Is there a simple way to extract a sub tree from JSON, keeping the path?

I am using

cat composer.json | jq .repositories > /tmp/composer.json

But this would miss the repositories node it self.

How can I filter a composer.json to include only certain sub trees?

CodePudding user response：

Given an object, .repositories fetches the content of a field called repositories. To wrap that content inside another object under a field named again repositories, create that object with such field and add the content using {repositories: .repositories}. As this pattern is so common, there is a shorthand for it: {repositories}.

jq '{repositories}' composer.json

To "extract" more than just one field in the same object, separate the field names with commas: {x,y,z}. To "extract" more than one field, each in its own object, separate the objects with commas: {x},{y},{z}.