Implement the "like" data set capability available from zOSMF API

[zdmullen]

Is your feature request related to a problem? Please describe.

I would like to be able to do "allocate like" inside of Zowe Explorer. This should be available now that zOSMF has a REST parameter for allocate like.

This should be implemented in Zowe CLI so that Zowe Explorer can implement it.
Please refer to zowe/zowe-cli#754 for SDK implementation details.

Describe the solution you'd like

Create a new data set and in the drop down of choices, be able to select "allocate like" at the bottom of the list.

Or

Right + click on a particular data set and select "Allocate like".

Further refinement with regard to the UX will be needed, of course.

Additional context

IBM documentation about the new REST parameter:

https://www.ibm.com/support/knowledgecenter/SSLTBW_2.4.0/com.ibm.zos.v2r4.izua700/IZUHPINFO_API_CreateDataSet.htm

[jelaplan]

An idea here is to implement copying of data sets. And then have two paste options. One to paste the a copy of the dataset and one to allocate like.

I'm wondering how fixed we are on the term allocate like. I guess that is a mainstay of ISPF MF users but it is not self-revealing meaning wise. Pasting the file properties might be closer.

[katelynienaber]

Working on getting this implemented in CLI here.

[jelaplan]

I have some concerns with the menu label Allocate Like. It is likely familiar to experienced mainframers. But for the modern developer experience, that name is obscure and hard to interpret.

I looked at some IBM doc around Eclipse and Z Open Development and read the following snippet "click Copy characteristics from an existing data set." That phrase is more descriptive of the feature. I wonder if we might append the menu label. Some ideas:

• Allocate Like (Copy File Type)
• Allocate Like (Copy File Format)
• Allocate Like (New File with Same File Format)
• Allocate Like (Copy DS Characteristics)
• Allocate Like (Copy File Details)
• Allocate Like (Copy File Attributes)
• Allocate Like (New File with Same Attributes)
• Allocate Like (New Dataset)
• Create New Dataset Modelled on This
• New Dataset with the Same Format
• Create New Dataset Like This One

[katelynienaber]

@jelaplan I changed the name of Allocate Like in the PR to Allocate Like (Copy File Attributes), as I think it reflects what the function is doing most accurately.