618 lines
19 KiB
Go
618 lines
19 KiB
Go
package runner
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import (
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"context"
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"embed"
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"fmt"
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"io"
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"io/fs"
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"os"
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"path"
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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/kballard/go-shellquote"
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"github.com/nektos/act/pkg/common"
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"github.com/nektos/act/pkg/container"
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"github.com/nektos/act/pkg/model"
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)
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type actionStep interface {
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step
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getActionModel() *model.Action
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getCompositeRunContext(context.Context) *RunContext
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getCompositeSteps() *compositeSteps
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}
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type readAction func(ctx context.Context, step *model.Step, actionDir string, actionPath string, readFile actionYamlReader, writeFile fileWriter) (*model.Action, error)
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type actionYamlReader func(filename string) (io.Reader, io.Closer, error)
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type fileWriter func(filename string, data []byte, perm fs.FileMode) error
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type runAction func(step actionStep, actionDir string, remoteAction *remoteAction) common.Executor
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//go:embed res/trampoline.js
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var trampoline embed.FS
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func readActionImpl(ctx context.Context, step *model.Step, actionDir string, actionPath string, readFile actionYamlReader, writeFile fileWriter) (*model.Action, error) {
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logger := common.Logger(ctx)
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reader, closer, err := readFile("action.yml")
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if os.IsNotExist(err) {
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reader, closer, err = readFile("action.yaml")
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if err != nil {
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if _, closer, err2 := readFile("Dockerfile"); err2 == nil {
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closer.Close()
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action := &model.Action{
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Name: "(Synthetic)",
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Runs: model.ActionRuns{
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Using: "docker",
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Image: "Dockerfile",
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},
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}
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logger.Debugf("Using synthetic action %v for Dockerfile", action)
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return action, nil
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}
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if step.With != nil {
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if val, ok := step.With["args"]; ok {
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var b []byte
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if b, err = trampoline.ReadFile("res/trampoline.js"); err != nil {
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return nil, err
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}
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err2 := writeFile(filepath.Join(actionDir, actionPath, "trampoline.js"), b, 0o400)
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if err2 != nil {
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return nil, err2
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}
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action := &model.Action{
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Name: "(Synthetic)",
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Inputs: map[string]model.Input{
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"cwd": {
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Description: "(Actual working directory)",
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Required: false,
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Default: filepath.Join(actionDir, actionPath),
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},
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"command": {
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Description: "(Actual program)",
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Required: false,
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Default: val,
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},
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},
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Runs: model.ActionRuns{
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Using: "node12",
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Main: "trampoline.js",
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},
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}
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logger.Debugf("Using synthetic action %v", action)
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return action, nil
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}
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}
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return nil, err
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}
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} else if err != nil {
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return nil, err
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}
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defer closer.Close()
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action, err := model.ReadAction(reader)
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logger.Debugf("Read action %v from '%s'", action, "Unknown")
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return action, err
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}
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func maybeCopyToActionDir(ctx context.Context, step actionStep, actionDir string, actionPath string, containerActionDir string) error {
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logger := common.Logger(ctx)
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rc := step.getRunContext()
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stepModel := step.getStepModel()
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if stepModel.Type() != model.StepTypeUsesActionRemote {
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return nil
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}
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if err := removeGitIgnore(ctx, actionDir); err != nil {
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return err
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}
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var containerActionDirCopy string
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containerActionDirCopy = strings.TrimSuffix(containerActionDir, actionPath)
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logger.Debug(containerActionDirCopy)
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if !strings.HasSuffix(containerActionDirCopy, `/`) {
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containerActionDirCopy += `/`
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}
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return rc.JobContainer.CopyDir(containerActionDirCopy, actionDir+"/", rc.Config.UseGitIgnore)(ctx)
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}
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func runActionImpl(step actionStep, actionDir string, remoteAction *remoteAction) common.Executor {
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rc := step.getRunContext()
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stepModel := step.getStepModel()
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return func(ctx context.Context) error {
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logger := common.Logger(ctx)
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actionPath := ""
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if remoteAction != nil && remoteAction.Path != "" {
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actionPath = remoteAction.Path
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}
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action := step.getActionModel()
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logger.Debugf("About to run action %v", action)
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err := setupActionEnv(ctx, step, remoteAction)
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if err != nil {
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return err
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}
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actionLocation := path.Join(actionDir, actionPath)
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actionName, containerActionDir := getContainerActionPaths(stepModel, actionLocation, rc)
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logger.Debugf("type=%v actionDir=%s actionPath=%s workdir=%s actionCacheDir=%s actionName=%s containerActionDir=%s", stepModel.Type(), actionDir, actionPath, rc.Config.Workdir, rc.ActionCacheDir(), actionName, containerActionDir)
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switch action.Runs.Using {
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case model.ActionRunsUsingNode12, model.ActionRunsUsingNode16, model.ActionRunsUsingNode20:
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if err := maybeCopyToActionDir(ctx, step, actionDir, actionPath, containerActionDir); err != nil {
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return err
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}
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containerArgs := []string{"node", path.Join(containerActionDir, action.Runs.Main)}
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logger.Debugf("executing remote job container: %s", containerArgs)
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rc.ApplyExtraPath(ctx, step.getEnv())
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return rc.execJobContainer(containerArgs, *step.getEnv(), "", "")(ctx)
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case model.ActionRunsUsingDocker:
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location := actionLocation
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if remoteAction == nil {
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location = containerActionDir
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}
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return execAsDocker(ctx, step, actionName, location, remoteAction == nil)
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case model.ActionRunsUsingComposite:
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if err := maybeCopyToActionDir(ctx, step, actionDir, actionPath, containerActionDir); err != nil {
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return err
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}
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return execAsComposite(step)(ctx)
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default:
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return fmt.Errorf(fmt.Sprintf("The runs.using key must be one of: %v, got %s", []string{
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model.ActionRunsUsingDocker,
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model.ActionRunsUsingNode12,
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model.ActionRunsUsingNode16,
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model.ActionRunsUsingNode20,
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model.ActionRunsUsingComposite,
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}, action.Runs.Using))
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}
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}
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}
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func setupActionEnv(ctx context.Context, step actionStep, _ *remoteAction) error {
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rc := step.getRunContext()
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// A few fields in the environment (e.g. GITHUB_ACTION_REPOSITORY)
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// are dependent on the action. That means we can complete the
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// setup only after resolving the whole action model and cloning
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// the action
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rc.withGithubEnv(ctx, step.getGithubContext(ctx), *step.getEnv())
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populateEnvsFromSavedState(step.getEnv(), step, rc)
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populateEnvsFromInput(ctx, step.getEnv(), step.getActionModel(), rc)
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return nil
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}
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// https://github.com/nektos/act/issues/228#issuecomment-629709055
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// files in .gitignore are not copied in a Docker container
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// this causes issues with actions that ignore other important resources
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// such as `node_modules` for example
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func removeGitIgnore(ctx context.Context, directory string) error {
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gitIgnorePath := path.Join(directory, ".gitignore")
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if _, err := os.Stat(gitIgnorePath); err == nil {
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// .gitignore exists
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common.Logger(ctx).Debugf("Removing %s before docker cp", gitIgnorePath)
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err := os.Remove(gitIgnorePath)
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if err != nil {
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return err
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}
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}
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return nil
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}
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// TODO: break out parts of function to reduce complexicity
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//
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//nolint:gocyclo
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func execAsDocker(ctx context.Context, step actionStep, actionName string, basedir string, localAction bool) error {
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logger := common.Logger(ctx)
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rc := step.getRunContext()
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action := step.getActionModel()
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var prepImage common.Executor
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var image string
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forcePull := false
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if strings.HasPrefix(action.Runs.Image, "docker://") {
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image = strings.TrimPrefix(action.Runs.Image, "docker://")
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// Apply forcePull only for prebuild docker images
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forcePull = rc.Config.ForcePull
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} else {
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// "-dockeraction" enshures that "./", "./test " won't get converted to "act-:latest", "act-test-:latest" which are invalid docker image names
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image = fmt.Sprintf("%s-dockeraction:%s", regexp.MustCompile("[^a-zA-Z0-9]").ReplaceAllString(actionName, "-"), "latest")
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image = fmt.Sprintf("act-%s", strings.TrimLeft(image, "-"))
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image = strings.ToLower(image)
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contextDir, fileName := filepath.Split(filepath.Join(basedir, action.Runs.Image))
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anyArchExists, err := container.ImageExistsLocally(ctx, image, "any")
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if err != nil {
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return err
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}
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correctArchExists, err := container.ImageExistsLocally(ctx, image, rc.Config.ContainerArchitecture)
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if err != nil {
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return err
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}
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if anyArchExists && !correctArchExists {
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wasRemoved, err := container.RemoveImage(ctx, image, true, true)
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if err != nil {
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return err
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}
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if !wasRemoved {
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return fmt.Errorf("failed to remove image '%s'", image)
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}
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}
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if !correctArchExists || rc.Config.ForceRebuild {
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logger.Debugf("image '%s' for architecture '%s' will be built from context '%s", image, rc.Config.ContainerArchitecture, contextDir)
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var buildContext io.ReadCloser
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if localAction {
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buildContext, err = rc.JobContainer.GetContainerArchive(ctx, contextDir+"/.")
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if err != nil {
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return err
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}
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defer buildContext.Close()
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}
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prepImage = container.NewDockerBuildExecutor(container.NewDockerBuildExecutorInput{
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ContextDir: contextDir,
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Dockerfile: fileName,
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ImageTag: image,
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BuildContext: buildContext,
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Platform: rc.Config.ContainerArchitecture,
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})
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} else {
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logger.Debugf("image '%s' for architecture '%s' already exists", image, rc.Config.ContainerArchitecture)
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}
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}
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eval := rc.NewStepExpressionEvaluator(ctx, step)
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cmd, err := shellquote.Split(eval.Interpolate(ctx, step.getStepModel().With["args"]))
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if err != nil {
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return err
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}
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if len(cmd) == 0 {
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cmd = action.Runs.Args
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evalDockerArgs(ctx, step, action, &cmd)
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}
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entrypoint := strings.Fields(eval.Interpolate(ctx, step.getStepModel().With["entrypoint"]))
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if len(entrypoint) == 0 {
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if action.Runs.Entrypoint != "" {
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entrypoint, err = shellquote.Split(action.Runs.Entrypoint)
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if err != nil {
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return err
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}
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} else {
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entrypoint = nil
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}
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}
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stepContainer := newStepContainer(ctx, step, image, cmd, entrypoint)
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return common.NewPipelineExecutor(
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prepImage,
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stepContainer.Pull(forcePull),
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stepContainer.Remove().IfBool(!rc.Config.ReuseContainers),
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stepContainer.Create(rc.Config.ContainerCapAdd, rc.Config.ContainerCapDrop),
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stepContainer.Start(true),
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).Finally(
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stepContainer.Remove().IfBool(!rc.Config.ReuseContainers),
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).Finally(stepContainer.Close())(ctx)
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}
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func evalDockerArgs(ctx context.Context, step step, action *model.Action, cmd *[]string) {
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rc := step.getRunContext()
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stepModel := step.getStepModel()
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inputs := make(map[string]string)
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eval := rc.NewExpressionEvaluator(ctx)
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// Set Defaults
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for k, input := range action.Inputs {
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inputs[k] = eval.Interpolate(ctx, input.Default)
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}
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if stepModel.With != nil {
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for k, v := range stepModel.With {
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inputs[k] = eval.Interpolate(ctx, v)
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}
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}
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mergeIntoMap(step, step.getEnv(), inputs)
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stepEE := rc.NewStepExpressionEvaluator(ctx, step)
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for i, v := range *cmd {
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(*cmd)[i] = stepEE.Interpolate(ctx, v)
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}
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mergeIntoMap(step, step.getEnv(), action.Runs.Env)
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ee := rc.NewStepExpressionEvaluator(ctx, step)
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for k, v := range *step.getEnv() {
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(*step.getEnv())[k] = ee.Interpolate(ctx, v)
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}
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}
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func newStepContainer(ctx context.Context, step step, image string, cmd []string, entrypoint []string) container.Container {
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rc := step.getRunContext()
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stepModel := step.getStepModel()
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rawLogger := common.Logger(ctx).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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envList := make([]string, 0)
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for k, v := range *step.getEnv() {
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envList = append(envList, fmt.Sprintf("%s=%s", k, v))
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}
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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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networkMode := fmt.Sprintf("container:%s", rc.jobContainerName())
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if rc.IsHostEnv(ctx) {
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networkMode = "default"
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}
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stepContainer := container.NewContainer(&container.NewContainerInput{
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Cmd: cmd,
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Entrypoint: entrypoint,
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WorkingDir: rc.JobContainer.ToContainerPath(rc.Config.Workdir),
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Image: image,
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Username: rc.Config.Secrets["DOCKER_USERNAME"],
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Password: rc.Config.Secrets["DOCKER_PASSWORD"],
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Name: createContainerName(rc.jobContainerName(), stepModel.ID),
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Env: envList,
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Mounts: mounts,
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NetworkMode: networkMode,
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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.Config.ContainerOptions,
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})
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return stepContainer
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}
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func populateEnvsFromSavedState(env *map[string]string, step actionStep, rc *RunContext) {
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state, ok := rc.IntraActionState[step.getStepModel().ID]
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if ok {
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for name, value := range state {
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envName := fmt.Sprintf("STATE_%s", name)
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(*env)[envName] = value
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}
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}
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}
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func populateEnvsFromInput(ctx context.Context, env *map[string]string, action *model.Action, rc *RunContext) {
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eval := rc.NewExpressionEvaluator(ctx)
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for inputID, input := range action.Inputs {
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envKey := regexp.MustCompile("[^A-Z0-9-]").ReplaceAllString(strings.ToUpper(inputID), "_")
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envKey = fmt.Sprintf("INPUT_%s", envKey)
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if _, ok := (*env)[envKey]; !ok {
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(*env)[envKey] = eval.Interpolate(ctx, input.Default)
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}
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}
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}
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func getContainerActionPaths(step *model.Step, actionDir string, rc *RunContext) (string, string) {
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actionName := ""
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containerActionDir := "."
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if step.Type() != model.StepTypeUsesActionRemote {
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actionName = getOsSafeRelativePath(actionDir, rc.Config.Workdir)
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containerActionDir = rc.JobContainer.ToContainerPath(rc.Config.Workdir) + "/" + actionName
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actionName = "./" + actionName
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} else if step.Type() == model.StepTypeUsesActionRemote {
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actionName = getOsSafeRelativePath(actionDir, rc.ActionCacheDir())
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containerActionDir = rc.JobContainer.GetActPath() + "/actions/" + actionName
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}
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if actionName == "" {
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actionName = filepath.Base(actionDir)
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if runtime.GOOS == "windows" {
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actionName = strings.ReplaceAll(actionName, "\\", "/")
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}
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}
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return actionName, containerActionDir
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}
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func getOsSafeRelativePath(s, prefix string) string {
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actionName := strings.TrimPrefix(s, prefix)
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if runtime.GOOS == "windows" {
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actionName = strings.ReplaceAll(actionName, "\\", "/")
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}
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actionName = strings.TrimPrefix(actionName, "/")
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return actionName
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}
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func shouldRunPreStep(step actionStep) common.Conditional {
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return func(ctx context.Context) bool {
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log := common.Logger(ctx)
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if step.getActionModel() == nil {
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log.Debugf("skip pre step for '%s': no action model available", step.getStepModel())
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return false
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}
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return true
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}
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}
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func hasPreStep(step actionStep) common.Conditional {
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return func(ctx context.Context) bool {
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action := step.getActionModel()
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return action.Runs.Using == model.ActionRunsUsingComposite ||
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((action.Runs.Using == model.ActionRunsUsingNode12 ||
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action.Runs.Using == model.ActionRunsUsingNode16 ||
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action.Runs.Using == model.ActionRunsUsingNode20) &&
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action.Runs.Pre != "")
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}
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}
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func runPreStep(step actionStep) common.Executor {
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return func(ctx context.Context) error {
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logger := common.Logger(ctx)
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logger.Debugf("run pre step for '%s'", step.getStepModel())
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rc := step.getRunContext()
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stepModel := step.getStepModel()
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action := step.getActionModel()
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switch action.Runs.Using {
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case model.ActionRunsUsingNode12, model.ActionRunsUsingNode16, model.ActionRunsUsingNode20:
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// defaults in pre steps were missing, however provided inputs are available
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populateEnvsFromInput(ctx, step.getEnv(), action, rc)
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// todo: refactor into step
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var actionDir string
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var actionPath string
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if _, ok := step.(*stepActionRemote); ok {
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actionPath = newRemoteAction(stepModel.Uses).Path
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actionDir = fmt.Sprintf("%s/%s", rc.ActionCacheDir(), safeFilename(stepModel.Uses))
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} else {
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actionDir = filepath.Join(rc.Config.Workdir, stepModel.Uses)
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actionPath = ""
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}
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actionLocation := ""
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if actionPath != "" {
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actionLocation = path.Join(actionDir, actionPath)
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} else {
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actionLocation = actionDir
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}
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|
_, containerActionDir := getContainerActionPaths(stepModel, actionLocation, rc)
|
|
|
|
if err := maybeCopyToActionDir(ctx, step, actionDir, actionPath, containerActionDir); err != nil {
|
|
return err
|
|
}
|
|
|
|
containerArgs := []string{"node", path.Join(containerActionDir, action.Runs.Pre)}
|
|
logger.Debugf("executing remote job container: %s", containerArgs)
|
|
|
|
rc.ApplyExtraPath(ctx, step.getEnv())
|
|
|
|
return rc.execJobContainer(containerArgs, *step.getEnv(), "", "")(ctx)
|
|
|
|
case model.ActionRunsUsingComposite:
|
|
if step.getCompositeSteps() == nil {
|
|
step.getCompositeRunContext(ctx)
|
|
}
|
|
|
|
if steps := step.getCompositeSteps(); steps != nil && steps.pre != nil {
|
|
return steps.pre(ctx)
|
|
}
|
|
return fmt.Errorf("missing steps in composite action")
|
|
|
|
default:
|
|
return nil
|
|
}
|
|
}
|
|
}
|
|
|
|
func shouldRunPostStep(step actionStep) common.Conditional {
|
|
return func(ctx context.Context) bool {
|
|
log := common.Logger(ctx)
|
|
stepResults := step.getRunContext().getStepsContext()
|
|
stepResult := stepResults[step.getStepModel().ID]
|
|
|
|
if stepResult == nil {
|
|
log.WithField("stepResult", model.StepStatusSkipped).Debugf("skipping post step for '%s'; step was not executed", step.getStepModel())
|
|
return false
|
|
}
|
|
|
|
if stepResult.Conclusion == model.StepStatusSkipped {
|
|
log.WithField("stepResult", model.StepStatusSkipped).Debugf("skipping post step for '%s'; main step was skipped", step.getStepModel())
|
|
return false
|
|
}
|
|
|
|
if step.getActionModel() == nil {
|
|
log.WithField("stepResult", model.StepStatusSkipped).Debugf("skipping post step for '%s': no action model available", step.getStepModel())
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|
|
}
|
|
|
|
func hasPostStep(step actionStep) common.Conditional {
|
|
return func(ctx context.Context) bool {
|
|
action := step.getActionModel()
|
|
return action.Runs.Using == model.ActionRunsUsingComposite ||
|
|
((action.Runs.Using == model.ActionRunsUsingNode12 ||
|
|
action.Runs.Using == model.ActionRunsUsingNode16 ||
|
|
action.Runs.Using == model.ActionRunsUsingNode20) &&
|
|
action.Runs.Post != "")
|
|
}
|
|
}
|
|
|
|
func runPostStep(step actionStep) common.Executor {
|
|
return func(ctx context.Context) error {
|
|
logger := common.Logger(ctx)
|
|
logger.Debugf("run post step for '%s'", step.getStepModel())
|
|
|
|
rc := step.getRunContext()
|
|
stepModel := step.getStepModel()
|
|
action := step.getActionModel()
|
|
|
|
// todo: refactor into step
|
|
var actionDir string
|
|
var actionPath string
|
|
if _, ok := step.(*stepActionRemote); ok {
|
|
actionPath = newRemoteAction(stepModel.Uses).Path
|
|
actionDir = fmt.Sprintf("%s/%s", rc.ActionCacheDir(), safeFilename(stepModel.Uses))
|
|
} else {
|
|
actionDir = filepath.Join(rc.Config.Workdir, stepModel.Uses)
|
|
actionPath = ""
|
|
}
|
|
|
|
actionLocation := ""
|
|
if actionPath != "" {
|
|
actionLocation = path.Join(actionDir, actionPath)
|
|
} else {
|
|
actionLocation = actionDir
|
|
}
|
|
|
|
_, containerActionDir := getContainerActionPaths(stepModel, actionLocation, rc)
|
|
|
|
switch action.Runs.Using {
|
|
case model.ActionRunsUsingNode12, model.ActionRunsUsingNode16, model.ActionRunsUsingNode20:
|
|
|
|
populateEnvsFromSavedState(step.getEnv(), step, rc)
|
|
|
|
containerArgs := []string{"node", path.Join(containerActionDir, action.Runs.Post)}
|
|
logger.Debugf("executing remote job container: %s", containerArgs)
|
|
|
|
rc.ApplyExtraPath(ctx, step.getEnv())
|
|
|
|
return rc.execJobContainer(containerArgs, *step.getEnv(), "", "")(ctx)
|
|
|
|
case model.ActionRunsUsingComposite:
|
|
if err := maybeCopyToActionDir(ctx, step, actionDir, actionPath, containerActionDir); err != nil {
|
|
return err
|
|
}
|
|
|
|
if steps := step.getCompositeSteps(); steps != nil && steps.post != nil {
|
|
return steps.post(ctx)
|
|
}
|
|
return fmt.Errorf("missing steps in composite action")
|
|
|
|
default:
|
|
return nil
|
|
}
|
|
}
|
|
}
|