[Plugin development]-Programmatically modify 'Execute Shell' content doesn't take effect.

[icetree521]

FreeStyleProject p = (FreeStyleProject) build.getProject();
ORIGIN_BUILDER = (CommandInterpreter) builder;
NEW_BUILDER = new Shell("echo hello");
p.getBuildersList().remove(ORIGIN_BUILDER);
p.getBuildersList().add(NEW_BUILDER);
p.save();
p.doReload();

I am developing a new plugin where it need to modify the content of 'Execute Shell'. Above is my code. The above code 'seems' work fine because I see the content of 'Execute Shell' has been changed as expected. But the problem I met is although the content has been updated, jenkins still execute the old content from the temp 'sh' file(see as below). 

[test] $ sh -xe C:\Users\HZCHEN~1\AppData\Local\Temp\hudson1593723515622610306.sh

Does anyone know why Jenkins still execute the old commands from the temp file? How to tell Jenkins to execute my new 'Execute Shell'?

[Jesse Glick]

On Mon, Jun 13, 2016 at 11:46 AM, icetree521 <icetr...@gmail.com> wrote:
> I am developing a new plugin where it need to modify the content of 'Execute
> Shell'. Above is my code.

Not sure what ultimately you intend to accomplish, but do not do what
you are doing.

[icetree521]

Hi Glick,

What I am doing is to inject some parameters into the content of 'Execute Shell'  dynamically.  After some google search , I found there is no method for me to update the content of "Execute Shell" but can only remove the old one and add back the new one. 

[Jesse Glick]

On Mon, Jun 13, 2016 at 9:43 PM, icetree521 <icetr...@gmail.com> wrote:
> What I am doing is to inject some parameters into the content of 'Execute
> Shell' dynamically. After some google search , I found there is no method
> for me to update the content of "Execute Shell" but can only remove the old
> one and add back the new one.

Maybe set a build variable? For example via `RunListener.setUpEnvironment`?