I’m using the command line a lot and jq is a helpful tool for dealing with JSON data. You can access JSON object properties and array elements by concatenating the property names with dots and square brackets:
1 | gt; cat ~/.docker/config.json { "auths": { "https://index.docker.io/v1/": { "auth": "aBcDeFghiJKlMn=" }, [...] } } |
1 | gt; cat .docker/config.json | jq . { "auths": { "https://index.docker.io/v1/": { "auth": "aBcDeFghiJKlMn=" }, [...] } } |
1 | gt; cat .docker/config.json | jq .auths { "https://index.docker.io/v1/": { "auth": "aBcDeFghiJKlMn=" }, [...] } |
You can also access and escape “non-trivial” field names in different ways. You can get the encoded Docker auth authentication as follows, by using square brackets and quotes to escape the property name:
1 |
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You’ll notice the formatted and colorized output of jq. Have a look at the documentation.
Published on Java Code Geeks with permission by Sebastian Daschner, partner at our JCG program. See the original article here: Escape JSON property names in jq Opinions expressed by Java Code Geeks contributors are their own. |
