act/pkg/runner/step_action_remote.go
Shubh Bapna 4721abfa6d
fix: remove hardcoded reference to github.com when using reusable remote workflows and remote actions (#1784)
* fix filename for remote reusable workflow and remove hardcoded reference to github.com

* remove hardcoded reference to github.com for remote action
2023-05-03 15:46:28 +00:00

258 lines
8.2 KiB
Go

package runner
import (
"context"
"errors"
"fmt"
"io"
"os"
"path"
"path/filepath"
"regexp"
"strings"
gogit "github.com/go-git/go-git/v5"
"github.com/nektos/act/pkg/common"
"github.com/nektos/act/pkg/common/git"
"github.com/nektos/act/pkg/model"
)
type stepActionRemote struct {
Step *model.Step
RunContext *RunContext
compositeRunContext *RunContext
compositeSteps *compositeSteps
readAction readAction
runAction runAction
action *model.Action
env map[string]string
remoteAction *remoteAction
}
var (
stepActionRemoteNewCloneExecutor = git.NewGitCloneExecutor
)
func (sar *stepActionRemote) prepareActionExecutor() common.Executor {
return func(ctx context.Context) error {
if sar.remoteAction != nil && sar.action != nil {
// we are already good to run
return nil
}
sar.remoteAction = newRemoteAction(sar.Step.Uses)
if sar.remoteAction == nil {
return fmt.Errorf("Expected format {org}/{repo}[/path]@ref. Actual '%s' Input string was not in a correct format", sar.Step.Uses)
}
github := sar.getGithubContext(ctx)
sar.remoteAction.URL = github.ServerURL
if sar.remoteAction.IsCheckout() && isLocalCheckout(github, sar.Step) && !sar.RunContext.Config.NoSkipCheckout {
common.Logger(ctx).Debugf("Skipping local actions/checkout because workdir was already copied")
return nil
}
for _, action := range sar.RunContext.Config.ReplaceGheActionWithGithubCom {
if strings.EqualFold(fmt.Sprintf("%s/%s", sar.remoteAction.Org, sar.remoteAction.Repo), action) {
sar.remoteAction.URL = "https://github.com"
github.Token = sar.RunContext.Config.ReplaceGheActionTokenWithGithubCom
}
}
actionDir := fmt.Sprintf("%s/%s", sar.RunContext.ActionCacheDir(), safeFilename(sar.Step.Uses))
gitClone := stepActionRemoteNewCloneExecutor(git.NewGitCloneExecutorInput{
URL: sar.remoteAction.CloneURL(),
Ref: sar.remoteAction.Ref,
Dir: actionDir,
Token: github.Token,
})
var ntErr common.Executor
if err := gitClone(ctx); err != nil {
if errors.Is(err, git.ErrShortRef) {
return fmt.Errorf("Unable to resolve action `%s`, the provided ref `%s` is the shortened version of a commit SHA, which is not supported. Please use the full commit SHA `%s` instead",
sar.Step.Uses, sar.remoteAction.Ref, err.(*git.Error).Commit())
} else if errors.Is(err, gogit.ErrForceNeeded) { // TODO: figure out if it will be easy to shadow/alias go-git err's
ntErr = common.NewInfoExecutor("Non-terminating error while running 'git clone': %v", err)
} else {
return err
}
}
remoteReader := func(ctx context.Context) actionYamlReader {
return func(filename string) (io.Reader, io.Closer, error) {
f, err := os.Open(filepath.Join(actionDir, sar.remoteAction.Path, filename))
return f, f, err
}
}
return common.NewPipelineExecutor(
ntErr,
func(ctx context.Context) error {
actionModel, err := sar.readAction(ctx, sar.Step, actionDir, sar.remoteAction.Path, remoteReader(ctx), os.WriteFile)
sar.action = actionModel
return err
},
)(ctx)
}
}
func (sar *stepActionRemote) pre() common.Executor {
sar.env = map[string]string{}
return common.NewPipelineExecutor(
sar.prepareActionExecutor(),
runStepExecutor(sar, stepStagePre, runPreStep(sar)).If(hasPreStep(sar)).If(shouldRunPreStep(sar)))
}
func (sar *stepActionRemote) main() common.Executor {
return common.NewPipelineExecutor(
sar.prepareActionExecutor(),
runStepExecutor(sar, stepStageMain, func(ctx context.Context) error {
github := sar.getGithubContext(ctx)
if sar.remoteAction.IsCheckout() && isLocalCheckout(github, sar.Step) && !sar.RunContext.Config.NoSkipCheckout {
if sar.RunContext.Config.BindWorkdir {
common.Logger(ctx).Debugf("Skipping local actions/checkout because you bound your workspace")
return nil
}
eval := sar.RunContext.NewExpressionEvaluator(ctx)
copyToPath := path.Join(sar.RunContext.JobContainer.ToContainerPath(sar.RunContext.Config.Workdir), eval.Interpolate(ctx, sar.Step.With["path"]))
return sar.RunContext.JobContainer.CopyDir(copyToPath, sar.RunContext.Config.Workdir+string(filepath.Separator)+".", sar.RunContext.Config.UseGitIgnore)(ctx)
}
actionDir := fmt.Sprintf("%s/%s", sar.RunContext.ActionCacheDir(), safeFilename(sar.Step.Uses))
return sar.runAction(sar, actionDir, sar.remoteAction)(ctx)
}),
)
}
func (sar *stepActionRemote) post() common.Executor {
return runStepExecutor(sar, stepStagePost, runPostStep(sar)).If(hasPostStep(sar)).If(shouldRunPostStep(sar))
}
func (sar *stepActionRemote) getRunContext() *RunContext {
return sar.RunContext
}
func (sar *stepActionRemote) getGithubContext(ctx context.Context) *model.GithubContext {
ghc := sar.getRunContext().getGithubContext(ctx)
// extend github context if we already have an initialized remoteAction
remoteAction := sar.remoteAction
if remoteAction != nil {
ghc.ActionRepository = fmt.Sprintf("%s/%s", remoteAction.Org, remoteAction.Repo)
ghc.ActionRef = remoteAction.Ref
}
return ghc
}
func (sar *stepActionRemote) getStepModel() *model.Step {
return sar.Step
}
func (sar *stepActionRemote) getEnv() *map[string]string {
return &sar.env
}
func (sar *stepActionRemote) getIfExpression(ctx context.Context, stage stepStage) string {
switch stage {
case stepStagePre:
github := sar.getGithubContext(ctx)
if sar.remoteAction.IsCheckout() && isLocalCheckout(github, sar.Step) && !sar.RunContext.Config.NoSkipCheckout {
// skip local checkout pre step
return "false"
}
return sar.action.Runs.PreIf
case stepStageMain:
return sar.Step.If.Value
case stepStagePost:
return sar.action.Runs.PostIf
}
return ""
}
func (sar *stepActionRemote) getActionModel() *model.Action {
return sar.action
}
func (sar *stepActionRemote) getCompositeRunContext(ctx context.Context) *RunContext {
if sar.compositeRunContext == nil {
actionDir := fmt.Sprintf("%s/%s", sar.RunContext.ActionCacheDir(), safeFilename(sar.Step.Uses))
actionLocation := path.Join(actionDir, sar.remoteAction.Path)
_, containerActionDir := getContainerActionPaths(sar.getStepModel(), actionLocation, sar.RunContext)
sar.compositeRunContext = newCompositeRunContext(ctx, sar.RunContext, sar, containerActionDir)
sar.compositeSteps = sar.compositeRunContext.compositeExecutor(sar.action)
} else {
// Re-evaluate environment here. For remote actions the environment
// need to be re-created for every stage (pre, main, post) as there
// might be required context changes (inputs/outputs) while the action
// stages are executed. (e.g. the output of another action is the
// input for this action during the main stage, but the env
// was already created during the pre stage)
env := evaluateCompositeInputAndEnv(ctx, sar.RunContext, sar)
sar.compositeRunContext.Env = env
sar.compositeRunContext.ExtraPath = sar.RunContext.ExtraPath
}
return sar.compositeRunContext
}
func (sar *stepActionRemote) getCompositeSteps() *compositeSteps {
return sar.compositeSteps
}
type remoteAction struct {
URL string
Org string
Repo string
Path string
Ref string
}
func (ra *remoteAction) CloneURL() string {
return fmt.Sprintf("%s/%s/%s", ra.URL, ra.Org, ra.Repo)
}
func (ra *remoteAction) IsCheckout() bool {
if ra.Org == "actions" && ra.Repo == "checkout" {
return true
}
return false
}
func newRemoteAction(action string) *remoteAction {
// GitHub's document[^] describes:
// > We strongly recommend that you include the version of
// > the action you are using by specifying a Git ref, SHA, or Docker tag number.
// Actually, the workflow stops if there is the uses directive that hasn't @ref.
// [^]: https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions
r := regexp.MustCompile(`^([^/@]+)/([^/@]+)(/([^@]*))?(@(.*))?$`)
matches := r.FindStringSubmatch(action)
if len(matches) < 7 || matches[6] == "" {
return nil
}
return &remoteAction{
Org: matches[1],
Repo: matches[2],
Path: matches[4],
Ref: matches[6],
URL: "https://github.com",
}
}
func safeFilename(s string) string {
return strings.NewReplacer(
`<`, "-",
`>`, "-",
`:`, "-",
`"`, "-",
`/`, "-",
`\`, "-",
`|`, "-",
`?`, "-",
`*`, "-",
).Replace(s)
}