package csexp-query

csexp-query

A minimal command-line tool to query canonical s-expressions (csexp) from stdin.

Installation

opam install csexp-query

Usage

csexp-query QUERY

Reads a csexp s-expression from stdin, applies the query, and outputs results (one csexp per line).

Query Operations

Multiple top-level expressions are implicitly piped.

Examples

# Get a field value
dune describe --format=csexp | csexp-query '(field name)'

# Get the first element
dune describe --format=csexp | csexp-query '(index 0)'

# Iterate over a list field
dune describe --format=csexp | csexp-query '(field modules) each'

# Get multiple fields
dune describe --format=csexp | csexp-query '(cat (field name) (field version))'

# Chain operations
dune describe --format=csexp | csexp-query '(index 0) (field name)'

Query Syntax

The query syntax is compatible with a subset of sexp.

Exit Codes

• 0: Success (including empty result)
• 1: Parse error or query error