zarf tools yq eval

zarf tools yq eval

(default) Apply the expression to each document in each yaml file in sequence

Synopsis

yq is a portable command-line data file processor (https://github.com/mikefarah/yq/) See https://mikefarah.gitbook.io/yq/ for detailed documentation and examples.

Evaluate Sequence

This command iterates over each yaml document from each given file, applies the expression and prints the result in sequence.

zarf tools yq eval [expression] [yaml_file1]... [flags]

Examples

# Reads field under the given path for each file
zarf tools yq e '.a.b' f1.yml f2.yml

# Prints out the file
zarf tools yq e sample.yaml

# Pipe from STDIN
## use '-' as a filename to pipe from STDIN
cat file2.yml | zarf tools yq e '.a.b' file1.yml - file3.yml

# Creates a new yaml document
## Note that editing an empty file does not work.
zarf tools yq e -n '.a.b.c = "cat"'

# Update a file in place
zarf tools yq e '.a.b = "cool"' -i file.yaml

Options

  -h, --help   help for eval

Options inherited from parent commands

  -C, --colors                        force print with colors
      --csv-auto-parse                parse CSV YAML/JSON values (default true)
      --csv-separator char            CSV Separator character (default ,)
  -e, --exit-status                   set exit status if there are no matches or null or false is returned
      --expression string             forcibly set the expression argument. Useful when yq argument detection thinks your expression is a file.
      --from-file string              Load expression from specified file.
  -f, --front-matter string           (extract|process) first input as yaml front-matter. Extract will pull out the yaml content, process will run the expression against the yaml content, leaving the remaining data intact
      --header-preprocess             Slurp any header comments and separators before processing expression. (default true)
  -I, --indent int                    sets indent level for output (default 2)
  -i, --inplace                       update the file in place of first file given.
  -p, --input-format string           [auto|a|yaml|y|json|j|props|p|csv|c|tsv|t|xml|x|base64|uri|toml|lua|l] parse format for input. (default "auto")
      --lua-globals                   output keys as top-level global variables
      --lua-prefix string             prefix (default "return ")
      --lua-suffix string             suffix (default ";\n")
      --lua-unquoted                  output unquoted string keys (e.g. {foo="bar"})
  -M, --no-colors                     force print with no colors
  -N, --no-doc                        Don't print document separators (---)
  -0, --nul-output                    Use NUL char to separate values. If unwrap scalar is also set, fail if unwrapped scalar contains NUL char.
  -n, --null-input                    Don't read input, simply evaluate the expression given. Useful for creating docs from scratch.
  -o, --output-format string          [auto|a|yaml|y|json|j|props|p|csv|c|tsv|t|xml|x|base64|uri|toml|shell|s|lua|l] output format type. (default "auto")
  -P, --prettyPrint                   pretty print, shorthand for '... style = ""'
      --properties-array-brackets     use [x] in array paths (e.g. for SpringBoot)
      --properties-separator string   separator to use between keys and values (default " = ")
  -s, --split-exp string              print each result (or doc) into a file named (exp). [exp] argument must return a string. You can use $index in the expression as the result counter.
      --split-exp-file string         Use a file to specify the split-exp expression.
      --string-interpolation          Toggles strings interpolation of \(exp) (default true)
      --tsv-auto-parse                parse TSV YAML/JSON values (default true)
  -r, --unwrapScalar                  unwrap scalar, print the value with no quotes, colors or comments. Defaults to true for yaml (default true)
  -v, --verbose                       verbose mode
      --xml-attribute-prefix string   prefix for xml attributes (default "+@")
      --xml-content-name string       name for xml content (if no attribute name is present). (default "+content")
      --xml-directive-name string     name for xml directives (e.g. <!DOCTYPE thing cat>) (default "+directive")
      --xml-keep-namespace            enables keeping namespace after parsing attributes (default true)
      --xml-proc-inst-prefix string   prefix for xml processing instructions (e.g. <?xml version="1"?>) (default "+p_")
      --xml-raw-token                 enables using RawToken method instead Token. Commonly disables namespace translations. See https://pkg.go.dev/encoding/xml#Decoder.RawToken for details. (default true)
      --xml-skip-directives           skip over directives (e.g. <!DOCTYPE thing cat>)
      --xml-skip-proc-inst            skip over process instructions (e.g. <?xml version="1"?>)
      --xml-strict-mode               enables strict parsing of XML. See https://pkg.go.dev/encoding/xml for more details.

SEE ALSO

• zarf tools yq - yq is a lightweight and portable command-line data file processor.