Abstract: A repository definition computer program may (1) retrieve repository data from data repositories; (2) identify a data repository structure for each data repository; (3) generating data repository definitions for the data repositories; (4) provide the data repository definitions in a data serialization language to a repository management system; and (5) generate a hash of each file in the data repositories and save a copy of each file named its hash. A UAT management system computer program may (6) execute a repository extract process to repave one the data repositories with the hash-named files. The repository extract computer program may (7) retrieve the data repository definitions for the data repository being repaved from a repository management system server; (8) retrieve the hash-named files from object storage for the data repository being repaved; and (9) recreate the data repository from the data repository definitions using hard links to the hash-named files.