#sed

Version 0.1.0 behavior is documented here. The support record separates local verification from published MoonX behavior; this version is an unpublished candidate.

Edit byte-oriented text streams with p, d, q, =, and substitution s/REGEXP/REPLACEMENT/. Read stdin when no input file is given or an operand is -. Multiple input files share line numbering, address ranges and the last-line address $.

moonx cli/sed 's/old/new/g' file.txt
moonx cli/sed -n '2,5p' file.txt
moonx cli/sed -E 's/([0-9]+)/[\1]/g' file.txt

-n/--quiet/--silent suppresses automatic output. Use repeated -e/--expression and -f/--file options to combine scripts in order. -E or -r selects extended regular expressions; basic expressions are the default. A first-line #n comment also disables automatic output.

Addresses accept positive line numbers, $, /REGEXP/, two-address ranges and ! inversion. Substitution supports &, replacement captures \1 through \9, g, a positive occurrence number, and p. An empty expression reuses the last executed regular expression. Unterminated input records retain their missing final newline; later output inserts the required record separator.

In-place editing, hold space, branches, command groups, multiline commands, pattern backreferences, word assertions and locale-aware matching are not included. Unsupported syntax is rejected before input is processed. --help and --version are available. Exit status is 0 on success, 1 for an invalid script or evaluation error, and 2 for an unreadable input file.