package runner import ( "context" "encoding/json" "fmt" "os" log "github.com/sirupsen/logrus" "github.com/nektos/act/pkg/common" "github.com/nektos/act/pkg/container" "github.com/nektos/act/pkg/model" ) // Runner provides capabilities to run GitHub actions type Runner interface { NewPlanExecutor(plan *model.Plan) common.Executor } // Config contains the config for a new runner type Config struct { Actor string // the user that triggered the event Workdir string // path to working directory BindWorkdir bool // bind the workdir to the job container EventName string // name of event to run EventPath string // path to JSON file to use for event.json in containers DefaultBranch string // name of the main branch for this repository ReuseContainers bool // reuse containers to maintain state ForcePull bool // force pulling of the image, even if already present ForceRebuild bool // force rebuilding local docker image action LogOutput bool // log the output from docker run JSONLogger bool // use json or text logger Env map[string]string // env for containers Inputs map[string]string // manually passed action inputs Secrets map[string]string // list of secrets Token string // GitHub token InsecureSecrets bool // switch hiding output when printing to terminal Platforms map[string]string // list of platforms Privileged bool // use privileged mode UsernsMode string // user namespace to use ContainerArchitecture string // Desired OS/architecture platform for running containers ContainerDaemonSocket string // Path to Docker daemon socket ContainerOptions string // Options for the job container UseGitIgnore bool // controls if paths in .gitignore should not be copied into container, default true GitHubInstance string // GitHub instance to use, default "github.com" ContainerCapAdd []string // list of kernel capabilities to add to the containers ContainerCapDrop []string // list of kernel capabilities to remove from the containers AutoRemove bool // controls if the container is automatically removed upon workflow completion ArtifactServerPath string // the path where the artifact server stores uploads ArtifactServerAddr string // the address the artifact server binds to ArtifactServerPort string // the port the artifact server binds to NoSkipCheckout bool // do not skip actions/checkout RemoteName string // remote name in local git repo config ReplaceGheActionWithGithubCom []string // Use actions from GitHub Enterprise instance to GitHub ReplaceGheActionTokenWithGithubCom string // Token of private action repo on GitHub. Matrix map[string]map[string]bool // Matrix config to run } type caller struct { runContext *RunContext } type runnerImpl struct { config *Config eventJSON string caller *caller // the job calling this runner (caller of a reusable workflow) } // New Creates a new Runner func New(runnerConfig *Config) (Runner, error) { runner := &runnerImpl{ config: runnerConfig, } return runner.configure() } func (runner *runnerImpl) configure() (Runner, error) { runner.eventJSON = "{}" if runner.config.EventPath != "" { log.Debugf("Reading event.json from %s", runner.config.EventPath) eventJSONBytes, err := os.ReadFile(runner.config.EventPath) if err != nil { return nil, err } runner.eventJSON = string(eventJSONBytes) } else if len(runner.config.Inputs) != 0 { eventMap := map[string]map[string]string{ "inputs": runner.config.Inputs, } eventJSON, err := json.Marshal(eventMap) if err != nil { return nil, err } runner.eventJSON = string(eventJSON) } return runner, nil } // NewPlanExecutor ... func (runner *runnerImpl) NewPlanExecutor(plan *model.Plan) common.Executor { maxJobNameLen := 0 stagePipeline := make([]common.Executor, 0) for i := range plan.Stages { stage := plan.Stages[i] stagePipeline = append(stagePipeline, func(ctx context.Context) error { pipeline := make([]common.Executor, 0) for _, run := range stage.Runs { stageExecutor := make([]common.Executor, 0) job := run.Job() if job.Strategy != nil { strategyRc := runner.newRunContext(ctx, run, nil) if err := strategyRc.NewExpressionEvaluator(ctx).EvaluateYamlNode(ctx, &job.Strategy.RawMatrix); err != nil { log.Errorf("Error while evaluating matrix: %v", err) } } matrixes := selectMatrixes(job.GetMatrixes(), runner.config.Matrix) log.Debugf("Final matrix after applying user inclusions '%v'", matrixes) maxParallel := 4 if job.Strategy != nil { maxParallel = job.Strategy.MaxParallel } if len(matrixes) < maxParallel { maxParallel = len(matrixes) } for i, matrix := range matrixes { matrix := matrix rc := runner.newRunContext(ctx, run, matrix) rc.JobName = rc.Name if len(matrixes) > 1 { rc.Name = fmt.Sprintf("%s-%d", rc.Name, i+1) } if len(rc.String()) > maxJobNameLen { maxJobNameLen = len(rc.String()) } stageExecutor = append(stageExecutor, func(ctx context.Context) error { jobName := fmt.Sprintf("%-*s", maxJobNameLen, rc.String()) return rc.Executor()(common.WithJobErrorContainer(WithJobLogger(ctx, rc.Run.JobID, jobName, rc.Config, &rc.Masks, matrix))) }) } pipeline = append(pipeline, common.NewParallelExecutor(maxParallel, stageExecutor...)) } var ncpu int info, err := container.GetHostInfo(ctx) if err != nil { log.Errorf("failed to obtain container engine info: %s", err) ncpu = 1 // sane default? } else { ncpu = info.NCPU } return common.NewParallelExecutor(ncpu, pipeline...)(ctx) }) } return common.NewPipelineExecutor(stagePipeline...).Then(handleFailure(plan)) } func handleFailure(plan *model.Plan) common.Executor { return func(ctx context.Context) error { for _, stage := range plan.Stages { for _, run := range stage.Runs { if run.Job().Result == "failure" { return fmt.Errorf("Job '%s' failed", run.String()) } } } return nil } } func selectMatrixes(originalMatrixes []map[string]interface{}, targetMatrixValues map[string]map[string]bool) []map[string]interface{} { matrixes := make([]map[string]interface{}, 0) for _, original := range originalMatrixes { flag := true for key, val := range original { if allowedVals, ok := targetMatrixValues[key]; ok { valToString := fmt.Sprintf("%v", val) if _, ok := allowedVals[valToString]; !ok { flag = false } } } if flag { matrixes = append(matrixes, original) } } return matrixes } func (runner *runnerImpl) newRunContext(ctx context.Context, run *model.Run, matrix map[string]interface{}) *RunContext { rc := &RunContext{ Config: runner.config, Run: run, EventJSON: runner.eventJSON, StepResults: make(map[string]*model.StepResult), Matrix: matrix, caller: runner.caller, } rc.ExprEval = rc.NewExpressionEvaluator(ctx) rc.Name = rc.ExprEval.Interpolate(ctx, run.String()) return rc }