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miller/pkg/transformers
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John Kerl be19a21280
Remove os.Exit callsites below the entrypoint: phase 2 (#2202) 
* Remove os.Exit callsites below the entrypoint: phase 2 (plans/exit.md)

Phase 2 of plans/exit.md: the FlagParser signature change.

- FlagParser gains an error return; all 259 inline parser closures in
  option_parse.go and NoOpParse1 updated (mechanical rewrite, compiler-checked).
- FlagTable.Parse returns (bool, error); its nine callers (climain passes one
  and two, .mlrrc line handling, verb-local flag parsing in tee/join/put/
  filter/split, and the repl/script terminals) propagate the error instead of
  letting parsers kill the process.
- cli.CheckArgCount returns its missing-argument message as an error rather
  than printing and exiting; new cli.FlagErrorf (counterpart of VerbErrorf)
  carries user-facing main-flag messages.
- The 14 print-and-exit sites inside parser closures become returned errors;
  --list-color-codes/--list-color-names return ExitRequest{0} after printing.
- The repl and script terminals translate ExitRequest into their int return
  codes, so 'mlr repl --list-color-codes' still exits 0.
- pkg/cli is now os.Exit-free; stale comments about exiting parsers updated
  (the completion introspection accessors remain, since parsers mutate the
  options struct).

Stderr messages and exit codes are byte-identical, including the two-line
missing-argument and --seed messages and the trailing-period forms pinned by
test/cases/cli-mfrom/0003.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Merge main (recutils #2201); convert its three new parser closures

Same mechanical rewrite as the rest of phase 2: error return signature plus
final 'return nil' on --irecutils/--orecutils/--recutils.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
2026-07-15 14:09:57 -04:00
..
utils Add mlr rank verb (#2178) 2026-07-07 17:35:18 -04:00
aaa_chain_transformer.go Performance and style fixes (#1981) 2026-02-18 09:19:31 -05:00
aaa_record_transformer.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
aaa_transformer_json.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
aaa_transformer_json_test.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
aaa_transformer_table.go Add bootstrap-ci verb for bootstrap-resampling confidence intervals (#1670) (#2189) 2026-07-14 17:00:34 -04:00
aaa_verb_usage.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
altkv.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
bar.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
bootstrap.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
bootstrap_ci.go Add bootstrap-ci verb for bootstrap-resampling confidence intervals (#1670) (#2189) 2026-07-14 17:00:34 -04:00
bootstrap_ci_test.go Add bootstrap-ci verb for bootstrap-resampling confidence intervals (#1670) (#2189) 2026-07-14 17:00:34 -04:00
case.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
cat.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
check.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
clean_whitespace.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
count.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
count_similar.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
cut.go Remove os.Exit callsites below the entrypoint: phase 1 (#2198) 2026-07-15 11:34:01 -04:00
decimate.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
describe.go Add mlr describe schema/shape introspection verb (#2098 PR6) (#2132) 2026-07-03 18:43:49 -04:00
doc.go Export library code in pkg/ (#1391) 2023-09-10 17:15:13 -04:00
fill_down.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
fill_empty.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
flatten.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
format_values.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
fraction.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
gap.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
grep.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
group_by.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
group_like.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
having_fields.go Remove os.Exit callsites below the entrypoint: phase 1 (#2198) 2026-07-15 11:34:01 -04:00
head.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
histogram.go Add sparkline DSL function and mlr sparkline verb (#166) (#2177) 2026-07-07 15:47:01 -04:00
join.go Remove os.Exit callsites below the entrypoint: phase 2 (#2202) 2026-07-15 14:09:57 -04:00
json_parse.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
json_stringify.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
label.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
latin1_to_utf8.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
merge_fields.go Remove os.Exit callsites below the entrypoint: phase 1 (#2198) 2026-07-15 11:34:01 -04:00
most_or_least_frequent.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
nest.go Remove os.Exit callsites below the entrypoint: phase 1 (#2198) 2026-07-15 11:34:01 -04:00
nothing.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
put_or_filter.go Remove os.Exit callsites below the entrypoint: phase 2 (#2202) 2026-07-15 14:09:57 -04:00
rank.go Add mlr rank verb (#2178) 2026-07-07 17:35:18 -04:00
README.md Export library code in pkg/ (#1391) 2023-09-10 17:15:13 -04:00
regularize.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
remove_empty_columns.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
rename.go Remove os.Exit callsites below the entrypoint: phase 1 (#2198) 2026-07-15 11:34:01 -04:00
reorder.go Remove os.Exit callsites below the entrypoint: phase 1 (#2198) 2026-07-15 11:34:01 -04:00
repeat.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
reshape.go Remove os.Exit callsites below the entrypoint: phase 1 (#2198) 2026-07-15 11:34:01 -04:00
sample.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
sec2gmt.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
sec2gmtdate.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
seqgen.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
shuffle.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
skip_trivial_records.go Exit 0 when skip-trivial-records is used and CSV/TSV ends with blank lines (#1535) (#2146) 2026-07-06 15:22:51 -04:00
sort.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
sort_within_records.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
sparkline.go Add sparkline DSL function and mlr sparkline verb (#166) (#2177) 2026-07-07 15:47:01 -04:00
sparsify.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
split.go Remove os.Exit callsites below the entrypoint: phase 2 (#2202) 2026-07-15 14:09:57 -04:00
stats1.go Add sliding-window mode to mlr stats1 via -w {n} (#1017) (#2186) 2026-07-14 10:24:41 -04:00
stats1_test.go Add sliding-window mode to mlr stats1 via -w {n} (#1017) (#2186) 2026-07-14 10:24:41 -04:00
stats2.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
step.go Allow more step -a options to specify the number of records back (#1002) (#2190) 2026-07-14 16:39:48 -04:00
step_test.go Allow more step -a options to specify the number of records back (#1002) (#2190) 2026-07-14 16:39:48 -04:00
subs.go Remove os.Exit callsites below the entrypoint: phase 1 (#2198) 2026-07-15 11:34:01 -04:00
summary.go Document meaning of hyphenated field_type values in mlr summary (#1082) (#2149) 2026-07-05 20:34:16 -04:00
surv.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
tac.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
tail.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
tee.go Remove os.Exit callsites below the entrypoint: phase 2 (#2202) 2026-07-15 14:09:57 -04:00
template.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
top.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
unflatten.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
uniq.go Cross-reference head -n 1 -g from uniq for keep-all-columns dedupe (#1075) (#2158) 2026-07-06 15:26:39 -04:00
unspace.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
unsparsify.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00
utf8_to_latin1.go Tier-2 structured verb options: OptionSpec, initial migration (#2098) (#2111) 2026-07-03 14:27:23 -04:00

README.md

Logic for transforming input records into output records as requested by the user (sort, filter, etc.).:

  • The IRecordTransformer abstract record-transformer interface datatype, as well as the ChainTransformer Go-channel chaining mechanism for piping one transformer into the next.
  • The transformer lookup table, used for Miller command-line parsing, verb construction, and online help.
  • All the concrete record-transformers such as cat, tac, sort, put, and so on.