fix: warn Apple M1 (arm64) users (#743)

* fix: warn Apple M1 (arm64) users

* fix: missing dep

* fix: linting

* fix: linting (again)

cmd/root.go

@@ -6,10 +6,9 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
+	"runtime"
 	"strings"
 
-	"github.com/nektos/act/pkg/common"
-
 	"github.com/AlecAivazis/survey/v2"
 	"github.com/andreaskoch/go-fswatch"
 	"github.com/joho/godotenv"
@@ -18,6 +17,7 @@ import (
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 
+	"github.com/nektos/act/pkg/common"
 	"github.com/nektos/act/pkg/model"
 	"github.com/nektos/act/pkg/runner"
 )
@@ -152,6 +152,15 @@ func readEnvs(path string, envs map[string]string) bool {
 //nolint:gocyclo
 func newRunCommand(ctx context.Context, input *Input) func(*cobra.Command, []string) error {
 	return func(cmd *cobra.Command, args []string) error {
+		if runtime.GOOS == "darwin" && runtime.GOARCH == "arm64" && input.containerArchitecture == "" {
+			l := log.New()
+			l.SetFormatter(&log.TextFormatter{
+				DisableQuote:     true,
+				DisableTimestamp: true,
+			})
+			l.Warnf(" \U000026A0 You are using Apple M1 chip and you have not specified container architecture, you might encounter issues while running act. If so, try running it with '--container-architecture linux/amd64'. \U000026A0 \n")
+		}
+
 		log.Debugf("Loading environment from %s", input.Envfile())
 		envs := make(map[string]string)
 		if input.envs != nil {

pkg/runner/command_test.go

@@ -4,9 +4,10 @@ import (
 	"context"
 	"testing"
 
-	"github.com/nektos/act/pkg/common"
 	"github.com/sirupsen/logrus/hooks/test"
 	"github.com/stretchr/testify/assert"
+
+	"github.com/nektos/act/pkg/common"
 )
 
 func TestSetEnv(t *testing.T) {