JCL DS Rename Utility

A small web app for generating IDCAMS JCL to bulk-rename z/OS data sets.

What it does

You enter a list of data set names (one per line) along with a search and replace pattern for a qualifier (e.g. PROD → TEST). The tool:

• replaces exactly matching qualifiers (name parts between the dots) in each data set name,
• validates the new names against z/OS naming rules (max. 44 characters total, max. 8 characters per qualifier, valid characters, no empty qualifiers),
• shows a preview of all changes, including any validation errors,
• generates ready-to-use IDCAMS JCL (ALTER ... NEWNAME(...)), which can be copied or downloaded as a .jcl file.

The generated JCL does not include a job card; you'll need to add one before running it.

Technology

The project is built with Angular (CLI version 22.0.5) using signals and standalone components. The rename and JCL generation logic lives in src/app/jcl.service.ts, the UI in src/app/app.ts / src/app/app.html.

Development

ng serve      # dev server at http://localhost:4200/ (live reload)
ng build      # production build to dist/
ng test       # unit tests with Vitest