yq eval [expression] [yaml_file1]... [flags]
Aliases: eval, e
Note that you can pass in -
as a filename to read from STDIN.
# runs the expression against each file, in seriesyq e '.a.b | length' f1.yml f2.yml​# '-' will read from STDINcat file.yml | yq e '.a.b' f1.yml - f2.yml​# prints out the fileyq e sample.yamlcat sample.yml | yq e​# prints a new yaml documentyq e -n '.a.b.c = "cat"'​# updates file.yaml directlyyq e '.a.b = "cool"' -i file.yaml
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-h, --help help for eval-C, --colors force print with colors-e, --exit-status set exit status if there are no matches or null or false is returned-I, --indent int sets indent level for output (default 2)-i, --inplace update the yaml file inplace of first yaml file given.-M, --no-colors force print with no colors-N, --no-doc Don't print document separators (---)-n, --null-input Don't read input, simply evaluate the expression given. Useful for creating yaml docs from scratch.-j, --tojson output as json. Set indent to 0 to print json in one line.-v, --verbose verbose mode