A lightweight and portable command-line YAML processor. More information: <https://mikefarah.gitbook.io/yq/>.

• Output a YAML file, in pretty-print format (v4+):
  yq eval path/to/file.yaml
• Output a YAML file, in pretty-print format (v3):
  yq read path/to/file.yaml --colors
• Output the first element in a YAML file that contains only an array (v4+):
  yq eval '.[0]' path/to/file.yaml
• Output the first element in a YAML file that contains only an array (v3):
  yq read path/to/file.yaml '[0]'
• Set (or overwrite) a key to a value in a file (v4+):
  yq eval '.key = "value"' --inplace path/to/file.yaml
• Set (or overwrite) a key to a value in a file (v3):
  yq write --inplace path/to/file.yaml 'key' 'value'
• Merge two files and print to `stdout` (v4+):
  yq eval-all 'select(filename == "path/to/file1.yaml") * select(filename == "path/to/file2.yaml")' path/to/file1.yaml path/to/file2.yaml
• Merge two files and print to `stdout` (v3):
  yq merge path/to/file1.yaml path/to/file2.yaml --colors

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