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fq/pkg/interp/internal.jq
2022-01-05 21:41:11 +01:00

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# is here to be defined as early as possible to allow debugging
# TODO: move some _* to builtin.jq etc?
def stdin_tty: null | _stdin;
def stdout_tty: null | _stdout;
def print: tostring | _stdout;
def println: ., "\n" | print;
def printerr: tostring | _stderr;
def printerrln: ., "\n" | printerr;
def debug:
( ((["DEBUG", .] | tojson) | printerrln)
, .
);
def debug(f): . as $c | f | debug | $c;
def _global_var($k): _global_state[$k];
def _global_var($k; f): _global_state(_global_state | .[$k] |= f) | .[$k];
def _include_paths: _global_var("include_paths");
def _include_paths(f): _global_var("include_paths"; f);
def _options_stack: _global_var("options_stack");
def _options_stack(f): _global_var("options_stack"; f);
def _options_cache: _global_var("options_cache");
def _options_cache(f): _global_var("options_cache"; f);
def _cli_last_expr_error: _global_var("cli_last_expr_error");
def _cli_last_expr_error(f): _global_var("cli_last_expr_error"; f);
def _input_filename: _global_var("input_filename");
def _input_filename(f): _global_var("input_filename"; f);
def _input_filenames: _global_var("input_filenames");
def _input_filenames(f): _global_var("input_filenames"; f);
def _input_strings: _global_var("input_strings");
def _input_strings(f): _global_var("input_strings"; f);
def _input_strings_lines: _global_var("input_strings_lines");
def _input_strings_lines(f): _global_var("input_strings_lines"; f);
def _input_io_errors: _global_var("input_io_errors");
def _input_io_errors(f): _global_var("input_io_errors"; f);
def _input_decode_errors: _global_var("input_decode_errors");
def _input_decode_errors(f): _global_var("input_decode_errors"; f);
def _variables: _global_var("variables");
def _variables(f): _global_var("variables"; f);
# eval f and finally eval fin even on empty or error.
# note that if f outputs more than one value fin will be called
# for each value.
def _finally(f; fin):
( try f // (fin | empty)
catch (fin as $_ | error)
| fin as $_
| .
);
# TODO: figure out a saner way to force int
def _to_int: (. % (. + 1));
# integer division
# inspried by https://github.com/itchyny/gojq/issues/63#issuecomment-765066351
def _intdiv($a; $b):
( ($a | _to_int) as $a
| ($b | _to_int) as $b
| ($a - ($a % $b)) / $b
);
def _esc: "\u001b";
def _ansi:
{
clear_line: "\(_esc)[2K",
};
# valid jq identifier, start with alpha or underscore then zero or more alpha, num or underscore
def _is_ident: type == "string" and test("^[a-zA-Z_][a-zA-Z_0-9]*$");
# escape " and \
def _escape_ident: gsub("(?<g>[\\\\\"])"; "\\\(.g)");
# format number with fixed number of decimals
def _numbertostring($decimals):
( . as $n
| [ (. % (. + 1)) # truncate to integer
, "."
, foreach range($decimals) as $_ (1; . * 10; ($n * .) % 10)
]
| join("")
);
def _repeat_break(f):
try repeat(f)
catch
if . == "break" then empty
else error
end;
def _recurse_break(f):
try recurse(f)
catch
if . == "break" then empty
else error
end;
# TODO: better way? what about nested eval errors?
def _eval_is_compile_error: type == "object" and .error != null and .what != null;
def _eval_compile_error_tostring:
"\(.filename // "src"):\(.line):\(.column): \(.error)";
def _eval($expr; $filename; f; on_error; on_compile_error):
try
eval($expr; $filename) | f
catch
if _eval_is_compile_error then on_compile_error
else on_error
end;
def _is_scalar:
type |. != "array" and . != "object";
def _is_context_canceled_error: . == "context canceled";
def _error_str: "error: \(.)";