#rev

Version 0.1.4 behavior is documented here. The support record separates local verification from published MoonX behavior; moonx examples use registry releases.

Reverse each input line byte-for-byte:

printf 'abc\n' | moonx cli/rev
moonx cli/rev input.txt

Line-feed bytes and the absence of a final line feed are preserved. Input is standard input when operands are absent; multiple file operands are processed in order without inserted bytes, and later files continue after an error. An explicit - is a filename in the frozen util-linux 2.40 profile; this replaces the previous workspace stdin extension while published behavior remains frozen. The reader retains only the current record and a 64 KiB input block; reversal allocates one record-sized output buffer. Storage therefore grows with the longest record, rather than the complete input. Output uses a 64 KiB buffer, so the first write can wait for that buffer to fill, EOF or an input error. Completed accepted records are flushed after an input error; failed output writes are propagated without replaying the buffer. The profile selects the fixed Linux C-locale behavior: ASCII bytes, including NUL, are reversed without decoding; a record containing a non-ASCII byte is rejected before that record is written. Earlier complete records remain on stdout, the diagnostic reports their count, and later named files still continue. Multibyte locale character semantics are not claimed. Earlier macOS native provider observations accepted high bytes; those observations do not establish the fixed Linux provider's C-locale behavior.

#Standalone metadata

Standalone --version prints exactly rev 0.1.4 followed by one newline. Standalone --help starts with Usage: rev, lists both metadata options, and ends with a newline. Both write to stdout, leave stdin unread, and exit with status 0. Exact-version publication and verification remain recorded separately in the support record.

Source Files

main.mbt

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