A system and method for providing a code release infrastructure with granular code patching is described. Code patches, each including at least one resource unit are provided. Each resource unit includes metadata and file components. Code libraries, each including at least one resource unit, are patched. The metadata for each resource unit in the code patches is compared to the metadata for each such corresponding resource unit in the code libraries. Each resource unit in the code patches is merged into the code libraries for each such corresponding resource unit that is out-of-date as defined by merge rules. Archive files, as defined by archive file definitions, are created or updated using the resource units from the code libraries, or, optionally, are deleted. The archive files are digitally signed also as required. The system and method enables source and derived code and third party code to be patched granularly.