Fix "New Item" sidebar URL when browsing a folder view

[dakanggo]

Problem

With the Folders plugin, the sidebar "New Item" link is rendered from Folder/tasks-create.jelly using getNearestAncestorUrl(request, folder), which resolves to the folder URL only (e.g. job/myfolder/). When the user is on a non-default view inside that folder (e.g. job/myfolder/view/my_view/), the link incorrectly points to .../newJob under the folder root instead of .../view/my_view/newJob.

Solution

Compute the link prefix from the current View when the Jelly context exposes the view variable (as set by Jenkins core’s View/index.jelly before the side panel is rendered), and fall back to the folder URL when that is not available.

Testing

• Manual: create a folder, add a non-primary list view, open that view, click "New Item" in the sidebar and confirm the URL includes view/<name>/.
• Regression: open the folder’s primary/default view and confirm "New Item" still works.

Proposed changelog entries

• Fix sidebar "New Item" URL when a folder view other than the primary view is selected.

[jtnord]

When the user is on a non-default view inside that folder (e.g. job/myfolder/view/my_view/), the link incorrectly points to .../newJob under the folder root instead of .../view/my_view/newJob.

Why is this an issue, what problems does it cause?

[jtnord]

core just always uses the view URL :-/

https://github.com/jenkinsci/jenkins/blob/2fcea874daf9ee20cf080fc3e386e477b3297f9c/core/src/main/resources/hudson/model/View/new-view-page.jelly#L72-L77

[dakanggo]

When the user is on a non-default view inside that folder (e.g. job/myfolder/view/my_view/), the link incorrectly points to .../newJob under the folder root instead of .../view/my_view/newJob.

Why is this an issue, what problems does it cause?

When I create a folder on the home page, navigate into that folder, and then create a view inside it, selecting that view to create a job does not place the job under the current view. Instead, the job is created directly under the folder.

Example:

• home page → Create new item select Folder and named myFolder
• home page/myFolder → Create new view named myView
• home page/myFolder/myView → Attempt to create new item named myJob

Expected behavior: myJob should reside under home page/myFolder/myView.
Actual behavior: myJob is incorrectly placed under home page/myFolder instead.