fix(core): ability to specify a commands separator on scripting

part of https://github.com/kestra-io/plugin-scripts/issues/301

core/src/main/java/io/kestra/core/models/tasks/runners/ScriptService.java

@@ -147,18 +147,14 @@ public final class ScriptService {
 
 
     public static List<String> scriptCommands(List<String> interpreter, List<String> beforeCommands, String command) {
-        return scriptCommands(interpreter, beforeCommands, List.of(command), TargetOS.LINUX);
+        return scriptCommands(interpreter, beforeCommands, List.of(command), TargetOS.LINUX.lineSeparator);
     }
 
     public static List<String> scriptCommands(List<String> interpreter, List<String> beforeCommands, List<String> commands) {
-        return scriptCommands(interpreter, beforeCommands, commands, TargetOS.LINUX);
+        return scriptCommands(interpreter, beforeCommands, commands, TargetOS.LINUX.lineSeparator);
     }
 
-    public static List<String> scriptCommands(List<String> interpreter, List<String> beforeCommands, String command, TargetOS targetOS) {
-        return scriptCommands(interpreter, beforeCommands, List.of(command), targetOS);
-    }
-
-    public static List<String> scriptCommands(List<String> interpreter, List<String> beforeCommands, List<String> commands, TargetOS targetOS) {
+    public static List<String> scriptCommands(List<String> interpreter, List<String> beforeCommands, List<String> commands, String commandSeparator) {
         ArrayList<String> commandsArgs = new ArrayList<>(interpreter);
         commandsArgs.add(
             Stream
@@ -166,7 +162,7 @@ public final class ScriptService {
                     ListUtils.emptyOnNull(beforeCommands).stream(),
                     commands.stream()
                 )
-                .collect(Collectors.joining(targetOS.lineSeparator))
+                .collect(Collectors.joining(commandSeparator))
         );
 
         return commandsArgs;

script/src/main/java/io/kestra/plugin/scripts/exec/AbstractExecScript.java

@@ -115,6 +115,12 @@ public abstract class AbstractExecScript extends Task implements NamespaceFilesI
     @Deprecated
     protected DockerOptions docker;
 
+    @Schema(
+        title = "The separator to use between commands.",
+        description = "Defaults to OS line separator"
+    )
+    protected Property<String> commandsSeparator;
+
     @Schema(
         title = "The task runner container image, only used if the task runner is container-based."
     )
@@ -165,6 +171,7 @@ public abstract class AbstractExecScript extends Task implements NamespaceFilesI
             .withEnableOutputDirectory(runContext.render(this.getOutputDirectory()).as(Boolean.class).orElse(null))
             .withTimeout(runContext.render(this.getTimeout()).as(Duration.class).orElse(null))
             .withTargetOS(runContext.render(this.getTargetOS()).as(TargetOS.class).orElseThrow())
+            .withCommandsSeparator(runContext.render(this.getCommandsSeparator()).as(String.class).orElseThrow())
             .withFailFast(runContext.render(this.getFailFast()).as(Boolean.class).orElse(false));
     }
 

script/src/main/java/io/kestra/plugin/scripts/exec/scripts/runners/CommandsWrapper.java

@@ -94,6 +94,9 @@ public class CommandsWrapper implements TaskCommands {
     @With
     private TargetOS targetOS;
 
+    @With
+    private String commandsSeparator;
+
     public CommandsWrapper(RunContext runContext) {
         this.runContext = runContext;
         this.workingDirectory = runContext.workingDir().path();
@@ -125,7 +128,8 @@ public class CommandsWrapper implements TaskCommands {
             outputFiles,
             enableOutputDirectory,
             timeout,
-            targetOS
+            targetOS,
+            commandsSeparator
         );
     }
 
@@ -172,7 +176,7 @@ public class CommandsWrapper implements TaskCommands {
                 renderedInterpreter,
                 this.isBeforeCommandsWithOptions() ? getBeforeCommandsWithOptions(renderedBeforeCommands) :  renderedBeforeCommands,
                 renderedCommands,
-                Optional.ofNullable(targetOS).orElse(TargetOS.AUTO)
+                Optional.ofNullable(commandsSeparator).orElse(Optional.ofNullable(targetOS).orElse(TargetOS.AUTO).lineSeparator)
             );
 
         this.commands = Property.ofValue(finalCommands);
@@ -310,4 +314,4 @@ public class CommandsWrapper implements TaskCommands {
         // errexit option may be unsupported by non-shell interpreter.
         return List.of("set -e");
     }
-}
+}