#csplit

Version 0.1.0 is a local candidate. The support record distinguishes workspace checks from published MoonX behavior; the examples become available after publication.

Split a file into sections at line numbers or basic regular expressions:

moonx cli/csplit input.txt 10 20
moonx cli/csplit -s -f section- input.txt '/^Chapter/' '{*}'

NUMBER splits before that absolute line; /REGEXP/ splits before a matching line and %REGEXP% discards the preceding section. Regex delimiters may be followed by a positive or negative line offset. {N} repeats the preceding pattern N additional times. Regex {*} repeats through the remaining input; numeric repetitions that reach beyond the last line report an error. The first operand - reads stdin. All input bytes, including NUL and an unterminated final line, are preserved in selected fragments.

Files are named xx00, xx01, … . -f/--prefix changes the prefix and -n/--digits sets the minimum number of suffix digits. Byte counts are printed for created files unless -s/--silent or -q/--quiet is selected. -z/--elide-empty-files omits empty fragments. Split failures remove the files created by that invocation unless -k/--keep-files is used.

Input is buffered and matching uses ASCII patterns over byte-valued lines. Existing output paths are refused. Backreferences, word extensions, non-ASCII patterns, locale-sensitive matching, custom suffix formats and --suppress-matched are rejected. --help and --version provide command information.