Example JSON with many properties at various levels elided:
{"partitiontable": {"label": "gpt","partitions": [ {"node": "/dev/nvme0n1p1","start": 2048,"size": 204801 }, {"node": "/dev/nvme0n1p2","start": 208896,"size": 4097 }, {"node": "/dev/nvme0n1p3","start": 243712,"size": 65501185 }, {"node": "/dev/nvme0n1p4","start": 65810432,"size": 3841118208 } ] }}within each element of the 'partitions' array, I'd like to perform the property-creation operation: .end = .start + .size resulting in a document such as:
{"partitiontable": {"label": "gpt","partitions": [ {"end": 206849,"node": "/dev/nvme0n1p1","start": 2048,"size": 204801 }, {"end": 212993,"node": "/dev/nvme0n1p2","start": 208896,"size": 4097 }, {"end": 65744897,"node": "/dev/nvme0n1p3","start": 243712,"size": 65501185 }, {"end": 3906928640,"node": "/dev/nvme0n1p4","start": 65810432,"size": 3841118208 } ] }}There could be many other properties within each object that I'll need to preserve (hopefully without explicit enumeration).
I've attempted straight-out .partitiontable.partitions[].end = .size + .start, but those 'end' properties wind up null, I'm presuming because there's no 'context'.I've also tried using the '..' operator to recurse, but I only get the local-scoping object as output. (jq '.. | objects | select(.start) | .end = .start + .size' results in the array objects but loses the outer document.)