refactor actions to improve testability

actions/action.go

@@ -0,0 +1,80 @@
+package actions
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"os"
+	"path/filepath"
+	"regexp"
+
+	"github.com/nektos/act/common"
+	log "github.com/sirupsen/logrus"
+)
+
+// imageURL is the directory where a `Dockerfile` should exist
+func parseImageLocal(workingDir string, contextDir string) (contextDirOut string, tag string, ok bool) {
+	if !filepath.IsAbs(contextDir) {
+		contextDir = filepath.Join(workingDir, contextDir)
+	}
+	if _, err := os.Stat(filepath.Join(contextDir, "Dockerfile")); os.IsNotExist(err) {
+		log.Debugf("Ignoring missing Dockerfile '%s/Dockerfile'", contextDir)
+		return "", "", false
+	}
+
+	sha, _, err := common.FindGitRevision(contextDir)
+	if err != nil {
+		log.Warnf("Unable to determine git revision: %v", err)
+		sha = "latest"
+	}
+	return contextDir, fmt.Sprintf("%s:%s", filepath.Base(contextDir), sha), true
+}
+
+// imageURL is the URL for a docker repo
+func parseImageReference(image string) (ref string, ok bool) {
+	imageURL, err := url.Parse(image)
+	if err != nil {
+		log.Debugf("Unable to parse image as url: %v", err)
+		return "", false
+	}
+	if imageURL.Scheme != "docker" {
+		log.Debugf("Ignoring non-docker ref '%s'", imageURL.String())
+		return "", false
+	}
+
+	return fmt.Sprintf("%s%s", imageURL.Host, imageURL.Path), true
+}
+
+// imageURL is the directory where a `Dockerfile` should exist
+func parseImageGithub(image string) (cloneURL *url.URL, ref string, path string, ok bool) {
+	re := regexp.MustCompile("^([^/@]+)/([^/@]+)(/([^@]*))?(@(.*))?$")
+	matches := re.FindStringSubmatch(image)
+
+	if matches == nil {
+		return nil, "", "", false
+	}
+
+	cloneURL, err := url.Parse(fmt.Sprintf("https://github.com/%s/%s", matches[1], matches[2]))
+	if err != nil {
+		log.Debugf("Unable to parse as URL: %v", err)
+		return nil, "", "", false
+	}
+
+	resp, err := http.Head(cloneURL.String())
+	if resp.StatusCode >= 400 || err != nil {
+		log.Debugf("Unable to HEAD URL %s status=%v err=%v", cloneURL.String(), resp.StatusCode, err)
+		return nil, "", "", false
+	}
+
+	ref = matches[6]
+	if ref == "" {
+		ref = "master"
+	}
+
+	path = matches[4]
+	if path == "" {
+		path = "."
+	}
+
+	return cloneURL, ref, path, true
+}

actions/api.go

@@ -0,0 +1,49 @@
+package actions
+
+import (
+	"context"
+	"io"
+)
+
+// Runner provides capabilities to run GitHub actions
+type Runner interface {
+	EventGrapher
+	EventLister
+	EventRunner
+	ActionRunner
+	io.Closer
+}
+
+// EventGrapher to list the actions
+type EventGrapher interface {
+	GraphEvent(eventName string) ([][]string, error)
+}
+
+// EventLister to list the events
+type EventLister interface {
+	ListEvents() []string
+}
+
+// EventRunner to run the actions for a given event
+type EventRunner interface {
+	RunEvent() error
+}
+
+// ActionRunner to run a specific actions
+type ActionRunner interface {
+	RunActions(actionNames ...string) error
+}
+
+// RunnerConfig contains the config for a new runner
+type RunnerConfig struct {
+	Ctx          context.Context // context to use for the run
+	Dryrun       bool            // don't start any of the containers
+	WorkingDir   string          // base directory to use
+	WorkflowPath string          // path to load main.workflow file, relative to WorkingDir
+	EventName    string          // name of event to run
+	EventPath    string          // path to JSON file to use for event.json in containers, relative to WorkingDir
+}
+
+type environmentApplier interface {
+	applyEnvironment(map[string]string)
+}

actions/model.go

@@ -0,0 +1,129 @@
+package actions
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/howeyc/gopass"
+)
+
+type workflowModel struct {
+	On       string
+	Resolves []string
+}
+
+type actionModel struct {
+	Needs   []string
+	Uses    string
+	Runs    []string
+	Args    []string
+	Env     map[string]string
+	Secrets []string
+}
+
+type workflowsFile struct {
+	Workflow map[string]workflowModel
+	Action   map[string]actionModel
+}
+
+func (wFile *workflowsFile) getWorkflow(eventName string) (*workflowModel, string, error) {
+	var rtn workflowModel
+	for wName, w := range wFile.Workflow {
+		if w.On == eventName {
+			rtn = w
+			return &rtn, wName, nil
+		}
+	}
+	return nil, "", fmt.Errorf("unsupported event: %v", eventName)
+}
+
+func (wFile *workflowsFile) getAction(actionName string) (*actionModel, error) {
+	if a, ok := wFile.Action[actionName]; ok {
+		return &a, nil
+	}
+	return nil, fmt.Errorf("unsupported action: %v", actionName)
+}
+
+// return a pipeline that is run in series.  pipeline is a list of steps to run in parallel
+func (wFile *workflowsFile) newExecutionGraph(actionNames ...string) [][]string {
+	// first, build a list of all the necessary actions to run, and their dependencies
+	actionDependencies := make(map[string][]string)
+	for len(actionNames) > 0 {
+		newActionNames := make([]string, 0)
+		for _, aName := range actionNames {
+			// make sure we haven't visited this action yet
+			if _, ok := actionDependencies[aName]; !ok {
+				actionDependencies[aName] = wFile.Action[aName].Needs
+				newActionNames = append(newActionNames, wFile.Action[aName].Needs...)
+			}
+		}
+		actionNames = newActionNames
+	}
+
+	// next, build an execution graph
+	graph := make([][]string, 0)
+	for len(actionDependencies) > 0 {
+		stage := make([]string, 0)
+		for aName, aDeps := range actionDependencies {
+			// make sure all deps are in the graph already
+			if listInLists(aDeps, graph...) {
+				stage = append(stage, aName)
+				delete(actionDependencies, aName)
+			}
+		}
+		if len(stage) == 0 {
+			log.Fatalf("Unable to build dependency graph!")
+		}
+		graph = append(graph, stage)
+	}
+
+	return graph
+}
+
+// return true iff all strings in srcList exist in at least one of the searchLists
+func listInLists(srcList []string, searchLists ...[]string) bool {
+	for _, src := range srcList {
+		found := false
+		for _, searchList := range searchLists {
+			for _, search := range searchList {
+				if src == search {
+					found = true
+				}
+			}
+		}
+		if !found {
+			return false
+		}
+	}
+	return true
+}
+
+var secretCache map[string]string
+
+func (action *actionModel) applyEnvironment(env map[string]string) {
+	for envKey, envValue := range action.Env {
+		env[envKey] = envValue
+	}
+
+	for _, secret := range action.Secrets {
+		if secretVal, ok := os.LookupEnv(secret); ok {
+			env[secret] = secretVal
+		} else {
+			if secretCache == nil {
+				secretCache = make(map[string]string)
+			}
+
+			if _, ok := secretCache[secret]; !ok {
+				fmt.Printf("Provide value for '%s': ", secret)
+				val, err := gopass.GetPasswdMasked()
+				if err != nil {
+					log.Fatal("abort")
+				}
+
+				secretCache[secret] = string(val)
+			}
+			env[secret] = secretCache[secret]
+		}
+	}
+}

actions/parser.go

@@ -5,9 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
-	"os"
-	"path/filepath"
 
 	"github.com/hashicorp/hcl"
 	"github.com/hashicorp/hcl/hcl/ast"
@@ -15,43 +12,12 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
-// ParseWorkflows will read in the set of actions from the workflow file
+func parseWorkflowsFile(workflowReader io.Reader) (*workflowsFile, error) {
-func ParseWorkflows(workingDir string, workflowPath string) (Workflows, error) {
-	workingDir, err := filepath.Abs(workingDir)
-	if err != nil {
-		return nil, err
-	}
-	log.Debugf("Setting working dir to %s", workingDir)
-
-	if !filepath.IsAbs(workflowPath) {
-		workflowPath = filepath.Join(workingDir, workflowPath)
-	}
-	log.Debugf("Loading workflow config from %s", workflowPath)
-	workflowReader, err := os.Open(workflowPath)
-	if err != nil {
-		return nil, err
-	}
-
-	workflows, err := parseWorkflowsFile(workflowReader)
-	if err != nil {
-		return nil, err
-	}
-	workflows.WorkingDir = workingDir
-	workflows.WorkflowPath = workflowPath
-	workflows.TempDir, err = ioutil.TempDir("", "act-")
-	if err != nil {
-		return nil, err
-	}
-
 	// TODO: add validation logic
 	// - check for circular dependencies
 	// - check for valid local path refs
 	// - check for valid dependencies
 
-	return workflows, nil
-}
-func parseWorkflowsFile(workflowReader io.Reader) (*workflowsFile, error) {
-
 	buf := new(bytes.Buffer)
 	_, err := buf.ReadFrom(workflowReader)
 	if err != nil {

actions/runner.go

@@ -1,31 +1,94 @@
 package actions
 
 import (
-	"archive/tar"
+	"io/ioutil"
-	"bytes"
-	"context"
-	"fmt"
-	"io"
-	"math/rand"
-	"net/http"
-	"net/url"
 	"os"
 	"path/filepath"
-	"regexp"
 	"sort"
 
-	"github.com/howeyc/gopass"
 	"github.com/nektos/act/common"
-	"github.com/nektos/act/container"
 	log "github.com/sirupsen/logrus"
 )
 
-var secretCache map[string]string
+type runnerImpl struct {
+	config    *RunnerConfig
+	workflows *workflowsFile
+	tempDir   string
+	eventJSON string
+}
 
-func (wFile *workflowsFile) ListEvents() []string {
+// NewRunner Creates a new Runner
+func NewRunner(runnerConfig *RunnerConfig) (Runner, error) {
+	runner := &runnerImpl{
+		config: runnerConfig,
+	}
+
+	init := common.NewPipelineExecutor(
+		runner.setupTempDir,
+		runner.setupWorkingDir,
+		runner.setupWorkflows,
+		runner.setupEvent,
+	)
+
+	return runner, init()
+}
+
+func (runner *runnerImpl) setupTempDir() error {
+	var err error
+	runner.tempDir, err = ioutil.TempDir("", "act-")
+	return err
+}
+
+func (runner *runnerImpl) setupWorkingDir() error {
+	var err error
+	runner.config.WorkingDir, err = filepath.Abs(runner.config.WorkingDir)
+	log.Debugf("Setting working dir to %s", runner.config.WorkingDir)
+	return err
+}
+
+func (runner *runnerImpl) setupWorkflows() error {
+	runner.config.WorkflowPath = runner.resolvePath(runner.config.WorkflowPath)
+	log.Debugf("Loading workflow config from %s", runner.config.WorkflowPath)
+	workflowReader, err := os.Open(runner.config.WorkflowPath)
+	if err != nil {
+		return err
+	}
+
+	defer workflowReader.Close()
+
+	runner.workflows, err = parseWorkflowsFile(workflowReader)
+	return err
+}
+
+func (runner *runnerImpl) setupEvent() error {
+	runner.eventJSON = "{}"
+	if runner.config.EventPath != "" {
+		runner.config.EventPath = runner.resolvePath(runner.config.EventPath)
+		log.Debugf("Reading event.json from %s", runner.config.EventPath)
+		eventJSONBytes, err := ioutil.ReadFile(runner.config.EventPath)
+		if err != nil {
+			return err
+		}
+		runner.eventJSON = string(eventJSONBytes)
+	}
+	return nil
+}
+
+func (runner *runnerImpl) resolvePath(path string) string {
+	if path == "" {
+		return path
+	}
+	if !filepath.IsAbs(path) {
+		path = filepath.Join(runner.config.WorkingDir, path)
+	}
+	return path
+}
+
+// ListEvents gets all the events in the workflows file
+func (runner *runnerImpl) ListEvents() []string {
 	log.Debugf("Listing all events")
 	events := make([]string, 0)
-	for _, w := range wFile.Workflow {
+	for _, w := range runner.workflows.Workflow {
 		events = append(events, w.On)
 	}
 
@@ -37,380 +100,46 @@ func (wFile *workflowsFile) ListEvents() []string {
 	return events
 }
 
-func (wFile *workflowsFile) GraphEvent(eventName string) ([][]string, error) {
+// GraphEvent builds an execution path
+func (runner *runnerImpl) GraphEvent(eventName string) ([][]string, error) {
 	log.Debugf("Listing actions for event '%s'", eventName)
-	workflow, _, err := wFile.getWorkflow(eventName)
+	workflow, _, err := runner.workflows.getWorkflow(eventName)
 	if err != nil {
 		return nil, err
 	}
-	return wFile.newExecutionGraph(workflow.Resolves...), nil
+	return runner.workflows.newExecutionGraph(workflow.Resolves...), nil
 }
 
-func (wFile *workflowsFile) RunAction(ctx context.Context, dryrun bool, actionName string, eventJSON string) error {
+// RunAction runs a set of actions in parallel, and their dependencies
-	log.Debugf("Running action '%s'", actionName)
+func (runner *runnerImpl) RunActions(actionNames ...string) error {
-	return wFile.newActionExecutor(ctx, dryrun, "", eventJSON, actionName)()
+	log.Debugf("Running actions %+q", actionNames)
-}
+	graph := runner.workflows.newExecutionGraph(actionNames...)
-
-func (wFile *workflowsFile) RunEvent(ctx context.Context, dryrun bool, eventName string, eventJSON string) error {
-	log.Debugf("Running event '%s'", eventName)
-	workflow, _, err := wFile.getWorkflow(eventName)
-	if err != nil {
-		return err
-	}
-
-	log.Debugf("Running actions %s -> %s", eventName, workflow.Resolves)
-	return wFile.newActionExecutor(ctx, dryrun, eventName, eventJSON, workflow.Resolves...)()
-}
-
-func (wFile *workflowsFile) getWorkflow(eventName string) (*workflowDef, string, error) {
-	var rtn workflowDef
-	for wName, w := range wFile.Workflow {
-		if w.On == eventName {
-			rtn = w
-			return &rtn, wName, nil
-		}
-	}
-	return nil, "", fmt.Errorf("unsupported event: %v", eventName)
-}
-
-func (wFile *workflowsFile) getAction(actionName string) (*actionDef, error) {
-	if a, ok := wFile.Action[actionName]; ok {
-		return &a, nil
-	}
-	return nil, fmt.Errorf("unsupported action: %v", actionName)
-}
-
-func (wFile *workflowsFile) Close() {
-	os.RemoveAll(wFile.TempDir)
-}
-
-// return a pipeline that is run in series.  pipeline is a list of steps to run in parallel
-func (wFile *workflowsFile) newExecutionGraph(actionNames ...string) [][]string {
-	// first, build a list of all the necessary actions to run, and their dependencies
-	actionDependencies := make(map[string][]string)
-	for len(actionNames) > 0 {
-		newActionNames := make([]string, 0)
-		for _, aName := range actionNames {
-			// make sure we haven't visited this action yet
-			if _, ok := actionDependencies[aName]; !ok {
-				actionDependencies[aName] = wFile.Action[aName].Needs
-				newActionNames = append(newActionNames, wFile.Action[aName].Needs...)
-			}
-		}
-		actionNames = newActionNames
-	}
-
-	// next, build an execution graph
-	graph := make([][]string, 0)
-	for len(actionDependencies) > 0 {
-		stage := make([]string, 0)
-		for aName, aDeps := range actionDependencies {
-			// make sure all deps are in the graph already
-			if listInLists(aDeps, graph...) {
-				stage = append(stage, aName)
-				delete(actionDependencies, aName)
-			}
-		}
-		if len(stage) == 0 {
-			log.Fatalf("Unable to build dependency graph!")
-		}
-		graph = append(graph, stage)
-	}
-
-	return graph
-}
-
-// return true iff all strings in srcList exist in at least one of the searchLists
-func listInLists(srcList []string, searchLists ...[]string) bool {
-	for _, src := range srcList {
-		found := false
-		for _, searchList := range searchLists {
-			for _, search := range searchList {
-				if src == search {
-					found = true
-				}
-			}
-		}
-		if !found {
-			return false
-		}
-	}
-	return true
-}
-
-func (wFile *workflowsFile) newActionExecutor(ctx context.Context, dryrun bool, eventName string, eventJSON string, actionNames ...string) common.Executor {
-	graph := wFile.newExecutionGraph(actionNames...)
 
 	pipeline := make([]common.Executor, 0)
 	for _, actions := range graph {
 		stage := make([]common.Executor, 0)
 		for _, actionName := range actions {
-			action, err := wFile.getAction(actionName)
+			stage = append(stage, runner.newActionExecutor(actionName))
-			if err != nil {
-				return common.NewErrorExecutor(err)
-			}
-			actionExecutor := action.asExecutor(ctx, dryrun, wFile.WorkingDir, wFile.TempDir, actionName, wFile.setupEnvironment(eventName, actionName, dryrun), eventJSON)
-			stage = append(stage, actionExecutor)
 		}
 		pipeline = append(pipeline, common.NewParallelExecutor(stage...))
 	}
 
-	return common.NewPipelineExecutor(pipeline...)
+	executor := common.NewPipelineExecutor(pipeline...)
+	return executor()
 }
 
-func (action *actionDef) asExecutor(ctx context.Context, dryrun bool, workingDir string, tempDir string, actionName string, env []string, eventJSON string) common.Executor {
+// RunEvent runs the actions for a single event
-	logger := newActionLogger(actionName, dryrun)
+func (runner *runnerImpl) RunEvent() error {
-	log.Debugf("Using '%s' for action '%s'", action.Uses, actionName)
+	log.Debugf("Running event '%s'", runner.config.EventName)
-
+	workflow, _, err := runner.workflows.getWorkflow(runner.config.EventName)
-	in := container.DockerExecutorInput{
-		Ctx:    ctx,
-		Logger: logger,
-		Dryrun: dryrun,
-	}
-
-	var image string
-	executors := make([]common.Executor, 0)
-	if imageRef, ok := parseImageReference(action.Uses); ok {
-		executors = append(executors, container.NewDockerPullExecutor(container.NewDockerPullExecutorInput{
-			DockerExecutorInput: in,
-			Image:               imageRef,
-		}))
-		image = imageRef
-	} else if contextDir, imageTag, ok := parseImageLocal(workingDir, action.Uses); ok {
-		executors = append(executors, container.NewDockerBuildExecutor(container.NewDockerBuildExecutorInput{
-			DockerExecutorInput: in,
-			ContextDir:          contextDir,
-			ImageTag:            imageTag,
-		}))
-		image = imageTag
-	} else if cloneURL, ref, path, ok := parseImageGithub(action.Uses); ok {
-		cloneDir := filepath.Join(os.TempDir(), "act", action.Uses)
-		executors = append(executors, common.NewGitCloneExecutor(common.NewGitCloneExecutorInput{
-			URL:    cloneURL,
-			Ref:    ref,
-			Dir:    cloneDir,
-			Logger: logger,
-			Dryrun: dryrun,
-		}))
-
-		contextDir := filepath.Join(cloneDir, path)
-		imageTag := fmt.Sprintf("%s:%s", filepath.Base(cloneURL.Path), ref)
-
-		executors = append(executors, container.NewDockerBuildExecutor(container.NewDockerBuildExecutorInput{
-			DockerExecutorInput: in,
-			ContextDir:          contextDir,
-			ImageTag:            imageTag,
-		}))
-		image = imageTag
-	} else {
-		return common.NewErrorExecutor(fmt.Errorf("unable to determine executor type for image '%s'", action.Uses))
-	}
-
-	ghReader, err := action.createGithubTarball(eventJSON)
 	if err != nil {
-		return common.NewErrorExecutor(err)
+		return err
 	}
-	randSuffix := randString(6)
-	containerName := regexp.MustCompile("[^a-zA-Z0-9]").ReplaceAllString(actionName, "-")
-	if len(containerName)+len(randSuffix)+1 > 30 {
-		containerName = containerName[:(30 - (len(randSuffix) + 1))]
-	}
-	executors = append(executors, container.NewDockerRunExecutor(container.NewDockerRunExecutorInput{
-		DockerExecutorInput: in,
-		Cmd:                 action.Args,
-		Entrypoint:          action.Runs,
-		Image:               image,
-		WorkingDir:          "/github/workspace",
-		Env:                 env,
-		Name:                fmt.Sprintf("%s-%s", containerName, randSuffix),
-		Binds: []string{
-			fmt.Sprintf("%s:%s", workingDir, "/github/workspace"),
-			fmt.Sprintf("%s:%s", tempDir, "/github/home"),
-			fmt.Sprintf("%s:%s", "/var/run/docker.sock", "/var/run/docker.sock"),
-		},
-		Content: map[string]io.Reader{"/github": ghReader},
-	}))
 
-	return common.NewPipelineExecutor(executors...)
+	log.Debugf("Running actions %s -> %s", runner.config.EventName, workflow.Resolves)
+	return runner.RunActions(workflow.Resolves...)
 }
 
-const letterBytes = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+func (runner *runnerImpl) Close() error {
-
+	return os.RemoveAll(runner.tempDir)
-func randString(slen int) string {
-	b := make([]byte, slen)
-	for i := range b {
-		b[i] = letterBytes[rand.Int63()%int64(len(letterBytes))]
-	}
-	return string(b)
-}
-
-func (action *actionDef) createGithubTarball(eventJSON string) (io.Reader, error) {
-	var buf bytes.Buffer
-	tw := tar.NewWriter(&buf)
-	var files = []struct {
-		Name string
-		Mode int64
-		Body string
-	}{
-		{"workflow/event.json", 0644, eventJSON},
-	}
-	for _, file := range files {
-		log.Debugf("Writing entry to tarball %s len:%d from %v", file.Name, len(eventJSON), eventJSON)
-		hdr := &tar.Header{
-			Name: file.Name,
-			Mode: file.Mode,
-			Size: int64(len(eventJSON)),
-		}
-		if err := tw.WriteHeader(hdr); err != nil {
-			return nil, err
-		}
-		if _, err := tw.Write([]byte(eventJSON)); err != nil {
-			return nil, err
-		}
-	}
-	if err := tw.Close(); err != nil {
-		return nil, err
-	}
-
-	return &buf, nil
-
-}
-
-func (wFile *workflowsFile) setupEnvironment(eventName string, actionName string, dryrun bool) []string {
-	env := make([]string, 0)
-	repoPath := wFile.WorkingDir
-
-	_, workflowName, _ := wFile.getWorkflow(eventName)
-
-	env = append(env, fmt.Sprintf("HOME=/github/home"))
-	env = append(env, fmt.Sprintf("GITHUB_ACTOR=nektos/act"))
-	env = append(env, fmt.Sprintf("GITHUB_EVENT_PATH=/github/workflow/event.json"))
-	env = append(env, fmt.Sprintf("GITHUB_WORKSPACE=/github/workspace"))
-	env = append(env, fmt.Sprintf("GITHUB_WORKFLOW=%s", workflowName))
-	env = append(env, fmt.Sprintf("GITHUB_EVENT_NAME=%s", eventName))
-	env = append(env, fmt.Sprintf("GITHUB_ACTION=%s", actionName))
-
-	_, rev, err := common.FindGitRevision(repoPath)
-	if err != nil {
-		log.Warningf("unable to get git revision: %v", err)
-	} else {
-		env = append(env, fmt.Sprintf("GITHUB_SHA=%s", rev))
-	}
-
-	repo, err := common.FindGithubRepo(repoPath)
-	if err != nil {
-		log.Warningf("unable to get git repo: %v", err)
-	} else {
-		env = append(env, fmt.Sprintf("GITHUB_REPOSITORY=%s", repo))
-	}
-
-	branch, err := common.FindGitBranch(repoPath)
-	if err != nil {
-		log.Warningf("unable to get git branch: %v", err)
-	} else {
-		env = append(env, fmt.Sprintf("GITHUB_REF=refs/heads/%s", branch))
-	}
-
-	action, err := wFile.getAction(actionName)
-	if err == nil && !dryrun {
-		action.applyEnvironmentSecrets(&env)
-	}
-
-	return env
-}
-
-func (action *actionDef) applyEnvironmentSecrets(env *[]string) {
-	if action != nil {
-		for envKey, envValue := range action.Env {
-			*env = append(*env, fmt.Sprintf("%s=%s", envKey, envValue))
-		}
-
-		for _, secret := range action.Secrets {
-			if secretVal, ok := os.LookupEnv(secret); ok {
-				*env = append(*env, fmt.Sprintf("%s=%s", secret, secretVal))
-			} else {
-				if secretCache == nil {
-					secretCache = make(map[string]string)
-				}
-
-				if _, ok := secretCache[secret]; !ok {
-					fmt.Printf("Provide value for '%s': ", secret)
-					val, err := gopass.GetPasswdMasked()
-					if err != nil {
-						log.Fatal("abort")
-					}
-
-					secretCache[secret] = string(val)
-				}
-				*env = append(*env, fmt.Sprintf("%s=%s", secret, secretCache[secret]))
-			}
-		}
-	}
-}
-
-// imageURL is the directory where a `Dockerfile` should exist
-func parseImageLocal(workingDir string, contextDir string) (contextDirOut string, tag string, ok bool) {
-	if !filepath.IsAbs(contextDir) {
-		contextDir = filepath.Join(workingDir, contextDir)
-	}
-	if _, err := os.Stat(filepath.Join(contextDir, "Dockerfile")); os.IsNotExist(err) {
-		log.Debugf("Ignoring missing Dockerfile '%s/Dockerfile'", contextDir)
-		return "", "", false
-	}
-
-	sha, _, err := common.FindGitRevision(contextDir)
-	if err != nil {
-		log.Warnf("Unable to determine git revision: %v", err)
-		sha = "latest"
-	}
-	return contextDir, fmt.Sprintf("%s:%s", filepath.Base(contextDir), sha), true
-}
-
-// imageURL is the URL for a docker repo
-func parseImageReference(image string) (ref string, ok bool) {
-	imageURL, err := url.Parse(image)
-	if err != nil {
-		log.Debugf("Unable to parse image as url: %v", err)
-		return "", false
-	}
-	if imageURL.Scheme != "docker" {
-		log.Debugf("Ignoring non-docker ref '%s'", imageURL.String())
-		return "", false
-	}
-
-	return fmt.Sprintf("%s%s", imageURL.Host, imageURL.Path), true
-}
-
-// imageURL is the directory where a `Dockerfile` should exist
-func parseImageGithub(image string) (cloneURL *url.URL, ref string, path string, ok bool) {
-	re := regexp.MustCompile("^([^/@]+)/([^/@]+)(/([^@]*))?(@(.*))?$")
-	matches := re.FindStringSubmatch(image)
-
-	if matches == nil {
-		return nil, "", "", false
-	}
-
-	cloneURL, err := url.Parse(fmt.Sprintf("https://github.com/%s/%s", matches[1], matches[2]))
-	if err != nil {
-		log.Debugf("Unable to parse as URL: %v", err)
-		return nil, "", "", false
-	}
-
-	resp, err := http.Head(cloneURL.String())
-	if resp.StatusCode >= 400 || err != nil {
-		log.Debugf("Unable to HEAD URL %s status=%v err=%v", cloneURL.String(), resp.StatusCode, err)
-		return nil, "", "", false
-	}
-
-	ref = matches[6]
-	if ref == "" {
-		ref = "master"
-	}
-
-	path = matches[4]
-	if path == "" {
-		path = "."
-	}
-
-	return cloneURL, ref, path, true
 }

actions/runner_exec.go

@@ -0,0 +1,185 @@
+package actions
+
+import (
+	"archive/tar"
+	"bytes"
+	"fmt"
+	"io"
+	"math/rand"
+	"os"
+	"path/filepath"
+	"regexp"
+
+	"github.com/nektos/act/common"
+	"github.com/nektos/act/container"
+	log "github.com/sirupsen/logrus"
+)
+
+func (runner *runnerImpl) newActionExecutor(actionName string) common.Executor {
+	action, err := runner.workflows.getAction(actionName)
+	if err != nil {
+		return common.NewErrorExecutor(err)
+	}
+
+	env := make(map[string]string)
+	for _, applier := range []environmentApplier{action, runner} {
+		applier.applyEnvironment(env)
+	}
+	env["GITHUB_ACTION"] = actionName
+
+	logger := newActionLogger(actionName, runner.config.Dryrun)
+	log.Debugf("Using '%s' for action '%s'", action.Uses, actionName)
+
+	in := container.DockerExecutorInput{
+		Ctx:    runner.config.Ctx,
+		Logger: logger,
+		Dryrun: runner.config.Dryrun,
+	}
+
+	var image string
+	executors := make([]common.Executor, 0)
+	if imageRef, ok := parseImageReference(action.Uses); ok {
+		executors = append(executors, container.NewDockerPullExecutor(container.NewDockerPullExecutorInput{
+			DockerExecutorInput: in,
+			Image:               imageRef,
+		}))
+		image = imageRef
+	} else if contextDir, imageTag, ok := parseImageLocal(runner.config.WorkingDir, action.Uses); ok {
+		executors = append(executors, container.NewDockerBuildExecutor(container.NewDockerBuildExecutorInput{
+			DockerExecutorInput: in,
+			ContextDir:          contextDir,
+			ImageTag:            imageTag,
+		}))
+		image = imageTag
+	} else if cloneURL, ref, path, ok := parseImageGithub(action.Uses); ok {
+		cloneDir := filepath.Join(os.TempDir(), "act", action.Uses)
+		executors = append(executors, common.NewGitCloneExecutor(common.NewGitCloneExecutorInput{
+			URL:    cloneURL,
+			Ref:    ref,
+			Dir:    cloneDir,
+			Logger: logger,
+			Dryrun: runner.config.Dryrun,
+		}))
+
+		contextDir := filepath.Join(cloneDir, path)
+		imageTag := fmt.Sprintf("%s:%s", filepath.Base(cloneURL.Path), ref)
+
+		executors = append(executors, container.NewDockerBuildExecutor(container.NewDockerBuildExecutorInput{
+			DockerExecutorInput: in,
+			ContextDir:          contextDir,
+			ImageTag:            imageTag,
+		}))
+		image = imageTag
+	} else {
+		return common.NewErrorExecutor(fmt.Errorf("unable to determine executor type for image '%s'", action.Uses))
+	}
+
+	ghReader, err := runner.createGithubTarball()
+	if err != nil {
+		return common.NewErrorExecutor(err)
+	}
+	randSuffix := randString(6)
+	containerName := regexp.MustCompile("[^a-zA-Z0-9]").ReplaceAllString(actionName, "-")
+	if len(containerName)+len(randSuffix)+1 > 30 {
+		containerName = containerName[:(30 - (len(randSuffix) + 1))]
+	}
+
+	envList := make([]string, 0)
+	for k, v := range env {
+		envList = append(envList, fmt.Sprintf("%s=%s", k, v))
+	}
+	executors = append(executors, container.NewDockerRunExecutor(container.NewDockerRunExecutorInput{
+		DockerExecutorInput: in,
+		Cmd:                 action.Args,
+		Entrypoint:          action.Runs,
+		Image:               image,
+		WorkingDir:          "/github/workspace",
+		Env:                 envList,
+		Name:                fmt.Sprintf("%s-%s", containerName, randSuffix),
+		Binds: []string{
+			fmt.Sprintf("%s:%s", runner.config.WorkingDir, "/github/workspace"),
+			fmt.Sprintf("%s:%s", runner.tempDir, "/github/home"),
+			fmt.Sprintf("%s:%s", "/var/run/docker.sock", "/var/run/docker.sock"),
+		},
+		Content: map[string]io.Reader{"/github": ghReader},
+	}))
+
+	return common.NewPipelineExecutor(executors...)
+}
+
+func (runner *runnerImpl) applyEnvironment(env map[string]string) {
+	repoPath := runner.config.WorkingDir
+
+	_, workflowName, _ := runner.workflows.getWorkflow(runner.config.EventName)
+
+	env["HOME"] = "/github/home"
+	env["GITHUB_ACTOR"] = "nektos/act"
+	env["GITHUB_EVENT_PATH"] = "/github/workflow/event.json"
+	env["GITHUB_WORKSPACE"] = "/github/workspace"
+	env["GITHUB_WORKFLOW"] = workflowName
+	env["GITHUB_EVENT_NAME"] = runner.config.EventName
+
+	_, rev, err := common.FindGitRevision(repoPath)
+	if err != nil {
+		log.Warningf("unable to get git revision: %v", err)
+	} else {
+		env["GITHUB_SHA"] = rev
+	}
+
+	repo, err := common.FindGithubRepo(repoPath)
+	if err != nil {
+		log.Warningf("unable to get git repo: %v", err)
+	} else {
+		env["GITHUB_REPOSITORY"] = repo
+	}
+
+	branch, err := common.FindGitBranch(repoPath)
+	if err != nil {
+		log.Warningf("unable to get git branch: %v", err)
+	} else {
+		env["GITHUB_REF"] = fmt.Sprintf("refs/heads/%s", branch)
+	}
+
+}
+
+func (runner *runnerImpl) createGithubTarball() (io.Reader, error) {
+	var buf bytes.Buffer
+	tw := tar.NewWriter(&buf)
+	var files = []struct {
+		Name string
+		Mode int64
+		Body string
+	}{
+		{"workflow/event.json", 0644, runner.eventJSON},
+	}
+	for _, file := range files {
+		log.Debugf("Writing entry to tarball %s len:%d", file.Name, len(runner.eventJSON))
+		hdr := &tar.Header{
+			Name: file.Name,
+			Mode: file.Mode,
+			Size: int64(len(runner.eventJSON)),
+		}
+		if err := tw.WriteHeader(hdr); err != nil {
+			return nil, err
+		}
+		if _, err := tw.Write([]byte(runner.eventJSON)); err != nil {
+			return nil, err
+		}
+	}
+	if err := tw.Close(); err != nil {
+		return nil, err
+	}
+
+	return &buf, nil
+
+}
+
+const letterBytes = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+
+func randString(slen int) string {
+	b := make([]byte, slen)
+	for i := range b {
+		b[i] = letterBytes[rand.Int63()%int64(len(letterBytes))]
+	}
+	return string(b)
+}

actions/types.go

@@ -1,56 +0,0 @@
-package actions
-
-import (
-	"context"
-)
-
-// Workflows provides capabilities to work with the workflow file
-type Workflows interface {
-	EventGrapher
-	EventLister
-	ActionRunner
-	EventRunner
-	Close()
-}
-
-// EventGrapher to list the actions
-type EventGrapher interface {
-	GraphEvent(eventName string) ([][]string, error)
-}
-
-// EventLister to list the events
-type EventLister interface {
-	ListEvents() []string
-}
-
-// ActionRunner to run an action
-type ActionRunner interface {
-	RunAction(ctx context.Context, dryrun bool, action string, eventJSON string) error
-}
-
-// EventRunner to run an event
-type EventRunner interface {
-	RunEvent(ctx context.Context, dryrun bool, event string, eventJSON string) error
-}
-
-type workflowDef struct {
-	On       string
-	Resolves []string
-}
-
-type actionDef struct {
-	Needs   []string
-	Uses    string
-	Runs    []string
-	Args    []string
-	Env     map[string]string
-	Secrets []string
-}
-
-type workflowsFile struct {
-	TempDir      string
-	WorkingDir   string
-	WorkflowPath string
-	Workflow     map[string]workflowDef
-	Action       map[string]actionDef
-}

cmd/root.go

@@ -3,9 +3,7 @@ package cmd
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"os"
-	"path/filepath"
 
 	"github.com/nektos/act/actions"
 	"github.com/nektos/act/common"
@@ -13,82 +11,80 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var verbose bool
-var workflowPath string
-var workingDir string
-var list bool
-var actionName string
-var dryrun bool
-var eventPath string
-
 // Execute is the entry point to running the CLI
 func Execute(ctx context.Context, version string) {
+	runnerConfig := &actions.RunnerConfig{Ctx: ctx}
 	var rootCmd = &cobra.Command{
-		Use:          "act [event name to run]",
+		Use:              "act [event name to run]",
-		Short:        "Run Github actions locally by specifying the event name (e.g. `push`) or an action name directly.",
+		Short:            "Run Github actions locally by specifying the event name (e.g. `push`) or an action name directly.",
-		Args:         cobra.MaximumNArgs(1),
+		Args:             cobra.MaximumNArgs(1),
-		RunE:         newRunAction(ctx),
+		RunE:             newRunCommand(runnerConfig),
-		Version:      version,
+		PersistentPreRun: setupLogging,
-		SilenceUsage: true,
+		Version:          version,
+		SilenceUsage:     true,
 	}
-	rootCmd.Flags().BoolVarP(&list, "list", "l", false, "list actions")
+	rootCmd.Flags().BoolP("list", "l", false, "list actions")
-	rootCmd.Flags().StringVarP(&actionName, "action", "a", "", "run action")
+	rootCmd.Flags().StringP("action", "a", "", "run action")
-	rootCmd.Flags().StringVarP(&eventPath, "event", "e", "", "path to event JSON file")
+	rootCmd.Flags().StringVarP(&runnerConfig.EventPath, "event", "e", "", "path to event JSON file")
-	rootCmd.PersistentFlags().BoolVarP(&dryrun, "dryrun", "n", false, "dryrun mode")
+	rootCmd.PersistentFlags().BoolP("verbose", "v", false, "verbose output")
-	rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "verbose output")
+	rootCmd.PersistentFlags().BoolVarP(&runnerConfig.Dryrun, "dryrun", "n", false, "dryrun mode")
-	rootCmd.PersistentFlags().StringVarP(&workflowPath, "file", "f", "./.github/main.workflow", "path to workflow file")
+	rootCmd.PersistentFlags().StringVarP(&runnerConfig.WorkflowPath, "file", "f", "./.github/main.workflow", "path to workflow file")
-	rootCmd.PersistentFlags().StringVarP(&workingDir, "directory", "C", ".", "working directory")
+	rootCmd.PersistentFlags().StringVarP(&runnerConfig.WorkingDir, "directory", "C", ".", "working directory")
 	if err := rootCmd.Execute(); err != nil {
 		os.Exit(1)
 	}
 
 }
 
-func newRunAction(ctx context.Context) func(*cobra.Command, []string) error {
+func setupLogging(cmd *cobra.Command, args []string) {
-	return func(cmd *cobra.Command, args []string) error {
+	verbose, _ := cmd.Flags().GetBool("verbose")
-		if verbose {
+	if verbose {
-			log.SetLevel(log.DebugLevel)
+		log.SetLevel(log.DebugLevel)
-		}
-
-		workflows, err := actions.ParseWorkflows(workingDir, workflowPath)
-		if err != nil {
-			return err
-		}
-
-		defer workflows.Close()
-
-		if list {
-			return listEvents(workflows)
-		}
-
-		eventJSON := "{}"
-		if eventPath != "" {
-			if !filepath.IsAbs(eventPath) {
-				eventPath = filepath.Join(workingDir, eventPath)
-			}
-			log.Debugf("Reading event.json from %s", eventPath)
-			eventJSONBytes, err := ioutil.ReadFile(eventPath)
-			if err != nil {
-				return err
-			}
-			eventJSON = string(eventJSONBytes)
-		}
-
-		if actionName != "" {
-			return workflows.RunAction(ctx, dryrun, actionName, eventJSON)
-		}
-
-		if len(args) == 0 {
-			return workflows.RunEvent(ctx, dryrun, "push", eventJSON)
-		}
-		return workflows.RunEvent(ctx, dryrun, args[0], eventJSON)
 	}
 }
 
-func listEvents(workflows actions.Workflows) error {
+func newRunCommand(runnerConfig *actions.RunnerConfig) func(*cobra.Command, []string) error {
-	eventNames := workflows.ListEvents()
+	return func(cmd *cobra.Command, args []string) error {
+		if len(args) == 0 {
+			runnerConfig.EventName = "push"
+		} else {
+			runnerConfig.EventName = args[0]
+		}
+
+		// create the runner
+		runner, err := actions.NewRunner(runnerConfig)
+		if err != nil {
+			return err
+		}
+		defer runner.Close()
+
+		// check if we should just print the graph
+		list, err := cmd.Flags().GetBool("list")
+		if err != nil {
+			return err
+		}
+		if list {
+			return drawGraph(runner)
+		}
+
+		// check if we are running just a single action
+		actionName, err := cmd.Flags().GetString("action")
+		if err != nil {
+			return err
+		}
+		if actionName != "" {
+			return runner.RunActions(actionName)
+		}
+
+		// run the event in the RunnerRonfig
+		return runner.RunEvent()
+	}
+}
+
+func drawGraph(runner actions.Runner) error {
+	eventNames := runner.ListEvents()
 	for _, eventName := range eventNames {
-		graph, err := workflows.GraphEvent(eventName)
+		graph, err := runner.GraphEvent(eventName)
 		if err != nil {
 			return err
 		}

go.mod

@@ -10,9 +10,7 @@ require (
 	github.com/docker/go-connections v0.4.0 // indirect
 	github.com/docker/go-units v0.3.3 // indirect
 	github.com/go-ini/ini v1.41.0
-	github.com/gobuffalo/packr/v2 v2.0.0-rc.14 // indirect
 	github.com/gogo/protobuf v1.2.0 // indirect
-	github.com/google/pprof v0.0.0-20190109223431-e84dfd68c163 // indirect
 	github.com/gopherjs/gopherjs v0.0.0-20181103185306-d547d1d9531e // indirect
 	github.com/gorilla/context v1.1.1 // indirect
 	github.com/gorilla/mux v1.6.2 // indirect
@@ -23,15 +21,18 @@ require (
 	github.com/opencontainers/go-digest v1.0.0-rc1 // indirect
 	github.com/opencontainers/image-spec v1.0.1 // indirect
 	github.com/opencontainers/runc v0.1.1 // indirect
+	github.com/pkg/errors v0.8.1 // indirect
 	github.com/sirupsen/logrus v1.3.0
 	github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d // indirect
 	github.com/smartystreets/goconvey v0.0.0-20181108003508-044398e4856c // indirect
 	github.com/spf13/cobra v0.0.3
+	github.com/spf13/pflag v1.0.3 // indirect
 	github.com/stretchr/testify v1.3.0
-	golang.org/x/arch v0.0.0-20181203225421-5a4828bb7045 // indirect
 	golang.org/x/crypto v0.0.0-20190103213133-ff983b9c42bc
+	golang.org/x/net v0.0.0-20181220203305-927f97764cc3 // indirect
+	golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4 // indirect
+	golang.org/x/sys v0.0.0-20190102155601-82a175fd1598 // indirect
 	golang.org/x/time v0.0.0-20181108054448-85acf8d2951c // indirect
-	google.golang.org/appengine v1.2.0 // indirect
 	google.golang.org/grpc v1.17.0 // indirect
 	gopkg.in/ini.v1 v1.41.0 // indirect
 	gopkg.in/src-d/go-git.v4 v4.8.1

go.sum

@@ -1,312 +1,76 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 h1:w+iIsaOQNcT7OZ575w+acHgRric5iCyQh+xv+KJ4HB8=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/Masterminds/semver v1.4.2/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/Microsoft/go-winio v0.4.11 h1:zoIOcVf0xPN1tnMVbTtEdI+P8OofVk3NObnwOQ6nK2Q=
 github.com/Microsoft/go-winio v0.4.11/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
 github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 h1:TngWCqHvy9oXAN6lEVMRuU21PR1EtLVZJmdB18Gu3Rw=
 github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5/go.mod h1:lmUJ/7eu/Q8D7ML55dXQrVaamCz2vxCfdQBasLZfHKk=
-github.com/ajg/form v0.0.0-20160822230020-523a5da1a92f/go.mod h1:uL1WgH+h2mgNtvBq0339dVnzXdBETtL2LeUXaIv25UY=
 github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7 h1:uSoVVbwJiQipAclBbw+8quDsfcvFjOpI5iCf4p/cqCs=
 github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7/go.mod h1:6zEj6s6u/ghQa61ZWa/C2Aw3RkjiTBOix7dkqa1VLIs=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 h1:kFOfPq6dUM1hTo4JG6LR5AXSUEsOjtdm0kw0FtQtMJA=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
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