I agree with Jon here – “Updating source by line number is not a merge.”
I hoped for a long time that the VM CNTRL/AUX/UPDATE process could be upgraded to use some equivalent of “diff -u” + ”patch” context-based update file creation and merging used in *ix-based source maintenance systems, but to my knowledge that hasn’t happened yet. Then again, we now have a supported “git” on z/OS, so who am I to complain? Peter From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Jon Perryman Sent: Tuesday, September 9, 2025 8:11 PM To: [email protected] Subject: Re: Product build using CMS vs TSO Was: Pipelines = you don't understand z/OS On Tue, 9 Sep 2025 18:38:53 -0400, Phil Smith III <mailto:[email protected]> wrote: >Dunno about the z/OS equivalents, but in CMS, the CNTRL/AUX/UPDATE has been >in heavy use for almost 60 years, and "unreliable" isn't a word I'd come close >to using. Sorry, I meant UPDATE instead of VMFUPDAT. Old habits die hard. Can you explain "merge process" which has to be something other than VMFUPDAT / UPDATE. Updating source by line number is not a merge. >>> With XEDIT it's easy to have multiple people testing changes to the >>> same member with a merge process that's normally very quick. What is this "merge process" in z/VM that guarantees program logic or is he talking non-sense? z/OS SUPERC can produce UPDCMS8 (VMFUPDAT compatible) and UPDMVS8 (IEBUPDTE compatible) files but they have now method to validate program logic and the developer must review the program logic has not been affected by interceding changes. -- This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
