feat(jq): add input_filename / input_line_number / $ENV stubs#1490
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feat(jq): add input_filename / input_line_number / $ENV stubs#1490
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Real jq exposes three IO-introspection facilities that jaq does not: `input_filename`, `input_line_number`, and the `$ENV` variable. LLM agents trained on stedfan/jq routinely emit calls to these and were hitting bashkit's compile error against ~800 chars of prepended stdlib, which they fail to recognise as "function missing" and re-run on a loop. Resolution: - Define `input_filename: null;` and `input_line_number: 0;` in the compatibility shim. Bashkit reads inputs as a single concatenated stream via shell redirection, so per-input file metadata is not tracked; null/0 mirror jq's documented "no input" defaults. - Bind `$ENV` as a public global variable with the same shell-env map the existing `env` filter exposes. `$ENV == env` now holds true. - Add a dedicated jq guide (`crates/bashkit/docs/jq.md`) listing the supported flags, variables, and notable shimmed/stubbed filters so downstream agents and humans have a documented surface to target. Closes #1486
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Summary
Real jq exposes three IO-introspection facilities that jaq does not —
input_filename,input_line_number, and the$ENVvariable. LLM agents trained on stedfan/jq routinely emit calls to these and hit bashkit's compile error against ~800 chars of prepended stdlib, which they fail to recognise as "function missing" and re-run on a loop.Changes
input_filename: null;andinput_line_number: 0;added toJQ_COMPAT_DEFS. Bashkit reads inputs as a single concatenated stream via shell redirection, so per-input file metadata is not tracked;null/0mirror jq's documented "no input" defaults.$ENVregistered as a public global variable bound to the same shell-env map that the existingenvfilter exposes.$ENV == envnow holds true.crates/bashkit/docs/jq.md— new rustdoc guide listing supported flags, variables, and notable shimmed/stubbed filters so downstream agents and humans have a documented surface to target. Wired in asjq_guideinlib.rs.Tests
crates/bashkit/src/builtins/jq.rs:test_jq_input_filename_compiles_and_returns_nulltest_jq_input_filename_with_chained_filter_compiles— reproduces the LLM idiom from the bug reporttest_jq_input_line_number_compiles_and_returns_zerotest_jq_dollar_env_returns_shell_envtest_jq_dollar_env_matches_env_functioncrates/bashkit/tests/spec_cases/jq/jq.test.sh:jq_input_filename_returns_nulljq_input_line_number_returns_zerojq_dollar_env_returns_shell_envTest plan
cargo fmt --checkcargo clippy --all-targets -- -D warningscargo test -p bashkit --features "jq http_client"(lib + doctests, all 116 doctests + 2211 lib tests green)cargo test -p bashkit --features jq --test spec_tests(jq_spec_testsincludes new cases)Closes #1486
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