support shebang in shell script

Signed-off-by: Patrick Zhao <zhaoyu@koderover.com>

Author: PetrusZ

pkg/microservice/aslan/core/workflow/service/workflow/controller/job/job_build.go

@@ -548,10 +548,16 @@ func (j BuildJobController) ToTask(taskID int64) ([]*commonmodels.JobTask, error
 		// init shell step
 		scripts := []string{}
 		dockerLoginCmd := `docker login -u "$DOCKER_REGISTRY_AK" -p "$DOCKER_REGISTRY_SK" "$DOCKER_REGISTRY_HOST" &> /dev/null`
+
+		if !strings.HasPrefix(buildInfo.Scripts, "#!") {
+			buildInfo.Scripts = "#!/bin/bash\n" + buildInfo.Scripts
+		}
+
 		if jobTask.Infrastructure == setting.JobVMInfrastructure {
 			scripts = append(scripts, strings.Split(replaceWrapLine(buildInfo.Scripts), "\n")...)
 		} else {
-			scripts = append([]string{dockerLoginCmd}, strings.Split(replaceWrapLine(buildInfo.Scripts), "\n")...)
+			scripts := strings.Split(replaceWrapLine(buildInfo.Scripts), "\n")
+			scripts = append(scripts[:1], append([]string{dockerLoginCmd}, scripts[1:]...)...)
 			scripts = append(scripts, outputScript(outputs, jobTask.Infrastructure)...)
 		}
 		scriptStep := &commonmodels.StepTask{

pkg/microservice/jobexecutor/core/service/step/step_shell.go

@@ -23,6 +23,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"sync"
 	"time"
@@ -80,14 +81,20 @@ func (s *ShellStep) Run(ctx context.Context) error {
 	if !s.spec.SkipPrepare {
 		scripts = prepareScriptsEnv()
 	}
-	scripts = append(scripts, s.spec.Scripts...)
+	scripts = append(s.spec.Scripts[:1], append(scripts, s.spec.Scripts[1:]...)...)
 
 	userScriptFile := "user_script.sh"
 	if err := ioutil.WriteFile(filepath.Join(os.TempDir(), userScriptFile), []byte(strings.Join(scripts, "\n")), 0700); err != nil {
 		return fmt.Errorf("write script file error: %v", err)
 	}
 
-	cmd := exec.Command("/bin/bash", filepath.Join(os.TempDir(), userScriptFile))
+	var cmd *exec.Cmd
+	if runtime.GOOS == "windows" {
+		cmd = exec.Command("/bin/bash", filepath.Join(os.TempDir(), userScriptFile))
+	} else {
+		cmd = exec.Command(filepath.Join(os.TempDir(), userScriptFile))
+	}
+
 	cmd.Dir = s.workspace
 	cmd.Env = s.envs