jq

jq command for MoonX.

command-line

moonx

wasm

Download zip

Author

cli

Version

0.2.2

License

Apache-2.0

Repository

github.com/moonbit-community/cmd

Last updated

8 hours ago

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#jq for moonx

Malformed --argjson input returns status 2 and the jq 1.8.2 argument-error diagnostic, including its help/manual guidance; no filter output is emitted.

Version 0.2.2 behavior is documented here. The support record separates local verification from published MoonX behavior; moonx examples use registry releases.

Run jq-compatible JSON filters without installing a separate binary:

printf '%s' '{"name":"Moon"}' | moonx cli/jq -r '.name'
moonx cli/jq -n -c '{ok: true, values: [1, 2]}'
moonx cli/jq -c '.items[]' data.json

moonx uses the linear-memory WebAssembly build by default. Arguments after cli/jq are passed directly to the jq-compatible command.

Supported options:

-c, --compact-output: print compact JSON.
-r, --raw-output: print strings without JSON quotes.
-f, --from-file FILE: read the filter from FILE.
-n, --null-input: evaluate once with null input.
-l, --logs: process newline-delimited JSON and skip invalid lines.
-S, --sort-keys: recursively sort object keys for deterministic output.
-j, --join-output: print strings without quotes and omit separators between filter results.
-s, --slurp: evaluate one array containing all input values.
-R, --raw-input: treat each input line as a JSON string.
-e, --exit-status: return 1 for false/null and 4 when no result is produced.
--arg NAME VALUE, --argjson NAME JSON: bind values lexically for $NAME, including string interpolation and local variable shadowing.
--indent N and --tab: select pretty-print indentation. N ranges from -1 (tabs) through 7; 0 preserves line breaks without indentation. The last of -c, --indent and --tab selects formatting.
-C, --color-output: emit jq 1.8.2 ANSI colors, including on redirected output.
-M, --monochrome-output: disable colors; this wins over -C in either order.

JQ_COLORS supplies colon-separated SGR codes for null, false, true, numbers, strings, arrays, objects and object keys. Omitted palette entries retain their defaults; invalid values warn on stderr and use the default palette, without changing the query's exit status. Raw string results (-r/-j) remain uncolored. Without -C, output is monochrome: automatic TTY detection awaits a public isatty API. Explicit -C works independently of NO_COLOR, as in upstream jq. -l/--logs is a project extension and cannot be combined with -n or -R.

Ordinary input accepts consecutive JSON values, including multiline objects, and emits completed values before EOF. -s collects all JSON values from all inputs; -Rs collects their exact text as one string. Parsing errors preserve already emitted results and exit with status 4. -n evaluates once without reading input files; -e reflects the final emitted value. With no filter the identity filter is used.

The evaluator is MoonJQ 0.2.0. tostring preserves strings and serializes other values; tojson emits JSON text. String slices use Unicode scalar indices, including negative and open bounds, in nested filters as well as at the top level. Numeric/boolean/object slices fail instead of silently returning null. Map, reduce, assignment and try/catch use the evaluator's public AST; modules, the --stream event representation, and every jq 1.8.2 diagnostic are not claimed.

#Standalone metadata

Standalone --version prints exactly jq 0.2.2 followed by one newline. Standalone --help starts with Usage: jq, lists both metadata options, and ends with a newline. Both write to stdout, leave stdin unread, and exit with status 0. Exact-version publication and verification remain recorded separately in the support record.

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