added the shell script suffix per os

shell/powershell/powershell.go

@@ -12,6 +12,9 @@ import (
 	"strings"
 )
 
+// Suffix provides the shell script suffix.
+const Suffix = ".ps1"
+
 // Command returns the Powershell command and arguments.
 func Command() (string, []string) {
 	return "powershell", []string{

shell/shell.go

@@ -14,6 +14,9 @@ import (
 	"strings"
 )
 
+// Suffix provides the shell script suffix.
+const Suffix = ".sh"
+
 // Command returns the shell command and arguments.
 func Command() (string, []string) {
 	return "/bin/sh", []string{"-e"}

shell/shell_windows.go

@@ -8,6 +8,9 @@ package shell
 
 import "github.com/drone/runner-go/shell/powershell"
 
+// Suffix provides the shell script suffix.
+const Suffix = ".ps1"
+
 // Command returns the powershell command and arguments.
 func Command() (string, []string) {
 	return powershell.Command()