act/pkg/runner/run_context.go

752 lines
21 KiB
Go

package runner
import (
"context"
"encoding/json"
"fmt"
"os"
"path/filepath"
"regexp"
"runtime"
"strings"
"github.com/google/shlex"
"github.com/spf13/pflag"
"github.com/mitchellh/go-homedir"
log "github.com/sirupsen/logrus"
selinux "github.com/opencontainers/selinux/go-selinux"
"github.com/nektos/act/pkg/common"
"github.com/nektos/act/pkg/container"
"github.com/nektos/act/pkg/model"
)
const ActPath string = "/var/run/act"
// RunContext contains info about current job
type RunContext struct {
Name string
Config *Config
Matrix map[string]interface{}
Run *model.Run
EventJSON string
Env map[string]string
ExtraPath []string
CurrentStep string
StepResults map[string]*model.StepResult
ExprEval ExpressionEvaluator
JobContainer container.Container
OutputMappings map[MappableOutput]MappableOutput
JobName string
ActionPath string
ActionRef string
ActionRepository string
Composite *model.Action
Inputs map[string]interface{}
Parent *RunContext
Masks []string
}
func (rc *RunContext) AddMask(mask string) {
rc.Masks = append(rc.Masks, mask)
}
func (rc *RunContext) Clone() *RunContext {
clone := *rc
clone.CurrentStep = ""
clone.Composite = nil
clone.Inputs = nil
clone.StepResults = make(map[string]*model.StepResult)
clone.Parent = rc
return &clone
}
type MappableOutput struct {
StepID string
OutputName string
}
func (rc *RunContext) String() string {
return fmt.Sprintf("%s/%s", rc.Run.Workflow.Name, rc.Name)
}
// GetEnv returns the env for the context
func (rc *RunContext) GetEnv() map[string]string {
if rc.Env == nil {
rc.Env = mergeMaps(rc.Config.Env, rc.Run.Workflow.Env, rc.Run.Job().Environment())
}
rc.Env["ACT"] = "true"
return rc.Env
}
func (rc *RunContext) jobContainerName() string {
return createContainerName("act", rc.String())
}
// Returns the binds and mounts for the container, resolving paths as appopriate
func (rc *RunContext) GetBindsAndMounts() ([]string, map[string]string) {
name := rc.jobContainerName()
if rc.Config.ContainerDaemonSocket == "" {
rc.Config.ContainerDaemonSocket = "/var/run/docker.sock"
}
binds := []string{
fmt.Sprintf("%s:%s", rc.Config.ContainerDaemonSocket, "/var/run/docker.sock"),
}
mounts := map[string]string{
"act-toolcache": "/toolcache",
name + "-env": ActPath,
}
if rc.Config.BindWorkdir {
bindModifiers := ""
if runtime.GOOS == "darwin" {
bindModifiers = ":delegated"
}
if selinux.GetEnabled() {
bindModifiers = ":z"
}
binds = append(binds, fmt.Sprintf("%s:%s%s", rc.Config.Workdir, rc.Config.ContainerWorkdir(), bindModifiers))
} else {
mounts[name] = rc.Config.ContainerWorkdir()
}
return binds, mounts
}
func (rc *RunContext) startJobContainer() common.Executor {
image := rc.platformImage()
hostname := rc.hostname()
return func(ctx context.Context) error {
rawLogger := common.Logger(ctx).WithField("raw_output", true)
logWriter := common.NewLineWriter(rc.commandHandler(ctx), func(s string) bool {
if rc.Config.LogOutput {
rawLogger.Infof("%s", s)
} else {
rawLogger.Debugf("%s", s)
}
return true
})
username, password, err := rc.handleCredentials()
if err != nil {
return fmt.Errorf("failed to handle credentials: %s", err)
}
common.Logger(ctx).Infof("\U0001f680 Start image=%s", image)
name := rc.jobContainerName()
envList := make([]string, 0)
envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_TOOL_CACHE", "/opt/hostedtoolcache"))
envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_OS", "Linux"))
envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_TEMP", "/tmp"))
binds, mounts := rc.GetBindsAndMounts()
rc.JobContainer = container.NewContainer(&container.NewContainerInput{
Cmd: nil,
Entrypoint: []string{"/usr/bin/tail", "-f", "/dev/null"},
WorkingDir: rc.Config.ContainerWorkdir(),
Image: image,
Username: username,
Password: password,
Name: name,
Env: envList,
Mounts: mounts,
NetworkMode: "host",
Binds: binds,
Stdout: logWriter,
Stderr: logWriter,
Privileged: rc.Config.Privileged,
UsernsMode: rc.Config.UsernsMode,
Platform: rc.Config.ContainerArchitecture,
Hostname: hostname,
})
var copyWorkspace bool
var copyToPath string
if !rc.Config.BindWorkdir {
copyToPath, copyWorkspace = rc.localCheckoutPath()
copyToPath = filepath.Join(rc.Config.ContainerWorkdir(), copyToPath)
}
return common.NewPipelineExecutor(
rc.JobContainer.Pull(rc.Config.ForcePull),
rc.stopJobContainer(),
rc.JobContainer.Create(rc.Config.ContainerCapAdd, rc.Config.ContainerCapDrop),
rc.JobContainer.Start(false),
rc.JobContainer.UpdateFromImageEnv(&rc.Env),
rc.JobContainer.UpdateFromEnv("/etc/environment", &rc.Env),
rc.JobContainer.Exec([]string{"mkdir", "-m", "0777", "-p", ActPath}, rc.Env, "root", ""),
rc.JobContainer.CopyDir(copyToPath, rc.Config.Workdir+string(filepath.Separator)+".", rc.Config.UseGitIgnore).IfBool(copyWorkspace),
rc.JobContainer.Copy(ActPath+"/", &container.FileEntry{
Name: "workflow/event.json",
Mode: 0644,
Body: rc.EventJSON,
}, &container.FileEntry{
Name: "workflow/envs.txt",
Mode: 0666,
Body: "",
}, &container.FileEntry{
Name: "workflow/paths.txt",
Mode: 0666,
Body: "",
}),
)(ctx)
}
}
func (rc *RunContext) execJobContainer(cmd []string, env map[string]string, user, workdir string) common.Executor {
return func(ctx context.Context) error {
return rc.JobContainer.Exec(cmd, env, user, workdir)(ctx)
}
}
// stopJobContainer removes the job container (if it exists) and its volume (if it exists) if !rc.Config.ReuseContainers
func (rc *RunContext) stopJobContainer() common.Executor {
return func(ctx context.Context) error {
if rc.JobContainer != nil && !rc.Config.ReuseContainers {
return rc.JobContainer.Remove().
Then(container.NewDockerVolumeRemoveExecutor(rc.jobContainerName(), false))(ctx)
}
return nil
}
}
// Prepare the mounts and binds for the worker
// ActionCacheDir is for rc
func (rc *RunContext) ActionCacheDir() string {
var xdgCache string
var ok bool
if xdgCache, ok = os.LookupEnv("XDG_CACHE_HOME"); !ok || xdgCache == "" {
if home, err := homedir.Dir(); err == nil {
xdgCache = filepath.Join(home, ".cache")
} else if xdgCache, err = filepath.Abs("."); err != nil {
log.Fatal(err)
}
}
return filepath.Join(xdgCache, "act")
}
// Interpolate outputs after a job is done
func (rc *RunContext) interpolateOutputs() common.Executor {
return func(ctx context.Context) error {
ee := rc.NewExpressionEvaluator()
for k, v := range rc.Run.Job().Outputs {
interpolated := ee.Interpolate(v)
if v != interpolated {
rc.Run.Job().Outputs[k] = interpolated
}
}
return nil
}
}
func (rc *RunContext) startContainer() common.Executor {
return rc.startJobContainer()
}
func (rc *RunContext) stopContainer() common.Executor {
return rc.stopJobContainer()
}
func (rc *RunContext) closeContainer() common.Executor {
return func(ctx context.Context) error {
if rc.JobContainer != nil {
return rc.JobContainer.Close()(ctx)
}
return nil
}
}
func (rc *RunContext) matrix() map[string]interface{} {
return rc.Matrix
}
func (rc *RunContext) result(result string) {
rc.Run.Job().Result = result
}
func (rc *RunContext) steps() []*model.Step {
return rc.Run.Job().Steps
}
// Executor returns a pipeline executor for all the steps in the job
func (rc *RunContext) Executor() common.Executor {
return func(ctx context.Context) error {
isEnabled, err := rc.isEnabled(ctx)
if err != nil {
return err
}
if isEnabled {
return newJobExecutor(rc)(ctx)
}
return nil
}
}
// Executor returns a pipeline executor for all the steps in the job
func (rc *RunContext) CompositeExecutor() common.Executor {
steps := make([]common.Executor, 0)
for i, step := range rc.Composite.Runs.Steps {
if step.ID == "" {
step.ID = fmt.Sprintf("%d", i)
}
stepcopy := step
stepExec := rc.newStepExecutor(&stepcopy)
steps = append(steps, func(ctx context.Context) error {
err := stepExec(ctx)
if err != nil {
common.Logger(ctx).Errorf("%v", err)
common.SetJobError(ctx, err)
} else if ctx.Err() != nil {
common.Logger(ctx).Errorf("%v", ctx.Err())
common.SetJobError(ctx, ctx.Err())
}
return nil
})
}
steps = append(steps, common.JobError)
return func(ctx context.Context) error {
return common.NewPipelineExecutor(steps...)(common.WithJobErrorContainer(ctx))
}
}
func (rc *RunContext) newStepExecutor(step *model.Step) common.Executor {
sc := &StepContext{
RunContext: rc,
Step: step,
}
return func(ctx context.Context) error {
rc.CurrentStep = sc.Step.ID
rc.StepResults[rc.CurrentStep] = &model.StepResult{
Outcome: model.StepStatusSuccess,
Conclusion: model.StepStatusSuccess,
Outputs: make(map[string]string),
}
runStep, err := sc.isEnabled(ctx)
if err != nil {
rc.StepResults[rc.CurrentStep].Conclusion = model.StepStatusFailure
rc.StepResults[rc.CurrentStep].Outcome = model.StepStatusFailure
return err
}
if !runStep {
log.Debugf("Skipping step '%s' due to '%s'", sc.Step.String(), sc.Step.If.Value)
rc.StepResults[rc.CurrentStep].Conclusion = model.StepStatusSkipped
rc.StepResults[rc.CurrentStep].Outcome = model.StepStatusSkipped
return nil
}
exprEval, err := sc.setupEnv(ctx)
if err != nil {
return err
}
rc.ExprEval = exprEval
common.Logger(ctx).Infof("\u2B50 Run %s", sc.Step)
err = sc.Executor(ctx)(ctx)
if err == nil {
common.Logger(ctx).Infof(" \u2705 Success - %s", sc.Step)
} else {
common.Logger(ctx).Errorf(" \u274C Failure - %s", sc.Step)
rc.StepResults[rc.CurrentStep].Outcome = model.StepStatusFailure
if sc.Step.ContinueOnError {
common.Logger(ctx).Infof("Failed but continue next step")
err = nil
rc.StepResults[rc.CurrentStep].Conclusion = model.StepStatusSuccess
} else {
rc.StepResults[rc.CurrentStep].Conclusion = model.StepStatusFailure
}
}
return err
}
}
func (rc *RunContext) platformImage() string {
job := rc.Run.Job()
c := job.Container()
if c != nil {
return rc.ExprEval.Interpolate(c.Image)
}
if job.RunsOn() == nil {
log.Errorf("'runs-on' key not defined in %s", rc.String())
}
for _, runnerLabel := range job.RunsOn() {
platformName := rc.ExprEval.Interpolate(runnerLabel)
image := rc.Config.Platforms[strings.ToLower(platformName)]
if image != "" {
return image
}
}
return ""
}
func (rc *RunContext) hostname() string {
job := rc.Run.Job()
c := job.Container()
if c == nil {
return ""
}
optionsFlags := pflag.NewFlagSet("container_options", pflag.ContinueOnError)
hostname := optionsFlags.StringP("hostname", "h", "", "")
optionsArgs, err := shlex.Split(c.Options)
if err != nil {
log.Warnf("Cannot parse container options: %s", c.Options)
return ""
}
err = optionsFlags.Parse(optionsArgs)
if err != nil {
log.Warnf("Cannot parse container options: %s", c.Options)
return ""
}
return *hostname
}
func (rc *RunContext) isEnabled(ctx context.Context) (bool, error) {
job := rc.Run.Job()
l := common.Logger(ctx)
runJob, err := EvalBool(rc.ExprEval, job.If.Value)
if err != nil {
return false, fmt.Errorf(" \u274C Error in if-expression: \"if: %s\" (%s)", job.If.Value, err)
}
if !runJob {
l.Debugf("Skipping job '%s' due to '%s'", job.Name, job.If.Value)
return false, nil
}
img := rc.platformImage()
if img == "" {
if job.RunsOn() == nil {
log.Errorf("'runs-on' key not defined in %s", rc.String())
}
for _, runnerLabel := range job.RunsOn() {
platformName := rc.ExprEval.Interpolate(runnerLabel)
l.Infof("\U0001F6A7 Skipping unsupported platform -- Try running with `-P %+v=...`", platformName)
}
return false, nil
}
return true, nil
}
func mergeMaps(maps ...map[string]string) map[string]string {
rtnMap := make(map[string]string)
for _, m := range maps {
for k, v := range m {
rtnMap[k] = v
}
}
return rtnMap
}
func createContainerName(parts ...string) string {
name := make([]string, 0)
pattern := regexp.MustCompile("[^a-zA-Z0-9]")
partLen := (30 / len(parts)) - 1
for i, part := range parts {
if i == len(parts)-1 {
name = append(name, pattern.ReplaceAllString(part, "-"))
} else {
// If any part has a '-<number>' on the end it is likely part of a matrix job.
// Let's preserve the number to prevent clashes in container names.
re := regexp.MustCompile("-[0-9]+$")
num := re.FindStringSubmatch(part)
if len(num) > 0 {
name = append(name, trimToLen(pattern.ReplaceAllString(part, "-"), partLen-len(num[0])))
name = append(name, num[0])
} else {
name = append(name, trimToLen(pattern.ReplaceAllString(part, "-"), partLen))
}
}
}
return strings.ReplaceAll(strings.Trim(strings.Join(name, "-"), "-"), "--", "-")
}
func trimToLen(s string, l int) string {
if l < 0 {
l = 0
}
if len(s) > l {
return s[:l]
}
return s
}
func (rc *RunContext) getJobContext() *model.JobContext {
jobStatus := "success"
for _, stepStatus := range rc.StepResults {
if stepStatus.Conclusion == model.StepStatusFailure {
jobStatus = "failure"
break
}
}
return &model.JobContext{
Status: jobStatus,
}
}
func (rc *RunContext) getStepsContext() map[string]*model.StepResult {
return rc.StepResults
}
func (rc *RunContext) getGithubContext() *model.GithubContext {
ghc := &model.GithubContext{
Event: make(map[string]interface{}),
EventPath: ActPath + "/workflow/event.json",
Workflow: rc.Run.Workflow.Name,
RunID: rc.Config.Env["GITHUB_RUN_ID"],
RunNumber: rc.Config.Env["GITHUB_RUN_NUMBER"],
Actor: rc.Config.Actor,
EventName: rc.Config.EventName,
Workspace: rc.Config.ContainerWorkdir(),
Action: rc.CurrentStep,
Token: rc.Config.Secrets["GITHUB_TOKEN"],
ActionPath: rc.ActionPath,
ActionRef: rc.ActionRef,
ActionRepository: rc.ActionRepository,
RepositoryOwner: rc.Config.Env["GITHUB_REPOSITORY_OWNER"],
RetentionDays: rc.Config.Env["GITHUB_RETENTION_DAYS"],
RunnerPerflog: rc.Config.Env["RUNNER_PERFLOG"],
RunnerTrackingID: rc.Config.Env["RUNNER_TRACKING_ID"],
}
if ghc.RunID == "" {
ghc.RunID = "1"
}
if ghc.RunNumber == "" {
ghc.RunNumber = "1"
}
if ghc.RetentionDays == "" {
ghc.RetentionDays = "0"
}
if ghc.RunnerPerflog == "" {
ghc.RunnerPerflog = "/dev/null"
}
// Backwards compatibility for configs that require
// a default rather than being run as a cmd
if ghc.Actor == "" {
ghc.Actor = "nektos/act"
}
repoPath := rc.Config.Workdir
repo, err := common.FindGithubRepo(repoPath, rc.Config.GitHubInstance)
if err != nil {
log.Warningf("unable to get git repo: %v", err)
} else {
ghc.Repository = repo
if ghc.RepositoryOwner == "" {
ghc.RepositoryOwner = strings.Split(repo, "/")[0]
}
}
if rc.EventJSON != "" {
err = json.Unmarshal([]byte(rc.EventJSON), &ghc.Event)
if err != nil {
log.Errorf("Unable to Unmarshal event '%s': %v", rc.EventJSON, err)
}
}
if ghc.EventName == "pull_request" {
ghc.BaseRef = asString(nestedMapLookup(ghc.Event, "pull_request", "base", "ref"))
ghc.HeadRef = asString(nestedMapLookup(ghc.Event, "pull_request", "head", "ref"))
}
ghc.SetRefAndSha(rc.Config.DefaultBranch, repoPath)
return ghc
}
func isLocalCheckout(ghc *model.GithubContext, step *model.Step) bool {
if step.Type() == model.StepTypeInvalid {
// This will be errored out by the executor later, we need this here to avoid a null panic though
return false
}
if step.Type() != model.StepTypeUsesActionRemote {
return false
}
remoteAction := newRemoteAction(step.Uses)
if remoteAction == nil {
// IsCheckout() will nil panic if we dont bail out early
return false
}
if !remoteAction.IsCheckout() {
return false
}
if repository, ok := step.With["repository"]; ok && repository != ghc.Repository {
return false
}
if repository, ok := step.With["ref"]; ok && repository != ghc.Ref {
return false
}
return true
}
func asString(v interface{}) string {
if v == nil {
return ""
} else if s, ok := v.(string); ok {
return s
}
return ""
}
func nestedMapLookup(m map[string]interface{}, ks ...string) (rval interface{}) {
var ok bool
if len(ks) == 0 { // degenerate input
return nil
}
if rval, ok = m[ks[0]]; !ok {
return nil
} else if len(ks) == 1 { // we've reached the final key
return rval
} else if m, ok = rval.(map[string]interface{}); !ok {
return nil
} else { // 1+ more keys
return nestedMapLookup(m, ks[1:]...)
}
}
func (rc *RunContext) withGithubEnv(env map[string]string) map[string]string {
github := rc.getGithubContext()
env["CI"] = "true"
env["GITHUB_ENV"] = ActPath + "/workflow/envs.txt"
env["GITHUB_PATH"] = ActPath + "/workflow/paths.txt"
env["GITHUB_WORKFLOW"] = github.Workflow
env["GITHUB_RUN_ID"] = github.RunID
env["GITHUB_RUN_NUMBER"] = github.RunNumber
env["GITHUB_ACTION"] = github.Action
env["GITHUB_ACTION_PATH"] = github.ActionPath
env["GITHUB_ACTION_REPOSITORY"] = github.ActionRepository
env["GITHUB_ACTION_REF"] = github.ActionRef
env["GITHUB_ACTIONS"] = "true"
env["GITHUB_ACTOR"] = github.Actor
env["GITHUB_REPOSITORY"] = github.Repository
env["GITHUB_EVENT_NAME"] = github.EventName
env["GITHUB_EVENT_PATH"] = github.EventPath
env["GITHUB_WORKSPACE"] = github.Workspace
env["GITHUB_SHA"] = github.Sha
env["GITHUB_REF"] = github.Ref
env["GITHUB_TOKEN"] = github.Token
env["GITHUB_SERVER_URL"] = "https://github.com"
env["GITHUB_API_URL"] = "https://api.github.com"
env["GITHUB_GRAPHQL_URL"] = "https://api.github.com/graphql"
env["GITHUB_ACTION_REF"] = github.ActionRef
env["GITHUB_ACTION_REPOSITORY"] = github.ActionRepository
env["GITHUB_BASE_REF"] = github.BaseRef
env["GITHUB_HEAD_REF"] = github.HeadRef
env["GITHUB_JOB"] = rc.JobName
env["GITHUB_REPOSITORY_OWNER"] = github.RepositoryOwner
env["GITHUB_RETENTION_DAYS"] = github.RetentionDays
env["RUNNER_PERFLOG"] = github.RunnerPerflog
env["RUNNER_TRACKING_ID"] = github.RunnerTrackingID
if rc.Config.GitHubInstance != "github.com" {
env["GITHUB_SERVER_URL"] = fmt.Sprintf("https://%s", rc.Config.GitHubInstance)
env["GITHUB_API_URL"] = fmt.Sprintf("https://%s/api/v3", rc.Config.GitHubInstance)
env["GITHUB_GRAPHQL_URL"] = fmt.Sprintf("https://%s/api/graphql", rc.Config.GitHubInstance)
}
if rc.Config.ArtifactServerPath != "" {
setActionRuntimeVars(rc, env)
}
job := rc.Run.Job()
if job.RunsOn() != nil {
for _, runnerLabel := range job.RunsOn() {
platformName := rc.ExprEval.Interpolate(runnerLabel)
if platformName != "" {
if platformName == "ubuntu-latest" {
// hardcode current ubuntu-latest since we have no way to check that 'on the fly'
env["ImageOS"] = "ubuntu20"
} else {
platformName = strings.SplitN(strings.Replace(platformName, `-`, ``, 1), `.`, 2)[0]
env["ImageOS"] = platformName
}
}
}
}
return env
}
func setActionRuntimeVars(rc *RunContext, env map[string]string) {
actionsRuntimeURL := os.Getenv("ACTIONS_RUNTIME_URL")
if actionsRuntimeURL == "" {
actionsRuntimeURL = fmt.Sprintf("http://%s:%s/", common.GetOutboundIP().String(), rc.Config.ArtifactServerPort)
}
env["ACTIONS_RUNTIME_URL"] = actionsRuntimeURL
actionsRuntimeToken := os.Getenv("ACTIONS_RUNTIME_TOKEN")
if actionsRuntimeToken == "" {
actionsRuntimeToken = "token"
}
env["ACTIONS_RUNTIME_TOKEN"] = actionsRuntimeToken
}
func (rc *RunContext) localCheckoutPath() (string, bool) {
ghContext := rc.getGithubContext()
for _, step := range rc.Run.Job().Steps {
if isLocalCheckout(ghContext, step) {
return step.With["path"], true
}
}
return "", false
}
func (rc *RunContext) handleCredentials() (username, password string, err error) {
// TODO: remove below 2 lines when we can release act with breaking changes
username = rc.Config.Secrets["DOCKER_USERNAME"]
password = rc.Config.Secrets["DOCKER_PASSWORD"]
container := rc.Run.Job().Container()
if container == nil || container.Credentials == nil {
return
}
if container.Credentials != nil && len(container.Credentials) != 2 {
err = fmt.Errorf("invalid property count for key 'credentials:'")
return
}
ee := rc.NewExpressionEvaluator()
if username = ee.Interpolate(container.Credentials["username"]); username == "" {
err = fmt.Errorf("failed to interpolate container.credentials.username")
return
}
if password = ee.Interpolate(container.Credentials["password"]); password == "" {
err = fmt.Errorf("failed to interpolate container.credentials.password")
return
}
if container.Credentials["username"] == "" || container.Credentials["password"] == "" {
err = fmt.Errorf("container.credentials cannot be empty")
return
}
return username, password, err
}