aeson-diff: Extract and apply patches to JSON documents.

[ algorithms, bsd3, json, library, program, web ] [ Propose Tags ]

This is a small library for working with changes to JSON documents. It includes a library and two command-line executables in the style of the diff(1) and patch(1) commands available on many systems.


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Versions 0.1.1.1, 0.1.1.2, 0.1.1.3, 1.0.0.0, 1.0.0.1, 1.1.0.0, 1.1.0.2, 1.1.0.3, 1.1.0.4, 1.1.0.5
Change log CHANGELOG.md
Dependencies aeson, aeson-diff, base (>=4.9 && <4.13), bytestring (>=0.10), edit-distance-vector, hashable, mtl, optparse-applicative, scientific, text, unordered-containers, vector [details]
License BSD-3-Clause
Copyright (c) 2015 Thomas Sutton and others.
Author Thomas Sutton
Maintainer me@thomas-sutton.id.au
Revised Revision 1 made by GeorgeWilson at Thu Nov 22 02:29:49 UTC 2018
Category JSON, Web, Algorithms
Home page https://github.com/thsutton/aeson-diff
Source repo head: git clone https://github.com/thsutton/aeson-diff
Uploaded by ThomasSutton at Tue May 15 08:44:35 UTC 2018
Distributions LTSHaskell:1.1.0.5, NixOS:1.1.0.5, Stackage:1.1.0.5
Executables json-patch, json-diff
Downloads 2654 total (87 in the last 30 days)
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Status Docs available [build log]
Last success reported on 2018-05-15 [all 1 reports]
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Readme for aeson-diff-1.1.0.5

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Aeson Diff

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This is a small library for working with changes to JSON documents. It includes a library and two executables in the style of diff(1) and patch(1). Patches are themselves JSON Patch documents as specified in RFC 6902.

Installing

The aeson-diff package is written in Haskell and can be installed using the Cabal package management tool, stack, or something similar.

stack install aeson-diff

The command-line tools can then be executed using stack:

stack exec json-diff -- ....
stack exec json-patch -- ....

If you prefer to use Cabal, something like this might do the trick:

cd aeson-diff/
cabal sandbox init
cabal install --dependencies-only
cabal build
sudo mkdir -p /usr/local/bin
sudo cp dist/build/json-*/json-{diff,patch} /usr/local/bin/

Usage

Patch format

aeson-diff supports the JSON Patch format described in RFC 6902.

json-diff command

The json-diff command compares two JSON documents and extracts a patch describing the differences between the first document and the second.

Usage: json-diff [-T|--test-before-remove] [-o|--output OUTPUT] FROM TO
Generate a patch between two JSON documents.

Available options:
    -h,--help                Show this help text
    -T,--test-before-remove  Include a test before each remove.
    -o,--output OUTPUT       Write patch to file OUTPUT.

json-patch command

The json-patch command applies a patch describing changes to be made to a JSON document.

Usage: json-patch [-o|--output OUTPUT] PATCH FROM
Generate a patch between two JSON documents.

Available options:
  -h,--help                Show this help text
  -o,--output OUTPUT       Destination for patched JSON.
  PATCH                    Patch to apply.
  FROM                     JSON file to patch.

aeson-diff library

The aeson-diff library exports as single module: Data.Aeson.Diff. This exports diff and patch functions which do exactly what might be expected:

  • diff :: Value -> Value -> Patch examines source and target JSON Values and constructs a new Patch describing the changes.

  • patch :: Patch -> Value -> Result Value applies the changes in a Patch to a JSON Value. If an error results then an exception is thrown.

For more complete information, see the documentation.