode: 0o666,
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}, &container.FileEntry{
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Name: stateFileCommand,
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Mode: 0o666,
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}, &container.FileEntry{
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Name: pathFileCommand,
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Mode: 0o666,
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}, &container.FileEntry{
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Name: envFileCommand,
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Mode: 0666,
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}, &container.FileEntry{
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Name: summaryFileCommand,
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Mode: 0o666,
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})(ctx)
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timeoutctx, cancelTimeOut := evaluateStepTimeout(ctx, rc.ExprEval, stepModel)
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defer cancelTimeOut()
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err = executor(timeoutctx)
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if err == nil {
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logger.WithField("stepResult", stepResult.Outcome).Infof(" \u2705 Success - %s %s", stage, stepString)
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} else {
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stepResult.Outcome = model.StepStatusFailure
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continueOnError, parseErr := isContinueOnError(ctx, stepModel.RawContinueOnError, step, stage)
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if parseErr != nil {
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stepResult.Conclusion = model.StepStatusFailure
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return parseErr
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}
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if continueOnError {
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logger.Infof("Failed but continue next step")
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err = nil
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stepResult.Conclusion = model.StepStatusSuccess
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} else {
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stepResult.Conclusion = model.StepStatusFailure
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}
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logger.WithField("stepResult", stepResult.Outcome).Errorf(" \u274C Failure - %s %s", stage, stepString)
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}
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// Process Runner File Commands
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orgerr := err
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err = processRunnerEnvFileCommand(ctx, envFileCommand, rc, rc.setEnv)
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if err != nil {
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return err
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}
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err = processRunnerEnvFileCommand(ctx, stateFileCommand, rc, rc.saveState)
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if err != nil {
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return err
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}
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err = processRunnerEnvFileCommand(ctx, outputFileCommand, rc, rc.setOutput)
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if err != nil {
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return err
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}
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err = rc.UpdateExtraPath(ctx, path.Join(actPath, pathFileCommand))
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if err != nil {
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return err
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}
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if orgerr != nil {
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return orgerr
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}
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return err
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}
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}
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func evaluateStepTimeout(ctx context.Context, exprEval ExpressionEvaluator, stepModel *model.Step) (context.Context, context.CancelFunc) {
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timeout := exprEval.Interpolate(ctx, stepModel.TimeoutMinutes)
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if timeout != "" {
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if timeOutMinutes, err := strconv.ParseInt(timeout, 10, 64); err == nil {
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return context.WithTimeout(ctx, time.Duration(timeOutMinutes)*time.Minute)
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}
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}
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return ctx, func() {}
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}
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func setupEnv(ctx context.Context, step step) error {
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rc := step.getRunContext()
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mergeEnv(ctx, step)
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// merge step env last, since it should not be overwritten
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mergeIntoMap(step, step.getEnv(), step.getStepModel().GetEnv())
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exprEval := rc.NewExpressionEvaluator(ctx)
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for k, v := range *step.getEnv() {
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if !strings.HasPrefix(k, "INPUT_") {
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(*step.getEnv())[k] = exprEval.Interpolate(ctx, v)
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}
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}
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// after we have an evaluated step context, update the expressions evaluator with a new env context
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// you can use step level env in the with property of a uses construct
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exprEval = rc.NewExpressionEvaluatorWithEnv(ctx, *step.getEnv())
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for k, v := range *step.getEnv() {
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if strings.HasPrefix(k, "INPUT_") {
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(*step.getEnv())[k] = exprEval.Interpolate(ctx, v)
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}
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}
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common.Logger(ctx).Debugf("setupEnv => %v", *step.getEnv())
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return nil
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}
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func mergeEnv(ctx context.Context, step step) {
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env := step.getEnv()
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rc := step.getRunContext()
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job := rc.Run.Job()
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c := job.Container()
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if c != nil {
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mergeIntoMap(step, env, rc.GetEnv(), c.Env)
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} else {
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mergeIntoMap(step, env, rc.GetEnv())
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}
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rc.withGithubEnv(ctx, step.getGithubContext(ctx), *env)
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}
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func isStepEnabled(ctx context.Context, expr string, step step, stage stepStage) (bool, error) {
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rc := step.getRunContext()
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var defaultStatusCheck exprparser.DefaultStatusCheck
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if stage == stepStagePost {
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defaultStatusCheck = exprparser.DefaultStatusCheckAlways
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} else {
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defaultStatusCheck = exprparser.DefaultStatusCheckSuccess
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}
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runStep, err := EvalBool(ctx, rc.NewStepExpressionEvaluator(ctx, step), expr, defaultStatusCheck)
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if err != nil {
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return false, fmt.Errorf(" \u274C Error in if-expression: \"if: %s\" (%s)", expr, err)
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}
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return runStep, nil
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}
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func isContinueOnError(ctx context.Context, expr string, step step, _ stepStage) (bool, error) {
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// https://github.com/github/docs/blob/3ae84420bd10997bb5f35f629ebb7160fe776eae/content/actions/reference/workflow-syntax-for-github-actions.md?plain=true#L962
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if len(strings.TrimSpace(expr)) == 0 {
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return false, nil
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}
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rc := step.getRunContext()
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continueOnError, err := EvalBool(ctx, rc.NewStepExpressionEvaluator(ctx, step), expr, exprparser.DefaultStatusCheckNone)
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if err != nil {
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return false, fmt.Errorf(" \u274C Error in continue-on-error-expression: \"continue-on-error: %s\" (%s)", expr, err)
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}
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return continueOnError, nil
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}
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func mergeIntoMap(step step, target *map[string]string, maps ...map[string]string) {
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if rc := step.getRunContext(); rc != nil && rc.JobContainer != nil && rc.JobContainer.IsEnvironmentCaseInsensitive() {
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mergeIntoMapCaseInsensitive(*target, maps...)
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} else {
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mergeIntoMapCaseSensitive(*target, maps...)
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}
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}
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func mergeIntoMapCaseSensitive(target map[string]string, maps ...map[string]string) {
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for _, m := range maps {
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for k, v := range m {
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target[k] = v
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}
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}
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}
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func mergeIntoMapCaseInsensitive(target map[string]string, maps ...map[string]string) {
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foldKeys := make(map[string]string, len(target))
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for k := range target {
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foldKeys[strings.ToLower(k)] = k
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}
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toKey := func(s string) string {
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foldKey := strings.ToLower(s)
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if k, ok := foldKeys[foldKey]; ok {
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return k
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}
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foldKeys[strings.ToLower(foldKey)] = s
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return s
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}
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for _, m := range maps {
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for k, v := range m {
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target[toKey(k)] = v
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}
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}
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}
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func symlinkJoin(filename, sym, parent string) (string, error) {
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dir := path.Dir(filename)
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dest := path.Join(dir, sym)
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prefix := path.Clean(parent) + "/"
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if strings.HasPrefix(dest, prefix) || prefix == "./" {
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return dest, nil
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}
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return "", fmt.Errorf("symlink tries to access file '%s' outside of '%s'", strings.ReplaceAll(dest, "'", "''"), strings.ReplaceAll(parent, "'", "''"))
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}
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