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gron.awk

Run tests coverage

Similar to tomnomnom/gron but in Awk.

Features true JSON parser in pure Awk.

Reasonably fast with Gawk/Mawk/GoAWK even on large-ish files. Slow with BWK on big JSON files (100K+).

Developed in xonixx/intellij-awk. Incubated from xonixx/awk_lab.

Usage

Gron:

$ echo '{"a":[1,2,3]}' | ./gron.awk
json={}
json.a=[]
json.a[0]=1
json.a[1]=2
json.a[2]=3

Un-Gron:

$ echo '{"a":[1,2,3]}' | ./gron.awk | ./gron.awk - -u
{
  "a": [
    1,
    2,
    3
  ]
}

Filter part of JSON:

$ curl -s "https://api.github.com/repos/xonixx/gron.awk/commits?per_page=1" \
     | ./gron.awk | grep "commit.author" | ./gron.awk - -u
[
  {
    "commit": {
      "author": {
        "date": "2021-10-19T11:31:34Z",
        "email": "[email protected]",
        "name": "xonix"
      }
    }
  }
]

JSON structure:

$ curl -s 'https://ip-ranges.amazonaws.com/ip-ranges.json' | ./gron.awk - -s
.syncToken = "1634535194"
.createDate = "2021-10-18-05-33-14"
.prefixes[].ip_prefix = "3.5.140.0/22"
.prefixes[].region = "ap-northeast-2"
.prefixes[].service = "AMAZON"
.prefixes[].network_border_group = "ap-northeast-2"
.ipv6_prefixes[].ipv6_prefix = "2a05:d07a:a000::/40"
.ipv6_prefixes[].region = "eu-south-1"
.ipv6_prefixes[].service = "AMAZON"
.ipv6_prefixes[].network_border_group = "eu-south-1"

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adrianbiro

gron.awk's Issues

Test failures with Mawk

Ubuntu 22.04.3 LTS

$ mawk -W version
mawk 1.3.4 20200120
Copyright 2008-2019,2020, Thomas E. Dickey
Copyright 1991-1996,2014, Michael D. Brennan

random-funcs:       srandom/random
regex-funcs:        internal
compiled limits:
sprintf buffer      8192
maximum-integer     2147483647
  goal 'JSONTestSuite_installed' [already satisfied].
  goal 'test_suite' ...
    FAIL : i_number_double_huge_neg_exp.json
    FAIL : i_number_huge_exp.json
    FAIL : i_number_neg_int_huge_exp.json
    FAIL : i_number_pos_double_huge_exp.json
    FAIL : i_number_real_neg_overflow.json
    FAIL : i_number_real_pos_overflow.json
    FAIL : i_number_real_underflow.json
    FAIL : i_number_too_big_neg_int.json
    FAIL : i_number_too_big_pos_int.json
    FAIL : i_number_very_big_negative_int.json
    FAIL : i_object_key_lone_2nd_surrogate.json
    FAIL : i_string_1st_surrogate_but_2nd_missing.json
    FAIL : i_string_1st_valid_surrogate_2nd_invalid.json
    FAIL : i_string_UTF-16LE_with_BOM.json
    FAIL : i_string_UTF-8_invalid_sequence.json
    FAIL : i_string_UTF8_surrogate_U+D800.json
    FAIL : i_string_incomplete_surrogate_and_escape_valid.json
    FAIL : i_string_incomplete_surrogate_pair.json
    FAIL : i_string_incomplete_surrogates_escape_valid.json
    FAIL : i_string_invalid_lonely_surrogate.json
    FAIL : i_string_invalid_surrogate.json
    FAIL : i_string_invalid_utf-8.json
    FAIL : i_string_inverted_surrogates_U+1D11E.json
    FAIL : i_string_iso_latin_1.json
    FAIL : i_string_lone_second_surrogate.json
    FAIL : i_string_lone_utf8_continuation_byte.json
    FAIL : i_string_not_in_unicode_range.json
    FAIL : i_string_overlong_sequence_2_bytes.json
    FAIL : i_string_overlong_sequence_6_bytes.json
    FAIL : i_string_overlong_sequence_6_bytes_null.json
    FAIL : i_string_truncated-utf-8.json
    FAIL : i_string_utf16BE_no_BOM.json
    FAIL : i_string_utf16LE_no_BOM.json
    FAIL : i_structure_500_nested_arrays.json
    FAIL : i_structure_UTF-8_BOM_empty_object.json
 SUCCESS : n_array_1_true_without_comma.json
 SUCCESS : n_array_a_invalid_utf8.json
 SUCCESS : n_array_colon_instead_of_comma.json
 SUCCESS : n_array_comma_after_close.json
 SUCCESS : n_array_comma_and_number.json
 SUCCESS : n_array_double_comma.json
 SUCCESS : n_array_double_extra_comma.json
 SUCCESS : n_array_extra_close.json
 SUCCESS : n_array_extra_comma.json
 SUCCESS : n_array_incomplete.json
 SUCCESS : n_array_incomplete_invalid_value.json
 SUCCESS : n_array_inner_array_no_comma.json
 SUCCESS : n_array_invalid_utf8.json
 SUCCESS : n_array_items_separated_by_semicolon.json
 SUCCESS : n_array_just_comma.json
 SUCCESS : n_array_just_minus.json
 SUCCESS : n_array_missing_value.json
 SUCCESS : n_array_newlines_unclosed.json
 SUCCESS : n_array_number_and_comma.json
 SUCCESS : n_array_number_and_several_commas.json
 SUCCESS : n_array_spaces_vertical_tab_formfeed.json
 SUCCESS : n_array_star_inside.json
 SUCCESS : n_array_unclosed.json
 SUCCESS : n_array_unclosed_trailing_comma.json
 SUCCESS : n_array_unclosed_with_new_lines.json
 SUCCESS : n_array_unclosed_with_object_inside.json
 SUCCESS : n_incomplete_false.json
 SUCCESS : n_incomplete_null.json
 SUCCESS : n_incomplete_true.json
 SUCCESS : n_multidigit_number_then_00.json
 SUCCESS : n_number_++.json
 SUCCESS : n_number_+1.json
 SUCCESS : n_number_+Inf.json
 SUCCESS : n_number_-01.json
 SUCCESS : n_number_-1.0..json
 SUCCESS : n_number_-2..json
 SUCCESS : n_number_-NaN.json
 SUCCESS : n_number_.-1.json
 SUCCESS : n_number_.2e-3.json
 SUCCESS : n_number_0.1.2.json
 SUCCESS : n_number_0.3e+.json
 SUCCESS : n_number_0.3e.json
 SUCCESS : n_number_0.e1.json
 SUCCESS : n_number_0_capital_E+.json
 SUCCESS : n_number_0_capital_E.json
 SUCCESS : n_number_0e+.json
 SUCCESS : n_number_0e.json
 SUCCESS : n_number_1.0e+.json
 SUCCESS : n_number_1.0e-.json
 SUCCESS : n_number_1.0e.json
 SUCCESS : n_number_1_000.json
 SUCCESS : n_number_1eE2.json
 SUCCESS : n_number_2.e+3.json
 SUCCESS : n_number_2.e-3.json
 SUCCESS : n_number_2.e3.json
 SUCCESS : n_number_9.e+.json
 SUCCESS : n_number_Inf.json
 SUCCESS : n_number_NaN.json
 SUCCESS : n_number_U+FF11_fullwidth_digit_one.json
 SUCCESS : n_number_expression.json
 SUCCESS : n_number_hex_1_digit.json
 SUCCESS : n_number_hex_2_digits.json
 SUCCESS : n_number_infinity.json
 SUCCESS : n_number_invalid+-.json
 SUCCESS : n_number_invalid-negative-real.json
 SUCCESS : n_number_invalid-utf-8-in-bigger-int.json
 SUCCESS : n_number_invalid-utf-8-in-exponent.json
 SUCCESS : n_number_invalid-utf-8-in-int.json
 SUCCESS : n_number_minus_infinity.json
 SUCCESS : n_number_minus_sign_with_trailing_garbage.json
 SUCCESS : n_number_minus_space_1.json
 SUCCESS : n_number_neg_int_starting_with_zero.json
 SUCCESS : n_number_neg_real_without_int_part.json
 SUCCESS : n_number_neg_with_garbage_at_end.json
 SUCCESS : n_number_real_garbage_after_e.json
 SUCCESS : n_number_real_with_invalid_utf8_after_e.json
 SUCCESS : n_number_real_without_fractional_part.json
 SUCCESS : n_number_starting_with_dot.json
 SUCCESS : n_number_with_alpha.json
 SUCCESS : n_number_with_alpha_char.json
 SUCCESS : n_number_with_leading_zero.json
 SUCCESS : n_object_bad_value.json
 SUCCESS : n_object_bracket_key.json
 SUCCESS : n_object_comma_instead_of_colon.json
 SUCCESS : n_object_double_colon.json
 SUCCESS : n_object_emoji.json
 SUCCESS : n_object_garbage_at_end.json
 SUCCESS : n_object_key_with_single_quotes.json
 SUCCESS : n_object_lone_continuation_byte_in_key_and_trailing_comma.json
 SUCCESS : n_object_missing_colon.json
 SUCCESS : n_object_missing_key.json
 SUCCESS : n_object_missing_semicolon.json
 SUCCESS : n_object_missing_value.json
 SUCCESS : n_object_no-colon.json
 SUCCESS : n_object_non_string_key.json
 SUCCESS : n_object_non_string_key_but_huge_number_instead.json
 SUCCESS : n_object_repeated_null_null.json
 SUCCESS : n_object_several_trailing_commas.json
 SUCCESS : n_object_single_quote.json
 SUCCESS : n_object_trailing_comma.json
 SUCCESS : n_object_trailing_comment.json
 SUCCESS : n_object_trailing_comment_open.json
 SUCCESS : n_object_trailing_comment_slash_open.json
 SUCCESS : n_object_trailing_comment_slash_open_incomplete.json
 SUCCESS : n_object_two_commas_in_a_row.json
 SUCCESS : n_object_unquoted_key.json
 SUCCESS : n_object_unterminated-value.json
 SUCCESS : n_object_with_single_string.json
 SUCCESS : n_object_with_trailing_garbage.json
 SUCCESS : n_single_space.json
 SUCCESS : n_string_1_surrogate_then_escape.json
 SUCCESS : n_string_1_surrogate_then_escape_u.json
 SUCCESS : n_string_1_surrogate_then_escape_u1.json
 SUCCESS : n_string_1_surrogate_then_escape_u1x.json
 SUCCESS : n_string_accentuated_char_no_quotes.json
 SUCCESS : n_string_backslash_00.json
 SUCCESS : n_string_escape_x.json
 SUCCESS : n_string_escaped_backslash_bad.json
 SUCCESS : n_string_escaped_ctrl_char_tab.json
 SUCCESS : n_string_escaped_emoji.json
 SUCCESS : n_string_incomplete_escape.json
 SUCCESS : n_string_incomplete_escaped_character.json
 SUCCESS : n_string_incomplete_surrogate.json
 SUCCESS : n_string_incomplete_surrogate_escape_invalid.json
 SUCCESS : n_string_invalid-utf-8-in-escape.json
 SUCCESS : n_string_invalid_backslash_esc.json
 SUCCESS : n_string_invalid_unicode_escape.json
 SUCCESS : n_string_invalid_utf8_after_escape.json
 SUCCESS : n_string_leading_uescaped_thinspace.json
 SUCCESS : n_string_no_quotes_with_bad_escape.json
 SUCCESS : n_string_single_doublequote.json
 SUCCESS : n_string_single_quote.json
 SUCCESS : n_string_single_string_no_double_quotes.json
 SUCCESS : n_string_start_escape_unclosed.json
 SUCCESS : n_string_unescaped_ctrl_char.json
 SUCCESS : n_string_unescaped_newline.json
 SUCCESS : n_string_unescaped_tab.json
 SUCCESS : n_string_unicode_CapitalU.json
 SUCCESS : n_string_with_trailing_garbage.json
 SUCCESS : n_structure_U+2060_word_joined.json
 SUCCESS : n_structure_UTF8_BOM_no_data.json
 SUCCESS : n_structure_angle_bracket_..json
 SUCCESS : n_structure_angle_bracket_null.json
 SUCCESS : n_structure_array_trailing_garbage.json
 SUCCESS : n_structure_array_with_extra_array_close.json
 SUCCESS : n_structure_array_with_unclosed_string.json
 SUCCESS : n_structure_ascii-unicode-identifier.json
 SUCCESS : n_structure_capitalized_True.json
 SUCCESS : n_structure_close_unopened_array.json
 SUCCESS : n_structure_comma_instead_of_closing_brace.json
 SUCCESS : n_structure_double_array.json
 SUCCESS : n_structure_end_array.json
 SUCCESS : n_structure_incomplete_UTF8_BOM.json
 SUCCESS : n_structure_lone-invalid-utf-8.json
 SUCCESS : n_structure_lone-open-bracket.json
 SUCCESS : n_structure_no_data.json
 SUCCESS : n_structure_null-byte-outside-string.json
 SUCCESS : n_structure_number_with_trailing_garbage.json
 SUCCESS : n_structure_object_followed_by_closing_object.json
 SUCCESS : n_structure_object_unclosed_no_value.json
 SUCCESS : n_structure_object_with_comment.json
 SUCCESS : n_structure_object_with_trailing_garbage.json
 SUCCESS : n_structure_open_array_apostrophe.json
 SUCCESS : n_structure_open_array_comma.json
 SUCCESS : n_structure_open_array_open_object.json
 SUCCESS : n_structure_open_array_open_string.json
 SUCCESS : n_structure_open_array_string.json
 SUCCESS : n_structure_open_object.json
 SUCCESS : n_structure_open_object_close_array.json
 SUCCESS : n_structure_open_object_comma.json
 SUCCESS : n_structure_open_object_open_array.json
 SUCCESS : n_structure_open_object_open_string.json
 SUCCESS : n_structure_open_object_string_with_apostrophes.json
 SUCCESS : n_structure_open_open.json
 SUCCESS : n_structure_single_eacute.json
 SUCCESS : n_structure_single_star.json
 SUCCESS : n_structure_trailing_#.json
 SUCCESS : n_structure_uescaped_LF_before_string.json
 SUCCESS : n_structure_unclosed_array.json
 SUCCESS : n_structure_unclosed_array_partial_null.json
 SUCCESS : n_structure_unclosed_array_unfinished_false.json
 SUCCESS : n_structure_unclosed_array_unfinished_true.json
 SUCCESS : n_structure_unclosed_object.json
 SUCCESS : n_structure_unicode-identifier.json
 SUCCESS : n_structure_whitespace_U+2060_word_joiner.json
 SUCCESS : n_structure_whitespace_formfeed.json
    FAIL : y_array_arraysWithSpaces.json
    FAIL : y_array_empty-string.json
    FAIL : y_array_empty.json
    FAIL : y_array_ending_with_newline.json
    FAIL : y_array_false.json
    FAIL : y_array_heterogeneous.json
    FAIL : y_array_null.json
    FAIL : y_array_with_1_and_newline.json
    FAIL : y_array_with_leading_space.json
    FAIL : y_array_with_several_null.json
    FAIL : y_array_with_trailing_space.json
    FAIL : y_number.json
    FAIL : y_number_0e+1.json
    FAIL : y_number_0e1.json
    FAIL : y_number_after_space.json
    FAIL : y_number_double_close_to_zero.json
    FAIL : y_number_int_with_exp.json
    FAIL : y_number_minus_zero.json
    FAIL : y_number_negative_int.json
    FAIL : y_number_negative_one.json
    FAIL : y_number_negative_zero.json
    FAIL : y_number_real_capital_e.json
    FAIL : y_number_real_capital_e_neg_exp.json
    FAIL : y_number_real_capital_e_pos_exp.json
    FAIL : y_number_real_exponent.json
    FAIL : y_number_real_fraction_exponent.json
    FAIL : y_number_real_neg_exp.json
    FAIL : y_number_real_pos_exponent.json
    FAIL : y_number_simple_int.json
    FAIL : y_number_simple_real.json
    FAIL : y_object.json
    FAIL : y_object_basic.json
    FAIL : y_object_duplicated_key.json
    FAIL : y_object_duplicated_key_and_value.json
    FAIL : y_object_empty.json
    FAIL : y_object_empty_key.json
    FAIL : y_object_escaped_null_in_key.json
    FAIL : y_object_extreme_numbers.json
    FAIL : y_object_long_strings.json
    FAIL : y_object_simple.json
    FAIL : y_object_string_unicode.json
    FAIL : y_object_with_newlines.json
    FAIL : y_string_1_2_3_bytes_UTF-8_sequences.json
    FAIL : y_string_accepted_surrogate_pair.json
    FAIL : y_string_accepted_surrogate_pairs.json
    FAIL : y_string_allowed_escapes.json
    FAIL : y_string_backslash_and_u_escaped_zero.json
    FAIL : y_string_backslash_doublequotes.json
    FAIL : y_string_comments.json
    FAIL : y_string_double_escape_a.json
    FAIL : y_string_double_escape_n.json
    FAIL : y_string_escaped_control_character.json
    FAIL : y_string_escaped_noncharacter.json
    FAIL : y_string_in_array.json
    FAIL : y_string_in_array_with_leading_space.json
    FAIL : y_string_last_surrogates_1_and_2.json
    FAIL : y_string_nbsp_uescaped.json
    FAIL : y_string_nonCharacterInUTF-8_U+10FFFF.json
    FAIL : y_string_nonCharacterInUTF-8_U+FFFF.json
    FAIL : y_string_null_escape.json
    FAIL : y_string_one-byte-utf-8.json
    FAIL : y_string_pi.json
    FAIL : y_string_reservedCharacterInUTF-8_U+1BFFF.json
    FAIL : y_string_simple_ascii.json
    FAIL : y_string_space.json
    FAIL : y_string_surrogates_U+1D11E_MUSICAL_SYMBOL_G_CLEF.json
    FAIL : y_string_three-byte-utf-8.json
    FAIL : y_string_two-byte-utf-8.json
    FAIL : y_string_u+2028_line_sep.json
    FAIL : y_string_u+2029_par_sep.json
    FAIL : y_string_uEscape.json
    FAIL : y_string_uescaped_newline.json
    FAIL : y_string_unescaped_char_delete.json
    FAIL : y_string_unicode.json
    FAIL : y_string_unicodeEscapedBackslash.json
    FAIL : y_string_unicode_2.json
    FAIL : y_string_unicode_U+10FFFE_nonchar.json
    FAIL : y_string_unicode_U+1FFFE_nonchar.json
    FAIL : y_string_unicode_U+200B_ZERO_WIDTH_SPACE.json
    FAIL : y_string_unicode_U+2064_invisible_plus.json
    FAIL : y_string_unicode_U+FDD0_nonchar.json
    FAIL : y_string_unicode_U+FFFE_nonchar.json
    FAIL : y_string_unicode_escaped_double_quote.json
    FAIL : y_string_utf8.json
    FAIL : y_string_with_del_character.json
    FAIL : y_structure_lonely_false.json
    FAIL : y_structure_lonely_int.json
    FAIL : y_structure_lonely_negative_real.json
    FAIL : y_structure_lonely_null.json
    FAIL : y_structure_lonely_string.json
    FAIL : y_structure_lonely_true.json
    FAIL : y_structure_string_empty.json
    FAIL : y_structure_trailing_newline.json
    FAIL : y_structure_true_in_array.json
    FAIL : y_structure_whitespace_array.json
    FAIL : number_-9223372036854775808.json
    FAIL : number_-9223372036854775809.json
    FAIL : number_1.0.json
    FAIL : number_1.000000000000000005.json
    FAIL : number_1000000000000000.json
    FAIL : number_10000000000000000999.json
    FAIL : number_1e-999.json
    FAIL : number_1e6.json
    FAIL : number_9223372036854775807.json
    FAIL : number_9223372036854775808.json
    FAIL : object_key_nfc_nfd.json
    FAIL : object_key_nfd_nfc.json
    FAIL : object_same_key_different_values.json
    FAIL : object_same_key_same_value.json
    FAIL : object_same_key_unclear_values.json
    FAIL : string_1_escaped_invalid_codepoint.json
    FAIL : string_1_invalid_codepoint.json
    FAIL : string_2_escaped_invalid_codepoints.json
    FAIL : string_2_invalid_codepoints.json
    FAIL : string_3_escaped_invalid_codepoints.json
    FAIL : string_3_invalid_codepoints.json
    FAIL : string_with_escaped_NULL.json
Successes: 186
Fails:     152
  goal 'test_suite' took 0.309 s
  total time 0.313 s

`./makesure tested_awks` causes error

  goal 'tested_gawk51' ...
  goal 'fhtagn_installed' [already satisfied].
  goal 'debug' ...
/home/xonix/proj/gron.awk/soft/gawk51: error while loading shared libraries: libreadline.so.6: cannot open shared object file: No such file or directory

Support for multiple input files

First of all, thanks for making gron.awk - amazing project :)

Is there an easy way to add support for multiple input files? So that you can do something like:

gron.awk file1.json file2.json file3.json

Not a critical feature, as I can emulate it using xargs, but would be nice to have.

Optimize input reading

Atm we read the whole JSON into memory, then parse as a whole string.

What if we read one char at a time from input and parse on the fly?

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