672 lines
19 KiB
Go
672 lines
19 KiB
Go
package runner
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import (
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"context"
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"encoding/json"
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"fmt"
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"os"
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"path/filepath"
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"regexp"
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"runtime"
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"strings"
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"github.com/mitchellh/go-homedir"
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"github.com/opencontainers/selinux/go-selinux"
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log "github.com/sirupsen/logrus"
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"github.com/nektos/act/pkg/common"
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"github.com/nektos/act/pkg/common/git"
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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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const ActPath string = "/var/run/act"
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// RunContext contains info about current job
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type RunContext struct {
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Name string
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Config *Config
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Matrix map[string]interface{}
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Run *model.Run
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EventJSON string
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Env map[string]string
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ExtraPath []string
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CurrentStep string
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StepResults map[string]*model.StepResult
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ExprEval ExpressionEvaluator
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JobContainer container.Container
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OutputMappings map[MappableOutput]MappableOutput
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JobName string
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ActionPath string
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Parent *RunContext
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Masks []string
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}
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func (rc *RunContext) AddMask(mask string) {
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rc.Masks = append(rc.Masks, mask)
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}
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type MappableOutput struct {
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StepID string
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OutputName string
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}
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func (rc *RunContext) String() string {
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return fmt.Sprintf("%s/%s", rc.Run.Workflow.Name, rc.Name)
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}
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// GetEnv returns the env for the context
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func (rc *RunContext) GetEnv() map[string]string {
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if rc.Env == nil {
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rc.Env = mergeMaps(rc.Run.Workflow.Env, rc.Run.Job().Environment(), rc.Config.Env)
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}
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rc.Env["ACT"] = "true"
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return rc.Env
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}
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func (rc *RunContext) jobContainerName() string {
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return createContainerName(rc.Config.ContainerNamePrefix, rc.String())
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}
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// Returns the binds and mounts for the container, resolving paths as appopriate
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func (rc *RunContext) GetBindsAndMounts() ([]string, map[string]string) {
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name := rc.jobContainerName()
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if rc.Config.ContainerDaemonSocket == "" {
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rc.Config.ContainerDaemonSocket = "/var/run/docker.sock"
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}
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binds := []string{
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fmt.Sprintf("%s:%s", rc.Config.ContainerDaemonSocket, "/var/run/docker.sock"),
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}
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mounts := map[string]string{
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"act-toolcache": "/toolcache",
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name + "-env": ActPath,
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}
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if job := rc.Run.Job(); job != nil {
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if container := job.Container(); container != nil {
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for _, v := range container.Volumes {
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if !strings.Contains(v, ":") || filepath.IsAbs(v) {
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// Bind anonymous volume or host file.
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binds = append(binds, v)
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} else {
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// Mount existing volume.
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paths := strings.SplitN(v, ":", 2)
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mounts[paths[0]] = paths[1]
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}
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}
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}
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}
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if rc.Config.BindWorkdir {
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bindModifiers := ""
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if runtime.GOOS == "darwin" {
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bindModifiers = ":delegated"
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}
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if selinux.GetEnabled() {
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bindModifiers = ":z"
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}
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binds = append(binds, fmt.Sprintf("%s:%s%s", rc.Config.Workdir, rc.Config.ContainerWorkdir(), bindModifiers))
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} else {
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mounts[name] = rc.Config.ContainerWorkdir()
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}
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return binds, mounts
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}
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func (rc *RunContext) startJobContainer() common.Executor {
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return func(ctx context.Context) error {
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logger := common.Logger(ctx)
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image := rc.platformImage(ctx)
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rawLogger := logger.WithField("raw_output", true)
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logWriter := common.NewLineWriter(rc.commandHandler(ctx), func(s string) bool {
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if rc.Config.LogOutput {
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rawLogger.Infof("%s", s)
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} else {
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rawLogger.Debugf("%s", s)
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}
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return true
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})
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username, password, err := rc.handleCredentials(ctx)
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if err != nil {
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return fmt.Errorf("failed to handle credentials: %s", err)
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}
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logger.Infof("\U0001f680 Start image=%s", image)
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name := rc.jobContainerName()
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envList := make([]string, 0)
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envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_TOOL_CACHE", "/opt/hostedtoolcache"))
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envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_OS", "Linux"))
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envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_ARCH", container.RunnerArch(ctx)))
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envList = append(envList, fmt.Sprintf("%s=%s", "RUNNER_TEMP", "/tmp"))
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binds, mounts := rc.GetBindsAndMounts()
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rc.JobContainer = container.NewContainer(&container.NewContainerInput{
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Cmd: nil,
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Entrypoint: []string{"/usr/bin/tail", "-f", "/dev/null"},
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WorkingDir: rc.Config.ContainerWorkdir(),
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Image: image,
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Username: username,
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Password: password,
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Name: name,
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Env: envList,
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Mounts: mounts,
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NetworkMode: "host",
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Binds: binds,
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Stdout: logWriter,
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Stderr: logWriter,
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Privileged: rc.Config.Privileged,
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UsernsMode: rc.Config.UsernsMode,
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Platform: rc.Config.ContainerArchitecture,
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Options: rc.options(ctx),
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})
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return common.NewPipelineExecutor(
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rc.JobContainer.Pull(rc.Config.ForcePull),
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rc.stopJobContainer(),
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rc.JobContainer.Create(rc.Config.ContainerCapAdd, rc.Config.ContainerCapDrop),
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rc.JobContainer.Start(false),
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rc.JobContainer.UpdateFromImageEnv(&rc.Env),
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rc.JobContainer.UpdateFromEnv("/etc/environment", &rc.Env),
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rc.JobContainer.Copy(ActPath+"/", &container.FileEntry{
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Name: "workflow/event.json",
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Mode: 0o644,
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Body: rc.EventJSON,
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}, &container.FileEntry{
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Name: "workflow/envs.txt",
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Mode: 0o666,
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Body: "",
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}, &container.FileEntry{
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Name: "workflow/paths.txt",
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Mode: 0o666,
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Body: "",
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}),
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)(ctx)
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}
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}
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func (rc *RunContext) execJobContainer(cmd []string, env map[string]string, user, workdir string) common.Executor {
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return func(ctx context.Context) error {
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return rc.JobContainer.Exec(cmd, env, user, workdir)(ctx)
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}
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}
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// stopJobContainer removes the job container (if it exists) and its volume (if it exists) if !rc.Config.ReuseContainers
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func (rc *RunContext) stopJobContainer() common.Executor {
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return func(ctx context.Context) error {
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if rc.JobContainer != nil && !rc.Config.ReuseContainers {
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return rc.JobContainer.Remove().
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Then(container.NewDockerVolumeRemoveExecutor(rc.jobContainerName(), false)).
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Then(container.NewDockerVolumeRemoveExecutor(rc.jobContainerName()+"-env", false))(ctx)
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}
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return nil
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}
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}
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// Prepare the mounts and binds for the worker
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// ActionCacheDir is for rc
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func (rc *RunContext) ActionCacheDir() string {
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var xdgCache string
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var ok bool
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if xdgCache, ok = os.LookupEnv("XDG_CACHE_HOME"); !ok || xdgCache == "" {
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if home, err := homedir.Dir(); err == nil {
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xdgCache = filepath.Join(home, ".cache")
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} else if xdgCache, err = filepath.Abs("."); err != nil {
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log.Fatal(err)
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}
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}
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return filepath.Join(xdgCache, "act")
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}
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// Interpolate outputs after a job is done
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func (rc *RunContext) interpolateOutputs() common.Executor {
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return func(ctx context.Context) error {
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ee := rc.NewExpressionEvaluator(ctx)
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for k, v := range rc.Run.Job().Outputs {
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interpolated := ee.Interpolate(ctx, v)
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if v != interpolated {
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rc.Run.Job().Outputs[k] = interpolated
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}
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}
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return nil
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}
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}
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func (rc *RunContext) startContainer() common.Executor {
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return rc.startJobContainer()
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}
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func (rc *RunContext) stopContainer() common.Executor {
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return rc.stopJobContainer()
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}
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func (rc *RunContext) closeContainer() common.Executor {
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return func(ctx context.Context) error {
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if rc.JobContainer != nil {
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return rc.JobContainer.Close()(ctx)
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}
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return nil
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}
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}
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func (rc *RunContext) matrix() map[string]interface{} {
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return rc.Matrix
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}
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func (rc *RunContext) result(result string) {
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rc.Run.Job().Result = result
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}
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func (rc *RunContext) steps() []*model.Step {
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return rc.Run.Job().Steps
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}
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// Executor returns a pipeline executor for all the steps in the job
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func (rc *RunContext) Executor() common.Executor {
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return func(ctx context.Context) error {
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isEnabled, err := rc.isEnabled(ctx)
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if err != nil {
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return err
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}
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if isEnabled {
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return newJobExecutor(rc, &stepFactoryImpl{}, rc)(ctx)
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}
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return nil
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}
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}
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func (rc *RunContext) platformImage(ctx context.Context) string {
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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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return rc.ExprEval.Interpolate(ctx, c.Image)
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}
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if job.RunsOn() == nil {
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common.Logger(ctx).Errorf("'runs-on' key not defined in %s", rc.String())
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}
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for _, runnerLabel := range job.RunsOn() {
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platformName := rc.ExprEval.Interpolate(ctx, runnerLabel)
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image := rc.Config.Platforms[strings.ToLower(platformName)]
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if image != "" {
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return image
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}
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}
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return ""
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}
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func (rc *RunContext) options(ctx context.Context) string {
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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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return ""
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}
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return c.Options
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}
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func (rc *RunContext) isEnabled(ctx context.Context) (bool, error) {
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job := rc.Run.Job()
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l := common.Logger(ctx)
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runJob, err := EvalBool(ctx, rc.ExprEval, job.If.Value, exprparser.DefaultStatusCheckSuccess)
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if err != nil {
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return false, fmt.Errorf(" \u274C Error in if-expression: \"if: %s\" (%s)", job.If.Value, err)
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}
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if !runJob {
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l.WithField("jobResult", "skipped").Debugf("Skipping job '%s' due to '%s'", job.Name, job.If.Value)
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return false, nil
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}
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img := rc.platformImage(ctx)
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if img == "" {
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if job.RunsOn() == nil {
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l.Errorf("'runs-on' key not defined in %s", rc.String())
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}
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for _, runnerLabel := range job.RunsOn() {
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platformName := rc.ExprEval.Interpolate(ctx, runnerLabel)
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l.Infof("\U0001F6A7 Skipping unsupported platform -- Try running with `-P %+v=...`", platformName)
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}
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return false, nil
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}
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return true, nil
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}
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func mergeMaps(maps ...map[string]string) map[string]string {
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rtnMap := make(map[string]string)
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for _, m := range maps {
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for k, v := range m {
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rtnMap[k] = v
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}
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}
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return rtnMap
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}
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func createContainerName(parts ...string) string {
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name := make([]string, 0)
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pattern := regexp.MustCompile("[^a-zA-Z0-9]")
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partLen := (30 / len(parts)) - 1
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for i, part := range parts {
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if i == len(parts)-1 {
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name = append(name, pattern.ReplaceAllString(part, "-"))
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} else {
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// If any part has a '-<number>' on the end it is likely part of a matrix job.
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// Let's preserve the number to prevent clashes in container names.
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re := regexp.MustCompile("-[0-9]+$")
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num := re.FindStringSubmatch(part)
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if len(num) > 0 {
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name = append(name, trimToLen(pattern.ReplaceAllString(part, "-"), partLen-len(num[0])))
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name = append(name, num[0])
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} else {
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name = append(name, trimToLen(pattern.ReplaceAllString(part, "-"), partLen))
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}
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}
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}
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return strings.ReplaceAll(strings.Trim(strings.Join(name, "-"), "-"), "--", "-")
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}
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func trimToLen(s string, l int) string {
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if l < 0 {
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l = 0
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}
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if len(s) > l {
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return s[:l]
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}
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return s
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}
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func (rc *RunContext) getJobContext() *model.JobContext {
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jobStatus := "success"
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for _, stepStatus := range rc.StepResults {
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if stepStatus.Conclusion == model.StepStatusFailure {
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jobStatus = "failure"
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break
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}
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}
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return &model.JobContext{
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Status: jobStatus,
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}
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}
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func (rc *RunContext) getStepsContext() map[string]*model.StepResult {
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return rc.StepResults
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}
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func (rc *RunContext) getGithubContext(ctx context.Context) *model.GithubContext {
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logger := common.Logger(ctx)
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ghc := &model.GithubContext{
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Event: make(map[string]interface{}),
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EventPath: ActPath + "/workflow/event.json",
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Workflow: rc.Run.Workflow.Name,
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RunID: rc.Config.Env["GITHUB_RUN_ID"],
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RunNumber: rc.Config.Env["GITHUB_RUN_NUMBER"],
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Actor: rc.Config.Actor,
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EventName: rc.Config.EventName,
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Workspace: rc.Config.ContainerWorkdir(),
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Action: rc.CurrentStep,
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Token: rc.Config.Token,
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ActionPath: rc.ActionPath,
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RepositoryOwner: rc.Config.Env["GITHUB_REPOSITORY_OWNER"],
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RetentionDays: rc.Config.Env["GITHUB_RETENTION_DAYS"],
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RunnerPerflog: rc.Config.Env["RUNNER_PERFLOG"],
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RunnerTrackingID: rc.Config.Env["RUNNER_TRACKING_ID"],
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}
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if ghc.RunID == "" {
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ghc.RunID = "1"
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}
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if ghc.RunNumber == "" {
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ghc.RunNumber = "1"
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}
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if ghc.RetentionDays == "" {
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ghc.RetentionDays = "0"
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}
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if ghc.RunnerPerflog == "" {
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ghc.RunnerPerflog = "/dev/null"
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}
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// Backwards compatibility for configs that require
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// a default rather than being run as a cmd
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if ghc.Actor == "" {
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ghc.Actor = "nektos/act"
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}
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if preset := rc.Config.PresetGitHubContext; preset != nil {
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ghc.Event = preset.Event
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ghc.RunID = preset.RunID
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ghc.RunNumber = preset.RunNumber
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ghc.Actor = preset.Actor
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ghc.Repository = preset.Repository
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ghc.EventName = preset.EventName
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ghc.Sha = preset.Sha
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ghc.Ref = preset.Ref
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ghc.RefName = preset.RefName
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ghc.RefType = preset.RefType
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ghc.HeadRef = preset.HeadRef
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ghc.BaseRef = preset.BaseRef
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ghc.Token = preset.Token
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ghc.RepositoryOwner = preset.RepositoryOwner
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ghc.RetentionDays = preset.RetentionDays
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return ghc
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}
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repoPath := rc.Config.Workdir
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repo, err := git.FindGithubRepo(ctx, repoPath, rc.Config.GitHubInstance, rc.Config.RemoteName)
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if err != nil {
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logger.Warningf("unable to get git repo: %v", err)
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} else {
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ghc.Repository = repo
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if ghc.RepositoryOwner == "" {
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ghc.RepositoryOwner = strings.Split(repo, "/")[0]
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}
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}
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if rc.EventJSON != "" {
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err = json.Unmarshal([]byte(rc.EventJSON), &ghc.Event)
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if err != nil {
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logger.Errorf("Unable to Unmarshal event '%s': %v", rc.EventJSON, err)
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}
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}
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if ghc.EventName == "pull_request" || ghc.EventName == "pull_request_target" {
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ghc.BaseRef = asString(nestedMapLookup(ghc.Event, "pull_request", "base", "ref"))
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ghc.HeadRef = asString(nestedMapLookup(ghc.Event, "pull_request", "head", "ref"))
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}
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ghc.SetRefAndSha(ctx, rc.Config.DefaultBranch, repoPath)
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// https://docs.github.com/en/actions/learn-github-actions/environment-variables
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if strings.HasPrefix(ghc.Ref, "refs/tags/") {
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ghc.RefType = "tag"
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ghc.RefName = ghc.Ref[len("refs/tags/"):]
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} else if strings.HasPrefix(ghc.Ref, "refs/heads/") {
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ghc.RefType = "branch"
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ghc.RefName = ghc.Ref[len("refs/heads/"):]
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}
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return ghc
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}
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func isLocalCheckout(ghc *model.GithubContext, step *model.Step) bool {
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if step.Type() == model.StepTypeInvalid {
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// This will be errored out by the executor later, we need this here to avoid a null panic though
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return false
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}
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if step.Type() != model.StepTypeUsesActionRemote {
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return false
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}
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remoteAction := newRemoteAction(step.Uses)
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if remoteAction == nil {
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// IsCheckout() will nil panic if we dont bail out early
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return false
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}
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if !remoteAction.IsCheckout() {
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return false
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}
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|
|
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(ctx context.Context, github *model.GithubContext, env map[string]string) map[string]string {
|
|
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_REF_NAME"] = github.RefName
|
|
env["GITHUB_REF_TYPE"] = github.RefType
|
|
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_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" {
|
|
hasProtocol := strings.HasPrefix(rc.Config.GitHubInstance, "http://") || strings.HasPrefix(rc.Config.GitHubInstance, "https://")
|
|
if hasProtocol {
|
|
env["GITHUB_SERVER_URL"] = rc.Config.GitHubInstance
|
|
env["GITHUB_API_URL"] = fmt.Sprintf("%s/api/v1", rc.Config.GitHubInstance) // FIXME: gitea is v1 not v3
|
|
env["GITHUB_GRAPHQL_URL"] = fmt.Sprintf("%s/api/graphql", rc.Config.GitHubInstance)
|
|
} else {
|
|
env["GITHUB_SERVER_URL"] = fmt.Sprintf("https://%s", rc.Config.GitHubInstance)
|
|
env["GITHUB_API_URL"] = fmt.Sprintf("https://%s/api/v1", 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(ctx, 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) handleCredentials(ctx context.Context) (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(ctx)
|
|
if username = ee.Interpolate(ctx, container.Credentials["username"]); username == "" {
|
|
err = fmt.Errorf("failed to interpolate container.credentials.username")
|
|
return
|
|
}
|
|
if password = ee.Interpolate(ctx, 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
|
|
}
|